AyeCode / invoicing

includes/wpinv-discount-functions.php

Spacing +480 added lines, -480 removed lines

@@ -7,110 +7,110 @@ 
  */
  
 // MUST have WordPress.
-if ( !defined( 'WPINC' ) ) {
-    exit( 'Do NOT access this file directly: ' . basename( __FILE__ ) );
+if (!defined('WPINC')) {
+    exit('Do NOT access this file directly: ' . basename(__FILE__));
 }
 
 function wpinv_get_discount_types() {
     $discount_types = array(
-                        'percent'   => __( 'Percentage', 'invoicing' ),
-                        'flat'     => __( 'Flat Amount', 'invoicing' ),
+                        'percent'   => __('Percentage', 'invoicing'),
+                        'flat'     => __('Flat Amount', 'invoicing'),
                     );
-    return (array)apply_filters( 'wpinv_discount_types', $discount_types );
+    return (array) apply_filters('wpinv_discount_types', $discount_types);
 }
 
-function wpinv_get_discount_type_name( $type = '' ) {
+function wpinv_get_discount_type_name($type = '') {
     $types = wpinv_get_discount_types();
-    return isset( $types[ $type ] ) ? $types[ $type ] : '';
+    return isset($types[$type]) ? $types[$type] : '';
 }
 
-function wpinv_delete_discount( $data ) {
-    if ( ! isset( $data['_wpnonce'] ) || ! wp_verify_nonce( $data['_wpnonce'], 'wpinv_discount_nonce' ) ) {
-        wp_die( __( 'Trying to cheat or something?', 'invoicing' ), __( 'Error', 'invoicing' ), array( 'response' => 403 ) );
+function wpinv_delete_discount($data) {
+    if (!isset($data['_wpnonce']) || !wp_verify_nonce($data['_wpnonce'], 'wpinv_discount_nonce')) {
+        wp_die(__('Trying to cheat or something?', 'invoicing'), __('Error', 'invoicing'), array('response' => 403));
     }
 
-    if( ! wpinv_current_user_can_manage_invoicing() ) {
-        wp_die( __( 'You do not have permission to delete discount codes', 'invoicing' ), __( 'Error', 'invoicing' ), array( 'response' => 403 ) );
+    if (!wpinv_current_user_can_manage_invoicing()) {
+        wp_die(__('You do not have permission to delete discount codes', 'invoicing'), __('Error', 'invoicing'), array('response' => 403));
     }
 
     $discount_id = $data['discount'];
-    wpinv_remove_discount( $discount_id );
+    wpinv_remove_discount($discount_id);
 }
-add_action( 'wpinv_delete_discount', 'wpinv_delete_discount' );
+add_action('wpinv_delete_discount', 'wpinv_delete_discount');
 
-function wpinv_activate_discount( $data ) {
-    if ( ! isset( $data['_wpnonce'] ) || ! wp_verify_nonce( $data['_wpnonce'], 'wpinv_discount_nonce' ) ) {
-        wp_die( __( 'Trying to cheat or something?', 'invoicing' ), __( 'Error', 'invoicing' ), array( 'response' => 403 ) );
+function wpinv_activate_discount($data) {
+    if (!isset($data['_wpnonce']) || !wp_verify_nonce($data['_wpnonce'], 'wpinv_discount_nonce')) {
+        wp_die(__('Trying to cheat or something?', 'invoicing'), __('Error', 'invoicing'), array('response' => 403));
     }
 
-    if( ! wpinv_current_user_can_manage_invoicing() ) {
-        wp_die( __( 'You do not have permission to edit discount codes', 'invoicing' ), __( 'Error', 'invoicing' ), array( 'response' => 403 ) );
+    if (!wpinv_current_user_can_manage_invoicing()) {
+        wp_die(__('You do not have permission to edit discount codes', 'invoicing'), __('Error', 'invoicing'), array('response' => 403));
     }
 
-    $id = absint( $data['discount'] );
-    wpinv_update_discount_status( $id, 'publish' );
+    $id = absint($data['discount']);
+    wpinv_update_discount_status($id, 'publish');
 }
-add_action( 'wpinv_activate_discount', 'wpinv_activate_discount' );
+add_action('wpinv_activate_discount', 'wpinv_activate_discount');
 
-function wpinv_deactivate_discount( $data ) {
-    if ( ! isset( $data['_wpnonce'] ) || ! wp_verify_nonce( $data['_wpnonce'], 'wpinv_discount_nonce' ) ) {
-        wp_die( __( 'Trying to cheat or something?', 'invoicing' ), __( 'Error', 'invoicing' ), array( 'response' => 403 ) );
+function wpinv_deactivate_discount($data) {
+    if (!isset($data['_wpnonce']) || !wp_verify_nonce($data['_wpnonce'], 'wpinv_discount_nonce')) {
+        wp_die(__('Trying to cheat or something?', 'invoicing'), __('Error', 'invoicing'), array('response' => 403));
     }
 
-    if( ! wpinv_current_user_can_manage_invoicing() ) {
-        wp_die( __( 'You do not have permission to create discount codes', 'invoicing' ), array( 'response' => 403 ) );
+    if (!wpinv_current_user_can_manage_invoicing()) {
+        wp_die(__('You do not have permission to create discount codes', 'invoicing'), array('response' => 403));
     }
 
-    $id = absint( $data['discount'] );
-    wpinv_update_discount_status( $id, 'pending' );
+    $id = absint($data['discount']);
+    wpinv_update_discount_status($id, 'pending');
 }
-add_action( 'wpinv_deactivate_discount', 'wpinv_deactivate_discount' );
+add_action('wpinv_deactivate_discount', 'wpinv_deactivate_discount');
 
-function wpinv_get_discounts( $args = array() ) {
+function wpinv_get_discounts($args = array()) {
     $defaults = array(
         'post_type'      => 'wpi_discount',
         'posts_per_page' => 20,
         'paged'          => null,
-        'post_status'    => array( 'publish', 'pending', 'draft', 'expired' )
+        'post_status'    => array('publish', 'pending', 'draft', 'expired')
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
-    $discounts = get_posts( $args );
+    $discounts = get_posts($args);
 
-    if ( $discounts ) {
+    if ($discounts) {
         return $discounts;
     }
 
-    if( ! $discounts && ! empty( $args['s'] ) ) {
+    if (!$discounts && !empty($args['s'])) {
         $args['meta_key']     = '_wpi_discount_code';
         $args['meta_value']   = $args['s'];
         $args['meta_compare'] = 'LIKE';
-        unset( $args['s'] );
-        $discounts = get_posts( $args );
+        unset($args['s']);
+        $discounts = get_posts($args);
     }
 
-    if( $discounts ) {
+    if ($discounts) {
         return $discounts;
     }
 
     return false;
 }
 
-function wpinv_get_all_discounts( $args = array() ) {
+function wpinv_get_all_discounts($args = array()) {
 
-    $args = wp_parse_args( $args, array(
-        'status'         => array( 'publish' ),
-        'limit'          => get_option( 'posts_per_page' ),
+    $args = wp_parse_args($args, array(
+        'status'         => array('publish'),
+        'limit'          => get_option('posts_per_page'),
         'page'           => 1,
         'exclude'        => array(),
         'orderby'        => 'date',
         'order'          => 'DESC',
-        'type'           => array_keys( wpinv_get_discount_types() ),
+        'type'           => array_keys(wpinv_get_discount_types()),
         'meta_query'     => array(),
         'return'         => 'objects',
         'paginate'       => false,
-    ) );
+    ));
 
     $wp_query_args = array(
         'post_type'      => 'wpi_discount',
@@ -120,18 +120,18 @@ 
         'fields'         => 'ids',
         'orderby'        => $args['orderby'],
         'order'          => $args['order'],
-        'paged'          => absint( $args['page'] ),
+        'paged'          => absint($args['page']),
     );
 
-    if ( ! empty( $args['exclude'] ) ) {
-        $wp_query_args['post__not_in'] = array_map( 'absint', $args['exclude'] );
+    if (!empty($args['exclude'])) {
+        $wp_query_args['post__not_in'] = array_map('absint', $args['exclude']);
     }
 
-    if ( ! $args['paginate' ] ) {
+    if (!$args['paginate']) {
         $wp_query_args['no_found_rows'] = true;
     }
 
-    if ( ! empty( $args['search'] ) ) {
+    if (!empty($args['search'])) {
 
         $wp_query_args['meta_query'][] = array(
             'key'     => '_wpi_discount_code',
@@ -141,11 +141,11 @@ 
 
     }
     
-    if ( ! empty( $args['type'] ) ) {
-        $types = wpinv_parse_list( $args['type'] );
+    if (!empty($args['type'])) {
+        $types = wpinv_parse_list($args['type']);
         $wp_query_args['meta_query'][] = array(
             'key'     => '_wpi_discount_type',
-            'value'   => implode( ',', $types ),
+            'value'   => implode(',', $types),
             'compare' => 'IN',
         );
     }
@@ -153,17 +153,17 @@ 
     $wp_query_args = apply_filters('wpinv_get_discount_args', $wp_query_args, $args);
 
     // Get results.
-    $discounts = new WP_Query( $wp_query_args );
+    $discounts = new WP_Query($wp_query_args);
 
-    if ( 'objects' === $args['return'] ) {
-        $return = array_map( 'get_post', $discounts->posts );
-    } elseif ( 'self' === $args['return'] ) {
+    if ('objects' === $args['return']) {
+        $return = array_map('get_post', $discounts->posts);
+    } elseif ('self' === $args['return']) {
         return $discounts;
     } else {
         $return = $discounts->posts;
     }
 
-    if ( $args['paginate' ] ) {
+    if ($args['paginate']) {
         return (object) array(
             'discounts'      => $return,
             'total'         => $discounts->found_posts,
@@ -180,9 +180,9 @@ 
 
     $discounts  = wpinv_get_discounts();
 
-    if ( $discounts) {
-        foreach ( $discounts as $discount ) {
-            if ( wpinv_is_discount_active( $discount->ID ) ) {
+    if ($discounts) {
+        foreach ($discounts as $discount) {
+            if (wpinv_is_discount_active($discount->ID)) {
                 $has_active = true;
                 break;
             }
@@ -191,38 +191,38 @@ 
     return $has_active;
 }
 
-function wpinv_get_discount( $discount_id = 0 ) {
-    if( empty( $discount_id ) ) {
+function wpinv_get_discount($discount_id = 0) {
+    if (empty($discount_id)) {
         return false;
     }
     
-    if ( get_post_type( $discount_id ) != 'wpi_discount' ) {
+    if (get_post_type($discount_id) != 'wpi_discount') {
         return false;
     }
 
-    $discount = get_post( $discount_id );
+    $discount = get_post($discount_id);
 
     return $discount;
 }
 
-function wpinv_get_discount_by_code( $code = '' ) {
-    if( empty( $code ) || ! is_string( $code ) ) {
+function wpinv_get_discount_by_code($code = '') {
+    if (empty($code) || !is_string($code)) {
         return false;
     }
 
-    return wpinv_get_discount_by( 'code', $code );
+    return wpinv_get_discount_by('code', $code);
 }
 
-function wpinv_get_discount_by( $field = '', $value = '' ) {
-    if( empty( $field ) || empty( $value ) ) {
+function wpinv_get_discount_by($field = '', $value = '') {
+    if (empty($field) || empty($value)) {
         return false;
     }
 
-    if( ! is_string( $field ) ) {
+    if (!is_string($field)) {
         return false;
     }
 
-    switch( strtolower( $field ) ) {
+    switch (strtolower($field)) {
 
         case 'code':
             $meta_query     = array();
@@ -232,32 +232,32 @@ 
                 'compare' => '='
             );
             
-            $discount = wpinv_get_discounts( array(
+            $discount = wpinv_get_discounts(array(
                 'posts_per_page' => 1,
                 'post_status'    => 'any',
                 'meta_query'     => $meta_query,
-            ) );
+            ));
             
-            if( $discount ) {
+            if ($discount) {
                 $discount = $discount[0];
             }
 
             break;
 
         case 'id':
-            $discount = wpinv_get_discount( $value );
+            $discount = wpinv_get_discount($value);
 
             break;
 
         case 'name':
-            $discount = get_posts( array(
+            $discount = get_posts(array(
                 'post_type'      => 'wpi_discount',
                 'name'           => $value,
                 'posts_per_page' => 1,
                 'post_status'    => 'any'
-            ) );
+            ));
 
-            if( $discount ) {
+            if ($discount) {
                 $discount = $discount[0];
             }
 
@@ -267,96 +267,96 @@ 
             return false;
     }
 
-    if( ! empty( $discount ) ) {
+    if (!empty($discount)) {
         return $discount;
     }
 
     return false;
 }
 
-function wpinv_store_discount( $post_id, $data, $post, $update = false ) {
+function wpinv_store_discount($post_id, $data, $post, $update = false) {
     $meta = array(
-        'code'              => isset( $data['code'] )             ? sanitize_text_field( $data['code'] )              : '',
-        'type'              => isset( $data['type'] )             ? sanitize_text_field( $data['type'] )              : 'percent',
-        'amount'            => isset( $data['amount'] )           ? wpinv_sanitize_amount( $data['amount'] )          : '',
-        'start'             => isset( $data['start'] )            ? sanitize_text_field( $data['start'] )             : '',
-        'expiration'        => isset( $data['expiration'] )       ? sanitize_text_field( $data['expiration'] )        : '',
-        'min_total'         => isset( $data['min_total'] )        ? wpinv_sanitize_amount( $data['min_total'] )       : '',
-        'max_total'         => isset( $data['max_total'] )        ? wpinv_sanitize_amount( $data['max_total'] )       : '',
-        'max_uses'          => isset( $data['max_uses'] )         ? absint( $data['max_uses'] )                       : '',
-        'items'             => isset( $data['items'] )            ? $data['items']                                    : array(),
-        'excluded_items'    => isset( $data['excluded_items'] )   ? $data['excluded_items']                           : array(),
-        'is_recurring'      => isset( $data['recurring'] )        ? (bool)$data['recurring']                          : false,
-        'is_single_use'     => isset( $data['single_use'] )       ? (bool)$data['single_use']                         : false,
-        'uses'              => isset( $data['uses'] )             ? (int)$data['uses']                                : false,
+        'code'              => isset($data['code']) ? sanitize_text_field($data['code']) : '',
+        'type'              => isset($data['type']) ? sanitize_text_field($data['type']) : 'percent',
+        'amount'            => isset($data['amount']) ? wpinv_sanitize_amount($data['amount']) : '',
+        'start'             => isset($data['start']) ? sanitize_text_field($data['start']) : '',
+        'expiration'        => isset($data['expiration']) ? sanitize_text_field($data['expiration']) : '',
+        'min_total'         => isset($data['min_total']) ? wpinv_sanitize_amount($data['min_total']) : '',
+        'max_total'         => isset($data['max_total']) ? wpinv_sanitize_amount($data['max_total']) : '',
+        'max_uses'          => isset($data['max_uses']) ? absint($data['max_uses']) : '',
+        'items'             => isset($data['items']) ? $data['items'] : array(),
+        'excluded_items'    => isset($data['excluded_items']) ? $data['excluded_items'] : array(),
+        'is_recurring'      => isset($data['recurring']) ? (bool) $data['recurring'] : false,
+        'is_single_use'     => isset($data['single_use']) ? (bool) $data['single_use'] : false,
+        'uses'              => isset($data['uses']) ? (int) $data['uses'] : false,
     );
 
-    if ( $meta['type'] == 'percent' && (float)$meta['amount'] > 100 ) {
+    if ($meta['type'] == 'percent' && (float) $meta['amount'] > 100) {
         $meta['amount'] = 100;
     }
 
-    if ( !empty( $meta['start'] ) ) {
-        $meta['start']      = date_i18n( 'Y-m-d H:i:s', strtotime( $meta['start'] ) );
+    if (!empty($meta['start'])) {
+        $meta['start'] = date_i18n('Y-m-d H:i:s', strtotime($meta['start']));
     }
 
-    if ( !empty( $meta['expiration'] ) ) {
-        $meta['expiration'] = date_i18n( 'Y-m-d H:i:s', strtotime( $meta['expiration'] ) );
+    if (!empty($meta['expiration'])) {
+        $meta['expiration'] = date_i18n('Y-m-d H:i:s', strtotime($meta['expiration']));
 
-        if ( !empty( $meta['start'] ) && strtotime( $meta['start'] ) > strtotime( $meta['expiration'] ) ) {
+        if (!empty($meta['start']) && strtotime($meta['start']) > strtotime($meta['expiration'])) {
             $meta['expiration'] = $meta['start'];
         }
     }
     
-    if ( $meta['uses'] === false ) {
-        unset( $meta['uses'] );
+    if ($meta['uses'] === false) {
+        unset($meta['uses']);
     }
     
-    if ( ! empty( $meta['items'] ) ) {
-        foreach ( $meta['items'] as $key => $item ) {
-            if ( 0 === intval( $item ) ) {
-                unset( $meta['items'][ $key ] );
+    if (!empty($meta['items'])) {
+        foreach ($meta['items'] as $key => $item) {
+            if (0 === intval($item)) {
+                unset($meta['items'][$key]);
             }
         }
     }
     
-    if ( ! empty( $meta['excluded_items'] ) ) {
-        foreach ( $meta['excluded_items'] as $key => $item ) {
-            if ( 0 === intval( $item ) ) {
-                unset( $meta['excluded_items'][ $key ] );
+    if (!empty($meta['excluded_items'])) {
+        foreach ($meta['excluded_items'] as $key => $item) {
+            if (0 === intval($item)) {
+                unset($meta['excluded_items'][$key]);
             }
         }
     }
     
-    $meta = apply_filters( 'wpinv_update_discount', $meta, $post_id, $post );
+    $meta = apply_filters('wpinv_update_discount', $meta, $post_id, $post);
     
-    do_action( 'wpinv_pre_update_discount', $meta, $post_id, $post );
+    do_action('wpinv_pre_update_discount', $meta, $post_id, $post);
     
-    foreach( $meta as $key => $value ) {
-        update_post_meta( $post_id, '_wpi_discount_' . $key, $value );
+    foreach ($meta as $key => $value) {
+        update_post_meta($post_id, '_wpi_discount_' . $key, $value);
     }
     
-    do_action( 'wpinv_post_update_discount', $meta, $post_id, $post );
+    do_action('wpinv_post_update_discount', $meta, $post_id, $post);
     
     return $post_id;
 }
 
-function wpinv_remove_discount( $discount_id = 0 ) {
-    do_action( 'wpinv_pre_delete_discount', $discount_id );
+function wpinv_remove_discount($discount_id = 0) {
+    do_action('wpinv_pre_delete_discount', $discount_id);
 
-    wp_delete_post( $discount_id, true );
+    wp_delete_post($discount_id, true);
 
-    do_action( 'wpinv_post_delete_discount', $discount_id );
+    do_action('wpinv_post_delete_discount', $discount_id);
 }
 
-function wpinv_update_discount_status( $code_id = 0, $new_status = 'publish' ) {
-    $discount = wpinv_get_discount(  $code_id );
+function wpinv_update_discount_status($code_id = 0, $new_status = 'publish') {
+    $discount = wpinv_get_discount($code_id);
 
-    if ( $discount ) {
-        do_action( 'wpinv_pre_update_discount_status', $code_id, $new_status, $discount->post_status );
+    if ($discount) {
+        do_action('wpinv_pre_update_discount_status', $code_id, $new_status, $discount->post_status);
 
-        wp_update_post( array( 'ID' => $code_id, 'post_status' => $new_status ) );
+        wp_update_post(array('ID' => $code_id, 'post_status' => $new_status));
 
-        do_action( 'wpinv_post_update_discount_status', $code_id, $new_status, $discount->post_status );
+        do_action('wpinv_post_update_discount_status', $code_id, $new_status, $discount->post_status);
 
         return true;
     }
@@ -364,173 +364,173 @@ 
     return false;
 }
 
-function wpinv_discount_exists( $code_id ) {
-    if ( wpinv_get_discount(  $code_id ) ) {
+function wpinv_discount_exists($code_id) {
+    if (wpinv_get_discount($code_id)) {
         return true;
     }
 
     return false;
 }
 
-function wpinv_is_discount_active( $code_id = null ) {
-    $discount = wpinv_get_discount(  $code_id );
+function wpinv_is_discount_active($code_id = null) {
+    $discount = wpinv_get_discount($code_id);
     $return   = false;
 
-    if ( $discount ) {
-        if ( wpinv_is_discount_expired( $code_id ) ) {
-            if( defined( 'DOING_AJAX' ) ) {
-                wpinv_set_error( 'wpinv-discount-error', __( 'This discount is expired.', 'invoicing' ) );
+    if ($discount) {
+        if (wpinv_is_discount_expired($code_id)) {
+            if (defined('DOING_AJAX')) {
+                wpinv_set_error('wpinv-discount-error', __('This discount is expired.', 'invoicing'));
             }
-        } elseif ( $discount->post_status == 'publish' ) {
+        } elseif ($discount->post_status == 'publish') {
             $return = true;
         } else {
-            if( defined( 'DOING_AJAX' ) ) {
-                wpinv_set_error( 'wpinv-discount-error', __( 'This discount is not active.', 'invoicing' ) );
+            if (defined('DOING_AJAX')) {
+                wpinv_set_error('wpinv-discount-error', __('This discount is not active.', 'invoicing'));
             }
         }
     }
 
-    return apply_filters( 'wpinv_is_discount_active', $return, $code_id );
+    return apply_filters('wpinv_is_discount_active', $return, $code_id);
 }
 
-function wpinv_get_discount_code( $code_id = null ) {
-    $code = get_post_meta( $code_id, '_wpi_discount_code', true );
+function wpinv_get_discount_code($code_id = null) {
+    $code = get_post_meta($code_id, '_wpi_discount_code', true);
 
-    return apply_filters( 'wpinv_get_discount_code', $code, $code_id );
+    return apply_filters('wpinv_get_discount_code', $code, $code_id);
 }
 
-function wpinv_get_discount_start_date( $code_id = null ) {
-    $start_date = get_post_meta( $code_id, '_wpi_discount_start', true );
+function wpinv_get_discount_start_date($code_id = null) {
+    $start_date = get_post_meta($code_id, '_wpi_discount_start', true);
 
-    return apply_filters( 'wpinv_get_discount_start_date', $start_date, $code_id );
+    return apply_filters('wpinv_get_discount_start_date', $start_date, $code_id);
 }
 
-function wpinv_get_discount_expiration( $code_id = null ) {
-    $expiration = get_post_meta( $code_id, '_wpi_discount_expiration', true );
+function wpinv_get_discount_expiration($code_id = null) {
+    $expiration = get_post_meta($code_id, '_wpi_discount_expiration', true);
 
-    return apply_filters( 'wpinv_get_discount_expiration', $expiration, $code_id );
+    return apply_filters('wpinv_get_discount_expiration', $expiration, $code_id);
 }
 
-function wpinv_get_discount_max_uses( $code_id = null ) {
-    $max_uses = get_post_meta( $code_id, '_wpi_discount_max_uses', true );
+function wpinv_get_discount_max_uses($code_id = null) {
+    $max_uses = get_post_meta($code_id, '_wpi_discount_max_uses', true);
 
-    return (int) apply_filters( 'wpinv_get_discount_max_uses', $max_uses, $code_id );
+    return (int) apply_filters('wpinv_get_discount_max_uses', $max_uses, $code_id);
 }
 
-function wpinv_get_discount_uses( $code_id = null ) {
-    $uses = get_post_meta( $code_id, '_wpi_discount_uses', true );
+function wpinv_get_discount_uses($code_id = null) {
+    $uses = get_post_meta($code_id, '_wpi_discount_uses', true);
 
-    return (int) apply_filters( 'wpinv_get_discount_uses', $uses, $code_id );
+    return (int) apply_filters('wpinv_get_discount_uses', $uses, $code_id);
 }
 
-function wpinv_get_discount_min_total( $code_id = null ) {
-    $min_total = get_post_meta( $code_id, '_wpi_discount_min_total', true );
+function wpinv_get_discount_min_total($code_id = null) {
+    $min_total = get_post_meta($code_id, '_wpi_discount_min_total', true);
 
-    return (float) apply_filters( 'wpinv_get_discount_min_total', $min_total, $code_id );
+    return (float) apply_filters('wpinv_get_discount_min_total', $min_total, $code_id);
 }
 
-function wpinv_get_discount_max_total( $code_id = null ) {
-    $max_total = get_post_meta( $code_id, '_wpi_discount_max_total', true );
+function wpinv_get_discount_max_total($code_id = null) {
+    $max_total = get_post_meta($code_id, '_wpi_discount_max_total', true);
 
-    return (float) apply_filters( 'wpinv_get_discount_max_total', $max_total, $code_id );
+    return (float) apply_filters('wpinv_get_discount_max_total', $max_total, $code_id);
 }
 
-function wpinv_get_discount_amount( $code_id = null ) {
-    $amount = get_post_meta( $code_id, '_wpi_discount_amount', true );
+function wpinv_get_discount_amount($code_id = null) {
+    $amount = get_post_meta($code_id, '_wpi_discount_amount', true);
 
-    return (float) apply_filters( 'wpinv_get_discount_amount', $amount, $code_id );
+    return (float) apply_filters('wpinv_get_discount_amount', $amount, $code_id);
 }
 
-function wpinv_get_discount_type( $code_id = null, $name = false ) {
-    $type = strtolower( get_post_meta( $code_id, '_wpi_discount_type', true ) );
+function wpinv_get_discount_type($code_id = null, $name = false) {
+    $type = strtolower(get_post_meta($code_id, '_wpi_discount_type', true));
     
-    if ( $name ) {
-        $name = wpinv_get_discount_type_name( $type );
+    if ($name) {
+        $name = wpinv_get_discount_type_name($type);
         
-        return apply_filters( 'wpinv_get_discount_type_name', $name, $code_id );
+        return apply_filters('wpinv_get_discount_type_name', $name, $code_id);
     }
 
-    return apply_filters( 'wpinv_get_discount_type', $type, $code_id );
+    return apply_filters('wpinv_get_discount_type', $type, $code_id);
 }
 
-function wpinv_discount_status( $status ) {
-    switch( $status ){
+function wpinv_discount_status($status) {
+    switch ($status) {
         case 'expired' :
-            $name = __( 'Expired', 'invoicing' );
+            $name = __('Expired', 'invoicing');
             break;
         case 'publish' :
         case 'active' :
-            $name = __( 'Active', 'invoicing' );
+            $name = __('Active', 'invoicing');
             break;
         default :
-            $name = __( 'Inactive', 'invoicing' );
+            $name = __('Inactive', 'invoicing');
             break;
     }
     return $name;
 }
 
-function wpinv_get_discount_excluded_items( $code_id = null ) {
-    $excluded_items = get_post_meta( $code_id, '_wpi_discount_excluded_items', true );
+function wpinv_get_discount_excluded_items($code_id = null) {
+    $excluded_items = get_post_meta($code_id, '_wpi_discount_excluded_items', true);
 
-    if ( empty( $excluded_items ) || ! is_array( $excluded_items ) ) {
+    if (empty($excluded_items) || !is_array($excluded_items)) {
         $excluded_items = array();
     }
 
-    return (array) apply_filters( 'wpinv_get_discount_excluded_items', $excluded_items, $code_id );
+    return (array) apply_filters('wpinv_get_discount_excluded_items', $excluded_items, $code_id);
 }
 
-function wpinv_get_discount_item_reqs( $code_id = null ) {
-    $item_reqs = get_post_meta( $code_id, '_wpi_discount_items', true );
+function wpinv_get_discount_item_reqs($code_id = null) {
+    $item_reqs = get_post_meta($code_id, '_wpi_discount_items', true);
 
-    if ( empty( $item_reqs ) || ! is_array( $item_reqs ) ) {
+    if (empty($item_reqs) || !is_array($item_reqs)) {
         $item_reqs = array();
     }
 
-    return (array) apply_filters( 'wpinv_get_discount_item_reqs', $item_reqs, $code_id );
+    return (array) apply_filters('wpinv_get_discount_item_reqs', $item_reqs, $code_id);
 }
 
-function wpinv_get_discount_item_condition( $code_id = 0 ) {
-    return get_post_meta( $code_id, '_wpi_discount_item_condition', true );
+function wpinv_get_discount_item_condition($code_id = 0) {
+    return get_post_meta($code_id, '_wpi_discount_item_condition', true);
 }
 
-function wpinv_is_discount_not_global( $code_id = 0 ) {
-    return (bool) get_post_meta( $code_id, '_wpi_discount_is_not_global', true );
+function wpinv_is_discount_not_global($code_id = 0) {
+    return (bool) get_post_meta($code_id, '_wpi_discount_is_not_global', true);
 }
 
-function wpinv_is_discount_expired( $code_id = null ) {
-    $discount = wpinv_get_discount(  $code_id );
+function wpinv_is_discount_expired($code_id = null) {
+    $discount = wpinv_get_discount($code_id);
     $return   = false;
 
-    if ( $discount ) {
-        $expiration = wpinv_get_discount_expiration( $code_id );
-        if ( $expiration ) {
-            $expiration = strtotime( $expiration );
-            if ( $expiration < current_time( 'timestamp' ) ) {
+    if ($discount) {
+        $expiration = wpinv_get_discount_expiration($code_id);
+        if ($expiration) {
+            $expiration = strtotime($expiration);
+            if ($expiration < current_time('timestamp')) {
                 // Discount is expired
-                wpinv_update_discount_status( $code_id, 'pending' );
+                wpinv_update_discount_status($code_id, 'pending');
                 $return = true;
             }
         }
     }
 
-    return apply_filters( 'wpinv_is_discount_expired', $return, $code_id );
+    return apply_filters('wpinv_is_discount_expired', $return, $code_id);
 }
 
-function wpinv_is_discount_started( $code_id = null ) {
-    $discount = wpinv_get_discount(  $code_id );
+function wpinv_is_discount_started($code_id = null) {
+    $discount = wpinv_get_discount($code_id);
     $return   = false;
 
-    if ( $discount ) {
-        $start_date = wpinv_get_discount_start_date( $code_id );
+    if ($discount) {
+        $start_date = wpinv_get_discount_start_date($code_id);
 
-        if ( $start_date ) {
-            $start_date = strtotime( $start_date );
+        if ($start_date) {
+            $start_date = strtotime($start_date);
 
-            if ( $start_date < current_time( 'timestamp' ) ) {
+            if ($start_date < current_time('timestamp')) {
                 // Discount has past the start date
                 $return = true;
             } else {
-                wpinv_set_error( 'wpinv-discount-error', __( 'This discount is not active yet.', 'invoicing' ) );
+                wpinv_set_error('wpinv-discount-error', __('This discount is not active yet.', 'invoicing'));
             }
         } else {
             // No start date for this discount, so has to be true
@@ -538,159 +538,159 @@ 
         }
     }
 
-    return apply_filters( 'wpinv_is_discount_started', $return, $code_id );
+    return apply_filters('wpinv_is_discount_started', $return, $code_id);
 }
 
-function wpinv_check_discount_dates( $code_id = null ) {
-    $discount = wpinv_get_discount(  $code_id );
+function wpinv_check_discount_dates($code_id = null) {
+    $discount = wpinv_get_discount($code_id);
     $return   = false;
 
-    if ( $discount ) {
-        $start_date = wpinv_get_discount_start_date( $code_id );
+    if ($discount) {
+        $start_date = wpinv_get_discount_start_date($code_id);
 
-        if ( $start_date ) {
-            $start_date = strtotime( $start_date );
+        if ($start_date) {
+            $start_date = strtotime($start_date);
 
-            if ( $start_date < current_time( 'timestamp' ) ) {
+            if ($start_date < current_time('timestamp')) {
                 // Discount has past the start date
                 $return = true;
             } else {
-                wpinv_set_error( 'wpinv-discount-error', __( 'This discount is not active yet.', 'invoicing' ) );
+                wpinv_set_error('wpinv-discount-error', __('This discount is not active yet.', 'invoicing'));
             }
         } else {
             // No start date for this discount, so has to be true
             $return = true;
         }
         
-        if ( $return ) {
-            $expiration = wpinv_get_discount_expiration( $code_id );
+        if ($return) {
+            $expiration = wpinv_get_discount_expiration($code_id);
             
-            if ( $expiration ) {
-                $expiration = strtotime( $expiration );
-                if ( $expiration < current_time( 'timestamp' ) ) {
+            if ($expiration) {
+                $expiration = strtotime($expiration);
+                if ($expiration < current_time('timestamp')) {
                     // Discount is expired
-                    wpinv_update_discount_status( $code_id, 'pending' );
+                    wpinv_update_discount_status($code_id, 'pending');
                     $return = true;
                 }
             }
         }
     }
     
-    return apply_filters( 'wpinv_check_discount_dates', $return, $code_id );
+    return apply_filters('wpinv_check_discount_dates', $return, $code_id);
 }
 
-function wpinv_is_discount_maxed_out( $code_id = null ) {
-    $discount = wpinv_get_discount(  $code_id );
+function wpinv_is_discount_maxed_out($code_id = null) {
+    $discount = wpinv_get_discount($code_id);
     $return   = false;
 
-    if ( $discount ) {
-        $uses = wpinv_get_discount_uses( $code_id );
+    if ($discount) {
+        $uses = wpinv_get_discount_uses($code_id);
         // Large number that will never be reached
-        $max_uses = wpinv_get_discount_max_uses( $code_id );
+        $max_uses = wpinv_get_discount_max_uses($code_id);
         // Should never be greater than, but just in case
-        if ( $uses >= $max_uses && ! empty( $max_uses ) ) {
+        if ($uses >= $max_uses && !empty($max_uses)) {
             // Discount is maxed out
-            wpinv_set_error( 'wpinv-discount-error', __( 'This discount has reached its maximum usage.', 'invoicing' ) );
+            wpinv_set_error('wpinv-discount-error', __('This discount has reached its maximum usage.', 'invoicing'));
             $return = true;
         }
     }
 
-    return apply_filters( 'wpinv_is_discount_maxed_out', $return, $code_id );
+    return apply_filters('wpinv_is_discount_maxed_out', $return, $code_id);
 }
 
-function wpinv_discount_is_min_met( $code_id = null ) {
-    $discount = wpinv_get_discount( $code_id );
+function wpinv_discount_is_min_met($code_id = null) {
+    $discount = wpinv_get_discount($code_id);
     $return   = false;
 
-    if ( $discount ) {
-        $min         = (float)wpinv_get_discount_min_total( $code_id );
-        $cart_amount = (float)wpinv_get_cart_discountable_subtotal( $code_id );
+    if ($discount) {
+        $min         = (float) wpinv_get_discount_min_total($code_id);
+        $cart_amount = (float) wpinv_get_cart_discountable_subtotal($code_id);
 
-        if ( !$min > 0 || $cart_amount >= $min ) {
+        if (!$min > 0 || $cart_amount >= $min) {
             // Minimum has been met
             $return = true;
         } else {
-            wpinv_set_error( 'wpinv-discount-error', sprintf( __( 'Minimum invoice amount should be %s', 'invoicing' ), wpinv_price( wpinv_format_amount( $min ) ) ) );
+            wpinv_set_error('wpinv-discount-error', sprintf(__('Minimum invoice amount should be %s', 'invoicing'), wpinv_price(wpinv_format_amount($min))));
         }
     }
 
-    return apply_filters( 'wpinv_is_discount_min_met', $return, $code_id );
+    return apply_filters('wpinv_is_discount_min_met', $return, $code_id);
 }
 
-function wpinv_discount_is_max_met( $code_id = null ) {
-    $discount = wpinv_get_discount( $code_id );
+function wpinv_discount_is_max_met($code_id = null) {
+    $discount = wpinv_get_discount($code_id);
     $return   = false;
 
-    if ( $discount ) {
-        $max         = (float)wpinv_get_discount_max_total( $code_id );
-        $cart_amount = (float)wpinv_get_cart_discountable_subtotal( $code_id );
+    if ($discount) {
+        $max         = (float) wpinv_get_discount_max_total($code_id);
+        $cart_amount = (float) wpinv_get_cart_discountable_subtotal($code_id);
 
-        if ( !$max > 0 || $cart_amount <= $max ) {
+        if (!$max > 0 || $cart_amount <= $max) {
             // Minimum has been met
             $return = true;
         } else {
-            wpinv_set_error( 'wpinv-discount-error', sprintf( __( 'Maximum invoice amount should be %s', 'invoicing' ), wpinv_price( wpinv_format_amount( $max ) ) ) );
+            wpinv_set_error('wpinv-discount-error', sprintf(__('Maximum invoice amount should be %s', 'invoicing'), wpinv_price(wpinv_format_amount($max))));
         }
     }
 
-    return apply_filters( 'wpinv_is_discount_max_met', $return, $code_id );
+    return apply_filters('wpinv_is_discount_max_met', $return, $code_id);
 }
 
-function wpinv_discount_is_single_use( $code_id = 0 ) {
-    $single_use = get_post_meta( $code_id, '_wpi_discount_is_single_use', true );
-    return (bool) apply_filters( 'wpinv_is_discount_single_use', $single_use, $code_id );
+function wpinv_discount_is_single_use($code_id = 0) {
+    $single_use = get_post_meta($code_id, '_wpi_discount_is_single_use', true);
+    return (bool) apply_filters('wpinv_is_discount_single_use', $single_use, $code_id);
 }
 
-function wpinv_discount_is_recurring( $code_id = 0, $code = false ) {
-    if ( $code ) {
-        $discount = wpinv_get_discount_by_code( $code_id );
+function wpinv_discount_is_recurring($code_id = 0, $code = false) {
+    if ($code) {
+        $discount = wpinv_get_discount_by_code($code_id);
         
-        if ( !empty( $discount ) ) {
+        if (!empty($discount)) {
             $code_id = $discount->ID;
         }
     }
     
-    $recurring = get_post_meta( $code_id, '_wpi_discount_is_recurring', true );
+    $recurring = get_post_meta($code_id, '_wpi_discount_is_recurring', true);
     
-    return (bool) apply_filters( 'wpinv_is_discount_recurring', $recurring, $code_id, $code );
+    return (bool) apply_filters('wpinv_is_discount_recurring', $recurring, $code_id, $code);
 }
 
-function wpinv_discount_item_reqs_met( $code_id = null ) {
-    $item_reqs    = wpinv_get_discount_item_reqs( $code_id );
-    $condition    = wpinv_get_discount_item_condition( $code_id );
-    $excluded_ps  = wpinv_get_discount_excluded_items( $code_id );
+function wpinv_discount_item_reqs_met($code_id = null) {
+    $item_reqs    = wpinv_get_discount_item_reqs($code_id);
+    $condition    = wpinv_get_discount_item_condition($code_id);
+    $excluded_ps  = wpinv_get_discount_excluded_items($code_id);
     $cart_items   = wpinv_get_cart_contents();
-    $cart_ids     = $cart_items ? wp_list_pluck( $cart_items, 'id' ) : null;
+    $cart_ids     = $cart_items ? wp_list_pluck($cart_items, 'id') : null;
     $ret          = false;
 
-    if ( empty( $item_reqs ) && empty( $excluded_ps ) ) {
+    if (empty($item_reqs) && empty($excluded_ps)) {
         $ret = true;
     }
 
     // Normalize our data for item requirements, exclusions and cart data
     // First absint the items, then sort, and reset the array keys
-    $item_reqs = array_map( 'absint', $item_reqs );
-    asort( $item_reqs );
-    $item_reqs = array_values( $item_reqs );
+    $item_reqs = array_map('absint', $item_reqs);
+    asort($item_reqs);
+    $item_reqs = array_values($item_reqs);
 
-    $excluded_ps  = array_map( 'absint', $excluded_ps );
-    asort( $excluded_ps );
-    $excluded_ps  = array_values( $excluded_ps );
+    $excluded_ps  = array_map('absint', $excluded_ps);
+    asort($excluded_ps);
+    $excluded_ps  = array_values($excluded_ps);
 
-    $cart_ids     = array_map( 'absint', $cart_ids );
-    asort( $cart_ids );
-    $cart_ids     = array_values( $cart_ids );
+    $cart_ids     = array_map('absint', $cart_ids);
+    asort($cart_ids);
+    $cart_ids     = array_values($cart_ids);
 
     // Ensure we have requirements before proceeding
-    if ( !$ret && ! empty( $item_reqs ) ) {
-        switch( $condition ) {
+    if (!$ret && !empty($item_reqs)) {
+        switch ($condition) {
             case 'all' :
                 // Default back to true
                 $ret = true;
 
-                foreach ( $item_reqs as $item_id ) {
-                    if ( !wpinv_item_in_cart( $item_id ) ) {
-                        wpinv_set_error( 'wpinv-discount-error', __( 'The item requirements for this discount are not met.', 'invoicing' ) );
+                foreach ($item_reqs as $item_id) {
+                    if (!wpinv_item_in_cart($item_id)) {
+                        wpinv_set_error('wpinv-discount-error', __('The item requirements for this discount are not met.', 'invoicing'));
                         $ret = false;
                         break;
                     }
@@ -699,15 +699,15 @@ 
                 break;
 
             default : // Any
-                foreach ( $item_reqs as $item_id ) {
-                    if ( wpinv_item_in_cart( $item_id ) ) {
+                foreach ($item_reqs as $item_id) {
+                    if (wpinv_item_in_cart($item_id)) {
                         $ret = true;
                         break;
                     }
                 }
 
-                if( ! $ret ) {
-                    wpinv_set_error( 'wpinv-discount-error', __( 'The item requirements for this discount are not met.', 'invoicing' ) );
+                if (!$ret) {
+                    wpinv_set_error('wpinv-discount-error', __('The item requirements for this discount are not met.', 'invoicing'));
                 }
 
                 break;
@@ -716,70 +716,70 @@ 
         $ret = true;
     }
 
-    if( ! empty( $excluded_ps ) ) {
+    if (!empty($excluded_ps)) {
         // Check that there are items other than excluded ones in the cart
-        if( $cart_ids == $excluded_ps ) {
-            wpinv_set_error( 'wpinv-discount-error', __( 'This discount is not valid for the cart contents.', 'invoicing' ) );
+        if ($cart_ids == $excluded_ps) {
+            wpinv_set_error('wpinv-discount-error', __('This discount is not valid for the cart contents.', 'invoicing'));
             $ret = false;
         }
     }
 
-    return (bool) apply_filters( 'wpinv_is_discount_item_req_met', $ret, $code_id, $condition );
+    return (bool) apply_filters('wpinv_is_discount_item_req_met', $ret, $code_id, $condition);
 }
 
-function wpinv_is_discount_used( $code = null, $user = '', $code_id = 0 ) {
+function wpinv_is_discount_used($code = null, $user = '', $code_id = 0) {
     global $wpi_checkout_id;
     
     $return = false;
 
-    if ( empty( $code_id ) ) {
-        $code_id = wpinv_get_discount_id_by_code( $code );
+    if (empty($code_id)) {
+        $code_id = wpinv_get_discount_id_by_code($code);
         
-        if( empty( $code_id ) ) {
+        if (empty($code_id)) {
             return false; // No discount was found
         }
     }
 
-    if ( wpinv_discount_is_single_use( $code_id ) ) {
+    if (wpinv_discount_is_single_use($code_id)) {
         $payments = array();
 
         $user_id = 0;
-        if ( is_int( $user ) ) {
-            $user_id = absint( $user );
-        } else if ( is_email( $user ) && $user_data = get_user_by( 'email', $user ) ) {
+        if (is_int($user)) {
+            $user_id = absint($user);
+        } else if (is_email($user) && $user_data = get_user_by('email', $user)) {
             $user_id = $user_data->ID;
-        } else if ( $user_data = get_user_by( 'login', $user ) ) {
+        } else if ($user_data = get_user_by('login', $user)) {
             $user_id = $user_data->ID;
-        } else if ( absint( $user ) > 0 ) {
-            $user_id = absint( $user );
+        } else if (absint($user) > 0) {
+            $user_id = absint($user);
         }
 
-        if ( !empty( $user_id ) ) {
-            $query    = array( 'user' => $user_id, 'limit' => false );
-            $payments = wpinv_get_invoices( $query ); // Get all payments with matching user id
+        if (!empty($user_id)) {
+            $query    = array('user' => $user_id, 'limit' => false);
+            $payments = wpinv_get_invoices($query); // Get all payments with matching user id
         }
 
-        if ( $payments ) {
-            foreach ( $payments as $payment ) {
+        if ($payments) {
+            foreach ($payments as $payment) {
                 // Don't count discount used for current invoice chekcout.
-                if ( !empty( $wpi_checkout_id ) && $wpi_checkout_id == $payment->ID ) {
+                if (!empty($wpi_checkout_id) && $wpi_checkout_id == $payment->ID) {
                     continue;
                 }
                 
-                if ( $payment->has_status( array( 'wpi-cancelled', 'wpi-failed' ) ) ) {
+                if ($payment->has_status(array('wpi-cancelled', 'wpi-failed'))) {
                     continue;
                 }
 
-                $discounts = $payment->get_discounts( true );
-                if ( empty( $discounts ) ) {
+                $discounts = $payment->get_discounts(true);
+                if (empty($discounts)) {
                     continue;
                 }
 
-                $discounts = $discounts && !is_array( $discounts ) ? explode( ',', $discounts ) : $discounts;
+                $discounts = $discounts && !is_array($discounts) ? explode(',', $discounts) : $discounts;
 
-                if ( !empty( $discounts ) && is_array( $discounts ) ) {
-                    if ( in_array( strtolower( $code ), array_map( 'strtolower', $discounts ) ) ) {
-                        wpinv_set_error( 'wpinv-discount-error', __( 'This discount has already been redeemed.', 'invoicing' ) );
+                if (!empty($discounts) && is_array($discounts)) {
+                    if (in_array(strtolower($code), array_map('strtolower', $discounts))) {
+                        wpinv_set_error('wpinv-discount-error', __('This discount has already been redeemed.', 'invoicing'));
                         $return = true;
                         break;
                     }
@@ -788,61 +788,61 @@ 
         }
     }
 
-    return apply_filters( 'wpinv_is_discount_used', $return, $code, $user );
+    return apply_filters('wpinv_is_discount_used', $return, $code, $user);
 }
 
-function wpinv_is_discount_valid( $code = '', $user = '', $set_error = true ) {
+function wpinv_is_discount_valid($code = '', $user = '', $set_error = true) {
     $return      = false;
-    $discount_id = wpinv_get_discount_id_by_code( $code );
-    $user        = trim( $user );
+    $discount_id = wpinv_get_discount_id_by_code($code);
+    $user        = trim($user);
 
-    if ( wpinv_get_cart_contents() ) {
-        if ( $discount_id ) {
+    if (wpinv_get_cart_contents()) {
+        if ($discount_id) {
             if (
-                wpinv_is_discount_active( $discount_id ) &&
-                wpinv_check_discount_dates( $discount_id ) &&
-                !wpinv_is_discount_maxed_out( $discount_id ) &&
-                !wpinv_is_discount_used( $code, $user, $discount_id ) &&
-                wpinv_discount_is_min_met( $discount_id ) &&
-                wpinv_discount_is_max_met( $discount_id ) &&
-                wpinv_discount_item_reqs_met( $discount_id )
+                wpinv_is_discount_active($discount_id) &&
+                wpinv_check_discount_dates($discount_id) &&
+                !wpinv_is_discount_maxed_out($discount_id) &&
+                !wpinv_is_discount_used($code, $user, $discount_id) &&
+                wpinv_discount_is_min_met($discount_id) &&
+                wpinv_discount_is_max_met($discount_id) &&
+                wpinv_discount_item_reqs_met($discount_id)
             ) {
                 $return = true;
             }
-        } elseif( $set_error ) {
-            wpinv_set_error( 'wpinv-discount-error', __( 'This discount is invalid.', 'invoicing' ) );
+        } elseif ($set_error) {
+            wpinv_set_error('wpinv-discount-error', __('This discount is invalid.', 'invoicing'));
         }
     }
 
-    return apply_filters( 'wpinv_is_discount_valid', $return, $discount_id, $code, $user );
+    return apply_filters('wpinv_is_discount_valid', $return, $discount_id, $code, $user);
 }
 
-function wpinv_get_discount_id_by_code( $code ) {
-    $discount = wpinv_get_discount_by_code( $code );
-    if( $discount ) {
+function wpinv_get_discount_id_by_code($code) {
+    $discount = wpinv_get_discount_by_code($code);
+    if ($discount) {
         return $discount->ID;
     }
     return false;
 }
 
-function wpinv_get_discounted_amount( $code, $base_price ) {
+function wpinv_get_discounted_amount($code, $base_price) {
     $amount      = $base_price;
-    $discount_id = wpinv_get_discount_id_by_code( $code );
+    $discount_id = wpinv_get_discount_id_by_code($code);
 
-    if( $discount_id ) {
-        $type        = wpinv_get_discount_type( $discount_id );
-        $rate        = wpinv_get_discount_amount( $discount_id );
+    if ($discount_id) {
+        $type        = wpinv_get_discount_type($discount_id);
+        $rate        = wpinv_get_discount_amount($discount_id);
 
-        if ( $type == 'flat' ) {
+        if ($type == 'flat') {
             // Set amount
             $amount = $base_price - $rate;
-            if ( $amount < 0 ) {
+            if ($amount < 0) {
                 $amount = 0;
             }
 
         } else {
             // Percentage discount
-            $amount = $base_price - ( $base_price * ( $rate / 100 ) );
+            $amount = $base_price - ($base_price * ($rate / 100));
         }
 
     } else {
@@ -851,108 +851,108 @@ 
 
     }
 
-    return apply_filters( 'wpinv_discounted_amount', $amount );
+    return apply_filters('wpinv_discounted_amount', $amount);
 }
 
-function wpinv_increase_discount_usage( $code ) {
+function wpinv_increase_discount_usage($code) {
 
-    $id   = wpinv_get_discount_id_by_code( $code );
-    $uses = wpinv_get_discount_uses( $id );
+    $id   = wpinv_get_discount_id_by_code($code);
+    $uses = wpinv_get_discount_uses($id);
 
-    if ( $uses ) {
+    if ($uses) {
         $uses++;
     } else {
         $uses = 1;
     }
 
-    update_post_meta( $id, '_wpi_discount_uses', $uses );
+    update_post_meta($id, '_wpi_discount_uses', $uses);
 
-    do_action( 'wpinv_discount_increase_use_count', $uses, $id, $code );
+    do_action('wpinv_discount_increase_use_count', $uses, $id, $code);
 
     return $uses;
 
 }
 
-function wpinv_decrease_discount_usage( $code ) {
+function wpinv_decrease_discount_usage($code) {
 
-    $id   = wpinv_get_discount_id_by_code( $code );
-    $uses = wpinv_get_discount_uses( $id );
+    $id   = wpinv_get_discount_id_by_code($code);
+    $uses = wpinv_get_discount_uses($id);
 
-    if ( $uses ) {
+    if ($uses) {
         $uses--;
     }
 
-    if ( $uses < 0 ) {
+    if ($uses < 0) {
         $uses = 0;
     }
 
-    update_post_meta( $id, '_wpi_discount_uses', $uses );
+    update_post_meta($id, '_wpi_discount_uses', $uses);
 
-    do_action( 'wpinv_discount_decrease_use_count', $uses, $id, $code );
+    do_action('wpinv_discount_decrease_use_count', $uses, $id, $code);
 
     return $uses;
 
 }
 
-function wpinv_format_discount_rate( $type, $amount ) {
-    if ( $type == 'flat' ) {
-        return wpinv_price( wpinv_format_amount( $amount ) );
+function wpinv_format_discount_rate($type, $amount) {
+    if ($type == 'flat') {
+        return wpinv_price(wpinv_format_amount($amount));
     } else {
         return $amount . '%';
     }
 }
 
-function wpinv_set_cart_discount( $code = '' ) {    
-    if ( wpinv_multiple_discounts_allowed() ) {
+function wpinv_set_cart_discount($code = '') {    
+    if (wpinv_multiple_discounts_allowed()) {
         // Get all active cart discounts
         $discounts = wpinv_get_cart_discounts();
     } else {
         $discounts = false; // Only one discount allowed per purchase, so override any existing
     }
 
-    if ( $discounts ) {
-        $key = array_search( strtolower( $code ), array_map( 'strtolower', $discounts ) );
-        if( false !== $key ) {
-            unset( $discounts[ $key ] ); // Can't set the same discount more than once
+    if ($discounts) {
+        $key = array_search(strtolower($code), array_map('strtolower', $discounts));
+        if (false !== $key) {
+            unset($discounts[$key]); // Can't set the same discount more than once
         }
         $discounts[] = $code;
     } else {
         $discounts = array();
         $discounts[] = $code;
     }
-    $discounts = array_values( $discounts );
+    $discounts = array_values($discounts);
     
     $data = wpinv_get_checkout_session();
-    if ( empty( $data ) ) {
+    if (empty($data)) {
         $data = array();
     } else {
-        if ( !empty( $data['invoice_id'] ) && $payment_meta = wpinv_get_invoice_meta( $data['invoice_id'] ) ) {
-            $payment_meta['user_info']['discount']  = implode( ',', $discounts );
-            update_post_meta( $data['invoice_id'], '_wpinv_payment_meta', $payment_meta );
+        if (!empty($data['invoice_id']) && $payment_meta = wpinv_get_invoice_meta($data['invoice_id'])) {
+            $payment_meta['user_info']['discount'] = implode(',', $discounts);
+            update_post_meta($data['invoice_id'], '_wpinv_payment_meta', $payment_meta);
         }
     }
     $data['cart_discounts'] = $discounts;
     
-    wpinv_set_checkout_session( $data );
+    wpinv_set_checkout_session($data);
     
     return $discounts;
 }
 
-function wpinv_unset_cart_discount( $code = '' ) {    
+function wpinv_unset_cart_discount($code = '') {    
     $discounts = wpinv_get_cart_discounts();
 
-    if ( $code && !empty( $discounts ) && in_array( $code, $discounts ) ) {
-        $key = array_search( $code, $discounts );
-        unset( $discounts[ $key ] );
+    if ($code && !empty($discounts) && in_array($code, $discounts)) {
+        $key = array_search($code, $discounts);
+        unset($discounts[$key]);
             
         $data = wpinv_get_checkout_session();
         $data['cart_discounts'] = $discounts;
-        if ( !empty( $data['invoice_id'] ) && $payment_meta = wpinv_get_invoice_meta( $data['invoice_id'] ) ) {
-            $payment_meta['user_info']['discount']  = !empty( $discounts ) ? implode( ',', $discounts ) : '';
-            update_post_meta( $data['invoice_id'], '_wpinv_payment_meta', $payment_meta );
+        if (!empty($data['invoice_id']) && $payment_meta = wpinv_get_invoice_meta($data['invoice_id'])) {
+            $payment_meta['user_info']['discount'] = !empty($discounts) ? implode(',', $discounts) : '';
+            update_post_meta($data['invoice_id'], '_wpinv_payment_meta', $payment_meta);
         }
         
-        wpinv_set_checkout_session( $data );
+        wpinv_set_checkout_session($data);
     }
 
     return $discounts;
@@ -961,27 +961,27 @@ 
 function wpinv_unset_all_cart_discounts() {
     $data = wpinv_get_checkout_session();
     
-    if ( !empty( $data ) && isset( $data['cart_discounts'] ) ) {
-        unset( $data['cart_discounts'] );
+    if (!empty($data) && isset($data['cart_discounts'])) {
+        unset($data['cart_discounts']);
         
-         wpinv_set_checkout_session( $data );
+         wpinv_set_checkout_session($data);
          return true;
     }
     
     return false;
 }
 
-function wpinv_get_cart_discounts( $items = array() ) {
+function wpinv_get_cart_discounts($items = array()) {
     $session = wpinv_get_checkout_session();
     
-    $discounts = !empty( $session['cart_discounts'] ) ? $session['cart_discounts'] : false;
+    $discounts = !empty($session['cart_discounts']) ? $session['cart_discounts'] : false;
     return $discounts;
 }
 
-function wpinv_cart_has_discounts( $items = array() ) {
+function wpinv_cart_has_discounts($items = array()) {
     $ret = false;
 
-    if ( wpinv_get_cart_discounts( $items ) ) {
+    if (wpinv_get_cart_discounts($items)) {
         $ret = true;
     }
     
@@ -992,131 +992,131 @@ 
     }
     */
 
-    return apply_filters( 'wpinv_cart_has_discounts', $ret );
+    return apply_filters('wpinv_cart_has_discounts', $ret);
 }
 
-function wpinv_get_cart_discounted_amount( $items = array(), $discounts = false ) {
+function wpinv_get_cart_discounted_amount($items = array(), $discounts = false) {
     $amount = 0.00;
-    $items  = !empty( $items ) ? $items : wpinv_get_cart_content_details();
+    $items  = !empty($items) ? $items : wpinv_get_cart_content_details();
 
-    if ( $items ) {
-        $discounts = wp_list_pluck( $items, 'discount' );
+    if ($items) {
+        $discounts = wp_list_pluck($items, 'discount');
 
-        if ( is_array( $discounts ) ) {
-            $discounts = array_map( 'floatval', $discounts );
-            $amount    = array_sum( $discounts );
+        if (is_array($discounts)) {
+            $discounts = array_map('floatval', $discounts);
+            $amount    = array_sum($discounts);
         }
     }
 
-    return apply_filters( 'wpinv_get_cart_discounted_amount', $amount );
+    return apply_filters('wpinv_get_cart_discounted_amount', $amount);
 }
 
-function wpinv_get_cart_items_discount_amount( $items = array(), $discount = false ) {
-    $items  = !empty( $items ) ? $items : wpinv_get_cart_content_details();
+function wpinv_get_cart_items_discount_amount($items = array(), $discount = false) {
+    $items = !empty($items) ? $items : wpinv_get_cart_content_details();
     
-    if ( empty( $discount ) || empty( $items ) ) {
+    if (empty($discount) || empty($items)) {
         return 0;
     }
 
     $amount = 0;
     
-    foreach ( $items as $item ) {
-        $amount += wpinv_get_cart_item_discount_amount( $item, $discount );
+    foreach ($items as $item) {
+        $amount += wpinv_get_cart_item_discount_amount($item, $discount);
     }
     
-    $amount = wpinv_round_amount( $amount );
+    $amount = wpinv_round_amount($amount);
 
     return $amount;
 }
 
-function wpinv_get_cart_item_discount_amount( $item = array(), $discount = false ) {
+function wpinv_get_cart_item_discount_amount($item = array(), $discount = false) {
     global $wpinv_is_last_cart_item, $wpinv_flat_discount_total;
     
     $amount = 0;
 
-    if ( empty( $item ) || empty( $item['id'] ) ) {
+    if (empty($item) || empty($item['id'])) {
         return $amount;
     }
 
-    if ( empty( $item['quantity'] ) ) {
+    if (empty($item['quantity'])) {
         return $amount;
     }
 
-    if ( empty( $item['options'] ) ) {
+    if (empty($item['options'])) {
         $item['options'] = array();
     }
 
-    $price            = wpinv_get_cart_item_price( $item['id'], $item, $item['options'] );
+    $price            = wpinv_get_cart_item_price($item['id'], $item, $item['options']);
     $discounted_price = $price;
 
     $discounts = false === $discount ? wpinv_get_cart_discounts() : $discount;
-    if ( empty( $discounts ) ) {
+    if (empty($discounts)) {
         return $amount;
     }
 
-    if ( $discounts ) {
-        if ( is_array( $discounts ) ) {
-            $discounts = array_values( $discounts );
+    if ($discounts) {
+        if (is_array($discounts)) {
+            $discounts = array_values($discounts);
         } else {
-            $discounts = explode( ',', $discounts );
+            $discounts = explode(',', $discounts);
         }
     }
 
-    if( $discounts ) {
-        foreach ( $discounts as $discount ) {
-            $code_id = wpinv_get_discount_id_by_code( $discount );
+    if ($discounts) {
+        foreach ($discounts as $discount) {
+            $code_id = wpinv_get_discount_id_by_code($discount);
 
             // Check discount exists
-            if( ! $code_id ) {
+            if (!$code_id) {
                 continue;
             }
 
-            $reqs           = wpinv_get_discount_item_reqs( $code_id );
-            $excluded_items = wpinv_get_discount_excluded_items( $code_id );
+            $reqs           = wpinv_get_discount_item_reqs($code_id);
+            $excluded_items = wpinv_get_discount_excluded_items($code_id);
 
             // Make sure requirements are set and that this discount shouldn't apply to the whole cart
-            if ( !empty( $reqs ) && wpinv_is_discount_not_global( $code_id ) ) {
-                foreach ( $reqs as $item_id ) {
-                    if ( $item_id == $item['id'] && ! in_array( $item['id'], $excluded_items ) ) {
-                        $discounted_price -= $price - wpinv_get_discounted_amount( $discount, $price );
+            if (!empty($reqs) && wpinv_is_discount_not_global($code_id)) {
+                foreach ($reqs as $item_id) {
+                    if ($item_id == $item['id'] && !in_array($item['id'], $excluded_items)) {
+                        $discounted_price -= $price - wpinv_get_discounted_amount($discount, $price);
                     }
                 }
             } else {
                 // This is a global cart discount
-                if ( !in_array( $item['id'], $excluded_items ) ) {
-                    if ( 'flat' === wpinv_get_discount_type( $code_id ) ) {
+                if (!in_array($item['id'], $excluded_items)) {
+                    if ('flat' === wpinv_get_discount_type($code_id)) {
                         $items_subtotal    = 0.00;
                         $cart_items        = wpinv_get_cart_contents();
                         
-                        foreach ( $cart_items as $cart_item ) {
-                            if ( ! in_array( $cart_item['id'], $excluded_items ) ) {
-                                $options = !empty( $cart_item['options'] ) ? $cart_item['options'] : array();
-                                $item_price      = wpinv_get_cart_item_price( $cart_item['id'], $cart_item, $options );
+                        foreach ($cart_items as $cart_item) {
+                            if (!in_array($cart_item['id'], $excluded_items)) {
+                                $options = !empty($cart_item['options']) ? $cart_item['options'] : array();
+                                $item_price      = wpinv_get_cart_item_price($cart_item['id'], $cart_item, $options);
                                 $items_subtotal += $item_price * $cart_item['quantity'];
                             }
                         }
 
-                        $subtotal_percent  = ( ( $price * $item['quantity'] ) / $items_subtotal );
-                        $code_amount       = wpinv_get_discount_amount( $code_id );
+                        $subtotal_percent  = (($price * $item['quantity']) / $items_subtotal);
+                        $code_amount       = wpinv_get_discount_amount($code_id);
                         $discounted_amount = $code_amount * $subtotal_percent;
                         $discounted_price -= $discounted_amount;
 
-                        $wpinv_flat_discount_total += round( $discounted_amount, wpinv_currency_decimal_filter() );
+                        $wpinv_flat_discount_total += round($discounted_amount, wpinv_currency_decimal_filter());
 
-                        if ( $wpinv_is_last_cart_item && $wpinv_flat_discount_total < $code_amount ) {
+                        if ($wpinv_is_last_cart_item && $wpinv_flat_discount_total < $code_amount) {
                             $adjustment = $code_amount - $wpinv_flat_discount_total;
                             $discounted_price -= $adjustment;
                         }
                     } else {
-                        $discounted_price -= $price - wpinv_get_discounted_amount( $discount, $price );
+                        $discounted_price -= $price - wpinv_get_discounted_amount($discount, $price);
                     }
                 }
             }
         }
 
-        $amount = ( $price - apply_filters( 'wpinv_get_cart_item_discounted_amount', $discounted_price, $discounts, $item, $price ) );
+        $amount = ($price - apply_filters('wpinv_get_cart_item_discounted_amount', $discounted_price, $discounts, $item, $price));
 
-        if ( 'flat' !== wpinv_get_discount_type( $code_id ) ) {
+        if ('flat' !== wpinv_get_discount_type($code_id)) {
             $amount = $amount * $item['quantity'];
         }
     }
@@ -1124,59 +1124,59 @@ 
     return $amount;
 }
 
-function wpinv_cart_discounts_html( $items = array() ) {
-    echo wpinv_get_cart_discounts_html( $items );
+function wpinv_cart_discounts_html($items = array()) {
+    echo wpinv_get_cart_discounts_html($items);
 }
 
-function wpinv_get_cart_discounts_html( $items = array(), $discounts = false ) {
+function wpinv_get_cart_discounts_html($items = array(), $discounts = false) {
     global $wpi_cart_columns;
     
-    $items  = !empty( $items ) ? $items : wpinv_get_cart_content_details();
+    $items = !empty($items) ? $items : wpinv_get_cart_content_details();
     
-    if ( !$discounts ) {
-        $discounts = wpinv_get_cart_discounts( $items );
+    if (!$discounts) {
+        $discounts = wpinv_get_cart_discounts($items);
     }
 
-    if ( !$discounts ) {
+    if (!$discounts) {
         return;
     }
     
-    $discounts = is_array( $discounts ) ? $discounts : array( $discounts );
+    $discounts = is_array($discounts) ? $discounts : array($discounts);
     
     $html = '';
 
-    foreach ( $discounts as $discount ) {
-        $discount_id    = wpinv_get_discount_id_by_code( $discount );
-        $discount_value = wpinv_get_discount_amount( $discount_id );
-        $rate           = wpinv_format_discount_rate( wpinv_get_discount_type( $discount_id ), $discount_value );
-        $amount         = wpinv_get_cart_items_discount_amount( $items, $discount );
-        $remove_btn     = '<a title="' . esc_attr__( 'Remove discount', 'invoicing' ) . '" data-code="' . $discount . '" data-value="' . $discount_value . '" class="wpi-discount-remove" href="javascript:void(0);">[<i class="fa fa-times" aria-hidden="true"></i>]</a> ';
+    foreach ($discounts as $discount) {
+        $discount_id    = wpinv_get_discount_id_by_code($discount);
+        $discount_value = wpinv_get_discount_amount($discount_id);
+        $rate           = wpinv_format_discount_rate(wpinv_get_discount_type($discount_id), $discount_value);
+        $amount         = wpinv_get_cart_items_discount_amount($items, $discount);
+        $remove_btn     = '<a title="' . esc_attr__('Remove discount', 'invoicing') . '" data-code="' . $discount . '" data-value="' . $discount_value . '" class="wpi-discount-remove" href="javascript:void(0);">[<i class="fa fa-times" aria-hidden="true"></i>]</a> ';
         
         $html .= '<tr class="wpinv_cart_footer_row wpinv_cart_discount_row">';
         ob_start();
-        do_action( 'wpinv_checkout_table_discount_first', $items );
+        do_action('wpinv_checkout_table_discount_first', $items);
         $html .= ob_get_clean();
-        $html .= '<td class="wpinv_cart_discount_label text-right" colspan="' . $wpi_cart_columns . '">' . $remove_btn . '<strong>' . wpinv_cart_discount_label( $discount, $rate, false ) . '</strong></td><td class="wpinv_cart_discount text-right"><span data-discount="' . $amount . '" class="wpinv_cart_discount_amount">&ndash;' . wpinv_price( wpinv_format_amount( $amount ) ) . '</span></td>';
+        $html .= '<td class="wpinv_cart_discount_label text-right" colspan="' . $wpi_cart_columns . '">' . $remove_btn . '<strong>' . wpinv_cart_discount_label($discount, $rate, false) . '</strong></td><td class="wpinv_cart_discount text-right"><span data-discount="' . $amount . '" class="wpinv_cart_discount_amount">&ndash;' . wpinv_price(wpinv_format_amount($amount)) . '</span></td>';
         ob_start();
-        do_action( 'wpinv_checkout_table_discount_last', $items );
+        do_action('wpinv_checkout_table_discount_last', $items);
         $html .= ob_get_clean();
         $html .= '</tr>';
     }
 
-    return apply_filters( 'wpinv_get_cart_discounts_html', $html, $discounts, $rate );
+    return apply_filters('wpinv_get_cart_discounts_html', $html, $discounts, $rate);
 }
 
-function wpinv_display_cart_discount( $formatted = false, $echo = false ) {
+function wpinv_display_cart_discount($formatted = false, $echo = false) {
     $discounts = wpinv_get_cart_discounts();
 
-    if ( empty( $discounts ) ) {
+    if (empty($discounts)) {
         return false;
     }
 
-    $discount_id  = wpinv_get_discount_id_by_code( $discounts[0] );
-    $amount       = wpinv_format_discount_rate( wpinv_get_discount_type( $discount_id ), wpinv_get_discount_amount( $discount_id ) );
+    $discount_id  = wpinv_get_discount_id_by_code($discounts[0]);
+    $amount       = wpinv_format_discount_rate(wpinv_get_discount_type($discount_id), wpinv_get_discount_amount($discount_id));
 
-    if ( $echo ) {
+    if ($echo) {
         echo $amount;
     }
 
@@ -1184,101 +1184,101 @@ 
 }
 
 function wpinv_remove_cart_discount() {
-    if ( !isset( $_GET['discount_id'] ) || ! isset( $_GET['discount_code'] ) ) {
+    if (!isset($_GET['discount_id']) || !isset($_GET['discount_code'])) {
         return;
     }
 
-    do_action( 'wpinv_pre_remove_cart_discount', absint( $_GET['discount_id'] ) );
+    do_action('wpinv_pre_remove_cart_discount', absint($_GET['discount_id']));
 
-    wpinv_unset_cart_discount( urldecode( $_GET['discount_code'] ) );
+    wpinv_unset_cart_discount(urldecode($_GET['discount_code']));
 
-    do_action( 'wpinv_post_remove_cart_discount', absint( $_GET['discount_id'] ) );
+    do_action('wpinv_post_remove_cart_discount', absint($_GET['discount_id']));
 
-    wp_redirect( wpinv_get_checkout_uri() ); wpinv_die();
+    wp_redirect(wpinv_get_checkout_uri()); wpinv_die();
 }
-add_action( 'wpinv_remove_cart_discount', 'wpinv_remove_cart_discount' );
+add_action('wpinv_remove_cart_discount', 'wpinv_remove_cart_discount');
 
-function wpinv_maybe_remove_cart_discount( $cart_key = 0 ) {
+function wpinv_maybe_remove_cart_discount($cart_key = 0) {
     $discounts = wpinv_get_cart_discounts();
 
-    if ( !$discounts ) {
+    if (!$discounts) {
         return;
     }
 
-    foreach ( $discounts as $discount ) {
-        if ( !wpinv_is_discount_valid( $discount ) ) {
-            wpinv_unset_cart_discount( $discount );
+    foreach ($discounts as $discount) {
+        if (!wpinv_is_discount_valid($discount)) {
+            wpinv_unset_cart_discount($discount);
         }
     }
 }
-add_action( 'wpinv_post_remove_from_cart', 'wpinv_maybe_remove_cart_discount' );
+add_action('wpinv_post_remove_from_cart', 'wpinv_maybe_remove_cart_discount');
 
 function wpinv_multiple_discounts_allowed() {
-    $ret = wpinv_get_option( 'allow_multiple_discounts', false );
-    return (bool) apply_filters( 'wpinv_multiple_discounts_allowed', $ret );
+    $ret = wpinv_get_option('allow_multiple_discounts', false);
+    return (bool) apply_filters('wpinv_multiple_discounts_allowed', $ret);
 }
 
-function wpinv_get_discount_label( $code, $echo = true ) {
-    $label = wp_sprintf( __( 'Discount%1$s', 'invoicing' ), ( $code != '' && $code != 'none' ? ' (<code>' . $code . '</code>)': '' ) );
-    $label = apply_filters( 'wpinv_get_discount_label', $label, $code );
+function wpinv_get_discount_label($code, $echo = true) {
+    $label = wp_sprintf(__('Discount%1$s', 'invoicing'), ($code != '' && $code != 'none' ? ' (<code>' . $code . '</code>)' : ''));
+    $label = apply_filters('wpinv_get_discount_label', $label, $code);
 
-    if ( $echo ) {
+    if ($echo) {
         echo $label;
     } else {
         return $label;
     }
 }
 
-function wpinv_cart_discount_label( $code, $rate, $echo = true ) {
-    $label = wp_sprintf( __( 'Discount: %s', 'invoicing' ), $code );
-    $label = apply_filters( 'wpinv_cart_discount_label', $label, $code, $rate );
+function wpinv_cart_discount_label($code, $rate, $echo = true) {
+    $label = wp_sprintf(__('Discount: %s', 'invoicing'), $code);
+    $label = apply_filters('wpinv_cart_discount_label', $label, $code, $rate);
 
-    if ( $echo ) {
+    if ($echo) {
         echo $label;
     } else {
         return $label;
     }
 }
 
-function wpinv_check_delete_discount( $check, $post, $force_delete ) {
-    if ( $post->post_type == 'wpi_discount' && wpinv_get_discount_uses( $post->ID ) > 0 ) {
+function wpinv_check_delete_discount($check, $post, $force_delete) {
+    if ($post->post_type == 'wpi_discount' && wpinv_get_discount_uses($post->ID) > 0) {
         return true;
     }
     
     return $check;
 }
-add_filter( 'pre_delete_post', 'wpinv_check_delete_discount', 10, 3 );
+add_filter('pre_delete_post', 'wpinv_check_delete_discount', 10, 3);
 
 function wpinv_checkout_form_validate_discounts() {
     global $wpi_checkout_id;
     
     $discounts = wpinv_get_cart_discounts();
     
-    if ( !empty( $discounts ) ) {
+    if (!empty($discounts)) {
         $invalid = false;
         
-        foreach ( $discounts as $key => $code ) {
-            if ( !wpinv_is_discount_valid( $code, (int)wpinv_get_user_id( $wpi_checkout_id ) ) ) {
+        foreach ($discounts as $key => $code) {
+            if (!wpinv_is_discount_valid($code, (int) wpinv_get_user_id($wpi_checkout_id))) {
                 $invalid = true;
                 
-                wpinv_unset_cart_discount( $code );
+                wpinv_unset_cart_discount($code);
             }
         }
         
-        if ( $invalid ) {
+        if ($invalid) {
             $errors = wpinv_get_errors();
-            $error  = !empty( $errors['wpinv-discount-error'] ) ? $errors['wpinv-discount-error'] . ' ' : '';
-            $error  .= __( 'The discount has been removed from cart.', 'invoicing' );
-            wpinv_set_error( 'wpinv-discount-error', $error );
+            $error  = !empty($errors['wpinv-discount-error']) ? $errors['wpinv-discount-error'] . ' ' : '';
+            $error .= __('The discount has been removed from cart.', 'invoicing');
+            wpinv_set_error('wpinv-discount-error', $error);
             
-            wpinv_recalculate_tax( true );
+            wpinv_recalculate_tax(true);
         }
     }
 }
-add_action( 'wpinv_before_checkout_form', 'wpinv_checkout_form_validate_discounts', -10 );
+add_action('wpinv_before_checkout_form', 'wpinv_checkout_form_validate_discounts', -10);
 
 function wpinv_discount_amount() {
     $output = 0.00;
     
-    return apply_filters( 'wpinv_discount_amount', $output );
+    return apply_filters('wpinv_discount_amount', $output);
 }
\ No newline at end of file

includes/class-wpinv-api.php

Spacing +11 added lines, -11 removed lines

@@ -7,7 +7,7 @@ 
  */
  
 // MUST have WordPress.
-if ( !defined( 'WPINC' ) ) {
+if (!defined('WPINC')) {
     exit;
 }
 
@@ -19,7 +19,7 @@ 
     /**
      * @param string A prefix for our REST routes
      */
-    public $api_namespace    = '';
+    public $api_namespace = '';
 
     /**
      * @param WPInv_REST_Invoice_Controller Invoices controller
@@ -37,19 +37,19 @@ 
      * @since 1.0.13
      * Sets the API namespace and inits hooks
      */
-    public function __construct( $api_namespace = 'invoicing/v1' ) {
+    public function __construct($api_namespace = 'invoicing/v1') {
 
         // Include controllers and related files
         $this->includes();
 
         // Set up class variables
-        $this->api_namespace       = apply_filters( 'wpinv_rest_api_namespace', $api_namespace );
-        $this->invoices_controller = new WPInv_REST_Invoice_Controller( $this->api_namespace );
-        $this->items_controller    = new WPInv_REST_Items_Controller( $this->api_namespace );
-        $this->discounts_controller= new WPInv_REST_Discounts_Controller( $this->api_namespace );
+        $this->api_namespace       = apply_filters('wpinv_rest_api_namespace', $api_namespace);
+        $this->invoices_controller = new WPInv_REST_Invoice_Controller($this->api_namespace);
+        $this->items_controller    = new WPInv_REST_Items_Controller($this->api_namespace);
+        $this->discounts_controller = new WPInv_REST_Discounts_Controller($this->api_namespace);
 
         //Register REST routes
-        add_action( 'rest_api_init', array( $this, 'register_rest_routes' ) );
+        add_action('rest_api_init', array($this, 'register_rest_routes'));
     }
 
 
@@ -80,13 +80,13 @@ 
     protected function includes() {
         
         // Invoices
-        require_once( WPINV_PLUGIN_DIR . 'includes/api/class-wpinv-rest-invoice-controller.php' );
+        require_once(WPINV_PLUGIN_DIR . 'includes/api/class-wpinv-rest-invoice-controller.php');
 
         // Items
-        require_once( WPINV_PLUGIN_DIR . 'includes/api/class-wpinv-rest-items-controller.php' );
+        require_once(WPINV_PLUGIN_DIR . 'includes/api/class-wpinv-rest-items-controller.php');
 
         // Discounts
-        require_once( WPINV_PLUGIN_DIR . 'includes/api/class-wpinv-rest-discounts-controller.php' );
+        require_once(WPINV_PLUGIN_DIR . 'includes/api/class-wpinv-rest-discounts-controller.php');
 
     }
     

includes/api/class-wpinv-rest-items-controller.php

Indentation +987 added lines, -987 removed lines

@@ -20,91 +20,91 @@ 
 class WPInv_REST_Items_Controller extends WP_REST_Posts_Controller {
 
     /**
-	 * Post type.
-	 *
-	 * @var string
-	 */
-	protected $post_type = 'wpi_item';
+     * Post type.
+     *
+     * @var string
+     */
+    protected $post_type = 'wpi_item';
 	
-	/**
-	 * Cached results of get_item_schema.
-	 *
-	 * @since 1.0.13
-	 * @var array
-	 */
-	protected $schema;
+    /**
+     * Cached results of get_item_schema.
+     *
+     * @since 1.0.13
+     * @var array
+     */
+    protected $schema;
 
     /**
-	 * Constructor.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param string $namespace Api Namespace
-	 */
-	public function __construct( $namespace ) {
+     * Constructor.
+     *
+     * @since 1.0.13
+     *
+     * @param string $namespace Api Namespace
+     */
+    public function __construct( $namespace ) {
         
         // Set api namespace...
-		$this->namespace = $namespace;
+        $this->namespace = $namespace;
 
         // ... and the rest base
         $this->rest_base = 'items';
 		
     }
 	
-	/**
-	 * Registers the routes for the objects of the controller.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @see register_rest_route()
-	 */
-	public function register_routes() {
-
-		parent::register_routes();
-
-		register_rest_route(
-			$this->namespace,
-			'/' . $this->rest_base . '/item-types',
-			array(
-				array(
-					'methods'             => WP_REST_Server::READABLE,
-					'callback'            => array( $this, 'get_item_types' ),
-				),
-			)
-		);
-
-	}
+    /**
+     * Registers the routes for the objects of the controller.
+     *
+     * @since 1.0.13
+     *
+     * @see register_rest_route()
+     */
+    public function register_routes() {
+
+        parent::register_routes();
+
+        register_rest_route(
+            $this->namespace,
+            '/' . $this->rest_base . '/item-types',
+            array(
+                array(
+                    'methods'             => WP_REST_Server::READABLE,
+                    'callback'            => array( $this, 'get_item_types' ),
+                ),
+            )
+        );
+
+    }
 
     /**
-	 * Checks if a given request has access to read items.
+     * Checks if a given request has access to read items.
      * 
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return true|WP_Error True if the request has read access, WP_Error object otherwise.
-	 */
-	public function get_items_permissions_check( $request ) {
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return true|WP_Error True if the request has read access, WP_Error object otherwise.
+     */
+    public function get_items_permissions_check( $request ) {
 	
-		if ( current_user_can( 'manage_options' ) ||  current_user_can( 'manage_invoicing' ) ) {
-			return true;
-		}
+        if ( current_user_can( 'manage_options' ) ||  current_user_can( 'manage_invoicing' ) ) {
+            return true;
+        }
 
-		return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to view invoice items.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+        return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to view invoice items.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
 
     }
     
     /**
-	 * Retrieves a collection of invoice items.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function get_items( $request ) {
+     * Retrieves a collection of invoice items.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function get_items( $request ) {
 		
-		// Retrieve the list of registered item query parameters.
+        // Retrieve the list of registered item query parameters.
         $registered = $this->get_collection_params();
         
         $args       = array();
@@ -117,54 +117,54 @@ 
 
         }
 
-		/**
-		 * Filters the wpinv_get_items arguments for items rest requests.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 *
-		 * @param array           $args    Key value array of query var to query value.
-		 * @param WP_REST_Request $request The request used.
-		 */
+        /**
+         * Filters the wpinv_get_items arguments for items rest requests.
+         *
+         *
+         * @since 1.0.13
+         *
+         *
+         * @param array           $args    Key value array of query var to query value.
+         * @param WP_REST_Request $request The request used.
+         */
         $args       = apply_filters( "wpinv_rest_get_items_arguments", $args, $request, $this );
 		
-		// Special args
-		$args[ 'return' ]   = 'objects';
-		$args[ 'paginate' ] = true;
+        // Special args
+        $args[ 'return' ]   = 'objects';
+        $args[ 'paginate' ] = true;
 
         // Run the query.
-		$query = wpinv_get_all_items( $args );
+        $query = wpinv_get_all_items( $args );
 		
-		// Prepare the retrieved items
-		$items = array();
-		foreach( $query->items as $item ) {
-
-			if ( ! $this->check_read_permission( $item ) ) {
-				continue;
-			}
-
-			$data       = $this->prepare_item_for_response( $item, $request );
-			$items[]    = $this->prepare_response_for_collection( $data );
-
-		}
-
-		// Prepare the response.
-		$response = rest_ensure_response( $items );
-		$response->header( 'X-WP-Total', (int) $query->total );
-		$response->header( 'X-WP-TotalPages', (int) $query->max_num_pages );
-
-		/**
-		 * Filters the responses for item requests.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 *
-		 * @param arrWP_REST_Response $response    Response object.
-		 * @param WP_REST_Request     $request The request used.
+        // Prepare the retrieved items
+        $items = array();
+        foreach( $query->items as $item ) {
+
+            if ( ! $this->check_read_permission( $item ) ) {
+                continue;
+            }
+
+            $data       = $this->prepare_item_for_response( $item, $request );
+            $items[]    = $this->prepare_response_for_collection( $data );
+
+        }
+
+        // Prepare the response.
+        $response = rest_ensure_response( $items );
+        $response->header( 'X-WP-Total', (int) $query->total );
+        $response->header( 'X-WP-TotalPages', (int) $query->max_num_pages );
+
+        /**
+         * Filters the responses for item requests.
+         *
+         *
+         * @since 1.0.13
+         *
+         *
+         * @param arrWP_REST_Response $response    Response object.
+         * @param WP_REST_Request     $request The request used.
          * @param array               $args Array of args used to retrieve the items
-		 */
+         */
         $response       = apply_filters( "wpinv_rest_items_response", $response, $request, $args );
 
         return rest_ensure_response( $response );
@@ -172,25 +172,25 @@ 
     }
 
     /**
-	 * Get the post, if the ID is valid.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param int $item_id Supplied ID.
-	 * @return WPInv_Item|WP_Error Item object if ID is valid, WP_Error otherwise.
-	 */
-	protected function get_post( $item_id ) {
+     * Get the post, if the ID is valid.
+     *
+     * @since 1.0.13
+     *
+     * @param int $item_id Supplied ID.
+     * @return WPInv_Item|WP_Error Item object if ID is valid, WP_Error otherwise.
+     */
+    protected function get_post( $item_id ) {
 		
-		$error     = new WP_Error( 'rest_item_invalid_id', __( 'Invalid item ID.', 'invoicing' ), array( 'status' => 404 ) );
+        $error     = new WP_Error( 'rest_item_invalid_id', __( 'Invalid item ID.', 'invoicing' ), array( 'status' => 404 ) );
 
         // Ids start from 1
         if ( (int) $item_id <= 0 ) {
-			return $error;
-		}
+            return $error;
+        }
 
-		$item = wpinv_get_item_by( 'id', (int) $item_id );
-		if ( empty( $item ) ) {
-			return $error;
+        $item = wpinv_get_item_by( 'id', (int) $item_id );
+        if ( empty( $item ) ) {
+            return $error;
         }
 
         return $item;
@@ -198,27 +198,27 @@ 
     }
 
     /**
-	 * Checks if a given request has access to read an invoice item.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return bool|WP_Error True if the request has read access for the invoice item, WP_Error object otherwise.
-	 */
-	public function get_item_permissions_check( $request ) {
+     * Checks if a given request has access to read an invoice item.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return bool|WP_Error True if the request has read access for the invoice item, WP_Error object otherwise.
+     */
+    public function get_item_permissions_check( $request ) {
 
         // Retrieve the item object.
         $item = $this->get_post( $request['id'] );
         
         // Ensure it is valid.
-		if ( is_wp_error( $item ) ) {
-			return $item;
-		}
+        if ( is_wp_error( $item ) ) {
+            return $item;
+        }
 
-		$post_type = get_post_type_object( $this->post_type );
+        $post_type = get_post_type_object( $this->post_type );
 
-		if ( ! current_user_can(  $post_type->cap->read_post, $item->ID  ) ) {
-			return new WP_Error( 
+        if ( ! current_user_can(  $post_type->cap->read_post, $item->ID  ) ) {
+            return new WP_Error( 
                 'rest_cannot_edit', 
                 __( 'Sorry, you are not allowed to view this item.', 'invoicing' ), 
                 array( 
@@ -227,61 +227,61 @@ 
             );
         }
 
-		return $this->check_read_permission( $item );
+        return $this->check_read_permission( $item );
     }
     
     /**
-	 * Checks if an item can be read.
-	 * 
-	 * An item can be read by site admins.
-	 *
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WPInv_Item $item WPInv_Item object.
-	 * @return bool Whether the post can be read.
-	 */
-	public function check_read_permission( $item ) {
-
-		// An item can be read by an admin...
-		if ( current_user_can( 'manage_options' ) ||  current_user_can( 'manage_invoicing' ) ) {
-			return true;
-		}
-
-		return false;
+     * Checks if an item can be read.
+     * 
+     * An item can be read by site admins.
+     *
+     *
+     * @since 1.0.13
+     *
+     * @param WPInv_Item $item WPInv_Item object.
+     * @return bool Whether the post can be read.
+     */
+    public function check_read_permission( $item ) {
+
+        // An item can be read by an admin...
+        if ( current_user_can( 'manage_options' ) ||  current_user_can( 'manage_invoicing' ) ) {
+            return true;
+        }
+
+        return false;
     }
     
     /**
-	 * Retrieves a single invoice item.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function get_item( $request ) {
+     * Retrieves a single invoice item.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function get_item( $request ) {
 
         // Fetch the item.
         $item = $this->get_post( $request['id'] );
         
         // Abort early if it does not exist
-		if ( is_wp_error( $item ) ) {
-			return $item;
-		}
-
-		// Prepare the response
-		$response = $this->prepare_item_for_response( $item, $request );
-
-		/**
-		 * Filters the responses for single invoice item requests.
-		 *
-		 *
-		 * @since 1.0.13
-		 * @var WP_HTTP_Response
-		 *
-		 * @param WP_HTTP_Response $response Response.
-		 * @param WP_REST_Request  $request The request used.
-		 */
+        if ( is_wp_error( $item ) ) {
+            return $item;
+        }
+
+        // Prepare the response
+        $response = $this->prepare_item_for_response( $item, $request );
+
+        /**
+         * Filters the responses for single invoice item requests.
+         *
+         *
+         * @since 1.0.13
+         * @var WP_HTTP_Response
+         *
+         * @param WP_HTTP_Response $response Response.
+         * @param WP_REST_Request  $request The request used.
+         */
         $response       = apply_filters( "wpinv_rest_get_item_response", $response, $request );
 
         return rest_ensure_response( $response );
@@ -289,26 +289,26 @@ 
     }
     
     /**
-	 * Checks if a given request has access to create an invoice item.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return true|WP_Error True if the request has access to create items, WP_Error object otherwise.
-	 */
-	public function create_item_permissions_check( $request ) {
+     * Checks if a given request has access to create an invoice item.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return true|WP_Error True if the request has access to create items, WP_Error object otherwise.
+     */
+    public function create_item_permissions_check( $request ) {
 	
-		if ( ! empty( $request['id'] ) ) {
-			return new WP_Error( 'rest_item_exists', __( 'Cannot create existing item.', 'invoicing' ), array( 'status' => 400 ) );
-		}
+        if ( ! empty( $request['id'] ) ) {
+            return new WP_Error( 'rest_item_exists', __( 'Cannot create existing item.', 'invoicing' ), array( 'status' => 400 ) );
+        }
 
-		if ( current_user_can( 'manage_options' ) ||  current_user_can( 'manage_invoicing' ) ) {
-			return true;
-		}
+        if ( current_user_can( 'manage_options' ) ||  current_user_can( 'manage_invoicing' ) ) {
+            return true;
+        }
 
-		$post_type = get_post_type_object( $this->post_type );
-		if ( ! current_user_can( $post_type->cap->create_posts ) ) {
-			return new WP_Error( 
+        $post_type = get_post_type_object( $this->post_type );
+        if ( ! current_user_can( $post_type->cap->create_posts ) ) {
+            return new WP_Error( 
                 'rest_cannot_create', 
                 __( 'Sorry, you are not allowed to create invoice items as this user.', 'invoicing' ), 
                 array( 
@@ -317,253 +317,253 @@ 
             );
         }
 
-		return true;
+        return true;
     }
     
     /**
-	 * Creates a single invoice item.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function create_item( $request ) {
-
-		if ( ! empty( $request['id'] ) ) {
-			return new WP_Error( 'rest_item_exists', __( 'Cannot create existing invoice item.', 'invoicing' ), array( 'status' => 400 ) );
-		}
+     * Creates a single invoice item.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function create_item( $request ) {
+
+        if ( ! empty( $request['id'] ) ) {
+            return new WP_Error( 'rest_item_exists', __( 'Cannot create existing invoice item.', 'invoicing' ), array( 'status' => 400 ) );
+        }
 
-		$request->set_param( 'context', 'edit' );
+        $request->set_param( 'context', 'edit' );
 
-		// Prepare the updated data.
-		$item_data = $this->prepare_item_for_database( $request );
+        // Prepare the updated data.
+        $item_data = $this->prepare_item_for_database( $request );
 
-		if ( is_wp_error( $item_data ) ) {
-			return $item_data;
-		}
+        if ( is_wp_error( $item_data ) ) {
+            return $item_data;
+        }
 
-		// Try creating the item.
+        // Try creating the item.
         $item = wpinv_create_item( $item_data, true );
 
-		if ( is_wp_error( $item ) ) {
+        if ( is_wp_error( $item ) ) {
             return $item;
-		}
-
-		// Prepare the response
-		$response = $this->prepare_item_for_response( $item, $request );
-
-		/**
-		 * Fires after a single invoice item is created or updated via the REST API.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param WPinv_Item   $item  Inserted or updated item object.
-		 * @param WP_REST_Request $request  Request object.
-		 * @param bool            $creating True when creating a post, false when updating.
-		 */
-		do_action( "wpinv_rest_insert_item", $item, $request, true );
-
-		/**
-		 * Filters the responses for creating single item requests.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 *
-		 * @param array           $item_data Invoice properties.
-		 * @param WP_REST_Request $request The request used.
-		 */
+        }
+
+        // Prepare the response
+        $response = $this->prepare_item_for_response( $item, $request );
+
+        /**
+         * Fires after a single invoice item is created or updated via the REST API.
+         *
+         * @since 1.0.13
+         *
+         * @param WPinv_Item   $item  Inserted or updated item object.
+         * @param WP_REST_Request $request  Request object.
+         * @param bool            $creating True when creating a post, false when updating.
+         */
+        do_action( "wpinv_rest_insert_item", $item, $request, true );
+
+        /**
+         * Filters the responses for creating single item requests.
+         *
+         *
+         * @since 1.0.13
+         *
+         *
+         * @param array           $item_data Invoice properties.
+         * @param WP_REST_Request $request The request used.
+         */
         $response       = apply_filters( "wpinv_rest_create_item_response", $response, $request );
 
         return rest_ensure_response( $response );
-	}
-
-	/**
-	 * Checks if a given request has access to update an item.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return true|WP_Error True if the request has access to update the item, WP_Error object otherwise.
-	 */
-	public function update_item_permissions_check( $request ) {
-
-		// Retrieve the item.
-		$item = $this->get_post( $request['id'] );
-		if ( is_wp_error( $item ) ) {
-			return $item;
-		}
-
-		if ( wpinv_current_user_can_manage_invoicing() ) {
-			return true;
-		}
-
-		return new WP_Error( 
-			'rest_cannot_edit', 
-			__( 'Sorry, you are not allowed to update this item.', 'invoicing' ), 
-			array( 
-				'status' => rest_authorization_required_code(),
-			)
-		);
-
-	}
-
-	/**
-	 * Updates a single item.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function update_item( $request ) {
+    }
+
+    /**
+     * Checks if a given request has access to update an item.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return true|WP_Error True if the request has access to update the item, WP_Error object otherwise.
+     */
+    public function update_item_permissions_check( $request ) {
+
+        // Retrieve the item.
+        $item = $this->get_post( $request['id'] );
+        if ( is_wp_error( $item ) ) {
+            return $item;
+        }
+
+        if ( wpinv_current_user_can_manage_invoicing() ) {
+            return true;
+        }
+
+        return new WP_Error( 
+            'rest_cannot_edit', 
+            __( 'Sorry, you are not allowed to update this item.', 'invoicing' ), 
+            array( 
+                'status' => rest_authorization_required_code(),
+            )
+        );
+
+    }
+
+    /**
+     * Updates a single item.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function update_item( $request ) {
 		
-		// Ensure the item exists.
+        // Ensure the item exists.
         $valid_check = $this->get_post( $request['id'] );
         
         // Abort early if it does not exist
-		if ( is_wp_error( $valid_check ) ) {
-			return $valid_check;
-		}
+        if ( is_wp_error( $valid_check ) ) {
+            return $valid_check;
+        }
 
-		$request->set_param( 'context', 'edit' );
+        $request->set_param( 'context', 'edit' );
 
-		// Prepare the updated data.
-		$data_to_update = $this->prepare_item_for_database( $request );
+        // Prepare the updated data.
+        $data_to_update = $this->prepare_item_for_database( $request );
 
-		if ( is_wp_error( $data_to_update ) ) {
-			return $data_to_update;
-		}
+        if ( is_wp_error( $data_to_update ) ) {
+            return $data_to_update;
+        }
 
-		// Abort if no item data is provided
+        // Abort if no item data is provided
         if( empty( $data_to_update ) ) {
             return new WP_Error( 'missing_data', __( 'An update request cannot be empty.', 'invoicing' ) );
         }
 
-		// Include the item ID
-		$data_to_update['ID'] = $request['id'];
-
-		// Update the item
-		$updated_item = wpinv_update_item( $data_to_update, true );
-
-		// Incase the update operation failed...
-		if ( is_wp_error( $updated_item ) ) {
-			return $updated_item;
-		}
-
-		// Prepare the response
-		$response = $this->prepare_item_for_response( $updated_item, $request );
-
-		/** This action is documented in includes/class-wpinv-rest-item-controller.php */
-		do_action( "wpinv_rest_insert_item", $updated_item, $request, false );
-
-		/**
-		 * Filters the responses for updating single item requests.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 *
-		 * @param array           $data_to_update Item properties.
-		 * @param WP_REST_Request $request The request used.
-		 */
+        // Include the item ID
+        $data_to_update['ID'] = $request['id'];
+
+        // Update the item
+        $updated_item = wpinv_update_item( $data_to_update, true );
+
+        // Incase the update operation failed...
+        if ( is_wp_error( $updated_item ) ) {
+            return $updated_item;
+        }
+
+        // Prepare the response
+        $response = $this->prepare_item_for_response( $updated_item, $request );
+
+        /** This action is documented in includes/class-wpinv-rest-item-controller.php */
+        do_action( "wpinv_rest_insert_item", $updated_item, $request, false );
+
+        /**
+         * Filters the responses for updating single item requests.
+         *
+         *
+         * @since 1.0.13
+         *
+         *
+         * @param array           $data_to_update Item properties.
+         * @param WP_REST_Request $request The request used.
+         */
         $response       = apply_filters( "wpinv_rest_update_item_response", $response,  $data_to_update, $request );
 
         return rest_ensure_response( $response );
-	}
-
-	/**
-	 * Checks if a given request has access to delete an item.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return true|WP_Error True if the request has access to delete the item, WP_Error object otherwise.
-	 */
-	public function delete_item_permissions_check( $request ) {
-
-		// Retrieve the item.
-		$item = $this->get_post( $request['id'] );
-		if ( is_wp_error( $item ) ) {
-			return $item;
-		}
-
-		// 
-
-		// Ensure the current user can delete the item
-		if (! wpinv_can_delete_item( $request['id'] ) ) {
-			return new WP_Error( 
+    }
+
+    /**
+     * Checks if a given request has access to delete an item.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return true|WP_Error True if the request has access to delete the item, WP_Error object otherwise.
+     */
+    public function delete_item_permissions_check( $request ) {
+
+        // Retrieve the item.
+        $item = $this->get_post( $request['id'] );
+        if ( is_wp_error( $item ) ) {
+            return $item;
+        }
+
+        // 
+
+        // Ensure the current user can delete the item
+        if (! wpinv_can_delete_item( $request['id'] ) ) {
+            return new WP_Error( 
                 'rest_cannot_delete', 
                 __( 'Sorry, you are not allowed to delete this item.', 'invoicing' ), 
                 array( 
                     'status' => rest_authorization_required_code(),
                 )
             );
-		}
-
-		return true;
-	}
-
-	/**
-	 * Deletes a single item.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function delete_item( $request ) {
+        }
+
+        return true;
+    }
+
+    /**
+     * Deletes a single item.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function delete_item( $request ) {
 		
-		// Retrieve the item.
-		$item = $this->get_post( $request['id'] );
-		if ( is_wp_error( $item ) ) {
-			return $item;
-		}
+        // Retrieve the item.
+        $item = $this->get_post( $request['id'] );
+        if ( is_wp_error( $item ) ) {
+            return $item;
+        }
 
-		$request->set_param( 'context', 'edit' );
+        $request->set_param( 'context', 'edit' );
 
-		// Prepare the item id
-		$id    = $item->ID;
+        // Prepare the item id
+        $id    = $item->ID;
 
-		// Prepare the response
-		$response = $this->prepare_item_for_response( $item, $request );
+        // Prepare the response
+        $response = $this->prepare_item_for_response( $item, $request );
 
-		// Check if the user wants to bypass the trash...
-		$force_delete = (bool) $request['force'];
+        // Check if the user wants to bypass the trash...
+        $force_delete = (bool) $request['force'];
 
-		// Try deleting the item.
-		$deleted = wp_delete_post( $id, $force_delete );
+        // Try deleting the item.
+        $deleted = wp_delete_post( $id, $force_delete );
 
-		// Abort early if we can't delete the item.
-		if ( ! $deleted ) {
-			return new WP_Error( 'rest_cannot_delete', __( 'The item cannot be deleted.', 'invoicing' ), array( 'status' => 500 ) );
-		}
+        // Abort early if we can't delete the item.
+        if ( ! $deleted ) {
+            return new WP_Error( 'rest_cannot_delete', __( 'The item cannot be deleted.', 'invoicing' ), array( 'status' => 500 ) );
+        }
 
-		/**
-		 * Fires immediately after a single item is deleted or trashed via the REST API.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param WPInv_Item    $item  The deleted or trashed item.
-		 * @param WP_REST_Request  $request  The request sent to the API.
-		 */
-		do_action( "wpinv_rest_delete_item", $item, $request );
+        /**
+         * Fires immediately after a single item is deleted or trashed via the REST API.
+         *
+         *
+         * @since 1.0.13
+         *
+         * @param WPInv_Item    $item  The deleted or trashed item.
+         * @param WP_REST_Request  $request  The request sent to the API.
+         */
+        do_action( "wpinv_rest_delete_item", $item, $request );
 
-		return $response;
+        return $response;
 
-	}
+    }
     
     
     /**
-	 * Retrieves the query params for the items collection.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @return array Collection parameters.
-	 */
-	public function get_collection_params() {
+     * Retrieves the query params for the items collection.
+     *
+     * @since 1.0.13
+     *
+     * @return array Collection parameters.
+     */
+    public function get_collection_params() {
         
         $query_params               = array(
 
@@ -577,27 +577,27 @@ 
             
             // Item types
             'type'                  => array(
-				'description'       => __( 'Type of items to fetch.', 'invoicing' ),
-				'type'              => 'array',
-				'default'           => wpinv_item_types(),
-				'items'             => array(
+                'description'       => __( 'Type of items to fetch.', 'invoicing' ),
+                'type'              => 'array',
+                'default'           => wpinv_item_types(),
+                'items'             => array(
                     'enum'          => wpinv_item_types(),
                     'type'          => 'string',
                 ),
-			),
+            ),
 			
-			// Number of results per page
+            // Number of results per page
             'limit'                 => array(
-				'description'       => __( 'Number of items to fetch.', 'invoicing' ),
-				'type'              => 'integer',
-				'default'           => (int) get_option( 'posts_per_page' ),
+                'description'       => __( 'Number of items to fetch.', 'invoicing' ),
+                'type'              => 'integer',
+                'default'           => (int) get_option( 'posts_per_page' ),
             ),
 
             // Pagination
             'page'     => array(
-				'description'       => __( 'Current page to fetch.', 'invoicing' ),
-				'type'              => 'integer',
-				'default'           => 1,
+                'description'       => __( 'Current page to fetch.', 'invoicing' ),
+                'type'              => 'integer',
+                'default'           => 1,
             ),
 
             // Exclude certain items
@@ -620,9 +620,9 @@ 
                     'date',
                     'ID',
                     'modified',
-					'title',
-					'relevance',
-					'rand'
+                    'title',
+                    'relevance',
+                    'rand'
                 ),
             ),
 
@@ -632,617 +632,617 @@ 
                 'type'        => 'string',
                 'default'     => 'DESC',
                 'enum'        => array( 'ASC', 'DESC' ),
-			),
+            ),
 			
-			// Search term
+            // Search term
             'search'                => array(
-				'description'       => __( 'Return items that match the search term.', 'invoicing' ),
-				'type'              => 'string',
+                'description'       => __( 'Return items that match the search term.', 'invoicing' ),
+                'type'              => 'string',
             ),
         );
 
-		/**
-		 * Filter collection parameters for the items controller.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param array        $query_params JSON Schema-formatted collection parameters.
-		 */
-		return apply_filters( "wpinv_rest_items_collection_params", $query_params );
+        /**
+         * Filter collection parameters for the items controller.
+         *
+         *
+         * @since 1.0.13
+         *
+         * @param array        $query_params JSON Schema-formatted collection parameters.
+         */
+        return apply_filters( "wpinv_rest_items_collection_params", $query_params );
     }
     
     /**
-	 * Checks if a given post type can be viewed or managed.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param object|string $post_type Post type name or object.
-	 * @return bool Whether the post type is allowed in REST.
-	 */
-	protected function check_is_post_type_allowed( $post_type ) {
-		return true;
-	}
-
-	/**
-	 * Prepares a single item for create or update.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Request object.
-	 * @return array|WP_Error Invoice Properties or WP_Error.
-	 */
-	protected function prepare_item_for_database( $request ) {
-		$prepared_item = new stdClass();
-
-		// Post ID.
-		if ( isset( $request['id'] ) ) {
-			$existing_item = $this->get_post( $request['id'] );
-			if ( is_wp_error( $existing_item ) ) {
-				return $existing_item;
-			}
-
-			$prepared_item->ID 		  = $existing_item->ID;
-		}
-
-		$schema = $this->get_item_schema();
-
-		// item title.
-		if ( ! empty( $schema['properties']['name'] ) && isset( $request['name'] ) ) {
-			$prepared_item->title = sanitize_text_field( $request['name'] );
-		}
-
-		// item summary.
-		if ( ! empty( $schema['properties']['summary'] ) && isset( $request['summary'] ) ) {
-			$prepared_item->excerpt = wp_kses_post( $request['summary'] );
-		}
-
-		// item price.
-		if ( ! empty( $schema['properties']['price'] ) && isset( $request['price'] ) ) {
-			$prepared_item->price = floatval( $request['price'] );
-		}
-
-		// minimum price (for dynamc items).
-		if ( ! empty( $schema['properties']['minimum_price'] ) && isset( $request['minimum_price'] ) ) {
-			$prepared_item->minimum_price = floatval( $request['minimum_price'] );
-		}
-
-		// item status.
-		if ( ! empty( $schema['properties']['status'] ) && isset( $request['status'] ) ) {
-			$prepared_item->status = 'publish' === $request['status'] ? 'publish' : 'pending';
-		}
-
-		// item type.
-		if ( ! empty( $schema['properties']['type'] ) && isset( $request['type'] ) ) {
-			$prepared_item->type = in_array( $request['type'], wpinv_item_types() ) ? trim( strtolower( $request['type'] ) ) : 'custom';
-		}
-
-		// VAT rule.
-		if ( ! empty( $schema['properties']['vat_rule'] ) && isset( $request['vat_rule'] ) ) {
-			$prepared_item->vat_rule = 'digital' === $request['vat_rule'] ? 'digital' : 'physical';
-		}
-
-		// Simple strings.
-		foreach( array( 'custom_id', 'custom_name', 'custom_singular_name' ) as $property ) {
-
-			if ( ! empty( $schema['properties'][$property] ) && isset( $request[$property] ) ) {
-				$prepared_item->$property = sanitize_text_field( $request[$property] );
-			}
-
-		}
-
-		// Simple integers.
-		foreach( array( 'is_recurring', 'recurring_interval', 'recurring_limit', 'free_trial', 'trial_interval', 'dynamic_pricing', 'editable' ) as $property ) {
-
-			if ( ! empty( $schema['properties'][$property] ) && isset( $request[$property] ) ) {
-				$prepared_item->$property = intval( $request[$property] );
-			}
-
-		}
-
-		// Time periods.
-		foreach( array( 'recurring_period',  'trial_period' ) as $property ) {
-
-			if ( ! empty( $schema['properties'][$property] ) && isset( $request[$property] ) ) {
-				$prepared_item->$property = in_array( $request[$property], array( 'D', 'W', 'M', 'Y' ) ) ? trim( strtoupper( $request[$property] ) ) : 'D';
-			}
-
-		}
-
-		$item_data = (array) wp_unslash( $prepared_item );
-
-		/**
-		 * Filters an item before it is inserted via the REST API.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param array        $item_data An array of item data
-		 * @param WP_REST_Request $request       Request object.
-		 */
-		return apply_filters( "wpinv_rest_pre_insert_item", $item_data, $request );
-
-	}
-
-	/**
-	 * Prepares a single item output for response.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WPInv_Item   $item    item object.
-	 * @param WP_REST_Request $request Request object.
-	 * @return WP_REST_Response Response object.
-	 */
-	public function prepare_item_for_response( $item, $request ) {
+     * Checks if a given post type can be viewed or managed.
+     *
+     * @since 1.0.13
+     *
+     * @param object|string $post_type Post type name or object.
+     * @return bool Whether the post type is allowed in REST.
+     */
+    protected function check_is_post_type_allowed( $post_type ) {
+        return true;
+    }
 
-		$GLOBALS['post'] = get_post( $item->get_ID() );
+    /**
+     * Prepares a single item for create or update.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Request object.
+     * @return array|WP_Error Invoice Properties or WP_Error.
+     */
+    protected function prepare_item_for_database( $request ) {
+        $prepared_item = new stdClass();
+
+        // Post ID.
+        if ( isset( $request['id'] ) ) {
+            $existing_item = $this->get_post( $request['id'] );
+            if ( is_wp_error( $existing_item ) ) {
+                return $existing_item;
+            }
 
-		setup_postdata( $item->get_ID() );
+            $prepared_item->ID 		  = $existing_item->ID;
+        }
 
-		// Fetch the fields to include in this response.
-		$fields = $this->get_fields_for_response( $request );
+        $schema = $this->get_item_schema();
 
-		// Base fields for every item.
-		$data = array();
+        // item title.
+        if ( ! empty( $schema['properties']['name'] ) && isset( $request['name'] ) ) {
+            $prepared_item->title = sanitize_text_field( $request['name'] );
+        }
 
-		// Set up ID
-		if ( rest_is_field_included( 'id', $fields ) ) {
-			$data['id'] = $item->get_ID();
-		}
+        // item summary.
+        if ( ! empty( $schema['properties']['summary'] ) && isset( $request['summary'] ) ) {
+            $prepared_item->excerpt = wp_kses_post( $request['summary'] );
+        }
 
+        // item price.
+        if ( ! empty( $schema['properties']['price'] ) && isset( $request['price'] ) ) {
+            $prepared_item->price = floatval( $request['price'] );
+        }
 
-		// Item properties
-		$item_properties = array(
-			'name', 'summary', 'price', 'status', 'type',
-			'vat_rule', 'vat_class',
-			'custom_id', 'custom_name', 'custom_singular_name', 
-			'editable'
-		);
+        // minimum price (for dynamc items).
+        if ( ! empty( $schema['properties']['minimum_price'] ) && isset( $request['minimum_price'] ) ) {
+            $prepared_item->minimum_price = floatval( $request['minimum_price'] );
+        }
+
+        // item status.
+        if ( ! empty( $schema['properties']['status'] ) && isset( $request['status'] ) ) {
+            $prepared_item->status = 'publish' === $request['status'] ? 'publish' : 'pending';
+        }
 
-		foreach( $item_properties as $property ) {
+        // item type.
+        if ( ! empty( $schema['properties']['type'] ) && isset( $request['type'] ) ) {
+            $prepared_item->type = in_array( $request['type'], wpinv_item_types() ) ? trim( strtolower( $request['type'] ) ) : 'custom';
+        }
 
-			if ( rest_is_field_included( $property, $fields ) && method_exists( $item, 'get_' . $property ) ) {
-				$data[$property] = call_user_func( array( $item, 'get_' . $property ) );
-			}
+        // VAT rule.
+        if ( ! empty( $schema['properties']['vat_rule'] ) && isset( $request['vat_rule'] ) ) {
+            $prepared_item->vat_rule = 'digital' === $request['vat_rule'] ? 'digital' : 'physical';
+        }
 
-		}
+        // Simple strings.
+        foreach( array( 'custom_id', 'custom_name', 'custom_singular_name' ) as $property ) {
 
-		// Dynamic pricing.
-		if( $item->supports_dynamic_pricing() ) {
+            if ( ! empty( $schema['properties'][$property] ) && isset( $request[$property] ) ) {
+                $prepared_item->$property = sanitize_text_field( $request[$property] );
+            }
 
-			if( rest_is_field_included( 'dynamic_pricing', $fields ) ) {
-				$data['dynamic_pricing'] = $item->get_is_dynamic_pricing();
-			}
+        }
 
-			if( rest_is_field_included( 'minimum_price', $fields ) ) {
-				$data['minimum_price'] = $item->get_minimum_price();
-			}
-		}
+        // Simple integers.
+        foreach( array( 'is_recurring', 'recurring_interval', 'recurring_limit', 'free_trial', 'trial_interval', 'dynamic_pricing', 'editable' ) as $property ) {
 
-		// Subscriptions.
-		if( rest_is_field_included( 'is_recurring', $fields ) ) {
-			$data['is_recurring'] = $item->get_is_recurring();
-		}
+            if ( ! empty( $schema['properties'][$property] ) && isset( $request[$property] ) ) {
+                $prepared_item->$property = intval( $request[$property] );
+            }
 
-		if( $item->is_recurring() ) {
+        }
 
-			$recurring_fields = array( 'is_recurring', 'recurring_period', 'recurring_interval', 'recurring_limit', 'free_trial' );
-			foreach( $recurring_fields as $field ) {
+        // Time periods.
+        foreach( array( 'recurring_period',  'trial_period' ) as $property ) {
 
-				if ( rest_is_field_included( $field, $fields ) && method_exists( $item, 'get_' . $field ) ) {
-					$data[$field] = call_user_func( array( $item, 'get_' . $field ) );
-				}
+            if ( ! empty( $schema['properties'][$property] ) && isset( $request[$property] ) ) {
+                $prepared_item->$property = in_array( $request[$property], array( 'D', 'W', 'M', 'Y' ) ) ? trim( strtoupper( $request[$property] ) ) : 'D';
+            }
+
+        }
+
+        $item_data = (array) wp_unslash( $prepared_item );
+
+        /**
+         * Filters an item before it is inserted via the REST API.
+         *
+         * @since 1.0.13
+         *
+         * @param array        $item_data An array of item data
+         * @param WP_REST_Request $request       Request object.
+         */
+        return apply_filters( "wpinv_rest_pre_insert_item", $item_data, $request );
+
+    }
+
+    /**
+     * Prepares a single item output for response.
+     *
+     * @since 1.0.13
+     *
+     * @param WPInv_Item   $item    item object.
+     * @param WP_REST_Request $request Request object.
+     * @return WP_REST_Response Response object.
+     */
+    public function prepare_item_for_response( $item, $request ) {
+
+        $GLOBALS['post'] = get_post( $item->get_ID() );
+
+        setup_postdata( $item->get_ID() );
+
+        // Fetch the fields to include in this response.
+        $fields = $this->get_fields_for_response( $request );
+
+        // Base fields for every item.
+        $data = array();
+
+        // Set up ID
+        if ( rest_is_field_included( 'id', $fields ) ) {
+            $data['id'] = $item->get_ID();
+        }
+
+
+        // Item properties
+        $item_properties = array(
+            'name', 'summary', 'price', 'status', 'type',
+            'vat_rule', 'vat_class',
+            'custom_id', 'custom_name', 'custom_singular_name', 
+            'editable'
+        );
+
+        foreach( $item_properties as $property ) {
+
+            if ( rest_is_field_included( $property, $fields ) && method_exists( $item, 'get_' . $property ) ) {
+                $data[$property] = call_user_func( array( $item, 'get_' . $property ) );
+            }
+
+        }
+
+        // Dynamic pricing.
+        if( $item->supports_dynamic_pricing() ) {
+
+            if( rest_is_field_included( 'dynamic_pricing', $fields ) ) {
+                $data['dynamic_pricing'] = $item->get_is_dynamic_pricing();
+            }
+
+            if( rest_is_field_included( 'minimum_price', $fields ) ) {
+                $data['minimum_price'] = $item->get_minimum_price();
+            }
+        }
+
+        // Subscriptions.
+        if( rest_is_field_included( 'is_recurring', $fields ) ) {
+            $data['is_recurring'] = $item->get_is_recurring();
+        }
+
+        if( $item->is_recurring() ) {
+
+            $recurring_fields = array( 'is_recurring', 'recurring_period', 'recurring_interval', 'recurring_limit', 'free_trial' );
+            foreach( $recurring_fields as $field ) {
+
+                if ( rest_is_field_included( $field, $fields ) && method_exists( $item, 'get_' . $field ) ) {
+                    $data[$field] = call_user_func( array( $item, 'get_' . $field ) );
+                }
 	
-			}
+            }
 
-			if( $item->has_free_trial() ) {
+            if( $item->has_free_trial() ) {
 
-				$trial_fields = array( 'trial_period', 'trial_interval' );
-				foreach( $trial_fields as $field ) {
+                $trial_fields = array( 'trial_period', 'trial_interval' );
+                foreach( $trial_fields as $field ) {
 
-					if ( rest_is_field_included( $field, $fields ) && method_exists( $item, 'get_' . $field ) ) {
-						$data[$field] = call_user_func( array( $item, 'get_' . $field ) );
-					}
+                    if ( rest_is_field_included( $field, $fields ) && method_exists( $item, 'get_' . $field ) ) {
+                        $data[$field] = call_user_func( array( $item, 'get_' . $field ) );
+                    }
 	
-				}
-
-			}
-
-		}
-
-		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
-		$data    = $this->add_additional_fields_to_object( $data, $request );
-		$data    = $this->filter_response_by_context( $data, $context );
-
-		// Wrap the data in a response object.
-		$response = rest_ensure_response( $data );
-
-		$links = $this->prepare_links( $item );
-		$response->add_links( $links );
-
-		if ( ! empty( $links['self']['href'] ) ) {
-			$actions = $this->get_available_actions( $item, $request );
-
-			$self = $links['self']['href'];
-
-			foreach ( $actions as $rel ) {
-				$response->add_link( $rel, $self );
-			}
-		}
-
-		/**
-		 * Filters the item data for a response.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param WP_REST_Response $response The response object.
-		 * @param WPInv_Item    $item  The item object.
-		 * @param WP_REST_Request  $request  Request object.
-		 */
-		return apply_filters( "wpinv_rest_prepare_item", $response, $item, $request );
-	}
-
-	/**
-	 * Gets an array of fields to be included on the response.
-	 *
-	 * Included fields are based on item schema and `_fields=` request argument.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return array Fields to be included in the response.
-	 */
-	public function get_fields_for_response( $request ) {
-		$schema     = $this->get_item_schema();
-		$properties = isset( $schema['properties'] ) ? $schema['properties'] : array();
-
-		$additional_fields = $this->get_additional_fields();
-		foreach ( $additional_fields as $field_name => $field_options ) {
-			// For back-compat, include any field with an empty schema
-			// because it won't be present in $this->get_item_schema().
-			if ( is_null( $field_options['schema'] ) ) {
-				$properties[ $field_name ] = $field_options;
-			}
-		}
-
-		// Exclude fields that specify a different context than the request context.
-		$context = $request['context'];
-		if ( $context ) {
-			foreach ( $properties as $name => $options ) {
-				if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) {
-					unset( $properties[ $name ] );
-				}
-			}
-		}
-
-		$fields = array_keys( $properties );
-
-		if ( ! isset( $request['_fields'] ) ) {
-			return $fields;
-		}
-		$requested_fields = wpinv_parse_list( $request['_fields'] );
-		if ( 0 === count( $requested_fields ) ) {
-			return $fields;
-		}
-		// Trim off outside whitespace from the comma delimited list.
-		$requested_fields = array_map( 'trim', $requested_fields );
-		// Always persist 'id', because it can be needed for add_additional_fields_to_object().
-		if ( in_array( 'id', $fields, true ) ) {
-			$requested_fields[] = 'id';
-		}
-		// Return the list of all requested fields which appear in the schema.
-		return array_reduce(
-			$requested_fields,
-			function( $response_fields, $field ) use ( $fields ) {
-				if ( in_array( $field, $fields, true ) ) {
-					$response_fields[] = $field;
-					return $response_fields;
-				}
-				// Check for nested fields if $field is not a direct match.
-				$nested_fields = explode( '.', $field );
-				// A nested field is included so long as its top-level property is
-				// present in the schema.
-				if ( in_array( $nested_fields[0], $fields, true ) ) {
-					$response_fields[] = $field;
-				}
-				return $response_fields;
-			},
-			array()
-		);
-	}
-
-	/**
-	 * Retrieves the item's schema, conforming to JSON Schema.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @return array Item schema data.
-	 */
-	public function get_item_schema() {
-
-		// Maybe retrieve the schema from cache.
-		if ( $this->schema ) {
-			return $this->add_additional_fields_schema( $this->schema );
-		}
-
-		$schema = array(
-			'$schema'    => 'http://json-schema.org/draft-04/schema#',
-			'title'      => $this->post_type,
-			'type'       => 'object',
-
-			// Base properties for every Item.
-			'properties' 		  => array(
-
-				'id'           => array(
-					'description' => __( 'Unique identifier for the item.', 'invoicing' ),
-					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
-					'readonly'    => true,
-				),
-
-				'name'			  => array(
-					'description' => __( 'The name for the item.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'summary'        => array(
-					'description' => __( 'A summary for the item.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'price'        => array(
-					'description' => __( 'The price for the item.', 'invoicing' ),
-					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'status'       => array(
-					'description' => __( 'A named status for the item.', 'invoicing' ),
-					'type'        => 'string',
-					'enum'        => array_keys( get_post_stati( array( 'internal' => false ) ) ),
-					'context'     => array( 'view', 'edit' ),
-				),
-
-				'type'       => array(
-					'description' => __( 'The item type.', 'invoicing' ),
-					'type'        => 'string',
-					'enum'        => wpinv_item_types(),
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'vat_rule'       => array(
-					'description' => __( 'VAT rule applied to the item.', 'invoicing' ),
-					'type'        => 'string',
-					'enum'        => array( 'digital', 'physical' ),
-					'context'     => array( 'view', 'edit' ),
-				),
-
-				'vat_class'       => array(
-					'description' => __( 'VAT class for the item.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit' ),
-					'readonly'    => true,
-				),
-
-				'custom_id'       => array(
-					'description' => __( 'Custom id for the item.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
+                }
+
+            }
+
+        }
+
+        $context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+        $data    = $this->add_additional_fields_to_object( $data, $request );
+        $data    = $this->filter_response_by_context( $data, $context );
+
+        // Wrap the data in a response object.
+        $response = rest_ensure_response( $data );
+
+        $links = $this->prepare_links( $item );
+        $response->add_links( $links );
+
+        if ( ! empty( $links['self']['href'] ) ) {
+            $actions = $this->get_available_actions( $item, $request );
+
+            $self = $links['self']['href'];
+
+            foreach ( $actions as $rel ) {
+                $response->add_link( $rel, $self );
+            }
+        }
+
+        /**
+         * Filters the item data for a response.
+         *
+         * @since 1.0.13
+         *
+         * @param WP_REST_Response $response The response object.
+         * @param WPInv_Item    $item  The item object.
+         * @param WP_REST_Request  $request  Request object.
+         */
+        return apply_filters( "wpinv_rest_prepare_item", $response, $item, $request );
+    }
+
+    /**
+     * Gets an array of fields to be included on the response.
+     *
+     * Included fields are based on item schema and `_fields=` request argument.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return array Fields to be included in the response.
+     */
+    public function get_fields_for_response( $request ) {
+        $schema     = $this->get_item_schema();
+        $properties = isset( $schema['properties'] ) ? $schema['properties'] : array();
+
+        $additional_fields = $this->get_additional_fields();
+        foreach ( $additional_fields as $field_name => $field_options ) {
+            // For back-compat, include any field with an empty schema
+            // because it won't be present in $this->get_item_schema().
+            if ( is_null( $field_options['schema'] ) ) {
+                $properties[ $field_name ] = $field_options;
+            }
+        }
+
+        // Exclude fields that specify a different context than the request context.
+        $context = $request['context'];
+        if ( $context ) {
+            foreach ( $properties as $name => $options ) {
+                if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) {
+                    unset( $properties[ $name ] );
+                }
+            }
+        }
+
+        $fields = array_keys( $properties );
+
+        if ( ! isset( $request['_fields'] ) ) {
+            return $fields;
+        }
+        $requested_fields = wpinv_parse_list( $request['_fields'] );
+        if ( 0 === count( $requested_fields ) ) {
+            return $fields;
+        }
+        // Trim off outside whitespace from the comma delimited list.
+        $requested_fields = array_map( 'trim', $requested_fields );
+        // Always persist 'id', because it can be needed for add_additional_fields_to_object().
+        if ( in_array( 'id', $fields, true ) ) {
+            $requested_fields[] = 'id';
+        }
+        // Return the list of all requested fields which appear in the schema.
+        return array_reduce(
+            $requested_fields,
+            function( $response_fields, $field ) use ( $fields ) {
+                if ( in_array( $field, $fields, true ) ) {
+                    $response_fields[] = $field;
+                    return $response_fields;
+                }
+                // Check for nested fields if $field is not a direct match.
+                $nested_fields = explode( '.', $field );
+                // A nested field is included so long as its top-level property is
+                // present in the schema.
+                if ( in_array( $nested_fields[0], $fields, true ) ) {
+                    $response_fields[] = $field;
+                }
+                return $response_fields;
+            },
+            array()
+        );
+    }
+
+    /**
+     * Retrieves the item's schema, conforming to JSON Schema.
+     *
+     * @since 1.0.13
+     *
+     * @return array Item schema data.
+     */
+    public function get_item_schema() {
+
+        // Maybe retrieve the schema from cache.
+        if ( $this->schema ) {
+            return $this->add_additional_fields_schema( $this->schema );
+        }
+
+        $schema = array(
+            '$schema'    => 'http://json-schema.org/draft-04/schema#',
+            'title'      => $this->post_type,
+            'type'       => 'object',
+
+            // Base properties for every Item.
+            'properties' 		  => array(
+
+                'id'           => array(
+                    'description' => __( 'Unique identifier for the item.', 'invoicing' ),
+                    'type'        => 'integer',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                    'readonly'    => true,
+                ),
+
+                'name'			  => array(
+                    'description' => __( 'The name for the item.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'summary'        => array(
+                    'description' => __( 'A summary for the item.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'price'        => array(
+                    'description' => __( 'The price for the item.', 'invoicing' ),
+                    'type'        => 'number',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'status'       => array(
+                    'description' => __( 'A named status for the item.', 'invoicing' ),
+                    'type'        => 'string',
+                    'enum'        => array_keys( get_post_stati( array( 'internal' => false ) ) ),
+                    'context'     => array( 'view', 'edit' ),
+                ),
+
+                'type'       => array(
+                    'description' => __( 'The item type.', 'invoicing' ),
+                    'type'        => 'string',
+                    'enum'        => wpinv_item_types(),
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'vat_rule'       => array(
+                    'description' => __( 'VAT rule applied to the item.', 'invoicing' ),
+                    'type'        => 'string',
+                    'enum'        => array( 'digital', 'physical' ),
+                    'context'     => array( 'view', 'edit' ),
+                ),
+
+                'vat_class'       => array(
+                    'description' => __( 'VAT class for the item.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit' ),
+                    'readonly'    => true,
+                ),
+
+                'custom_id'       => array(
+                    'description' => __( 'Custom id for the item.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
 				
-				'custom_name'       => array(
-					'description' => __( 'Custom name for the item.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'custom_singular_name'       => array(
-					'description' => __( 'Custom singular name for the item.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'dynamic_pricing'        => array(
-					'description' => __( 'Whether the item allows a user to set their own price.', 'invoicing' ),
-					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'minimum_price'        => array(
-					'description' => __( 'For dynamic prices, this is the minimum price that a user can set.', 'invoicing' ),
-					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'is_recurring'        => array(
-					'description' => __( 'Whether the item is a subscription item.', 'invoicing' ),
-					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'recurring_period'        => array(
-					'description' => __( 'The recurring period for a recurring item.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
-					'enum'        => array( 'D', 'W', 'M', 'Y' ),
-				),
-
-				'recurring_interval'        => array(
-					'description' => __( 'The recurring interval for a subscription item.', 'invoicing' ),
-					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'recurring_limit'        => array(
-					'description' => __( 'The maximum number of renewals for a subscription item.', 'invoicing' ),
-					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'free_trial'        => array(
-					'description' => __( 'Whether the item has a free trial period.', 'invoicing' ),
-					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'trial_period'        => array(
-					'description' => __( 'The trial period of a recurring item.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
-					'enum'        => array( 'D', 'W', 'M', 'Y' ),
-				),
-
-				'trial_interval'        => array(
-					'description' => __( 'The trial interval for a subscription item.', 'invoicing' ),
-					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'editable'        => array(
-					'description' => __( 'Whether or not the item is editable.', 'invoicing' ),
-					'type'        => 'integer',
-					'context'     => array( 'view', 'edit' ),
-				),
-
-			),
-		);
-
-		// Add helpful links to the item schem.
-		$schema['links'] = $this->get_schema_links();
-
-		/**
-		 * Filters the item schema for the REST API.
-		 *
-		 * Enables adding extra properties to items.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param array   $schema    The item schema.
-		 */
+                'custom_name'       => array(
+                    'description' => __( 'Custom name for the item.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'custom_singular_name'       => array(
+                    'description' => __( 'Custom singular name for the item.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'dynamic_pricing'        => array(
+                    'description' => __( 'Whether the item allows a user to set their own price.', 'invoicing' ),
+                    'type'        => 'integer',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'minimum_price'        => array(
+                    'description' => __( 'For dynamic prices, this is the minimum price that a user can set.', 'invoicing' ),
+                    'type'        => 'number',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'is_recurring'        => array(
+                    'description' => __( 'Whether the item is a subscription item.', 'invoicing' ),
+                    'type'        => 'integer',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'recurring_period'        => array(
+                    'description' => __( 'The recurring period for a recurring item.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                    'enum'        => array( 'D', 'W', 'M', 'Y' ),
+                ),
+
+                'recurring_interval'        => array(
+                    'description' => __( 'The recurring interval for a subscription item.', 'invoicing' ),
+                    'type'        => 'integer',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'recurring_limit'        => array(
+                    'description' => __( 'The maximum number of renewals for a subscription item.', 'invoicing' ),
+                    'type'        => 'integer',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'free_trial'        => array(
+                    'description' => __( 'Whether the item has a free trial period.', 'invoicing' ),
+                    'type'        => 'integer',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'trial_period'        => array(
+                    'description' => __( 'The trial period of a recurring item.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                    'enum'        => array( 'D', 'W', 'M', 'Y' ),
+                ),
+
+                'trial_interval'        => array(
+                    'description' => __( 'The trial interval for a subscription item.', 'invoicing' ),
+                    'type'        => 'integer',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'editable'        => array(
+                    'description' => __( 'Whether or not the item is editable.', 'invoicing' ),
+                    'type'        => 'integer',
+                    'context'     => array( 'view', 'edit' ),
+                ),
+
+            ),
+        );
+
+        // Add helpful links to the item schem.
+        $schema['links'] = $this->get_schema_links();
+
+        /**
+         * Filters the item schema for the REST API.
+         *
+         * Enables adding extra properties to items.
+         *
+         * @since 1.0.13
+         *
+         * @param array   $schema    The item schema.
+         */
         $schema = apply_filters( "wpinv_rest_item_schema", $schema );
 
-		//  Cache the item schema.
-		$this->schema = $schema;
+        //  Cache the item schema.
+        $this->schema = $schema;
 		
-		return $this->add_additional_fields_schema( $this->schema );
-	}
-
-	/**
-	 * Retrieve Link Description Objects that should be added to the Schema for the invoices collection.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @return array
-	 */
-	protected function get_schema_links() {
-
-		$href = rest_url( "{$this->namespace}/{$this->rest_base}/{id}" );
-
-		$links = array();
-
-		$links[] = array(
-			'rel'          => 'https://api.w.org/action-publish',
-			'title'        => __( 'The current user can publish this item.' ),
-			'href'         => $href,
-			'targetSchema' => array(
-				'type'       => 'object',
-				'properties' => array(
-					'status' => array(
-						'type' => 'string',
-						'enum' => array( 'publish', 'future' ),
-					),
-				),
-			),
-		);
-
-		return $links;
-	}
-
-	/**
-	 * Prepares links for the request.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WPInv_Item $item Item Object.
-	 * @return array Links for the given item.
-	 */
-	protected function prepare_links( $item ) {
-
-		// Prepare the base REST API endpoint for items.
-		$base = sprintf( '%s/%s', $this->namespace, $this->rest_base );
-
-		// Entity meta.
-		$links = array(
-			'self'       => array(
-				'href' => rest_url( trailingslashit( $base ) . $item->ID ),
-			),
-			'collection' => array(
-				'href' => rest_url( $base ),
-			),
-		);
-
-		/**
-		 * Filters the returned item links for the REST API.
-		 *
-		 * Enables adding extra links to item API responses.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param array   $links    Rest links.
-		 */
-		return apply_filters( "wpinv_rest_item_links", $links );
-
-	}
-
-	/**
-	 * Get the link relations available for the post and current user.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WPInv_Item   $item    Item object.
-	 * @param WP_REST_Request $request Request object.
-	 * @return array List of link relations.
-	 */
-	protected function get_available_actions( $item, $request ) {
-
-		if ( 'edit' !== $request['context'] ) {
-			return array();
-		}
-
-		$rels = array();
-
-		// Retrieve the post type object.
-		$post_type = get_post_type_object( $item->post_type );
-
-		// Mark item as published.
-		if ( current_user_can( $post_type->cap->publish_posts ) ) {
-			$rels[] = 'https://api.w.org/action-publish';
-		}
-
-		/**
-		 * Filters the available item link relations for the REST API.
-		 *
-		 * Enables adding extra link relation for the current user and request to item responses.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param array   $rels    Available link relations.
-		 */
-		return apply_filters( "wpinv_rest_item_link_relations", $rels );
-	}
-
-	/**
-	 * Handles rest requests for item types.
-	 *
-	 * @since 1.0.13
-	 * 
-	 * 
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function get_item_types() {
-		return rest_ensure_response( wpinv_get_item_types() );
-	}
+        return $this->add_additional_fields_schema( $this->schema );
+    }
+
+    /**
+     * Retrieve Link Description Objects that should be added to the Schema for the invoices collection.
+     *
+     * @since 1.0.13
+     *
+     * @return array
+     */
+    protected function get_schema_links() {
+
+        $href = rest_url( "{$this->namespace}/{$this->rest_base}/{id}" );
+
+        $links = array();
+
+        $links[] = array(
+            'rel'          => 'https://api.w.org/action-publish',
+            'title'        => __( 'The current user can publish this item.' ),
+            'href'         => $href,
+            'targetSchema' => array(
+                'type'       => 'object',
+                'properties' => array(
+                    'status' => array(
+                        'type' => 'string',
+                        'enum' => array( 'publish', 'future' ),
+                    ),
+                ),
+            ),
+        );
+
+        return $links;
+    }
+
+    /**
+     * Prepares links for the request.
+     *
+     * @since 1.0.13
+     *
+     * @param WPInv_Item $item Item Object.
+     * @return array Links for the given item.
+     */
+    protected function prepare_links( $item ) {
+
+        // Prepare the base REST API endpoint for items.
+        $base = sprintf( '%s/%s', $this->namespace, $this->rest_base );
+
+        // Entity meta.
+        $links = array(
+            'self'       => array(
+                'href' => rest_url( trailingslashit( $base ) . $item->ID ),
+            ),
+            'collection' => array(
+                'href' => rest_url( $base ),
+            ),
+        );
+
+        /**
+         * Filters the returned item links for the REST API.
+         *
+         * Enables adding extra links to item API responses.
+         *
+         * @since 1.0.13
+         *
+         * @param array   $links    Rest links.
+         */
+        return apply_filters( "wpinv_rest_item_links", $links );
+
+    }
+
+    /**
+     * Get the link relations available for the post and current user.
+     *
+     * @since 1.0.13
+     *
+     * @param WPInv_Item   $item    Item object.
+     * @param WP_REST_Request $request Request object.
+     * @return array List of link relations.
+     */
+    protected function get_available_actions( $item, $request ) {
+
+        if ( 'edit' !== $request['context'] ) {
+            return array();
+        }
+
+        $rels = array();
+
+        // Retrieve the post type object.
+        $post_type = get_post_type_object( $item->post_type );
+
+        // Mark item as published.
+        if ( current_user_can( $post_type->cap->publish_posts ) ) {
+            $rels[] = 'https://api.w.org/action-publish';
+        }
+
+        /**
+         * Filters the available item link relations for the REST API.
+         *
+         * Enables adding extra link relation for the current user and request to item responses.
+         *
+         * @since 1.0.13
+         *
+         * @param array   $rels    Available link relations.
+         */
+        return apply_filters( "wpinv_rest_item_link_relations", $rels );
+    }
+
+    /**
+     * Handles rest requests for item types.
+     *
+     * @since 1.0.13
+     * 
+     * 
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function get_item_types() {
+        return rest_ensure_response( wpinv_get_item_types() );
+    }
 
     
 }
\ No newline at end of file

Spacing +254 added lines, -254 removed lines

@@ -8,7 +8,7 @@ 
  * @since    1.0.13
  */
 
-if ( !defined( 'WPINC' ) ) {
+if (!defined('WPINC')) {
     exit;
 }
 
@@ -41,7 +41,7 @@ 
 	 *
 	 * @param string $namespace Api Namespace
 	 */
-	public function __construct( $namespace ) {
+	public function __construct($namespace) {
         
         // Set api namespace...
 		$this->namespace = $namespace;
@@ -68,7 +68,7 @@ 
 			array(
 				array(
 					'methods'             => WP_REST_Server::READABLE,
-					'callback'            => array( $this, 'get_item_types' ),
+					'callback'            => array($this, 'get_item_types'),
 				),
 			)
 		);
@@ -84,13 +84,13 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return true|WP_Error True if the request has read access, WP_Error object otherwise.
 	 */
-	public function get_items_permissions_check( $request ) {
+	public function get_items_permissions_check($request) {
 	
-		if ( current_user_can( 'manage_options' ) ||  current_user_can( 'manage_invoicing' ) ) {
+		if (current_user_can('manage_options') || current_user_can('manage_invoicing')) {
 			return true;
 		}
 
-		return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to view invoice items.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+		return new WP_Error('rest_forbidden_context', __('Sorry, you are not allowed to view invoice items.', 'invoicing'), array('status' => rest_authorization_required_code()));
 
     }
     
@@ -102,17 +102,17 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
-	public function get_items( $request ) {
+	public function get_items($request) {
 		
 		// Retrieve the list of registered item query parameters.
         $registered = $this->get_collection_params();
         
         $args       = array();
 
-        foreach( array_keys( $registered ) as $key ) {
+        foreach (array_keys($registered) as $key) {
 
-            if( isset( $request[ $key] ) ) {
-                $args[ $key ] = $request[ $key];
+            if (isset($request[$key])) {
+                $args[$key] = $request[$key];
             }
 
         }
@@ -127,32 +127,32 @@ 
 		 * @param array           $args    Key value array of query var to query value.
 		 * @param WP_REST_Request $request The request used.
 		 */
-        $args       = apply_filters( "wpinv_rest_get_items_arguments", $args, $request, $this );
+        $args = apply_filters("wpinv_rest_get_items_arguments", $args, $request, $this);
 		
 		// Special args
-		$args[ 'return' ]   = 'objects';
-		$args[ 'paginate' ] = true;
+		$args['return']   = 'objects';
+		$args['paginate'] = true;
 
         // Run the query.
-		$query = wpinv_get_all_items( $args );
+		$query = wpinv_get_all_items($args);
 		
 		// Prepare the retrieved items
 		$items = array();
-		foreach( $query->items as $item ) {
+		foreach ($query->items as $item) {
 
-			if ( ! $this->check_read_permission( $item ) ) {
+			if (!$this->check_read_permission($item)) {
 				continue;
 			}
 
-			$data       = $this->prepare_item_for_response( $item, $request );
-			$items[]    = $this->prepare_response_for_collection( $data );
+			$data       = $this->prepare_item_for_response($item, $request);
+			$items[]    = $this->prepare_response_for_collection($data);
 
 		}
 
 		// Prepare the response.
-		$response = rest_ensure_response( $items );
-		$response->header( 'X-WP-Total', (int) $query->total );
-		$response->header( 'X-WP-TotalPages', (int) $query->max_num_pages );
+		$response = rest_ensure_response($items);
+		$response->header('X-WP-Total', (int) $query->total);
+		$response->header('X-WP-TotalPages', (int) $query->max_num_pages);
 
 		/**
 		 * Filters the responses for item requests.
@@ -165,9 +165,9 @@ 
 		 * @param WP_REST_Request     $request The request used.
          * @param array               $args Array of args used to retrieve the items
 		 */
-        $response       = apply_filters( "wpinv_rest_items_response", $response, $request, $args );
+        $response = apply_filters("wpinv_rest_items_response", $response, $request, $args);
 
-        return rest_ensure_response( $response );
+        return rest_ensure_response($response);
         
     }
 
@@ -179,17 +179,17 @@ 
 	 * @param int $item_id Supplied ID.
 	 * @return WPInv_Item|WP_Error Item object if ID is valid, WP_Error otherwise.
 	 */
-	protected function get_post( $item_id ) {
+	protected function get_post($item_id) {
 		
-		$error     = new WP_Error( 'rest_item_invalid_id', __( 'Invalid item ID.', 'invoicing' ), array( 'status' => 404 ) );
+		$error = new WP_Error('rest_item_invalid_id', __('Invalid item ID.', 'invoicing'), array('status' => 404));
 
         // Ids start from 1
-        if ( (int) $item_id <= 0 ) {
+        if ((int) $item_id <= 0) {
 			return $error;
 		}
 
-		$item = wpinv_get_item_by( 'id', (int) $item_id );
-		if ( empty( $item ) ) {
+		$item = wpinv_get_item_by('id', (int) $item_id);
+		if (empty($item)) {
 			return $error;
         }
 
@@ -205,29 +205,29 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return bool|WP_Error True if the request has read access for the invoice item, WP_Error object otherwise.
 	 */
-	public function get_item_permissions_check( $request ) {
+	public function get_item_permissions_check($request) {
 
         // Retrieve the item object.
-        $item = $this->get_post( $request['id'] );
+        $item = $this->get_post($request['id']);
         
         // Ensure it is valid.
-		if ( is_wp_error( $item ) ) {
+		if (is_wp_error($item)) {
 			return $item;
 		}
 
-		$post_type = get_post_type_object( $this->post_type );
+		$post_type = get_post_type_object($this->post_type);
 
-		if ( ! current_user_can(  $post_type->cap->read_post, $item->ID  ) ) {
+		if (!current_user_can($post_type->cap->read_post, $item->ID)) {
 			return new WP_Error( 
                 'rest_cannot_edit', 
-                __( 'Sorry, you are not allowed to view this item.', 'invoicing' ), 
+                __('Sorry, you are not allowed to view this item.', 'invoicing'), 
                 array( 
                     'status' => rest_authorization_required_code(),
                 )
             );
         }
 
-		return $this->check_read_permission( $item );
+		return $this->check_read_permission($item);
     }
     
     /**
@@ -241,10 +241,10 @@ 
 	 * @param WPInv_Item $item WPInv_Item object.
 	 * @return bool Whether the post can be read.
 	 */
-	public function check_read_permission( $item ) {
+	public function check_read_permission($item) {
 
 		// An item can be read by an admin...
-		if ( current_user_can( 'manage_options' ) ||  current_user_can( 'manage_invoicing' ) ) {
+		if (current_user_can('manage_options') || current_user_can('manage_invoicing')) {
 			return true;
 		}
 
@@ -259,18 +259,18 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
-	public function get_item( $request ) {
+	public function get_item($request) {
 
         // Fetch the item.
-        $item = $this->get_post( $request['id'] );
+        $item = $this->get_post($request['id']);
         
         // Abort early if it does not exist
-		if ( is_wp_error( $item ) ) {
+		if (is_wp_error($item)) {
 			return $item;
 		}
 
 		// Prepare the response
-		$response = $this->prepare_item_for_response( $item, $request );
+		$response = $this->prepare_item_for_response($item, $request);
 
 		/**
 		 * Filters the responses for single invoice item requests.
@@ -282,9 +282,9 @@ 
 		 * @param WP_HTTP_Response $response Response.
 		 * @param WP_REST_Request  $request The request used.
 		 */
-        $response       = apply_filters( "wpinv_rest_get_item_response", $response, $request );
+        $response = apply_filters("wpinv_rest_get_item_response", $response, $request);
 
-        return rest_ensure_response( $response );
+        return rest_ensure_response($response);
 
     }
     
@@ -296,21 +296,21 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return true|WP_Error True if the request has access to create items, WP_Error object otherwise.
 	 */
-	public function create_item_permissions_check( $request ) {
+	public function create_item_permissions_check($request) {
 	
-		if ( ! empty( $request['id'] ) ) {
-			return new WP_Error( 'rest_item_exists', __( 'Cannot create existing item.', 'invoicing' ), array( 'status' => 400 ) );
+		if (!empty($request['id'])) {
+			return new WP_Error('rest_item_exists', __('Cannot create existing item.', 'invoicing'), array('status' => 400));
 		}
 
-		if ( current_user_can( 'manage_options' ) ||  current_user_can( 'manage_invoicing' ) ) {
+		if (current_user_can('manage_options') || current_user_can('manage_invoicing')) {
 			return true;
 		}
 
-		$post_type = get_post_type_object( $this->post_type );
-		if ( ! current_user_can( $post_type->cap->create_posts ) ) {
+		$post_type = get_post_type_object($this->post_type);
+		if (!current_user_can($post_type->cap->create_posts)) {
 			return new WP_Error( 
                 'rest_cannot_create', 
-                __( 'Sorry, you are not allowed to create invoice items as this user.', 'invoicing' ), 
+                __('Sorry, you are not allowed to create invoice items as this user.', 'invoicing'), 
                 array( 
                     'status' => rest_authorization_required_code(),
                 )
@@ -328,30 +328,30 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
-	public function create_item( $request ) {
+	public function create_item($request) {
 
-		if ( ! empty( $request['id'] ) ) {
-			return new WP_Error( 'rest_item_exists', __( 'Cannot create existing invoice item.', 'invoicing' ), array( 'status' => 400 ) );
+		if (!empty($request['id'])) {
+			return new WP_Error('rest_item_exists', __('Cannot create existing invoice item.', 'invoicing'), array('status' => 400));
 		}
 
-		$request->set_param( 'context', 'edit' );
+		$request->set_param('context', 'edit');
 
 		// Prepare the updated data.
-		$item_data = $this->prepare_item_for_database( $request );
+		$item_data = $this->prepare_item_for_database($request);
 
-		if ( is_wp_error( $item_data ) ) {
+		if (is_wp_error($item_data)) {
 			return $item_data;
 		}
 
 		// Try creating the item.
-        $item = wpinv_create_item( $item_data, true );
+        $item = wpinv_create_item($item_data, true);
 
-		if ( is_wp_error( $item ) ) {
+		if (is_wp_error($item)) {
             return $item;
 		}
 
 		// Prepare the response
-		$response = $this->prepare_item_for_response( $item, $request );
+		$response = $this->prepare_item_for_response($item, $request);
 
 		/**
 		 * Fires after a single invoice item is created or updated via the REST API.
@@ -362,7 +362,7 @@ 
 		 * @param WP_REST_Request $request  Request object.
 		 * @param bool            $creating True when creating a post, false when updating.
 		 */
-		do_action( "wpinv_rest_insert_item", $item, $request, true );
+		do_action("wpinv_rest_insert_item", $item, $request, true);
 
 		/**
 		 * Filters the responses for creating single item requests.
@@ -374,9 +374,9 @@ 
 		 * @param array           $item_data Invoice properties.
 		 * @param WP_REST_Request $request The request used.
 		 */
-        $response       = apply_filters( "wpinv_rest_create_item_response", $response, $request );
+        $response = apply_filters("wpinv_rest_create_item_response", $response, $request);
 
-        return rest_ensure_response( $response );
+        return rest_ensure_response($response);
 	}
 
 	/**
@@ -387,21 +387,21 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return true|WP_Error True if the request has access to update the item, WP_Error object otherwise.
 	 */
-	public function update_item_permissions_check( $request ) {
+	public function update_item_permissions_check($request) {
 
 		// Retrieve the item.
-		$item = $this->get_post( $request['id'] );
-		if ( is_wp_error( $item ) ) {
+		$item = $this->get_post($request['id']);
+		if (is_wp_error($item)) {
 			return $item;
 		}
 
-		if ( wpinv_current_user_can_manage_invoicing() ) {
+		if (wpinv_current_user_can_manage_invoicing()) {
 			return true;
 		}
 
 		return new WP_Error( 
 			'rest_cannot_edit', 
-			__( 'Sorry, you are not allowed to update this item.', 'invoicing' ), 
+			__('Sorry, you are not allowed to update this item.', 'invoicing'), 
 			array( 
 				'status' => rest_authorization_required_code(),
 			)
@@ -417,46 +417,46 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
-	public function update_item( $request ) {
+	public function update_item($request) {
 		
 		// Ensure the item exists.
-        $valid_check = $this->get_post( $request['id'] );
+        $valid_check = $this->get_post($request['id']);
         
         // Abort early if it does not exist
-		if ( is_wp_error( $valid_check ) ) {
+		if (is_wp_error($valid_check)) {
 			return $valid_check;
 		}
 
-		$request->set_param( 'context', 'edit' );
+		$request->set_param('context', 'edit');
 
 		// Prepare the updated data.
-		$data_to_update = $this->prepare_item_for_database( $request );
+		$data_to_update = $this->prepare_item_for_database($request);
 
-		if ( is_wp_error( $data_to_update ) ) {
+		if (is_wp_error($data_to_update)) {
 			return $data_to_update;
 		}
 
 		// Abort if no item data is provided
-        if( empty( $data_to_update ) ) {
-            return new WP_Error( 'missing_data', __( 'An update request cannot be empty.', 'invoicing' ) );
+        if (empty($data_to_update)) {
+            return new WP_Error('missing_data', __('An update request cannot be empty.', 'invoicing'));
         }
 
 		// Include the item ID
 		$data_to_update['ID'] = $request['id'];
 
 		// Update the item
-		$updated_item = wpinv_update_item( $data_to_update, true );
+		$updated_item = wpinv_update_item($data_to_update, true);
 
 		// Incase the update operation failed...
-		if ( is_wp_error( $updated_item ) ) {
+		if (is_wp_error($updated_item)) {
 			return $updated_item;
 		}
 
 		// Prepare the response
-		$response = $this->prepare_item_for_response( $updated_item, $request );
+		$response = $this->prepare_item_for_response($updated_item, $request);
 
 		/** This action is documented in includes/class-wpinv-rest-item-controller.php */
-		do_action( "wpinv_rest_insert_item", $updated_item, $request, false );
+		do_action("wpinv_rest_insert_item", $updated_item, $request, false);
 
 		/**
 		 * Filters the responses for updating single item requests.
@@ -468,9 +468,9 @@ 
 		 * @param array           $data_to_update Item properties.
 		 * @param WP_REST_Request $request The request used.
 		 */
-        $response       = apply_filters( "wpinv_rest_update_item_response", $response,  $data_to_update, $request );
+        $response = apply_filters("wpinv_rest_update_item_response", $response, $data_to_update, $request);
 
-        return rest_ensure_response( $response );
+        return rest_ensure_response($response);
 	}
 
 	/**
@@ -481,21 +481,21 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return true|WP_Error True if the request has access to delete the item, WP_Error object otherwise.
 	 */
-	public function delete_item_permissions_check( $request ) {
+	public function delete_item_permissions_check($request) {
 
 		// Retrieve the item.
-		$item = $this->get_post( $request['id'] );
-		if ( is_wp_error( $item ) ) {
+		$item = $this->get_post($request['id']);
+		if (is_wp_error($item)) {
 			return $item;
 		}
 
 		// 
 
 		// Ensure the current user can delete the item
-		if (! wpinv_can_delete_item( $request['id'] ) ) {
+		if (!wpinv_can_delete_item($request['id'])) {
 			return new WP_Error( 
                 'rest_cannot_delete', 
-                __( 'Sorry, you are not allowed to delete this item.', 'invoicing' ), 
+                __('Sorry, you are not allowed to delete this item.', 'invoicing'), 
                 array( 
                     'status' => rest_authorization_required_code(),
                 )
@@ -513,31 +513,31 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
-	public function delete_item( $request ) {
+	public function delete_item($request) {
 		
 		// Retrieve the item.
-		$item = $this->get_post( $request['id'] );
-		if ( is_wp_error( $item ) ) {
+		$item = $this->get_post($request['id']);
+		if (is_wp_error($item)) {
 			return $item;
 		}
 
-		$request->set_param( 'context', 'edit' );
+		$request->set_param('context', 'edit');
 
 		// Prepare the item id
-		$id    = $item->ID;
+		$id = $item->ID;
 
 		// Prepare the response
-		$response = $this->prepare_item_for_response( $item, $request );
+		$response = $this->prepare_item_for_response($item, $request);
 
 		// Check if the user wants to bypass the trash...
 		$force_delete = (bool) $request['force'];
 
 		// Try deleting the item.
-		$deleted = wp_delete_post( $id, $force_delete );
+		$deleted = wp_delete_post($id, $force_delete);
 
 		// Abort early if we can't delete the item.
-		if ( ! $deleted ) {
-			return new WP_Error( 'rest_cannot_delete', __( 'The item cannot be deleted.', 'invoicing' ), array( 'status' => 500 ) );
+		if (!$deleted) {
+			return new WP_Error('rest_cannot_delete', __('The item cannot be deleted.', 'invoicing'), array('status' => 500));
 		}
 
 		/**
@@ -549,7 +549,7 @@ 
 		 * @param WPInv_Item    $item  The deleted or trashed item.
 		 * @param WP_REST_Request  $request  The request sent to the API.
 		 */
-		do_action( "wpinv_rest_delete_item", $item, $request );
+		do_action("wpinv_rest_delete_item", $item, $request);
 
 		return $response;
 
@@ -565,19 +565,19 @@ 
 	 */
 	public function get_collection_params() {
         
-        $query_params               = array(
+        $query_params = array(
 
             // Item status.
             'status'                => array(
                 'default'           => 'publish',
-                'description'       => __( 'Limit result set to items assigned one or more statuses.', 'invoicing' ),
+                'description'       => __('Limit result set to items assigned one or more statuses.', 'invoicing'),
                 'type'              => 'array',
-                'sanitize_callback' => array( $this, 'sanitize_post_statuses' ),
+                'sanitize_callback' => array($this, 'sanitize_post_statuses'),
             ),
             
             // Item types
             'type'                  => array(
-				'description'       => __( 'Type of items to fetch.', 'invoicing' ),
+				'description'       => __('Type of items to fetch.', 'invoicing'),
 				'type'              => 'array',
 				'default'           => wpinv_item_types(),
 				'items'             => array(
@@ -588,21 +588,21 @@ 
 			
 			// Number of results per page
             'limit'                 => array(
-				'description'       => __( 'Number of items to fetch.', 'invoicing' ),
+				'description'       => __('Number of items to fetch.', 'invoicing'),
 				'type'              => 'integer',
-				'default'           => (int) get_option( 'posts_per_page' ),
+				'default'           => (int) get_option('posts_per_page'),
             ),
 
             // Pagination
             'page'     => array(
-				'description'       => __( 'Current page to fetch.', 'invoicing' ),
+				'description'       => __('Current page to fetch.', 'invoicing'),
 				'type'              => 'integer',
 				'default'           => 1,
             ),
 
             // Exclude certain items
             'exclude'  => array(
-                'description' => __( 'Ensure result set excludes specific IDs.', 'invoicing' ),
+                'description' => __('Ensure result set excludes specific IDs.', 'invoicing'),
                 'type'        => 'array',
                 'items'       => array(
                     'type' => 'integer',
@@ -612,7 +612,7 @@ 
 
             // Order items by
             'orderby'  => array(
-                'description' => __( 'Sort items by object attribute.', 'invoicing' ),
+                'description' => __('Sort items by object attribute.', 'invoicing'),
                 'type'        => 'string',
                 'default'     => 'date',
                 'enum'        => array(
@@ -628,15 +628,15 @@ 
 
             // How to order
             'order'    => array(
-                'description' => __( 'Order sort attribute ascending or descending.', 'invoicing' ),
+                'description' => __('Order sort attribute ascending or descending.', 'invoicing'),
                 'type'        => 'string',
                 'default'     => 'DESC',
-                'enum'        => array( 'ASC', 'DESC' ),
+                'enum'        => array('ASC', 'DESC'),
 			),
 			
 			// Search term
             'search'                => array(
-				'description'       => __( 'Return items that match the search term.', 'invoicing' ),
+				'description'       => __('Return items that match the search term.', 'invoicing'),
 				'type'              => 'string',
             ),
         );
@@ -649,7 +649,7 @@ 
 		 *
 		 * @param array        $query_params JSON Schema-formatted collection parameters.
 		 */
-		return apply_filters( "wpinv_rest_items_collection_params", $query_params );
+		return apply_filters("wpinv_rest_items_collection_params", $query_params);
     }
     
     /**
@@ -660,7 +660,7 @@ 
 	 * @param object|string $post_type Post type name or object.
 	 * @return bool Whether the post type is allowed in REST.
 	 */
-	protected function check_is_post_type_allowed( $post_type ) {
+	protected function check_is_post_type_allowed($post_type) {
 		return true;
 	}
 
@@ -672,84 +672,84 @@ 
 	 * @param WP_REST_Request $request Request object.
 	 * @return array|WP_Error Invoice Properties or WP_Error.
 	 */
-	protected function prepare_item_for_database( $request ) {
+	protected function prepare_item_for_database($request) {
 		$prepared_item = new stdClass();
 
 		// Post ID.
-		if ( isset( $request['id'] ) ) {
-			$existing_item = $this->get_post( $request['id'] );
-			if ( is_wp_error( $existing_item ) ) {
+		if (isset($request['id'])) {
+			$existing_item = $this->get_post($request['id']);
+			if (is_wp_error($existing_item)) {
 				return $existing_item;
 			}
 
-			$prepared_item->ID 		  = $existing_item->ID;
+			$prepared_item->ID = $existing_item->ID;
 		}
 
 		$schema = $this->get_item_schema();
 
 		// item title.
-		if ( ! empty( $schema['properties']['name'] ) && isset( $request['name'] ) ) {
-			$prepared_item->title = sanitize_text_field( $request['name'] );
+		if (!empty($schema['properties']['name']) && isset($request['name'])) {
+			$prepared_item->title = sanitize_text_field($request['name']);
 		}
 
 		// item summary.
-		if ( ! empty( $schema['properties']['summary'] ) && isset( $request['summary'] ) ) {
-			$prepared_item->excerpt = wp_kses_post( $request['summary'] );
+		if (!empty($schema['properties']['summary']) && isset($request['summary'])) {
+			$prepared_item->excerpt = wp_kses_post($request['summary']);
 		}
 
 		// item price.
-		if ( ! empty( $schema['properties']['price'] ) && isset( $request['price'] ) ) {
-			$prepared_item->price = floatval( $request['price'] );
+		if (!empty($schema['properties']['price']) && isset($request['price'])) {
+			$prepared_item->price = floatval($request['price']);
 		}
 
 		// minimum price (for dynamc items).
-		if ( ! empty( $schema['properties']['minimum_price'] ) && isset( $request['minimum_price'] ) ) {
-			$prepared_item->minimum_price = floatval( $request['minimum_price'] );
+		if (!empty($schema['properties']['minimum_price']) && isset($request['minimum_price'])) {
+			$prepared_item->minimum_price = floatval($request['minimum_price']);
 		}
 
 		// item status.
-		if ( ! empty( $schema['properties']['status'] ) && isset( $request['status'] ) ) {
+		if (!empty($schema['properties']['status']) && isset($request['status'])) {
 			$prepared_item->status = 'publish' === $request['status'] ? 'publish' : 'pending';
 		}
 
 		// item type.
-		if ( ! empty( $schema['properties']['type'] ) && isset( $request['type'] ) ) {
-			$prepared_item->type = in_array( $request['type'], wpinv_item_types() ) ? trim( strtolower( $request['type'] ) ) : 'custom';
+		if (!empty($schema['properties']['type']) && isset($request['type'])) {
+			$prepared_item->type = in_array($request['type'], wpinv_item_types()) ? trim(strtolower($request['type'])) : 'custom';
 		}
 
 		// VAT rule.
-		if ( ! empty( $schema['properties']['vat_rule'] ) && isset( $request['vat_rule'] ) ) {
+		if (!empty($schema['properties']['vat_rule']) && isset($request['vat_rule'])) {
 			$prepared_item->vat_rule = 'digital' === $request['vat_rule'] ? 'digital' : 'physical';
 		}
 
 		// Simple strings.
-		foreach( array( 'custom_id', 'custom_name', 'custom_singular_name' ) as $property ) {
+		foreach (array('custom_id', 'custom_name', 'custom_singular_name') as $property) {
 
-			if ( ! empty( $schema['properties'][$property] ) && isset( $request[$property] ) ) {
-				$prepared_item->$property = sanitize_text_field( $request[$property] );
+			if (!empty($schema['properties'][$property]) && isset($request[$property])) {
+				$prepared_item->$property = sanitize_text_field($request[$property]);
 			}
 
 		}
 
 		// Simple integers.
-		foreach( array( 'is_recurring', 'recurring_interval', 'recurring_limit', 'free_trial', 'trial_interval', 'dynamic_pricing', 'editable' ) as $property ) {
+		foreach (array('is_recurring', 'recurring_interval', 'recurring_limit', 'free_trial', 'trial_interval', 'dynamic_pricing', 'editable') as $property) {
 
-			if ( ! empty( $schema['properties'][$property] ) && isset( $request[$property] ) ) {
-				$prepared_item->$property = intval( $request[$property] );
+			if (!empty($schema['properties'][$property]) && isset($request[$property])) {
+				$prepared_item->$property = intval($request[$property]);
 			}
 
 		}
 
 		// Time periods.
-		foreach( array( 'recurring_period',  'trial_period' ) as $property ) {
+		foreach (array('recurring_period', 'trial_period') as $property) {
 
-			if ( ! empty( $schema['properties'][$property] ) && isset( $request[$property] ) ) {
-				$prepared_item->$property = in_array( $request[$property], array( 'D', 'W', 'M', 'Y' ) ) ? trim( strtoupper( $request[$property] ) ) : 'D';
+			if (!empty($schema['properties'][$property]) && isset($request[$property])) {
+				$prepared_item->$property = in_array($request[$property], array('D', 'W', 'M', 'Y')) ? trim(strtoupper($request[$property])) : 'D';
 			}
 
 		}
 
-		$item_data = (array) wp_unslash( $prepared_item );
+		$item_data = (array) wp_unslash($prepared_item);
 
 		/**
 		 * Filters an item before it is inserted via the REST API.
@@ -759,7 +759,7 @@ 
 		 * @param array        $item_data An array of item data
 		 * @param WP_REST_Request $request       Request object.
 		 */
-		return apply_filters( "wpinv_rest_pre_insert_item", $item_data, $request );
+		return apply_filters("wpinv_rest_pre_insert_item", $item_data, $request);
 
 	}
 
@@ -772,20 +772,20 @@ 
 	 * @param WP_REST_Request $request Request object.
 	 * @return WP_REST_Response Response object.
 	 */
-	public function prepare_item_for_response( $item, $request ) {
+	public function prepare_item_for_response($item, $request) {
 
-		$GLOBALS['post'] = get_post( $item->get_ID() );
+		$GLOBALS['post'] = get_post($item->get_ID());
 
-		setup_postdata( $item->get_ID() );
+		setup_postdata($item->get_ID());
 
 		// Fetch the fields to include in this response.
-		$fields = $this->get_fields_for_response( $request );
+		$fields = $this->get_fields_for_response($request);
 
 		// Base fields for every item.
 		$data = array();
 
 		// Set up ID
-		if ( rest_is_field_included( 'id', $fields ) ) {
+		if (rest_is_field_included('id', $fields)) {
 			$data['id'] = $item->get_ID();
 		}
 
@@ -798,49 +798,49 @@ 
 			'editable'
 		);
 
-		foreach( $item_properties as $property ) {
+		foreach ($item_properties as $property) {
 
-			if ( rest_is_field_included( $property, $fields ) && method_exists( $item, 'get_' . $property ) ) {
-				$data[$property] = call_user_func( array( $item, 'get_' . $property ) );
+			if (rest_is_field_included($property, $fields) && method_exists($item, 'get_' . $property)) {
+				$data[$property] = call_user_func(array($item, 'get_' . $property));
 			}
 
 		}
 
 		// Dynamic pricing.
-		if( $item->supports_dynamic_pricing() ) {
+		if ($item->supports_dynamic_pricing()) {
 
-			if( rest_is_field_included( 'dynamic_pricing', $fields ) ) {
+			if (rest_is_field_included('dynamic_pricing', $fields)) {
 				$data['dynamic_pricing'] = $item->get_is_dynamic_pricing();
 			}
 
-			if( rest_is_field_included( 'minimum_price', $fields ) ) {
+			if (rest_is_field_included('minimum_price', $fields)) {
 				$data['minimum_price'] = $item->get_minimum_price();
 			}
 		}
 
 		// Subscriptions.
-		if( rest_is_field_included( 'is_recurring', $fields ) ) {
+		if (rest_is_field_included('is_recurring', $fields)) {
 			$data['is_recurring'] = $item->get_is_recurring();
 		}
 
-		if( $item->is_recurring() ) {
+		if ($item->is_recurring()) {
 
-			$recurring_fields = array( 'is_recurring', 'recurring_period', 'recurring_interval', 'recurring_limit', 'free_trial' );
-			foreach( $recurring_fields as $field ) {
+			$recurring_fields = array('is_recurring', 'recurring_period', 'recurring_interval', 'recurring_limit', 'free_trial');
+			foreach ($recurring_fields as $field) {
 
-				if ( rest_is_field_included( $field, $fields ) && method_exists( $item, 'get_' . $field ) ) {
-					$data[$field] = call_user_func( array( $item, 'get_' . $field ) );
+				if (rest_is_field_included($field, $fields) && method_exists($item, 'get_' . $field)) {
+					$data[$field] = call_user_func(array($item, 'get_' . $field));
 				}
 	
 			}
 
-			if( $item->has_free_trial() ) {
+			if ($item->has_free_trial()) {
 
-				$trial_fields = array( 'trial_period', 'trial_interval' );
-				foreach( $trial_fields as $field ) {
+				$trial_fields = array('trial_period', 'trial_interval');
+				foreach ($trial_fields as $field) {
 
-					if ( rest_is_field_included( $field, $fields ) && method_exists( $item, 'get_' . $field ) ) {
-						$data[$field] = call_user_func( array( $item, 'get_' . $field ) );
+					if (rest_is_field_included($field, $fields) && method_exists($item, 'get_' . $field)) {
+						$data[$field] = call_user_func(array($item, 'get_' . $field));
 					}
 	
 				}
@@ -849,23 +849,23 @@ 
 
 		}
 
-		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
-		$data    = $this->add_additional_fields_to_object( $data, $request );
-		$data    = $this->filter_response_by_context( $data, $context );
+		$context = !empty($request['context']) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object($data, $request);
+		$data    = $this->filter_response_by_context($data, $context);
 
 		// Wrap the data in a response object.
-		$response = rest_ensure_response( $data );
+		$response = rest_ensure_response($data);
 
-		$links = $this->prepare_links( $item );
-		$response->add_links( $links );
+		$links = $this->prepare_links($item);
+		$response->add_links($links);
 
-		if ( ! empty( $links['self']['href'] ) ) {
-			$actions = $this->get_available_actions( $item, $request );
+		if (!empty($links['self']['href'])) {
+			$actions = $this->get_available_actions($item, $request);
 
 			$self = $links['self']['href'];
 
-			foreach ( $actions as $rel ) {
-				$response->add_link( $rel, $self );
+			foreach ($actions as $rel) {
+				$response->add_link($rel, $self);
 			}
 		}
 
@@ -878,7 +878,7 @@ 
 		 * @param WPInv_Item    $item  The item object.
 		 * @param WP_REST_Request  $request  Request object.
 		 */
-		return apply_filters( "wpinv_rest_prepare_item", $response, $item, $request );
+		return apply_filters("wpinv_rest_prepare_item", $response, $item, $request);
 	}
 
 	/**
@@ -891,57 +891,57 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return array Fields to be included in the response.
 	 */
-	public function get_fields_for_response( $request ) {
+	public function get_fields_for_response($request) {
 		$schema     = $this->get_item_schema();
-		$properties = isset( $schema['properties'] ) ? $schema['properties'] : array();
+		$properties = isset($schema['properties']) ? $schema['properties'] : array();
 
 		$additional_fields = $this->get_additional_fields();
-		foreach ( $additional_fields as $field_name => $field_options ) {
+		foreach ($additional_fields as $field_name => $field_options) {
 			// For back-compat, include any field with an empty schema
 			// because it won't be present in $this->get_item_schema().
-			if ( is_null( $field_options['schema'] ) ) {
-				$properties[ $field_name ] = $field_options;
+			if (is_null($field_options['schema'])) {
+				$properties[$field_name] = $field_options;
 			}
 		}
 
 		// Exclude fields that specify a different context than the request context.
 		$context = $request['context'];
-		if ( $context ) {
-			foreach ( $properties as $name => $options ) {
-				if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) {
-					unset( $properties[ $name ] );
+		if ($context) {
+			foreach ($properties as $name => $options) {
+				if (!empty($options['context']) && !in_array($context, $options['context'], true)) {
+					unset($properties[$name]);
 				}
 			}
 		}
 
-		$fields = array_keys( $properties );
+		$fields = array_keys($properties);
 
-		if ( ! isset( $request['_fields'] ) ) {
+		if (!isset($request['_fields'])) {
 			return $fields;
 		}
-		$requested_fields = wpinv_parse_list( $request['_fields'] );
-		if ( 0 === count( $requested_fields ) ) {
+		$requested_fields = wpinv_parse_list($request['_fields']);
+		if (0 === count($requested_fields)) {
 			return $fields;
 		}
 		// Trim off outside whitespace from the comma delimited list.
-		$requested_fields = array_map( 'trim', $requested_fields );
+		$requested_fields = array_map('trim', $requested_fields);
 		// Always persist 'id', because it can be needed for add_additional_fields_to_object().
-		if ( in_array( 'id', $fields, true ) ) {
+		if (in_array('id', $fields, true)) {
 			$requested_fields[] = 'id';
 		}
 		// Return the list of all requested fields which appear in the schema.
 		return array_reduce(
 			$requested_fields,
-			function( $response_fields, $field ) use ( $fields ) {
-				if ( in_array( $field, $fields, true ) ) {
+			function($response_fields, $field) use ($fields) {
+				if (in_array($field, $fields, true)) {
 					$response_fields[] = $field;
 					return $response_fields;
 				}
 				// Check for nested fields if $field is not a direct match.
-				$nested_fields = explode( '.', $field );
+				$nested_fields = explode('.', $field);
 				// A nested field is included so long as its top-level property is
 				// present in the schema.
-				if ( in_array( $nested_fields[0], $fields, true ) ) {
+				if (in_array($nested_fields[0], $fields, true)) {
 					$response_fields[] = $field;
 				}
 				return $response_fields;
@@ -960,8 +960,8 @@ 
 	public function get_item_schema() {
 
 		// Maybe retrieve the schema from cache.
-		if ( $this->schema ) {
-			return $this->add_additional_fields_schema( $this->schema );
+		if ($this->schema) {
+			return $this->add_additional_fields_schema($this->schema);
 		}
 
 		$schema = array(
@@ -973,136 +973,136 @@ 
 			'properties' 		  => array(
 
 				'id'           => array(
-					'description' => __( 'Unique identifier for the item.', 'invoicing' ),
+					'description' => __('Unique identifier for the item.', 'invoicing'),
 					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 					'readonly'    => true,
 				),
 
 				'name'			  => array(
-					'description' => __( 'The name for the item.', 'invoicing' ),
+					'description' => __('The name for the item.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'summary'        => array(
-					'description' => __( 'A summary for the item.', 'invoicing' ),
+					'description' => __('A summary for the item.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'price'        => array(
-					'description' => __( 'The price for the item.', 'invoicing' ),
+					'description' => __('The price for the item.', 'invoicing'),
 					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'status'       => array(
-					'description' => __( 'A named status for the item.', 'invoicing' ),
+					'description' => __('A named status for the item.', 'invoicing'),
 					'type'        => 'string',
-					'enum'        => array_keys( get_post_stati( array( 'internal' => false ) ) ),
-					'context'     => array( 'view', 'edit' ),
+					'enum'        => array_keys(get_post_stati(array('internal' => false))),
+					'context'     => array('view', 'edit'),
 				),
 
 				'type'       => array(
-					'description' => __( 'The item type.', 'invoicing' ),
+					'description' => __('The item type.', 'invoicing'),
 					'type'        => 'string',
 					'enum'        => wpinv_item_types(),
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'vat_rule'       => array(
-					'description' => __( 'VAT rule applied to the item.', 'invoicing' ),
+					'description' => __('VAT rule applied to the item.', 'invoicing'),
 					'type'        => 'string',
-					'enum'        => array( 'digital', 'physical' ),
-					'context'     => array( 'view', 'edit' ),
+					'enum'        => array('digital', 'physical'),
+					'context'     => array('view', 'edit'),
 				),
 
 				'vat_class'       => array(
-					'description' => __( 'VAT class for the item.', 'invoicing' ),
+					'description' => __('VAT class for the item.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit' ),
+					'context'     => array('view', 'edit'),
 					'readonly'    => true,
 				),
 
 				'custom_id'       => array(
-					'description' => __( 'Custom id for the item.', 'invoicing' ),
+					'description' => __('Custom id for the item.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 				
 				'custom_name'       => array(
-					'description' => __( 'Custom name for the item.', 'invoicing' ),
+					'description' => __('Custom name for the item.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'custom_singular_name'       => array(
-					'description' => __( 'Custom singular name for the item.', 'invoicing' ),
+					'description' => __('Custom singular name for the item.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'dynamic_pricing'        => array(
-					'description' => __( 'Whether the item allows a user to set their own price.', 'invoicing' ),
+					'description' => __('Whether the item allows a user to set their own price.', 'invoicing'),
 					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'minimum_price'        => array(
-					'description' => __( 'For dynamic prices, this is the minimum price that a user can set.', 'invoicing' ),
+					'description' => __('For dynamic prices, this is the minimum price that a user can set.', 'invoicing'),
 					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'is_recurring'        => array(
-					'description' => __( 'Whether the item is a subscription item.', 'invoicing' ),
+					'description' => __('Whether the item is a subscription item.', 'invoicing'),
 					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'recurring_period'        => array(
-					'description' => __( 'The recurring period for a recurring item.', 'invoicing' ),
+					'description' => __('The recurring period for a recurring item.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
-					'enum'        => array( 'D', 'W', 'M', 'Y' ),
+					'context'     => array('view', 'edit', 'embed'),
+					'enum'        => array('D', 'W', 'M', 'Y'),
 				),
 
 				'recurring_interval'        => array(
-					'description' => __( 'The recurring interval for a subscription item.', 'invoicing' ),
+					'description' => __('The recurring interval for a subscription item.', 'invoicing'),
 					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'recurring_limit'        => array(
-					'description' => __( 'The maximum number of renewals for a subscription item.', 'invoicing' ),
+					'description' => __('The maximum number of renewals for a subscription item.', 'invoicing'),
 					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'free_trial'        => array(
-					'description' => __( 'Whether the item has a free trial period.', 'invoicing' ),
+					'description' => __('Whether the item has a free trial period.', 'invoicing'),
 					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'trial_period'        => array(
-					'description' => __( 'The trial period of a recurring item.', 'invoicing' ),
+					'description' => __('The trial period of a recurring item.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
-					'enum'        => array( 'D', 'W', 'M', 'Y' ),
+					'context'     => array('view', 'edit', 'embed'),
+					'enum'        => array('D', 'W', 'M', 'Y'),
 				),
 
 				'trial_interval'        => array(
-					'description' => __( 'The trial interval for a subscription item.', 'invoicing' ),
+					'description' => __('The trial interval for a subscription item.', 'invoicing'),
 					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'editable'        => array(
-					'description' => __( 'Whether or not the item is editable.', 'invoicing' ),
+					'description' => __('Whether or not the item is editable.', 'invoicing'),
 					'type'        => 'integer',
-					'context'     => array( 'view', 'edit' ),
+					'context'     => array('view', 'edit'),
 				),
 
 			),
@@ -1120,12 +1120,12 @@ 
 		 *
 		 * @param array   $schema    The item schema.
 		 */
-        $schema = apply_filters( "wpinv_rest_item_schema", $schema );
+        $schema = apply_filters("wpinv_rest_item_schema", $schema);
 
 		//  Cache the item schema.
 		$this->schema = $schema;
 		
-		return $this->add_additional_fields_schema( $this->schema );
+		return $this->add_additional_fields_schema($this->schema);
 	}
 
 	/**
@@ -1137,20 +1137,20 @@ 
 	 */
 	protected function get_schema_links() {
 
-		$href = rest_url( "{$this->namespace}/{$this->rest_base}/{id}" );
+		$href = rest_url("{$this->namespace}/{$this->rest_base}/{id}");
 
 		$links = array();
 
 		$links[] = array(
 			'rel'          => 'https://api.w.org/action-publish',
-			'title'        => __( 'The current user can publish this item.' ),
+			'title'        => __('The current user can publish this item.'),
 			'href'         => $href,
 			'targetSchema' => array(
 				'type'       => 'object',
 				'properties' => array(
 					'status' => array(
 						'type' => 'string',
-						'enum' => array( 'publish', 'future' ),
+						'enum' => array('publish', 'future'),
 					),
 				),
 			),
@@ -1167,18 +1167,18 @@ 
 	 * @param WPInv_Item $item Item Object.
 	 * @return array Links for the given item.
 	 */
-	protected function prepare_links( $item ) {
+	protected function prepare_links($item) {
 
 		// Prepare the base REST API endpoint for items.
-		$base = sprintf( '%s/%s', $this->namespace, $this->rest_base );
+		$base = sprintf('%s/%s', $this->namespace, $this->rest_base);
 
 		// Entity meta.
 		$links = array(
 			'self'       => array(
-				'href' => rest_url( trailingslashit( $base ) . $item->ID ),
+				'href' => rest_url(trailingslashit($base) . $item->ID),
 			),
 			'collection' => array(
-				'href' => rest_url( $base ),
+				'href' => rest_url($base),
 			),
 		);
 
@@ -1191,7 +1191,7 @@ 
 		 *
 		 * @param array   $links    Rest links.
 		 */
-		return apply_filters( "wpinv_rest_item_links", $links );
+		return apply_filters("wpinv_rest_item_links", $links);
 
 	}
 
@@ -1204,19 +1204,19 @@ 
 	 * @param WP_REST_Request $request Request object.
 	 * @return array List of link relations.
 	 */
-	protected function get_available_actions( $item, $request ) {
+	protected function get_available_actions($item, $request) {
 
-		if ( 'edit' !== $request['context'] ) {
+		if ('edit' !== $request['context']) {
 			return array();
 		}
 
 		$rels = array();
 
 		// Retrieve the post type object.
-		$post_type = get_post_type_object( $item->post_type );
+		$post_type = get_post_type_object($item->post_type);
 
 		// Mark item as published.
-		if ( current_user_can( $post_type->cap->publish_posts ) ) {
+		if (current_user_can($post_type->cap->publish_posts)) {
 			$rels[] = 'https://api.w.org/action-publish';
 		}
 
@@ -1229,7 +1229,7 @@ 
 		 *
 		 * @param array   $rels    Available link relations.
 		 */
-		return apply_filters( "wpinv_rest_item_link_relations", $rels );
+		return apply_filters("wpinv_rest_item_link_relations", $rels);
 	}
 
 	/**
@@ -1241,7 +1241,7 @@ 
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
 	public function get_item_types() {
-		return rest_ensure_response( wpinv_get_item_types() );
+		return rest_ensure_response(wpinv_get_item_types());
 	}
 
     

includes/api/class-wpinv-rest-discounts-controller.php

Indentation +970 added lines, -970 removed lines

@@ -20,91 +20,91 @@ 
 class WPInv_REST_Discounts_Controller extends WP_REST_Posts_Controller {
 
     /**
-	 * Post type.
-	 *
-	 * @var string
-	 */
-	protected $post_type = 'wpi_discount';
+     * Post type.
+     *
+     * @var string
+     */
+    protected $post_type = 'wpi_discount';
 	
-	/**
-	 * Cached results of get_item_schema.
-	 *
-	 * @since 1.0.13
-	 * @var array
-	 */
-	protected $schema;
+    /**
+     * Cached results of get_item_schema.
+     *
+     * @since 1.0.13
+     * @var array
+     */
+    protected $schema;
 
     /**
-	 * Constructor.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param string $namespace Api Namespace
-	 */
-	public function __construct( $namespace ) {
+     * Constructor.
+     *
+     * @since 1.0.13
+     *
+     * @param string $namespace Api Namespace
+     */
+    public function __construct( $namespace ) {
         
         // Set api namespace...
-		$this->namespace = $namespace;
+        $this->namespace = $namespace;
 
         // ... and the rest base
         $this->rest_base = 'discounts';
 		
     }
 	
-	/**
-	 * Registers the routes for the objects of the controller.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @see register_rest_route()
-	 */
-	public function register_routes() {
-
-		parent::register_routes();
-
-		register_rest_route(
-			$this->namespace,
-			'/' . $this->rest_base . '/discount-types',
-			array(
-				array(
-					'methods'             => WP_REST_Server::READABLE,
-					'callback'            => array( $this, 'get_discount_types' ),
-				),
-			)
-		);
-
-	}
+    /**
+     * Registers the routes for the objects of the controller.
+     *
+     * @since 1.0.13
+     *
+     * @see register_rest_route()
+     */
+    public function register_routes() {
+
+        parent::register_routes();
+
+        register_rest_route(
+            $this->namespace,
+            '/' . $this->rest_base . '/discount-types',
+            array(
+                array(
+                    'methods'             => WP_REST_Server::READABLE,
+                    'callback'            => array( $this, 'get_discount_types' ),
+                ),
+            )
+        );
+
+    }
 
     /**
-	 * Checks if a given request has access to read discounts.
+     * Checks if a given request has access to read discounts.
      * 
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return true|WP_Error True if the request has read access, WP_Error object otherwise.
-	 */
-	public function get_items_permissions_check( $request ) {
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return true|WP_Error True if the request has read access, WP_Error object otherwise.
+     */
+    public function get_items_permissions_check( $request ) {
 	
-		if ( wpinv_current_user_can_manage_invoicing() ) {
-			return true;
-		}
+        if ( wpinv_current_user_can_manage_invoicing() ) {
+            return true;
+        }
 
-		return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to view invoice discounts.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+        return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to view invoice discounts.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
 
     }
     
     /**
-	 * Retrieves a collection of discounts.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function get_items( $request ) {
+     * Retrieves a collection of discounts.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function get_items( $request ) {
 		
-		// Retrieve the list of registered item query parameters.
+        // Retrieve the list of registered item query parameters.
         $registered = $this->get_collection_params();
         
         $args       = array();
@@ -115,52 +115,52 @@ 
                 $args[ $key ] = $request[ $key];
             }
 
-		} 
-
-		/**
-		 * Filters the wpinv_get_all_discounts arguments for discounts rest requests.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 *
-		 * @param array           $args    Key value array of query var to query value.
-		 * @param WP_REST_Request $request The request used.
-		 */
+        } 
+
+        /**
+         * Filters the wpinv_get_all_discounts arguments for discounts rest requests.
+         *
+         *
+         * @since 1.0.13
+         *
+         *
+         * @param array           $args    Key value array of query var to query value.
+         * @param WP_REST_Request $request The request used.
+         */
         $args       = apply_filters( "wpinv_rest_get_discounts_arguments", $args, $request, $this );
 		
-		// Special args
-		$args[ 'return' ]   = 'objects';
-		$args[ 'paginate' ] = true;
+        // Special args
+        $args[ 'return' ]   = 'objects';
+        $args[ 'paginate' ] = true;
 
         // Run the query.
-		$query = wpinv_get_all_discounts( $args );
+        $query = wpinv_get_all_discounts( $args );
 		
-		// Prepare the retrieved discounts
-		$discounts = array();
-		foreach( $query->discounts as $discount ) {
-
-			$data       = $this->prepare_item_for_response( $discount, $request );
-			$discounts[]    = $this->prepare_response_for_collection( $data );
-
-		}
-
-		// Prepare the response.
-		$response = rest_ensure_response( $discounts );
-		$response->header( 'X-WP-Total', (int) $query->total );
-		$response->header( 'X-WP-TotalPages', (int) $query->max_num_pages );
-
-		/**
-		 * Filters the responses for discount requests.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 *
-		 * @param arrWP_REST_Response $response    Response object.
-		 * @param WP_REST_Request     $request The request used.
+        // Prepare the retrieved discounts
+        $discounts = array();
+        foreach( $query->discounts as $discount ) {
+
+            $data       = $this->prepare_item_for_response( $discount, $request );
+            $discounts[]    = $this->prepare_response_for_collection( $data );
+
+        }
+
+        // Prepare the response.
+        $response = rest_ensure_response( $discounts );
+        $response->header( 'X-WP-Total', (int) $query->total );
+        $response->header( 'X-WP-TotalPages', (int) $query->max_num_pages );
+
+        /**
+         * Filters the responses for discount requests.
+         *
+         *
+         * @since 1.0.13
+         *
+         *
+         * @param arrWP_REST_Response $response    Response object.
+         * @param WP_REST_Request     $request The request used.
          * @param array               $args Array of args used to retrieve the discounts
-		 */
+         */
         $response       = apply_filters( "wpinv_rest_discounts_response", $response, $request, $args );
 
         return rest_ensure_response( $response );
@@ -168,25 +168,25 @@ 
     }
 
     /**
-	 * Get the post, if the ID is valid.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param int $discount_id Supplied ID.
-	 * @return WPInv_Item|WP_Error Item object if ID is valid, WP_Error otherwise.
-	 */
-	protected function get_post( $discount_id ) {
+     * Get the post, if the ID is valid.
+     *
+     * @since 1.0.13
+     *
+     * @param int $discount_id Supplied ID.
+     * @return WPInv_Item|WP_Error Item object if ID is valid, WP_Error otherwise.
+     */
+    protected function get_post( $discount_id ) {
 		
-		$error     = new WP_Error( 'rest_item_invalid_id', __( 'Invalid discount ID.', 'invoicing' ), array( 'status' => 404 ) );
+        $error     = new WP_Error( 'rest_item_invalid_id', __( 'Invalid discount ID.', 'invoicing' ), array( 'status' => 404 ) );
 
         // Ids start from 1
         if ( (int) $discount_id <= 0 ) {
-			return $error;
-		}
+            return $error;
+        }
 
-		$discount = wpinv_get_discount( (int) $discount_id );
-		if ( empty( $discount ) ) {
-			return $error;
+        $discount = wpinv_get_discount( (int) $discount_id );
+        if ( empty( $discount ) ) {
+            return $error;
         }
 
         return $discount;
@@ -194,25 +194,25 @@ 
     }
 
     /**
-	 * Checks if a given request has access to read a discount.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return bool|WP_Error True if the request has read access for the invoice item, WP_Error object otherwise.
-	 */
-	public function get_item_permissions_check( $request ) {
+     * Checks if a given request has access to read a discount.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return bool|WP_Error True if the request has read access for the invoice item, WP_Error object otherwise.
+     */
+    public function get_item_permissions_check( $request ) {
 
         // Retrieve the discount object.
         $discount = $this->get_post( $request['id'] );
         
         // Ensure it is valid.
-		if ( is_wp_error( $discount ) ) {
-			return $discount;
-		}
+        if ( is_wp_error( $discount ) ) {
+            return $discount;
+        }
 
-		if ( ! wpinv_current_user_can_manage_invoicing() ) {
-			return new WP_Error(
+        if ( ! wpinv_current_user_can_manage_invoicing() ) {
+            return new WP_Error(
                 'rest_cannot_view', 
                 __( 'Sorry, you are not allowed to view this discount.', 'invoicing' ), 
                 array( 
@@ -221,40 +221,40 @@ 
             );
         }
 
-		return true;
+        return true;
     }
     
     /**
-	 * Retrieves a single invoice item.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function get_item( $request ) {
+     * Retrieves a single invoice item.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function get_item( $request ) {
 
         // Fetch the discount.
         $discount = $this->get_post( $request['id'] );
         
         // Abort early if it does not exist
-		if ( is_wp_error( $discount ) ) {
-			return $discount;
-		}
-
-		// Prepare the response
-		$response = $this->prepare_item_for_response( $discount, $request );
-
-		/**
-		 * Filters the responses for single discount requests.
-		 *
-		 *
-		 * @since 1.0.13
-		 * @var WP_HTTP_Response
-		 *
-		 * @param WP_HTTP_Response $response Response.
-		 * @param WP_REST_Request  $request The request used.
-		 */
+        if ( is_wp_error( $discount ) ) {
+            return $discount;
+        }
+
+        // Prepare the response
+        $response = $this->prepare_item_for_response( $discount, $request );
+
+        /**
+         * Filters the responses for single discount requests.
+         *
+         *
+         * @since 1.0.13
+         * @var WP_HTTP_Response
+         *
+         * @param WP_HTTP_Response $response Response.
+         * @param WP_REST_Request  $request The request used.
+         */
         $response       = apply_filters( "wpinv_rest_get_discount_response", $response, $request );
 
         return rest_ensure_response( $response );
@@ -262,26 +262,26 @@ 
     }
     
     /**
-	 * Checks if a given request has access to create an invoice item.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return true|WP_Error True if the request has access to create items, WP_Error object otherwise.
-	 */
-	public function create_item_permissions_check( $request ) {
+     * Checks if a given request has access to create an invoice item.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return true|WP_Error True if the request has access to create items, WP_Error object otherwise.
+     */
+    public function create_item_permissions_check( $request ) {
 	
-		if ( ! empty( $request['id'] ) ) {
-			return new WP_Error( 'rest_item_exists', __( 'Cannot create existing item.', 'invoicing' ), array( 'status' => 400 ) );
-		}
+        if ( ! empty( $request['id'] ) ) {
+            return new WP_Error( 'rest_item_exists', __( 'Cannot create existing item.', 'invoicing' ), array( 'status' => 400 ) );
+        }
 
-		if ( wpinv_current_user_can_manage_invoicing() ) {
-			return true;
-		}
+        if ( wpinv_current_user_can_manage_invoicing() ) {
+            return true;
+        }
 
-		$post_type = get_post_type_object( $this->post_type );
-		if ( ! current_user_can( $post_type->cap->create_posts ) ) {
-			return new WP_Error( 
+        $post_type = get_post_type_object( $this->post_type );
+        if ( ! current_user_can( $post_type->cap->create_posts ) ) {
+            return new WP_Error( 
                 'rest_cannot_create', 
                 __( 'Sorry, you are not allowed to create discounts as this user.', 'invoicing' ), 
                 array( 
@@ -290,261 +290,261 @@ 
             );
         }
 
-		return true;
+        return true;
     }
     
     /**
-	 * Creates a single discount.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function create_item( $request ) {
-
-		if ( ! empty( $request['id'] ) ) {
-			return new WP_Error( 'rest_item_exists', __( 'Cannot create existing discount.', 'invoicing' ), array( 'status' => 400 ) );
-		}
+     * Creates a single discount.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function create_item( $request ) {
+
+        if ( ! empty( $request['id'] ) ) {
+            return new WP_Error( 'rest_item_exists', __( 'Cannot create existing discount.', 'invoicing' ), array( 'status' => 400 ) );
+        }
 
-		$request->set_param( 'context', 'edit' );
+        $request->set_param( 'context', 'edit' );
 
-		// Prepare the updated data.
-		$discount_data = $this->prepare_item_for_database( $request );
+        // Prepare the updated data.
+        $discount_data = $this->prepare_item_for_database( $request );
 
-		if ( is_wp_error( $discount_data ) ) {
-			return $discount_data;
-		}
+        if ( is_wp_error( $discount_data ) ) {
+            return $discount_data;
+        }
 
-		$discount_data['post_type'] = $this->post_type;
+        $discount_data['post_type'] = $this->post_type;
 
-		// Try creating the discount.
+        // Try creating the discount.
         $discount = wp_insert_post( $discount_data, true );
 
-		if ( is_wp_error( $discount ) ) {
+        if ( is_wp_error( $discount ) ) {
             return $discount;
-		}
-
-		// Prepare the response
-		$response = $this->prepare_item_for_response( $discount, $request );
-
-		/**
-		 * Fires after a single discount is created or updated via the REST API.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param WP_Post   $discount  Inserted or updated discount object.
-		 * @param WP_REST_Request $request  Request object.
-		 * @param bool            $creating True when creating a post, false when updating.
-		 */
-		do_action( "wpinv_rest_insert_discount", $discount, $request, true );
-
-		/**
-		 * Filters the responses for creating single item requests.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 *
-		 * @param array           $response Invoice properties.
-		 * @param WP_REST_Request $request The request used.
-		 */
+        }
+
+        // Prepare the response
+        $response = $this->prepare_item_for_response( $discount, $request );
+
+        /**
+         * Fires after a single discount is created or updated via the REST API.
+         *
+         * @since 1.0.13
+         *
+         * @param WP_Post   $discount  Inserted or updated discount object.
+         * @param WP_REST_Request $request  Request object.
+         * @param bool            $creating True when creating a post, false when updating.
+         */
+        do_action( "wpinv_rest_insert_discount", $discount, $request, true );
+
+        /**
+         * Filters the responses for creating single item requests.
+         *
+         *
+         * @since 1.0.13
+         *
+         *
+         * @param array           $response Invoice properties.
+         * @param WP_REST_Request $request The request used.
+         */
         $response       = apply_filters( "wpinv_rest_create_discount_response", $response, $request );
 
         return rest_ensure_response( $response );
-	}
-
-	/**
-	 * Checks if a given request has access to update a discount.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return true|WP_Error True if the request has access to update the item, WP_Error object otherwise.
-	 */
-	public function update_item_permissions_check( $request ) {
-
-		// Retrieve the item.
-		$item = $this->get_post( $request['id'] );
-		if ( is_wp_error( $item ) ) {
-			return $item;
-		}
-
-		if ( wpinv_current_user_can_manage_invoicing() ) {
-			return true;
-		}
-
-		return new WP_Error( 
-			'rest_cannot_edit', 
-			__( 'Sorry, you are not allowed to update this discount.', 'invoicing' ), 
-			array( 
-				'status' => rest_authorization_required_code(),
-			)
-		);
-
-	}
-
-	/**
-	 * Updates a single discount.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function update_item( $request ) {
+    }
+
+    /**
+     * Checks if a given request has access to update a discount.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return true|WP_Error True if the request has access to update the item, WP_Error object otherwise.
+     */
+    public function update_item_permissions_check( $request ) {
+
+        // Retrieve the item.
+        $item = $this->get_post( $request['id'] );
+        if ( is_wp_error( $item ) ) {
+            return $item;
+        }
+
+        if ( wpinv_current_user_can_manage_invoicing() ) {
+            return true;
+        }
+
+        return new WP_Error( 
+            'rest_cannot_edit', 
+            __( 'Sorry, you are not allowed to update this discount.', 'invoicing' ), 
+            array( 
+                'status' => rest_authorization_required_code(),
+            )
+        );
+
+    }
+
+    /**
+     * Updates a single discount.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function update_item( $request ) {
 		
-		// Ensure the item exists.
+        // Ensure the item exists.
         $valid_check = $this->get_post( $request['id'] );
         
         // Abort early if it does not exist
-		if ( is_wp_error( $valid_check ) ) {
-			return $valid_check;
-		}
+        if ( is_wp_error( $valid_check ) ) {
+            return $valid_check;
+        }
 
-		$request->set_param( 'context', 'edit' );
+        $request->set_param( 'context', 'edit' );
 
-		// Prepare the updated data.
-		$data_to_update = $this->prepare_item_for_database( $request );
+        // Prepare the updated data.
+        $data_to_update = $this->prepare_item_for_database( $request );
 
-		if ( is_wp_error( $data_to_update ) ) {
-			return $data_to_update;
-		}
+        if ( is_wp_error( $data_to_update ) ) {
+            return $data_to_update;
+        }
 
-		if( empty( $data_to_update['meta_input'] ) ) {
-			unset( $data_to_update['meta_input'] );
-		}
+        if( empty( $data_to_update['meta_input'] ) ) {
+            unset( $data_to_update['meta_input'] );
+        }
 
-		// Abort if no item data is provided
+        // Abort if no item data is provided
         if( empty( $data_to_update ) ) {
             return new WP_Error( 'missing_data', __( 'An update request cannot be empty.', 'invoicing' ) );
-		}
+        }
 		
-		// post_status
-		if( ! empty( $data_to_update['post_status'] ) ) {
-			wpinv_update_discount_status( $request['id'], $data_to_update['post_status'] );
-			unset( $data_to_update['post_status'] );
-		}
+        // post_status
+        if( ! empty( $data_to_update['post_status'] ) ) {
+            wpinv_update_discount_status( $request['id'], $data_to_update['post_status'] );
+            unset( $data_to_update['post_status'] );
+        }
 
-		// Update the item
-		if( ! empty( $data_to_update ) ) {
+        // Update the item
+        if( ! empty( $data_to_update ) ) {
 
-			// Include the item ID
-			$data_to_update['ID'] = $request['id'];
+            // Include the item ID
+            $data_to_update['ID'] = $request['id'];
 
-			$updated = wp_update_post( $data_to_update, true );
+            $updated = wp_update_post( $data_to_update, true );
 
-			// Incase the update operation failed...
-			if ( is_wp_error( $updated ) ) {
-				return $updated;
-			}
+            // Incase the update operation failed...
+            if ( is_wp_error( $updated ) ) {
+                return $updated;
+            }
 
-		}
+        }
 
-		$updated_discount = get_post( $request['id'] );
+        $updated_discount = get_post( $request['id'] );
 
-		// Prepare the response
-		$response = $this->prepare_item_for_response( $updated_discount, $request );
+        // Prepare the response
+        $response = $this->prepare_item_for_response( $updated_discount, $request );
 
-		/** This action is documented in includes/class-wpinv-rest-item-controller.php */
-		do_action( "wpinv_rest_insert_discount", $updated_discount, $request, false );
+        /** This action is documented in includes/class-wpinv-rest-item-controller.php */
+        do_action( "wpinv_rest_insert_discount", $updated_discount, $request, false );
 
-		/**
-		 * Filters the responses for updating single discount requests.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 *
-		 * @param array           $data_to_update Discount properties.
-		 * @param WP_REST_Request $request The request used.
-		 */
+        /**
+         * Filters the responses for updating single discount requests.
+         *
+         *
+         * @since 1.0.13
+         *
+         *
+         * @param array           $data_to_update Discount properties.
+         * @param WP_REST_Request $request The request used.
+         */
         $response       = apply_filters( "wpinv_rest_update_discount_response", $response,  $data_to_update, $request );
 
         return rest_ensure_response( $response );
-	}
-
-	/**
-	 * Checks if a given request has access to delete a discount.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return true|WP_Error True if the request has access to delete the discount, WP_Error object otherwise.
-	 */
-	public function delete_item_permissions_check( $request ) {
-
-		// Retrieve the discount.
-		$discount = $this->get_post( $request['id'] );
-		if ( is_wp_error( $discount ) ) {
-			return $discount;
-		} 
-
-		// Ensure the current user can delete the discount
-		if (! wpinv_current_user_can_manage_invoicing() ) {
-			return new WP_Error( 
+    }
+
+    /**
+     * Checks if a given request has access to delete a discount.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return true|WP_Error True if the request has access to delete the discount, WP_Error object otherwise.
+     */
+    public function delete_item_permissions_check( $request ) {
+
+        // Retrieve the discount.
+        $discount = $this->get_post( $request['id'] );
+        if ( is_wp_error( $discount ) ) {
+            return $discount;
+        } 
+
+        // Ensure the current user can delete the discount
+        if (! wpinv_current_user_can_manage_invoicing() ) {
+            return new WP_Error( 
                 'rest_cannot_delete', 
                 __( 'Sorry, you are not allowed to delete this discount.', 'invoicing' ), 
                 array( 
                     'status' => rest_authorization_required_code(),
                 )
             );
-		}
-
-		return true;
-	}
-
-	/**
-	 * Deletes a single discount.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function delete_item( $request ) {
+        }
+
+        return true;
+    }
+
+    /**
+     * Deletes a single discount.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function delete_item( $request ) {
 		
-		// Retrieve the discount.
-		$discount = $this->get_post( $request['id'] );
-		if ( is_wp_error( $discount ) ) {
-			return $discount;
-		}
+        // Retrieve the discount.
+        $discount = $this->get_post( $request['id'] );
+        if ( is_wp_error( $discount ) ) {
+            return $discount;
+        }
 
-		$request->set_param( 'context', 'edit' );
+        $request->set_param( 'context', 'edit' );
 
-		// Prepare the discount id
-		$id    = $discount->ID;
+        // Prepare the discount id
+        $id    = $discount->ID;
 
-		// Prepare the response
-		$response = $this->prepare_item_for_response( $discount, $request );
+        // Prepare the response
+        $response = $this->prepare_item_for_response( $discount, $request );
 
-		// Delete the discount...
-		wpinv_remove_discount( $id );
+        // Delete the discount...
+        wpinv_remove_discount( $id );
 
-		/**
-		 * Fires immediately after a single discount is deleted via the REST API.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param WP_POST    $discount  The deleted discount.
-		 * @param WP_REST_Request  $request  The request sent to the API.
-		 */
-		do_action( "wpinv_rest_delete_discount", $discount, $request );
+        /**
+         * Fires immediately after a single discount is deleted via the REST API.
+         *
+         *
+         * @since 1.0.13
+         *
+         * @param WP_POST    $discount  The deleted discount.
+         * @param WP_REST_Request  $request  The request sent to the API.
+         */
+        do_action( "wpinv_rest_delete_discount", $discount, $request );
 
-		return $response;
+        return $response;
 
-	}
+    }
     
     
     /**
-	 * Retrieves the query params for the discount collection.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @return array Collection parameters.
-	 */
-	public function get_collection_params() {
+     * Retrieves the query params for the discount collection.
+     *
+     * @since 1.0.13
+     *
+     * @return array Collection parameters.
+     */
+    public function get_collection_params() {
         
         $query_params               = array(
 
@@ -558,27 +558,27 @@ 
             
             // Discount types
             'type'                  => array(
-				'description'       => __( 'Type of discounts to fetch.', 'invoicing' ),
-				'type'              => 'array',
-				'default'           => array_keys( wpinv_get_discount_types() ),
-				'items'             => array(
+                'description'       => __( 'Type of discounts to fetch.', 'invoicing' ),
+                'type'              => 'array',
+                'default'           => array_keys( wpinv_get_discount_types() ),
+                'items'             => array(
                     'enum'          => array_keys( wpinv_get_discount_types() ),
                     'type'          => 'string',
                 ),
-			),
+            ),
 			
-			// Number of results per page
+            // Number of results per page
             'limit'                 => array(
-				'description'       => __( 'Number of discounts to fetch.', 'invoicing' ),
-				'type'              => 'integer',
-				'default'           => (int) get_option( 'posts_per_page' ),
+                'description'       => __( 'Number of discounts to fetch.', 'invoicing' ),
+                'type'              => 'integer',
+                'default'           => (int) get_option( 'posts_per_page' ),
             ),
 
             // Pagination
             'page'     => array(
-				'description'       => __( 'Current page to fetch.', 'invoicing' ),
-				'type'              => 'integer',
-				'default'           => 1,
+                'description'       => __( 'Current page to fetch.', 'invoicing' ),
+                'type'              => 'integer',
+                'default'           => 1,
             ),
 
             // Exclude certain items
@@ -601,9 +601,9 @@ 
                     'date',
                     'ID',
                     'modified',
-					'title',
-					'relevance',
-					'rand'
+                    'title',
+                    'relevance',
+                    'rand'
                 ),
             ),
 
@@ -613,599 +613,599 @@ 
                 'type'        => 'string',
                 'default'     => 'DESC',
                 'enum'        => array( 'ASC', 'DESC' ),
-			),
+            ),
 			
-			// Search term
+            // Search term
             'search'                => array(
-				'description'       => __( 'Return discounts that match the search term.', 'invoicing' ),
-				'type'              => 'string',
+                'description'       => __( 'Return discounts that match the search term.', 'invoicing' ),
+                'type'              => 'string',
             ),
         );
 
-		/**
-		 * Filter collection parameters for the discounts controller.
-		 *
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param array        $query_params JSON Schema-formatted collection parameters.
-		 */
-		return apply_filters( "wpinv_rest_discounts_collection_params", $query_params );
+        /**
+         * Filter collection parameters for the discounts controller.
+         *
+         *
+         * @since 1.0.13
+         *
+         * @param array        $query_params JSON Schema-formatted collection parameters.
+         */
+        return apply_filters( "wpinv_rest_discounts_collection_params", $query_params );
     }
     
     /**
-	 * Checks if a given post type can be viewed or managed.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param object|string $post_type Post type name or object.
-	 * @return bool Whether the post type is allowed in REST.
-	 */
-	protected function check_is_post_type_allowed( $post_type ) {
-		return true;
-	}
-
-	/**
-	 * Prepares a single item for create or update.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Request object.
-	 * @return array|WP_Error Discount Properties or WP_Error.
-	 */
-	protected function prepare_item_for_database( $request ) {
-		$prepared_item 		 = new stdClass();
-		$prepared_item->meta_input = array();
-
-		// Post ID.
-		if ( isset( $request['id'] ) ) {
-			$existing_item = $this->get_post( $request['id'] );
-			if ( is_wp_error( $existing_item ) ) {
-				return $existing_item;
-			}
-
-			$prepared_item->ID 		  = $existing_item->ID;
-		}
-
-		$schema = $this->get_item_schema();
-
-		// item title.
-		if ( ! empty( $schema['properties']['title'] ) && isset( $request['title'] ) ) {
-			$prepared_item->post_title = sanitize_text_field( $request['title'] );
-		}
-
-		// item status.
-		if ( ! empty( $schema['properties']['status'] ) && isset( $request['status'] ) && in_array( $request['status'], array_keys( get_post_stati( array( 'internal' => false ) ) ) ) ) {
-			$prepared_item->post_status = sanitize_text_field( $request['status'] );
-		}
-
-		// Code.
-		if ( ! empty( $schema['properties']['code'] ) && isset( $request['code'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_code'] = trim( $request['code'] );
-		}
-
-		// Type.
-		if ( ! empty( $schema['properties']['type'] ) && isset( $request['type'] )  && in_array( $request['type'], array_keys( wpinv_get_discount_types() ) ) ) {
-			$prepared_item->meta_input['_wpi_discount_type'] = trim( $request['type'] );
-		}
-
-		// Amount.
-		if ( ! empty( $schema['properties']['amount'] ) && isset( $request['amount'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_amount'] = floatval( $request['amount'] );
-		}
-
-		// Items.
-		if ( ! empty( $schema['properties']['items'] ) && isset( $request['items'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_items'] = wpinv_parse_list( $request['items'] );
-		}
-
-		// Excluded Items.
-		if ( ! empty( $schema['properties']['exclude_items'] ) && isset( $request['exclude_items'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_excluded_items'] = wpinv_parse_list( $request['exclude_items'] );
-		}
-
-		// Start date.
-		if ( ! empty( $schema['properties']['start_date'] ) && isset( $request['start_date'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_start'] = trim( $request['start_date'] );
-		}
-
-		// End date.
-		if ( ! empty( $schema['properties']['end_date'] ) && isset( $request['end_date'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_expiration'] = trim( $request['end_date'] );
-		}
-
-		// Minimum amount.
-		if ( ! empty( $schema['properties']['minimum_amount'] ) && isset( $request['minimum_amount'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_min_total'] = floatval( $request['minimum_amount'] );
-		}
-
-		// Maximum amount.
-		if ( ! empty( $schema['properties']['maximum_amount'] ) && isset( $request['maximum_amount'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_max_total'] = floatval( $request['maximum_amount'] );
-		}
-
-		// Recurring.
-		if ( ! empty( $schema['properties']['recurring'] ) && isset( $request['recurring'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_is_recurring'] = empty( (int) $request['recurring'] ) ? 0 : 1;
-		}
-
-		// Maximum uses.
-		if ( ! empty( $schema['properties']['max_uses'] ) && isset( $request['max_uses'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_max_uses'] = intval( $request['max_uses'] );
-		}
-
-		// Single use.
-		if ( ! empty( $schema['properties']['single_use'] ) && isset( $request['single_use'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_is_single_use'] = empty( (int) $request['single_use'] ) ? 0 : 1;
-		}
-
-		$discount_data = (array) wp_unslash( $prepared_item );
-
-		/**
-		 * Filters an item before it is inserted via the REST API.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param array        $discount_data An array of discount data
-		 * @param WP_REST_Request $request       Request object.
-		 */
-		return apply_filters( "wpinv_rest_pre_insert_discount", $discount_data, $request );
-
-	}
-
-	/**
-	 * Prepares a single discount output for response.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_Post   $discount    WP_Post object.
-	 * @param WP_REST_Request $request Request object.
-	 * @return WP_REST_Response Response object.
-	 */
-	public function prepare_item_for_response( $discount, $request ) {
-
-		$GLOBALS['post'] = get_post( $discount->ID );
-
-		setup_postdata( $discount->ID );
-
-		// Fetch the fields to include in this response.
-		$fields = $this->get_fields_for_response( $request );
-
-		// Base fields for every discount.
-		$data = array();
-
-		// Set up ID.
-		if ( rest_is_field_included( 'id', $fields ) ) {
-			$data['id'] = $discount->ID;
-		}
-
-		// Title.
-		if ( rest_is_field_included( 'title', $fields ) ) {
-			$data['title'] = get_the_title( $discount->ID );
-		}
-
-		// Code.
-		if ( rest_is_field_included( 'code', $fields ) ) {
-			$data['code'] = wpinv_get_discount_code( $discount->ID );
-		}
-
-		// Type.
-		if ( rest_is_field_included( 'type', $fields ) ) {
-			$data['type'] = wpinv_get_discount_type( $discount->ID );
-		}
-
-		// Amount.
-		if ( rest_is_field_included( 'amount', $fields ) ) {
-			$data['amount'] = wpinv_get_discount_amount( $discount->ID );
-		}
-
-		// Status.
-		if ( rest_is_field_included( 'status', $fields ) ) {
-			$data['status'] = get_post_status( $discount->ID );
-		}
-
-		// Items.
-		if ( rest_is_field_included( 'items', $fields ) ) {
-			$data['items'] = wpinv_get_discount_item_reqs( $discount->ID );
-		}
-
-		// Excluded Items.
-		if ( rest_is_field_included( 'exclude_items', $fields ) ) {
-			$data['exclude_items'] = wpinv_get_discount_excluded_items( $discount->ID );
-		}
-
-		// Start date.
-		if ( rest_is_field_included( 'start_date', $fields ) ) {
-			$data['start_date'] = wpinv_get_discount_start_date( $discount->ID );
-		}
-
-		// End date.
-		if ( rest_is_field_included( 'end_date', $fields ) ) {
-			$data['end_date'] = wpinv_get_discount_expiration( $discount->ID );
-		}
-
-		// Minimum amount.
-		if ( rest_is_field_included( 'minimum_amount', $fields ) ) {
-			$data['minimum_amount'] = wpinv_get_discount_min_total( $discount->ID );
-		}
-
-		// Maximum amount.
-		if ( rest_is_field_included( 'maximum_amount', $fields ) ) {
-			$data['maximum_amount'] = wpinv_get_discount_max_total( $discount->ID );
-		}
-
-		// Recurring.
-		if ( rest_is_field_included( 'recurring', $fields ) ) {
-			$data['recurring'] = wpinv_discount_is_recurring( $discount->ID );
-		}
-
-		// Maximum uses.
-		if ( rest_is_field_included( 'max_uses', $fields ) ) {
-			$data['max_uses'] = wpinv_get_discount_max_uses( $discount->ID );
-		}
-
-		// Single use.
-		if ( rest_is_field_included( 'single_use', $fields ) ) {
-			$data['single_use'] = wpinv_discount_is_single_use( $discount->ID );
-		}
-
-		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
-		$data    = $this->add_additional_fields_to_object( $data, $request );
-		$data    = $this->filter_response_by_context( $data, $context );
-
-		// Wrap the data in a response object.
-		$response = rest_ensure_response( $data );
-
-		$links = $this->prepare_links( $discount );
-		$response->add_links( $links );
-
-		if ( ! empty( $links['self']['href'] ) ) {
-			$actions = $this->get_available_actions( $discount, $request );
-
-			$self = $links['self']['href'];
-
-			foreach ( $actions as $rel ) {
-				$response->add_link( $rel, $self );
-			}
-		}
-
-		/**
-		 * Filters the discount data for a response.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param WP_REST_Response $response The response object.
-		 * @param WP_Post    $discount  The discount post object.
-		 * @param WP_REST_Request  $request  Request object.
-		 */
-		return apply_filters( "wpinv_rest_prepare_discount", $response, $discount, $request );
-	}
-
-	/**
-	 * Gets an array of fields to be included on the response.
-	 *
-	 * Included fields are based on item schema and `_fields=` request argument.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_REST_Request $request Full details about the request.
-	 * @return array Fields to be included in the response.
-	 */
-	public function get_fields_for_response( $request ) {
-		$schema     = $this->get_item_schema();
-		$properties = isset( $schema['properties'] ) ? $schema['properties'] : array();
-
-		$additional_fields = $this->get_additional_fields();
-		foreach ( $additional_fields as $field_name => $field_options ) {
-			// For back-compat, include any field with an empty schema
-			// because it won't be present in $this->get_item_schema().
-			if ( is_null( $field_options['schema'] ) ) {
-				$properties[ $field_name ] = $field_options;
-			}
-		}
-
-		// Exclude fields that specify a different context than the request context.
-		$context = $request['context'];
-		if ( $context ) {
-			foreach ( $properties as $name => $options ) {
-				if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) {
-					unset( $properties[ $name ] );
-				}
-			}
-		}
-
-		$fields = array_keys( $properties );
-
-		if ( ! isset( $request['_fields'] ) ) {
-			return $fields;
-		}
-		$requested_fields = wpinv_parse_list( $request['_fields'] );
-		if ( 0 === count( $requested_fields ) ) {
-			return $fields;
-		}
-		// Trim off outside whitespace from the comma delimited list.
-		$requested_fields = array_map( 'trim', $requested_fields );
-		// Always persist 'id', because it can be needed for add_additional_fields_to_object().
-		if ( in_array( 'id', $fields, true ) ) {
-			$requested_fields[] = 'id';
-		}
-		// Return the list of all requested fields which appear in the schema.
-		return array_reduce(
-			$requested_fields,
-			function( $response_fields, $field ) use ( $fields ) {
-				if ( in_array( $field, $fields, true ) ) {
-					$response_fields[] = $field;
-					return $response_fields;
-				}
-				// Check for nested fields if $field is not a direct match.
-				$nested_fields = explode( '.', $field );
-				// A nested field is included so long as its top-level property is
-				// present in the schema.
-				if ( in_array( $nested_fields[0], $fields, true ) ) {
-					$response_fields[] = $field;
-				}
-				return $response_fields;
-			},
-			array()
-		);
-	}
-
-	/**
-	 * Retrieves the discount's schema, conforming to JSON Schema.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @return array Discount schema data.
-	 */
-	public function get_item_schema() {
-
-		// Maybe retrieve the schema from cache.
-		if ( $this->schema ) {
-			return $this->add_additional_fields_schema( $this->schema );
-		}
-
-		$schema = array(
-			'$schema'    => 'http://json-schema.org/draft-04/schema#',
-			'title'      => $this->post_type,
-			'type'       => 'object',
-
-			// Base properties for every Item.
-			'properties' 		  => array(
-
-				'id'           => array(
-					'description' => __( 'Unique identifier for the discount.', 'invoicing' ),
-					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
-					'readonly'    => true,
-				),
-
-				'title'			  => array(
-					'description' => __( 'The title for the discount.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit' ),
-				),
-
-				'code'        => array(
-					'description' => __( 'The discount code.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
-					'required'	  => true,
-				),
-
-				'type'        => array(
-					'description' => __( 'The type of discount.', 'invoicing' ),
-					'type'        => 'string',
-					'enum'        => array_keys( wpinv_get_discount_types() ),
-					'context'     => array( 'view', 'edit', 'embed' ),
-					'default'	  => 'percentage',
-				),
-
-				'amount'        => array(
-					'description' => __( 'The discount value.', 'invoicing' ),
-					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
-					'required'	  => true,
-				),
-
-				'status'       => array(
-					'description' => __( 'A named status for the discount.', 'invoicing' ),
-					'type'        => 'string',
-					'enum'        => array_keys( get_post_stati( array( 'internal' => false ) ) ),
-					'context'     => array( 'view', 'edit' ),
-				),
-
-				'items'       => array(
-					'description' => __( 'Items which need to be in the cart to use this discount or, for "Item Discounts", which items are discounted. If left blank, this discount will be used on any item.', 'invoicing' ),
-					'type'        => 'array',
-					'context'     => array( 'view', 'edit' ),
-				),
-
-				'exclude_items'   => array(
-					'description' => __( 'Items which are NOT allowed to use this discount.', 'invoicing' ),
-					'type'        => 'array',
-					'context'     => array( 'view', 'edit' ),
-				),
-
-				'start_date'       => array(
-					'description' => __( 'The start date for the discount in the format of yyyy-mm-dd hh:mm:ss  . If provided, the discount can only be used after or on this date.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit' ),
-				),
-
-				'end_date'        => array(
-					'description' => __( 'The expiration date for the discount.', 'invoicing' ),
-					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
+     * Checks if a given post type can be viewed or managed.
+     *
+     * @since 1.0.13
+     *
+     * @param object|string $post_type Post type name or object.
+     * @return bool Whether the post type is allowed in REST.
+     */
+    protected function check_is_post_type_allowed( $post_type ) {
+        return true;
+    }
+
+    /**
+     * Prepares a single item for create or update.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Request object.
+     * @return array|WP_Error Discount Properties or WP_Error.
+     */
+    protected function prepare_item_for_database( $request ) {
+        $prepared_item 		 = new stdClass();
+        $prepared_item->meta_input = array();
+
+        // Post ID.
+        if ( isset( $request['id'] ) ) {
+            $existing_item = $this->get_post( $request['id'] );
+            if ( is_wp_error( $existing_item ) ) {
+                return $existing_item;
+            }
+
+            $prepared_item->ID 		  = $existing_item->ID;
+        }
+
+        $schema = $this->get_item_schema();
+
+        // item title.
+        if ( ! empty( $schema['properties']['title'] ) && isset( $request['title'] ) ) {
+            $prepared_item->post_title = sanitize_text_field( $request['title'] );
+        }
+
+        // item status.
+        if ( ! empty( $schema['properties']['status'] ) && isset( $request['status'] ) && in_array( $request['status'], array_keys( get_post_stati( array( 'internal' => false ) ) ) ) ) {
+            $prepared_item->post_status = sanitize_text_field( $request['status'] );
+        }
+
+        // Code.
+        if ( ! empty( $schema['properties']['code'] ) && isset( $request['code'] ) ) {
+            $prepared_item->meta_input['_wpi_discount_code'] = trim( $request['code'] );
+        }
+
+        // Type.
+        if ( ! empty( $schema['properties']['type'] ) && isset( $request['type'] )  && in_array( $request['type'], array_keys( wpinv_get_discount_types() ) ) ) {
+            $prepared_item->meta_input['_wpi_discount_type'] = trim( $request['type'] );
+        }
+
+        // Amount.
+        if ( ! empty( $schema['properties']['amount'] ) && isset( $request['amount'] ) ) {
+            $prepared_item->meta_input['_wpi_discount_amount'] = floatval( $request['amount'] );
+        }
+
+        // Items.
+        if ( ! empty( $schema['properties']['items'] ) && isset( $request['items'] ) ) {
+            $prepared_item->meta_input['_wpi_discount_items'] = wpinv_parse_list( $request['items'] );
+        }
+
+        // Excluded Items.
+        if ( ! empty( $schema['properties']['exclude_items'] ) && isset( $request['exclude_items'] ) ) {
+            $prepared_item->meta_input['_wpi_discount_excluded_items'] = wpinv_parse_list( $request['exclude_items'] );
+        }
+
+        // Start date.
+        if ( ! empty( $schema['properties']['start_date'] ) && isset( $request['start_date'] ) ) {
+            $prepared_item->meta_input['_wpi_discount_start'] = trim( $request['start_date'] );
+        }
+
+        // End date.
+        if ( ! empty( $schema['properties']['end_date'] ) && isset( $request['end_date'] ) ) {
+            $prepared_item->meta_input['_wpi_discount_expiration'] = trim( $request['end_date'] );
+        }
+
+        // Minimum amount.
+        if ( ! empty( $schema['properties']['minimum_amount'] ) && isset( $request['minimum_amount'] ) ) {
+            $prepared_item->meta_input['_wpi_discount_min_total'] = floatval( $request['minimum_amount'] );
+        }
+
+        // Maximum amount.
+        if ( ! empty( $schema['properties']['maximum_amount'] ) && isset( $request['maximum_amount'] ) ) {
+            $prepared_item->meta_input['_wpi_discount_max_total'] = floatval( $request['maximum_amount'] );
+        }
+
+        // Recurring.
+        if ( ! empty( $schema['properties']['recurring'] ) && isset( $request['recurring'] ) ) {
+            $prepared_item->meta_input['_wpi_discount_is_recurring'] = empty( (int) $request['recurring'] ) ? 0 : 1;
+        }
+
+        // Maximum uses.
+        if ( ! empty( $schema['properties']['max_uses'] ) && isset( $request['max_uses'] ) ) {
+            $prepared_item->meta_input['_wpi_discount_max_uses'] = intval( $request['max_uses'] );
+        }
+
+        // Single use.
+        if ( ! empty( $schema['properties']['single_use'] ) && isset( $request['single_use'] ) ) {
+            $prepared_item->meta_input['_wpi_discount_is_single_use'] = empty( (int) $request['single_use'] ) ? 0 : 1;
+        }
+
+        $discount_data = (array) wp_unslash( $prepared_item );
+
+        /**
+         * Filters an item before it is inserted via the REST API.
+         *
+         * @since 1.0.13
+         *
+         * @param array        $discount_data An array of discount data
+         * @param WP_REST_Request $request       Request object.
+         */
+        return apply_filters( "wpinv_rest_pre_insert_discount", $discount_data, $request );
+
+    }
+
+    /**
+     * Prepares a single discount output for response.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_Post   $discount    WP_Post object.
+     * @param WP_REST_Request $request Request object.
+     * @return WP_REST_Response Response object.
+     */
+    public function prepare_item_for_response( $discount, $request ) {
+
+        $GLOBALS['post'] = get_post( $discount->ID );
+
+        setup_postdata( $discount->ID );
+
+        // Fetch the fields to include in this response.
+        $fields = $this->get_fields_for_response( $request );
+
+        // Base fields for every discount.
+        $data = array();
+
+        // Set up ID.
+        if ( rest_is_field_included( 'id', $fields ) ) {
+            $data['id'] = $discount->ID;
+        }
+
+        // Title.
+        if ( rest_is_field_included( 'title', $fields ) ) {
+            $data['title'] = get_the_title( $discount->ID );
+        }
+
+        // Code.
+        if ( rest_is_field_included( 'code', $fields ) ) {
+            $data['code'] = wpinv_get_discount_code( $discount->ID );
+        }
+
+        // Type.
+        if ( rest_is_field_included( 'type', $fields ) ) {
+            $data['type'] = wpinv_get_discount_type( $discount->ID );
+        }
+
+        // Amount.
+        if ( rest_is_field_included( 'amount', $fields ) ) {
+            $data['amount'] = wpinv_get_discount_amount( $discount->ID );
+        }
+
+        // Status.
+        if ( rest_is_field_included( 'status', $fields ) ) {
+            $data['status'] = get_post_status( $discount->ID );
+        }
+
+        // Items.
+        if ( rest_is_field_included( 'items', $fields ) ) {
+            $data['items'] = wpinv_get_discount_item_reqs( $discount->ID );
+        }
+
+        // Excluded Items.
+        if ( rest_is_field_included( 'exclude_items', $fields ) ) {
+            $data['exclude_items'] = wpinv_get_discount_excluded_items( $discount->ID );
+        }
+
+        // Start date.
+        if ( rest_is_field_included( 'start_date', $fields ) ) {
+            $data['start_date'] = wpinv_get_discount_start_date( $discount->ID );
+        }
+
+        // End date.
+        if ( rest_is_field_included( 'end_date', $fields ) ) {
+            $data['end_date'] = wpinv_get_discount_expiration( $discount->ID );
+        }
+
+        // Minimum amount.
+        if ( rest_is_field_included( 'minimum_amount', $fields ) ) {
+            $data['minimum_amount'] = wpinv_get_discount_min_total( $discount->ID );
+        }
+
+        // Maximum amount.
+        if ( rest_is_field_included( 'maximum_amount', $fields ) ) {
+            $data['maximum_amount'] = wpinv_get_discount_max_total( $discount->ID );
+        }
+
+        // Recurring.
+        if ( rest_is_field_included( 'recurring', $fields ) ) {
+            $data['recurring'] = wpinv_discount_is_recurring( $discount->ID );
+        }
+
+        // Maximum uses.
+        if ( rest_is_field_included( 'max_uses', $fields ) ) {
+            $data['max_uses'] = wpinv_get_discount_max_uses( $discount->ID );
+        }
+
+        // Single use.
+        if ( rest_is_field_included( 'single_use', $fields ) ) {
+            $data['single_use'] = wpinv_discount_is_single_use( $discount->ID );
+        }
+
+        $context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+        $data    = $this->add_additional_fields_to_object( $data, $request );
+        $data    = $this->filter_response_by_context( $data, $context );
+
+        // Wrap the data in a response object.
+        $response = rest_ensure_response( $data );
+
+        $links = $this->prepare_links( $discount );
+        $response->add_links( $links );
+
+        if ( ! empty( $links['self']['href'] ) ) {
+            $actions = $this->get_available_actions( $discount, $request );
+
+            $self = $links['self']['href'];
+
+            foreach ( $actions as $rel ) {
+                $response->add_link( $rel, $self );
+            }
+        }
+
+        /**
+         * Filters the discount data for a response.
+         *
+         * @since 1.0.13
+         *
+         * @param WP_REST_Response $response The response object.
+         * @param WP_Post    $discount  The discount post object.
+         * @param WP_REST_Request  $request  Request object.
+         */
+        return apply_filters( "wpinv_rest_prepare_discount", $response, $discount, $request );
+    }
+
+    /**
+     * Gets an array of fields to be included on the response.
+     *
+     * Included fields are based on item schema and `_fields=` request argument.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_REST_Request $request Full details about the request.
+     * @return array Fields to be included in the response.
+     */
+    public function get_fields_for_response( $request ) {
+        $schema     = $this->get_item_schema();
+        $properties = isset( $schema['properties'] ) ? $schema['properties'] : array();
+
+        $additional_fields = $this->get_additional_fields();
+        foreach ( $additional_fields as $field_name => $field_options ) {
+            // For back-compat, include any field with an empty schema
+            // because it won't be present in $this->get_item_schema().
+            if ( is_null( $field_options['schema'] ) ) {
+                $properties[ $field_name ] = $field_options;
+            }
+        }
+
+        // Exclude fields that specify a different context than the request context.
+        $context = $request['context'];
+        if ( $context ) {
+            foreach ( $properties as $name => $options ) {
+                if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) {
+                    unset( $properties[ $name ] );
+                }
+            }
+        }
+
+        $fields = array_keys( $properties );
+
+        if ( ! isset( $request['_fields'] ) ) {
+            return $fields;
+        }
+        $requested_fields = wpinv_parse_list( $request['_fields'] );
+        if ( 0 === count( $requested_fields ) ) {
+            return $fields;
+        }
+        // Trim off outside whitespace from the comma delimited list.
+        $requested_fields = array_map( 'trim', $requested_fields );
+        // Always persist 'id', because it can be needed for add_additional_fields_to_object().
+        if ( in_array( 'id', $fields, true ) ) {
+            $requested_fields[] = 'id';
+        }
+        // Return the list of all requested fields which appear in the schema.
+        return array_reduce(
+            $requested_fields,
+            function( $response_fields, $field ) use ( $fields ) {
+                if ( in_array( $field, $fields, true ) ) {
+                    $response_fields[] = $field;
+                    return $response_fields;
+                }
+                // Check for nested fields if $field is not a direct match.
+                $nested_fields = explode( '.', $field );
+                // A nested field is included so long as its top-level property is
+                // present in the schema.
+                if ( in_array( $nested_fields[0], $fields, true ) ) {
+                    $response_fields[] = $field;
+                }
+                return $response_fields;
+            },
+            array()
+        );
+    }
+
+    /**
+     * Retrieves the discount's schema, conforming to JSON Schema.
+     *
+     * @since 1.0.13
+     *
+     * @return array Discount schema data.
+     */
+    public function get_item_schema() {
+
+        // Maybe retrieve the schema from cache.
+        if ( $this->schema ) {
+            return $this->add_additional_fields_schema( $this->schema );
+        }
+
+        $schema = array(
+            '$schema'    => 'http://json-schema.org/draft-04/schema#',
+            'title'      => $this->post_type,
+            'type'       => 'object',
+
+            // Base properties for every Item.
+            'properties' 		  => array(
+
+                'id'           => array(
+                    'description' => __( 'Unique identifier for the discount.', 'invoicing' ),
+                    'type'        => 'integer',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                    'readonly'    => true,
+                ),
+
+                'title'			  => array(
+                    'description' => __( 'The title for the discount.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit' ),
+                ),
+
+                'code'        => array(
+                    'description' => __( 'The discount code.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                    'required'	  => true,
+                ),
+
+                'type'        => array(
+                    'description' => __( 'The type of discount.', 'invoicing' ),
+                    'type'        => 'string',
+                    'enum'        => array_keys( wpinv_get_discount_types() ),
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                    'default'	  => 'percentage',
+                ),
+
+                'amount'        => array(
+                    'description' => __( 'The discount value.', 'invoicing' ),
+                    'type'        => 'number',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                    'required'	  => true,
+                ),
+
+                'status'       => array(
+                    'description' => __( 'A named status for the discount.', 'invoicing' ),
+                    'type'        => 'string',
+                    'enum'        => array_keys( get_post_stati( array( 'internal' => false ) ) ),
+                    'context'     => array( 'view', 'edit' ),
+                ),
+
+                'items'       => array(
+                    'description' => __( 'Items which need to be in the cart to use this discount or, for "Item Discounts", which items are discounted. If left blank, this discount will be used on any item.', 'invoicing' ),
+                    'type'        => 'array',
+                    'context'     => array( 'view', 'edit' ),
+                ),
+
+                'exclude_items'   => array(
+                    'description' => __( 'Items which are NOT allowed to use this discount.', 'invoicing' ),
+                    'type'        => 'array',
+                    'context'     => array( 'view', 'edit' ),
+                ),
+
+                'start_date'       => array(
+                    'description' => __( 'The start date for the discount in the format of yyyy-mm-dd hh:mm:ss  . If provided, the discount can only be used after or on this date.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit' ),
+                ),
+
+                'end_date'        => array(
+                    'description' => __( 'The expiration date for the discount.', 'invoicing' ),
+                    'type'        => 'string',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
 				
-				'minimum_amount'       => array(
-					'description' => __( 'Minimum amount needed to use this invoice.', 'invoicing' ),
-					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'maximum_amount'       => array(
-					'description' => __( 'Maximum amount needed to use this invoice.', 'invoicing' ),
-					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'recurring'       => array(
-					'description' => __( 'Whether the discount is applied to all recurring payments or only the first recurring payment.', 'invoicing' ),
-					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'max_uses'        => array(
-					'description' => __( 'The maximum number of times this discount code can be used.', 'invoicing' ),
-					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				),
-
-				'single_use'       => array(
-					'description' => __( 'Whether or not this discount can only be used once per user.', 'invoicing' ),
-					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
-				)
-
-			),
-		);
-
-		// Add helpful links to the discount schem.
-		$schema['links'] = $this->get_schema_links();
-
-		/**
-		 * Filters the discount schema for the REST API.
-		 *
-		 * Enables adding extra properties to discounts.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param array   $schema    The discount schema.
-		 */
+                'minimum_amount'       => array(
+                    'description' => __( 'Minimum amount needed to use this invoice.', 'invoicing' ),
+                    'type'        => 'number',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'maximum_amount'       => array(
+                    'description' => __( 'Maximum amount needed to use this invoice.', 'invoicing' ),
+                    'type'        => 'number',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'recurring'       => array(
+                    'description' => __( 'Whether the discount is applied to all recurring payments or only the first recurring payment.', 'invoicing' ),
+                    'type'        => 'integer',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'max_uses'        => array(
+                    'description' => __( 'The maximum number of times this discount code can be used.', 'invoicing' ),
+                    'type'        => 'number',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                ),
+
+                'single_use'       => array(
+                    'description' => __( 'Whether or not this discount can only be used once per user.', 'invoicing' ),
+                    'type'        => 'integer',
+                    'context'     => array( 'view', 'edit', 'embed' ),
+                )
+
+            ),
+        );
+
+        // Add helpful links to the discount schem.
+        $schema['links'] = $this->get_schema_links();
+
+        /**
+         * Filters the discount schema for the REST API.
+         *
+         * Enables adding extra properties to discounts.
+         *
+         * @since 1.0.13
+         *
+         * @param array   $schema    The discount schema.
+         */
         $schema = apply_filters( "wpinv_rest_discount_schema", $schema );
 
-		//  Cache the discount schema.
-		$this->schema = $schema;
+        //  Cache the discount schema.
+        $this->schema = $schema;
 		
-		return $this->add_additional_fields_schema( $this->schema );
-	}
-
-	/**
-	 * Retrieve Link Description Objects that should be added to the Schema for the discounts collection.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @return array
-	 */
-	protected function get_schema_links() {
-
-		$href = rest_url( "{$this->namespace}/{$this->rest_base}/{id}" );
-
-		$links = array();
-
-		$links[] = array(
-			'rel'          => 'https://api.w.org/action-publish',
-			'title'        => __( 'The current user can publish this discount.' ),
-			'href'         => $href,
-			'targetSchema' => array(
-				'type'       => 'object',
-				'properties' => array(
-					'status' => array(
-						'type' => 'string',
-						'enum' => array( 'publish', 'future' ),
-					),
-				),
-			),
-		);
-
-		return $links;
-	}
-
-	/**
-	 * Prepares links for the request.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_Post $discount Post Object.
-	 * @return array Links for the given discount.
-	 */
-	protected function prepare_links( $discount ) {
-
-		// Prepare the base REST API endpoint for discounts.
-		$base = sprintf( '%s/%s', $this->namespace, $this->rest_base );
-
-		// Entity meta.
-		$links = array(
-			'self'       => array(
-				'href' => rest_url( trailingslashit( $base ) . $discount->ID ),
-			),
-			'collection' => array(
-				'href' => rest_url( $base ),
-			),
-		);
-
-		/**
-		 * Filters the returned discount links for the REST API.
-		 *
-		 * Enables adding extra links to discount API responses.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param array   $links    Rest links.
-		 */
-		return apply_filters( "wpinv_rest_discount_links", $links );
-
-	}
-
-	/**
-	 * Get the link relations available for the post and current user.
-	 *
-	 * @since 1.0.13
-	 *
-	 * @param WP_Post   $discount    WP_Post object.
-	 * @param WP_REST_Request $request Request object.
-	 * @return array List of link relations.
-	 */
-	protected function get_available_actions( $discount, $request ) {
-
-		if ( 'edit' !== $request['context'] ) {
-			return array();
-		}
-
-		$rels = array();
-
-		// Retrieve the post type object.
-		$post_type = get_post_type_object( $discount->post_type );
-
-		// Mark discount as published.
-		if ( current_user_can( $post_type->cap->publish_posts ) ) {
-			$rels[] = 'https://api.w.org/action-publish';
-		}
-
-		/**
-		 * Filters the available discount link relations for the REST API.
-		 *
-		 * Enables adding extra link relation for the current user and request to discount responses.
-		 *
-		 * @since 1.0.13
-		 *
-		 * @param array   $rels    Available link relations.
-		 */
-		return apply_filters( "wpinv_rest_discount_link_relations", $rels );
-	}
-
-	/**
-	 * Handles rest requests for discount types.
-	 *
-	 * @since 1.0.13
-	 * 
-	 * 
-	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
-	 */
-	public function get_discount_types() {
-		return rest_ensure_response( wpinv_get_discount_types() );
-	}
+        return $this->add_additional_fields_schema( $this->schema );
+    }
+
+    /**
+     * Retrieve Link Description Objects that should be added to the Schema for the discounts collection.
+     *
+     * @since 1.0.13
+     *
+     * @return array
+     */
+    protected function get_schema_links() {
+
+        $href = rest_url( "{$this->namespace}/{$this->rest_base}/{id}" );
+
+        $links = array();
+
+        $links[] = array(
+            'rel'          => 'https://api.w.org/action-publish',
+            'title'        => __( 'The current user can publish this discount.' ),
+            'href'         => $href,
+            'targetSchema' => array(
+                'type'       => 'object',
+                'properties' => array(
+                    'status' => array(
+                        'type' => 'string',
+                        'enum' => array( 'publish', 'future' ),
+                    ),
+                ),
+            ),
+        );
+
+        return $links;
+    }
+
+    /**
+     * Prepares links for the request.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_Post $discount Post Object.
+     * @return array Links for the given discount.
+     */
+    protected function prepare_links( $discount ) {
+
+        // Prepare the base REST API endpoint for discounts.
+        $base = sprintf( '%s/%s', $this->namespace, $this->rest_base );
+
+        // Entity meta.
+        $links = array(
+            'self'       => array(
+                'href' => rest_url( trailingslashit( $base ) . $discount->ID ),
+            ),
+            'collection' => array(
+                'href' => rest_url( $base ),
+            ),
+        );
+
+        /**
+         * Filters the returned discount links for the REST API.
+         *
+         * Enables adding extra links to discount API responses.
+         *
+         * @since 1.0.13
+         *
+         * @param array   $links    Rest links.
+         */
+        return apply_filters( "wpinv_rest_discount_links", $links );
+
+    }
+
+    /**
+     * Get the link relations available for the post and current user.
+     *
+     * @since 1.0.13
+     *
+     * @param WP_Post   $discount    WP_Post object.
+     * @param WP_REST_Request $request Request object.
+     * @return array List of link relations.
+     */
+    protected function get_available_actions( $discount, $request ) {
+
+        if ( 'edit' !== $request['context'] ) {
+            return array();
+        }
+
+        $rels = array();
+
+        // Retrieve the post type object.
+        $post_type = get_post_type_object( $discount->post_type );
+
+        // Mark discount as published.
+        if ( current_user_can( $post_type->cap->publish_posts ) ) {
+            $rels[] = 'https://api.w.org/action-publish';
+        }
+
+        /**
+         * Filters the available discount link relations for the REST API.
+         *
+         * Enables adding extra link relation for the current user and request to discount responses.
+         *
+         * @since 1.0.13
+         *
+         * @param array   $rels    Available link relations.
+         */
+        return apply_filters( "wpinv_rest_discount_link_relations", $rels );
+    }
+
+    /**
+     * Handles rest requests for discount types.
+     *
+     * @since 1.0.13
+     * 
+     * 
+     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+     */
+    public function get_discount_types() {
+        return rest_ensure_response( wpinv_get_discount_types() );
+    }
 
     
 }
\ No newline at end of file

Spacing +261 added lines, -261 removed lines

@@ -8,7 +8,7 @@ 
  * @since    1.0.13
  */
 
-if ( !defined( 'WPINC' ) ) {
+if (!defined('WPINC')) {
     exit;
 }
 
@@ -41,7 +41,7 @@ 
 	 *
 	 * @param string $namespace Api Namespace
 	 */
-	public function __construct( $namespace ) {
+	public function __construct($namespace) {
         
         // Set api namespace...
 		$this->namespace = $namespace;
@@ -68,7 +68,7 @@ 
 			array(
 				array(
 					'methods'             => WP_REST_Server::READABLE,
-					'callback'            => array( $this, 'get_discount_types' ),
+					'callback'            => array($this, 'get_discount_types'),
 				),
 			)
 		);
@@ -84,13 +84,13 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return true|WP_Error True if the request has read access, WP_Error object otherwise.
 	 */
-	public function get_items_permissions_check( $request ) {
+	public function get_items_permissions_check($request) {
 	
-		if ( wpinv_current_user_can_manage_invoicing() ) {
+		if (wpinv_current_user_can_manage_invoicing()) {
 			return true;
 		}
 
-		return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to view invoice discounts.', 'invoicing' ), array( 'status' => rest_authorization_required_code() ) );
+		return new WP_Error('rest_forbidden_context', __('Sorry, you are not allowed to view invoice discounts.', 'invoicing'), array('status' => rest_authorization_required_code()));
 
     }
     
@@ -102,17 +102,17 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
-	public function get_items( $request ) {
+	public function get_items($request) {
 		
 		// Retrieve the list of registered item query parameters.
         $registered = $this->get_collection_params();
         
         $args       = array();
 
-        foreach( array_keys( $registered ) as $key ) {
+        foreach (array_keys($registered) as $key) {
 
-            if( isset( $request[ $key] ) ) {
-                $args[ $key ] = $request[ $key];
+            if (isset($request[$key])) {
+                $args[$key] = $request[$key];
             }
 
 		} 
@@ -127,28 +127,28 @@ 
 		 * @param array           $args    Key value array of query var to query value.
 		 * @param WP_REST_Request $request The request used.
 		 */
-        $args       = apply_filters( "wpinv_rest_get_discounts_arguments", $args, $request, $this );
+        $args = apply_filters("wpinv_rest_get_discounts_arguments", $args, $request, $this);
 		
 		// Special args
-		$args[ 'return' ]   = 'objects';
-		$args[ 'paginate' ] = true;
+		$args['return']   = 'objects';
+		$args['paginate'] = true;
 
         // Run the query.
-		$query = wpinv_get_all_discounts( $args );
+		$query = wpinv_get_all_discounts($args);
 		
 		// Prepare the retrieved discounts
 		$discounts = array();
-		foreach( $query->discounts as $discount ) {
+		foreach ($query->discounts as $discount) {
 
-			$data       = $this->prepare_item_for_response( $discount, $request );
-			$discounts[]    = $this->prepare_response_for_collection( $data );
+			$data = $this->prepare_item_for_response($discount, $request);
+			$discounts[] = $this->prepare_response_for_collection($data);
 
 		}
 
 		// Prepare the response.
-		$response = rest_ensure_response( $discounts );
-		$response->header( 'X-WP-Total', (int) $query->total );
-		$response->header( 'X-WP-TotalPages', (int) $query->max_num_pages );
+		$response = rest_ensure_response($discounts);
+		$response->header('X-WP-Total', (int) $query->total);
+		$response->header('X-WP-TotalPages', (int) $query->max_num_pages);
 
 		/**
 		 * Filters the responses for discount requests.
@@ -161,9 +161,9 @@ 
 		 * @param WP_REST_Request     $request The request used.
          * @param array               $args Array of args used to retrieve the discounts
 		 */
-        $response       = apply_filters( "wpinv_rest_discounts_response", $response, $request, $args );
+        $response = apply_filters("wpinv_rest_discounts_response", $response, $request, $args);
 
-        return rest_ensure_response( $response );
+        return rest_ensure_response($response);
         
     }
 
@@ -175,17 +175,17 @@ 
 	 * @param int $discount_id Supplied ID.
 	 * @return WPInv_Item|WP_Error Item object if ID is valid, WP_Error otherwise.
 	 */
-	protected function get_post( $discount_id ) {
+	protected function get_post($discount_id) {
 		
-		$error     = new WP_Error( 'rest_item_invalid_id', __( 'Invalid discount ID.', 'invoicing' ), array( 'status' => 404 ) );
+		$error = new WP_Error('rest_item_invalid_id', __('Invalid discount ID.', 'invoicing'), array('status' => 404));
 
         // Ids start from 1
-        if ( (int) $discount_id <= 0 ) {
+        if ((int) $discount_id <= 0) {
 			return $error;
 		}
 
-		$discount = wpinv_get_discount( (int) $discount_id );
-		if ( empty( $discount ) ) {
+		$discount = wpinv_get_discount((int) $discount_id);
+		if (empty($discount)) {
 			return $error;
         }
 
@@ -201,20 +201,20 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return bool|WP_Error True if the request has read access for the invoice item, WP_Error object otherwise.
 	 */
-	public function get_item_permissions_check( $request ) {
+	public function get_item_permissions_check($request) {
 
         // Retrieve the discount object.
-        $discount = $this->get_post( $request['id'] );
+        $discount = $this->get_post($request['id']);
         
         // Ensure it is valid.
-		if ( is_wp_error( $discount ) ) {
+		if (is_wp_error($discount)) {
 			return $discount;
 		}
 
-		if ( ! wpinv_current_user_can_manage_invoicing() ) {
+		if (!wpinv_current_user_can_manage_invoicing()) {
 			return new WP_Error(
                 'rest_cannot_view', 
-                __( 'Sorry, you are not allowed to view this discount.', 'invoicing' ), 
+                __('Sorry, you are not allowed to view this discount.', 'invoicing'), 
                 array( 
                     'status' => rest_authorization_required_code(),
                 )
@@ -232,18 +232,18 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
-	public function get_item( $request ) {
+	public function get_item($request) {
 
         // Fetch the discount.
-        $discount = $this->get_post( $request['id'] );
+        $discount = $this->get_post($request['id']);
         
         // Abort early if it does not exist
-		if ( is_wp_error( $discount ) ) {
+		if (is_wp_error($discount)) {
 			return $discount;
 		}
 
 		// Prepare the response
-		$response = $this->prepare_item_for_response( $discount, $request );
+		$response = $this->prepare_item_for_response($discount, $request);
 
 		/**
 		 * Filters the responses for single discount requests.
@@ -255,9 +255,9 @@ 
 		 * @param WP_HTTP_Response $response Response.
 		 * @param WP_REST_Request  $request The request used.
 		 */
-        $response       = apply_filters( "wpinv_rest_get_discount_response", $response, $request );
+        $response = apply_filters("wpinv_rest_get_discount_response", $response, $request);
 
-        return rest_ensure_response( $response );
+        return rest_ensure_response($response);
 
     }
     
@@ -269,21 +269,21 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return true|WP_Error True if the request has access to create items, WP_Error object otherwise.
 	 */
-	public function create_item_permissions_check( $request ) {
+	public function create_item_permissions_check($request) {
 	
-		if ( ! empty( $request['id'] ) ) {
-			return new WP_Error( 'rest_item_exists', __( 'Cannot create existing item.', 'invoicing' ), array( 'status' => 400 ) );
+		if (!empty($request['id'])) {
+			return new WP_Error('rest_item_exists', __('Cannot create existing item.', 'invoicing'), array('status' => 400));
 		}
 
-		if ( wpinv_current_user_can_manage_invoicing() ) {
+		if (wpinv_current_user_can_manage_invoicing()) {
 			return true;
 		}
 
-		$post_type = get_post_type_object( $this->post_type );
-		if ( ! current_user_can( $post_type->cap->create_posts ) ) {
+		$post_type = get_post_type_object($this->post_type);
+		if (!current_user_can($post_type->cap->create_posts)) {
 			return new WP_Error( 
                 'rest_cannot_create', 
-                __( 'Sorry, you are not allowed to create discounts as this user.', 'invoicing' ), 
+                __('Sorry, you are not allowed to create discounts as this user.', 'invoicing'), 
                 array( 
                     'status' => rest_authorization_required_code(),
                 )
@@ -301,32 +301,32 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
-	public function create_item( $request ) {
+	public function create_item($request) {
 
-		if ( ! empty( $request['id'] ) ) {
-			return new WP_Error( 'rest_item_exists', __( 'Cannot create existing discount.', 'invoicing' ), array( 'status' => 400 ) );
+		if (!empty($request['id'])) {
+			return new WP_Error('rest_item_exists', __('Cannot create existing discount.', 'invoicing'), array('status' => 400));
 		}
 
-		$request->set_param( 'context', 'edit' );
+		$request->set_param('context', 'edit');
 
 		// Prepare the updated data.
-		$discount_data = $this->prepare_item_for_database( $request );
+		$discount_data = $this->prepare_item_for_database($request);
 
-		if ( is_wp_error( $discount_data ) ) {
+		if (is_wp_error($discount_data)) {
 			return $discount_data;
 		}
 
 		$discount_data['post_type'] = $this->post_type;
 
 		// Try creating the discount.
-        $discount = wp_insert_post( $discount_data, true );
+        $discount = wp_insert_post($discount_data, true);
 
-		if ( is_wp_error( $discount ) ) {
+		if (is_wp_error($discount)) {
             return $discount;
 		}
 
 		// Prepare the response
-		$response = $this->prepare_item_for_response( $discount, $request );
+		$response = $this->prepare_item_for_response($discount, $request);
 
 		/**
 		 * Fires after a single discount is created or updated via the REST API.
@@ -337,7 +337,7 @@ 
 		 * @param WP_REST_Request $request  Request object.
 		 * @param bool            $creating True when creating a post, false when updating.
 		 */
-		do_action( "wpinv_rest_insert_discount", $discount, $request, true );
+		do_action("wpinv_rest_insert_discount", $discount, $request, true);
 
 		/**
 		 * Filters the responses for creating single item requests.
@@ -349,9 +349,9 @@ 
 		 * @param array           $response Invoice properties.
 		 * @param WP_REST_Request $request The request used.
 		 */
-        $response       = apply_filters( "wpinv_rest_create_discount_response", $response, $request );
+        $response = apply_filters("wpinv_rest_create_discount_response", $response, $request);
 
-        return rest_ensure_response( $response );
+        return rest_ensure_response($response);
 	}
 
 	/**
@@ -362,21 +362,21 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return true|WP_Error True if the request has access to update the item, WP_Error object otherwise.
 	 */
-	public function update_item_permissions_check( $request ) {
+	public function update_item_permissions_check($request) {
 
 		// Retrieve the item.
-		$item = $this->get_post( $request['id'] );
-		if ( is_wp_error( $item ) ) {
+		$item = $this->get_post($request['id']);
+		if (is_wp_error($item)) {
 			return $item;
 		}
 
-		if ( wpinv_current_user_can_manage_invoicing() ) {
+		if (wpinv_current_user_can_manage_invoicing()) {
 			return true;
 		}
 
 		return new WP_Error( 
 			'rest_cannot_edit', 
-			__( 'Sorry, you are not allowed to update this discount.', 'invoicing' ), 
+			__('Sorry, you are not allowed to update this discount.', 'invoicing'), 
 			array( 
 				'status' => rest_authorization_required_code(),
 			)
@@ -392,62 +392,62 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
-	public function update_item( $request ) {
+	public function update_item($request) {
 		
 		// Ensure the item exists.
-        $valid_check = $this->get_post( $request['id'] );
+        $valid_check = $this->get_post($request['id']);
         
         // Abort early if it does not exist
-		if ( is_wp_error( $valid_check ) ) {
+		if (is_wp_error($valid_check)) {
 			return $valid_check;
 		}
 
-		$request->set_param( 'context', 'edit' );
+		$request->set_param('context', 'edit');
 
 		// Prepare the updated data.
-		$data_to_update = $this->prepare_item_for_database( $request );
+		$data_to_update = $this->prepare_item_for_database($request);
 
-		if ( is_wp_error( $data_to_update ) ) {
+		if (is_wp_error($data_to_update)) {
 			return $data_to_update;
 		}
 
-		if( empty( $data_to_update['meta_input'] ) ) {
-			unset( $data_to_update['meta_input'] );
+		if (empty($data_to_update['meta_input'])) {
+			unset($data_to_update['meta_input']);
 		}
 
 		// Abort if no item data is provided
-        if( empty( $data_to_update ) ) {
-            return new WP_Error( 'missing_data', __( 'An update request cannot be empty.', 'invoicing' ) );
+        if (empty($data_to_update)) {
+            return new WP_Error('missing_data', __('An update request cannot be empty.', 'invoicing'));
 		}
 		
 		// post_status
-		if( ! empty( $data_to_update['post_status'] ) ) {
-			wpinv_update_discount_status( $request['id'], $data_to_update['post_status'] );
-			unset( $data_to_update['post_status'] );
+		if (!empty($data_to_update['post_status'])) {
+			wpinv_update_discount_status($request['id'], $data_to_update['post_status']);
+			unset($data_to_update['post_status']);
 		}
 
 		// Update the item
-		if( ! empty( $data_to_update ) ) {
+		if (!empty($data_to_update)) {
 
 			// Include the item ID
 			$data_to_update['ID'] = $request['id'];
 
-			$updated = wp_update_post( $data_to_update, true );
+			$updated = wp_update_post($data_to_update, true);
 
 			// Incase the update operation failed...
-			if ( is_wp_error( $updated ) ) {
+			if (is_wp_error($updated)) {
 				return $updated;
 			}
 
 		}
 
-		$updated_discount = get_post( $request['id'] );
+		$updated_discount = get_post($request['id']);
 
 		// Prepare the response
-		$response = $this->prepare_item_for_response( $updated_discount, $request );
+		$response = $this->prepare_item_for_response($updated_discount, $request);
 
 		/** This action is documented in includes/class-wpinv-rest-item-controller.php */
-		do_action( "wpinv_rest_insert_discount", $updated_discount, $request, false );
+		do_action("wpinv_rest_insert_discount", $updated_discount, $request, false);
 
 		/**
 		 * Filters the responses for updating single discount requests.
@@ -459,9 +459,9 @@ 
 		 * @param array           $data_to_update Discount properties.
 		 * @param WP_REST_Request $request The request used.
 		 */
-        $response       = apply_filters( "wpinv_rest_update_discount_response", $response,  $data_to_update, $request );
+        $response = apply_filters("wpinv_rest_update_discount_response", $response, $data_to_update, $request);
 
-        return rest_ensure_response( $response );
+        return rest_ensure_response($response);
 	}
 
 	/**
@@ -472,19 +472,19 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return true|WP_Error True if the request has access to delete the discount, WP_Error object otherwise.
 	 */
-	public function delete_item_permissions_check( $request ) {
+	public function delete_item_permissions_check($request) {
 
 		// Retrieve the discount.
-		$discount = $this->get_post( $request['id'] );
-		if ( is_wp_error( $discount ) ) {
+		$discount = $this->get_post($request['id']);
+		if (is_wp_error($discount)) {
 			return $discount;
 		} 
 
 		// Ensure the current user can delete the discount
-		if (! wpinv_current_user_can_manage_invoicing() ) {
+		if (!wpinv_current_user_can_manage_invoicing()) {
 			return new WP_Error( 
                 'rest_cannot_delete', 
-                __( 'Sorry, you are not allowed to delete this discount.', 'invoicing' ), 
+                __('Sorry, you are not allowed to delete this discount.', 'invoicing'), 
                 array( 
                     'status' => rest_authorization_required_code(),
                 )
@@ -502,24 +502,24 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
-	public function delete_item( $request ) {
+	public function delete_item($request) {
 		
 		// Retrieve the discount.
-		$discount = $this->get_post( $request['id'] );
-		if ( is_wp_error( $discount ) ) {
+		$discount = $this->get_post($request['id']);
+		if (is_wp_error($discount)) {
 			return $discount;
 		}
 
-		$request->set_param( 'context', 'edit' );
+		$request->set_param('context', 'edit');
 
 		// Prepare the discount id
-		$id    = $discount->ID;
+		$id = $discount->ID;
 
 		// Prepare the response
-		$response = $this->prepare_item_for_response( $discount, $request );
+		$response = $this->prepare_item_for_response($discount, $request);
 
 		// Delete the discount...
-		wpinv_remove_discount( $id );
+		wpinv_remove_discount($id);
 
 		/**
 		 * Fires immediately after a single discount is deleted via the REST API.
@@ -530,7 +530,7 @@ 
 		 * @param WP_POST    $discount  The deleted discount.
 		 * @param WP_REST_Request  $request  The request sent to the API.
 		 */
-		do_action( "wpinv_rest_delete_discount", $discount, $request );
+		do_action("wpinv_rest_delete_discount", $discount, $request);
 
 		return $response;
 
@@ -546,44 +546,44 @@ 
 	 */
 	public function get_collection_params() {
         
-        $query_params               = array(
+        $query_params = array(
 
             // Discount status.
             'status'                => array(
                 'default'           => 'publish',
-                'description'       => __( 'Limit result set to discounts assigned one or more statuses.', 'invoicing' ),
+                'description'       => __('Limit result set to discounts assigned one or more statuses.', 'invoicing'),
                 'type'              => 'array',
-                'sanitize_callback' => array( $this, 'sanitize_post_statuses' ),
+                'sanitize_callback' => array($this, 'sanitize_post_statuses'),
             ),
             
             // Discount types
             'type'                  => array(
-				'description'       => __( 'Type of discounts to fetch.', 'invoicing' ),
+				'description'       => __('Type of discounts to fetch.', 'invoicing'),
 				'type'              => 'array',
-				'default'           => array_keys( wpinv_get_discount_types() ),
+				'default'           => array_keys(wpinv_get_discount_types()),
 				'items'             => array(
-                    'enum'          => array_keys( wpinv_get_discount_types() ),
+                    'enum'          => array_keys(wpinv_get_discount_types()),
                     'type'          => 'string',
                 ),
 			),
 			
 			// Number of results per page
             'limit'                 => array(
-				'description'       => __( 'Number of discounts to fetch.', 'invoicing' ),
+				'description'       => __('Number of discounts to fetch.', 'invoicing'),
 				'type'              => 'integer',
-				'default'           => (int) get_option( 'posts_per_page' ),
+				'default'           => (int) get_option('posts_per_page'),
             ),
 
             // Pagination
             'page'     => array(
-				'description'       => __( 'Current page to fetch.', 'invoicing' ),
+				'description'       => __('Current page to fetch.', 'invoicing'),
 				'type'              => 'integer',
 				'default'           => 1,
             ),
 
             // Exclude certain items
             'exclude'  => array(
-                'description' => __( 'Ensure result set excludes specific IDs.', 'invoicing' ),
+                'description' => __('Ensure result set excludes specific IDs.', 'invoicing'),
                 'type'        => 'array',
                 'items'       => array(
                     'type' => 'integer',
@@ -593,7 +593,7 @@ 
 
             // Order discounts by
             'orderby'  => array(
-                'description' => __( 'Sort discounts by object attribute.', 'invoicing' ),
+                'description' => __('Sort discounts by object attribute.', 'invoicing'),
                 'type'        => 'string',
                 'default'     => 'date',
                 'enum'        => array(
@@ -609,15 +609,15 @@ 
 
             // How to order
             'order'    => array(
-                'description' => __( 'Order sort attribute ascending or descending.', 'invoicing' ),
+                'description' => __('Order sort attribute ascending or descending.', 'invoicing'),
                 'type'        => 'string',
                 'default'     => 'DESC',
-                'enum'        => array( 'ASC', 'DESC' ),
+                'enum'        => array('ASC', 'DESC'),
 			),
 			
 			// Search term
             'search'                => array(
-				'description'       => __( 'Return discounts that match the search term.', 'invoicing' ),
+				'description'       => __('Return discounts that match the search term.', 'invoicing'),
 				'type'              => 'string',
             ),
         );
@@ -630,7 +630,7 @@ 
 		 *
 		 * @param array        $query_params JSON Schema-formatted collection parameters.
 		 */
-		return apply_filters( "wpinv_rest_discounts_collection_params", $query_params );
+		return apply_filters("wpinv_rest_discounts_collection_params", $query_params);
     }
     
     /**
@@ -641,7 +641,7 @@ 
 	 * @param object|string $post_type Post type name or object.
 	 * @return bool Whether the post type is allowed in REST.
 	 */
-	protected function check_is_post_type_allowed( $post_type ) {
+	protected function check_is_post_type_allowed($post_type) {
 		return true;
 	}
 
@@ -653,93 +653,93 @@ 
 	 * @param WP_REST_Request $request Request object.
 	 * @return array|WP_Error Discount Properties or WP_Error.
 	 */
-	protected function prepare_item_for_database( $request ) {
-		$prepared_item 		 = new stdClass();
+	protected function prepare_item_for_database($request) {
+		$prepared_item = new stdClass();
 		$prepared_item->meta_input = array();
 
 		// Post ID.
-		if ( isset( $request['id'] ) ) {
-			$existing_item = $this->get_post( $request['id'] );
-			if ( is_wp_error( $existing_item ) ) {
+		if (isset($request['id'])) {
+			$existing_item = $this->get_post($request['id']);
+			if (is_wp_error($existing_item)) {
 				return $existing_item;
 			}
 
-			$prepared_item->ID 		  = $existing_item->ID;
+			$prepared_item->ID = $existing_item->ID;
 		}
 
 		$schema = $this->get_item_schema();
 
 		// item title.
-		if ( ! empty( $schema['properties']['title'] ) && isset( $request['title'] ) ) {
-			$prepared_item->post_title = sanitize_text_field( $request['title'] );
+		if (!empty($schema['properties']['title']) && isset($request['title'])) {
+			$prepared_item->post_title = sanitize_text_field($request['title']);
 		}
 
 		// item status.
-		if ( ! empty( $schema['properties']['status'] ) && isset( $request['status'] ) && in_array( $request['status'], array_keys( get_post_stati( array( 'internal' => false ) ) ) ) ) {
-			$prepared_item->post_status = sanitize_text_field( $request['status'] );
+		if (!empty($schema['properties']['status']) && isset($request['status']) && in_array($request['status'], array_keys(get_post_stati(array('internal' => false))))) {
+			$prepared_item->post_status = sanitize_text_field($request['status']);
 		}
 
 		// Code.
-		if ( ! empty( $schema['properties']['code'] ) && isset( $request['code'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_code'] = trim( $request['code'] );
+		if (!empty($schema['properties']['code']) && isset($request['code'])) {
+			$prepared_item->meta_input['_wpi_discount_code'] = trim($request['code']);
 		}
 
 		// Type.
-		if ( ! empty( $schema['properties']['type'] ) && isset( $request['type'] )  && in_array( $request['type'], array_keys( wpinv_get_discount_types() ) ) ) {
-			$prepared_item->meta_input['_wpi_discount_type'] = trim( $request['type'] );
+		if (!empty($schema['properties']['type']) && isset($request['type']) && in_array($request['type'], array_keys(wpinv_get_discount_types()))) {
+			$prepared_item->meta_input['_wpi_discount_type'] = trim($request['type']);
 		}
 
 		// Amount.
-		if ( ! empty( $schema['properties']['amount'] ) && isset( $request['amount'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_amount'] = floatval( $request['amount'] );
+		if (!empty($schema['properties']['amount']) && isset($request['amount'])) {
+			$prepared_item->meta_input['_wpi_discount_amount'] = floatval($request['amount']);
 		}
 
 		// Items.
-		if ( ! empty( $schema['properties']['items'] ) && isset( $request['items'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_items'] = wpinv_parse_list( $request['items'] );
+		if (!empty($schema['properties']['items']) && isset($request['items'])) {
+			$prepared_item->meta_input['_wpi_discount_items'] = wpinv_parse_list($request['items']);
 		}
 
 		// Excluded Items.
-		if ( ! empty( $schema['properties']['exclude_items'] ) && isset( $request['exclude_items'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_excluded_items'] = wpinv_parse_list( $request['exclude_items'] );
+		if (!empty($schema['properties']['exclude_items']) && isset($request['exclude_items'])) {
+			$prepared_item->meta_input['_wpi_discount_excluded_items'] = wpinv_parse_list($request['exclude_items']);
 		}
 
 		// Start date.
-		if ( ! empty( $schema['properties']['start_date'] ) && isset( $request['start_date'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_start'] = trim( $request['start_date'] );
+		if (!empty($schema['properties']['start_date']) && isset($request['start_date'])) {
+			$prepared_item->meta_input['_wpi_discount_start'] = trim($request['start_date']);
 		}
 
 		// End date.
-		if ( ! empty( $schema['properties']['end_date'] ) && isset( $request['end_date'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_expiration'] = trim( $request['end_date'] );
+		if (!empty($schema['properties']['end_date']) && isset($request['end_date'])) {
+			$prepared_item->meta_input['_wpi_discount_expiration'] = trim($request['end_date']);
 		}
 
 		// Minimum amount.
-		if ( ! empty( $schema['properties']['minimum_amount'] ) && isset( $request['minimum_amount'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_min_total'] = floatval( $request['minimum_amount'] );
+		if (!empty($schema['properties']['minimum_amount']) && isset($request['minimum_amount'])) {
+			$prepared_item->meta_input['_wpi_discount_min_total'] = floatval($request['minimum_amount']);
 		}
 
 		// Maximum amount.
-		if ( ! empty( $schema['properties']['maximum_amount'] ) && isset( $request['maximum_amount'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_max_total'] = floatval( $request['maximum_amount'] );
+		if (!empty($schema['properties']['maximum_amount']) && isset($request['maximum_amount'])) {
+			$prepared_item->meta_input['_wpi_discount_max_total'] = floatval($request['maximum_amount']);
 		}
 
 		// Recurring.
-		if ( ! empty( $schema['properties']['recurring'] ) && isset( $request['recurring'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_is_recurring'] = empty( (int) $request['recurring'] ) ? 0 : 1;
+		if (!empty($schema['properties']['recurring']) && isset($request['recurring'])) {
+			$prepared_item->meta_input['_wpi_discount_is_recurring'] = empty((int) $request['recurring']) ? 0 : 1;
 		}
 
 		// Maximum uses.
-		if ( ! empty( $schema['properties']['max_uses'] ) && isset( $request['max_uses'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_max_uses'] = intval( $request['max_uses'] );
+		if (!empty($schema['properties']['max_uses']) && isset($request['max_uses'])) {
+			$prepared_item->meta_input['_wpi_discount_max_uses'] = intval($request['max_uses']);
 		}
 
 		// Single use.
-		if ( ! empty( $schema['properties']['single_use'] ) && isset( $request['single_use'] ) ) {
-			$prepared_item->meta_input['_wpi_discount_is_single_use'] = empty( (int) $request['single_use'] ) ? 0 : 1;
+		if (!empty($schema['properties']['single_use']) && isset($request['single_use'])) {
+			$prepared_item->meta_input['_wpi_discount_is_single_use'] = empty((int) $request['single_use']) ? 0 : 1;
 		}
 
-		$discount_data = (array) wp_unslash( $prepared_item );
+		$discount_data = (array) wp_unslash($prepared_item);
 
 		/**
 		 * Filters an item before it is inserted via the REST API.
@@ -749,7 +749,7 @@ 
 		 * @param array        $discount_data An array of discount data
 		 * @param WP_REST_Request $request       Request object.
 		 */
-		return apply_filters( "wpinv_rest_pre_insert_discount", $discount_data, $request );
+		return apply_filters("wpinv_rest_pre_insert_discount", $discount_data, $request);
 
 	}
 
@@ -762,110 +762,110 @@ 
 	 * @param WP_REST_Request $request Request object.
 	 * @return WP_REST_Response Response object.
 	 */
-	public function prepare_item_for_response( $discount, $request ) {
+	public function prepare_item_for_response($discount, $request) {
 
-		$GLOBALS['post'] = get_post( $discount->ID );
+		$GLOBALS['post'] = get_post($discount->ID);
 
-		setup_postdata( $discount->ID );
+		setup_postdata($discount->ID);
 
 		// Fetch the fields to include in this response.
-		$fields = $this->get_fields_for_response( $request );
+		$fields = $this->get_fields_for_response($request);
 
 		// Base fields for every discount.
 		$data = array();
 
 		// Set up ID.
-		if ( rest_is_field_included( 'id', $fields ) ) {
+		if (rest_is_field_included('id', $fields)) {
 			$data['id'] = $discount->ID;
 		}
 
 		// Title.
-		if ( rest_is_field_included( 'title', $fields ) ) {
-			$data['title'] = get_the_title( $discount->ID );
+		if (rest_is_field_included('title', $fields)) {
+			$data['title'] = get_the_title($discount->ID);
 		}
 
 		// Code.
-		if ( rest_is_field_included( 'code', $fields ) ) {
-			$data['code'] = wpinv_get_discount_code( $discount->ID );
+		if (rest_is_field_included('code', $fields)) {
+			$data['code'] = wpinv_get_discount_code($discount->ID);
 		}
 
 		// Type.
-		if ( rest_is_field_included( 'type', $fields ) ) {
-			$data['type'] = wpinv_get_discount_type( $discount->ID );
+		if (rest_is_field_included('type', $fields)) {
+			$data['type'] = wpinv_get_discount_type($discount->ID);
 		}
 
 		// Amount.
-		if ( rest_is_field_included( 'amount', $fields ) ) {
-			$data['amount'] = wpinv_get_discount_amount( $discount->ID );
+		if (rest_is_field_included('amount', $fields)) {
+			$data['amount'] = wpinv_get_discount_amount($discount->ID);
 		}
 
 		// Status.
-		if ( rest_is_field_included( 'status', $fields ) ) {
-			$data['status'] = get_post_status( $discount->ID );
+		if (rest_is_field_included('status', $fields)) {
+			$data['status'] = get_post_status($discount->ID);
 		}
 
 		// Items.
-		if ( rest_is_field_included( 'items', $fields ) ) {
-			$data['items'] = wpinv_get_discount_item_reqs( $discount->ID );
+		if (rest_is_field_included('items', $fields)) {
+			$data['items'] = wpinv_get_discount_item_reqs($discount->ID);
 		}
 
 		// Excluded Items.
-		if ( rest_is_field_included( 'exclude_items', $fields ) ) {
-			$data['exclude_items'] = wpinv_get_discount_excluded_items( $discount->ID );
+		if (rest_is_field_included('exclude_items', $fields)) {
+			$data['exclude_items'] = wpinv_get_discount_excluded_items($discount->ID);
 		}
 
 		// Start date.
-		if ( rest_is_field_included( 'start_date', $fields ) ) {
-			$data['start_date'] = wpinv_get_discount_start_date( $discount->ID );
+		if (rest_is_field_included('start_date', $fields)) {
+			$data['start_date'] = wpinv_get_discount_start_date($discount->ID);
 		}
 
 		// End date.
-		if ( rest_is_field_included( 'end_date', $fields ) ) {
-			$data['end_date'] = wpinv_get_discount_expiration( $discount->ID );
+		if (rest_is_field_included('end_date', $fields)) {
+			$data['end_date'] = wpinv_get_discount_expiration($discount->ID);
 		}
 
 		// Minimum amount.
-		if ( rest_is_field_included( 'minimum_amount', $fields ) ) {
-			$data['minimum_amount'] = wpinv_get_discount_min_total( $discount->ID );
+		if (rest_is_field_included('minimum_amount', $fields)) {
+			$data['minimum_amount'] = wpinv_get_discount_min_total($discount->ID);
 		}
 
 		// Maximum amount.
-		if ( rest_is_field_included( 'maximum_amount', $fields ) ) {
-			$data['maximum_amount'] = wpinv_get_discount_max_total( $discount->ID );
+		if (rest_is_field_included('maximum_amount', $fields)) {
+			$data['maximum_amount'] = wpinv_get_discount_max_total($discount->ID);
 		}
 
 		// Recurring.
-		if ( rest_is_field_included( 'recurring', $fields ) ) {
-			$data['recurring'] = wpinv_discount_is_recurring( $discount->ID );
+		if (rest_is_field_included('recurring', $fields)) {
+			$data['recurring'] = wpinv_discount_is_recurring($discount->ID);
 		}
 
 		// Maximum uses.
-		if ( rest_is_field_included( 'max_uses', $fields ) ) {
-			$data['max_uses'] = wpinv_get_discount_max_uses( $discount->ID );
+		if (rest_is_field_included('max_uses', $fields)) {
+			$data['max_uses'] = wpinv_get_discount_max_uses($discount->ID);
 		}
 
 		// Single use.
-		if ( rest_is_field_included( 'single_use', $fields ) ) {
-			$data['single_use'] = wpinv_discount_is_single_use( $discount->ID );
+		if (rest_is_field_included('single_use', $fields)) {
+			$data['single_use'] = wpinv_discount_is_single_use($discount->ID);
 		}
 
-		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
-		$data    = $this->add_additional_fields_to_object( $data, $request );
-		$data    = $this->filter_response_by_context( $data, $context );
+		$context = !empty($request['context']) ? $request['context'] : 'view';
+		$data    = $this->add_additional_fields_to_object($data, $request);
+		$data    = $this->filter_response_by_context($data, $context);
 
 		// Wrap the data in a response object.
-		$response = rest_ensure_response( $data );
+		$response = rest_ensure_response($data);
 
-		$links = $this->prepare_links( $discount );
-		$response->add_links( $links );
+		$links = $this->prepare_links($discount);
+		$response->add_links($links);
 
-		if ( ! empty( $links['self']['href'] ) ) {
-			$actions = $this->get_available_actions( $discount, $request );
+		if (!empty($links['self']['href'])) {
+			$actions = $this->get_available_actions($discount, $request);
 
 			$self = $links['self']['href'];
 
-			foreach ( $actions as $rel ) {
-				$response->add_link( $rel, $self );
+			foreach ($actions as $rel) {
+				$response->add_link($rel, $self);
 			}
 		}
 
@@ -878,7 +878,7 @@ 
 		 * @param WP_Post    $discount  The discount post object.
 		 * @param WP_REST_Request  $request  Request object.
 		 */
-		return apply_filters( "wpinv_rest_prepare_discount", $response, $discount, $request );
+		return apply_filters("wpinv_rest_prepare_discount", $response, $discount, $request);
 	}
 
 	/**
@@ -891,57 +891,57 @@ 
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return array Fields to be included in the response.
 	 */
-	public function get_fields_for_response( $request ) {
+	public function get_fields_for_response($request) {
 		$schema     = $this->get_item_schema();
-		$properties = isset( $schema['properties'] ) ? $schema['properties'] : array();
+		$properties = isset($schema['properties']) ? $schema['properties'] : array();
 
 		$additional_fields = $this->get_additional_fields();
-		foreach ( $additional_fields as $field_name => $field_options ) {
+		foreach ($additional_fields as $field_name => $field_options) {
 			// For back-compat, include any field with an empty schema
 			// because it won't be present in $this->get_item_schema().
-			if ( is_null( $field_options['schema'] ) ) {
-				$properties[ $field_name ] = $field_options;
+			if (is_null($field_options['schema'])) {
+				$properties[$field_name] = $field_options;
 			}
 		}
 
 		// Exclude fields that specify a different context than the request context.
 		$context = $request['context'];
-		if ( $context ) {
-			foreach ( $properties as $name => $options ) {
-				if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) {
-					unset( $properties[ $name ] );
+		if ($context) {
+			foreach ($properties as $name => $options) {
+				if (!empty($options['context']) && !in_array($context, $options['context'], true)) {
+					unset($properties[$name]);
 				}
 			}
 		}
 
-		$fields = array_keys( $properties );
+		$fields = array_keys($properties);
 
-		if ( ! isset( $request['_fields'] ) ) {
+		if (!isset($request['_fields'])) {
 			return $fields;
 		}
-		$requested_fields = wpinv_parse_list( $request['_fields'] );
-		if ( 0 === count( $requested_fields ) ) {
+		$requested_fields = wpinv_parse_list($request['_fields']);
+		if (0 === count($requested_fields)) {
 			return $fields;
 		}
 		// Trim off outside whitespace from the comma delimited list.
-		$requested_fields = array_map( 'trim', $requested_fields );
+		$requested_fields = array_map('trim', $requested_fields);
 		// Always persist 'id', because it can be needed for add_additional_fields_to_object().
-		if ( in_array( 'id', $fields, true ) ) {
+		if (in_array('id', $fields, true)) {
 			$requested_fields[] = 'id';
 		}
 		// Return the list of all requested fields which appear in the schema.
 		return array_reduce(
 			$requested_fields,
-			function( $response_fields, $field ) use ( $fields ) {
-				if ( in_array( $field, $fields, true ) ) {
+			function($response_fields, $field) use ($fields) {
+				if (in_array($field, $fields, true)) {
 					$response_fields[] = $field;
 					return $response_fields;
 				}
 				// Check for nested fields if $field is not a direct match.
-				$nested_fields = explode( '.', $field );
+				$nested_fields = explode('.', $field);
 				// A nested field is included so long as its top-level property is
 				// present in the schema.
-				if ( in_array( $nested_fields[0], $fields, true ) ) {
+				if (in_array($nested_fields[0], $fields, true)) {
 					$response_fields[] = $field;
 				}
 				return $response_fields;
@@ -960,8 +960,8 @@ 
 	public function get_item_schema() {
 
 		// Maybe retrieve the schema from cache.
-		if ( $this->schema ) {
-			return $this->add_additional_fields_schema( $this->schema );
+		if ($this->schema) {
+			return $this->add_additional_fields_schema($this->schema);
 		}
 
 		$schema = array(
@@ -973,99 +973,99 @@ 
 			'properties' 		  => array(
 
 				'id'           => array(
-					'description' => __( 'Unique identifier for the discount.', 'invoicing' ),
+					'description' => __('Unique identifier for the discount.', 'invoicing'),
 					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 					'readonly'    => true,
 				),
 
 				'title'			  => array(
-					'description' => __( 'The title for the discount.', 'invoicing' ),
+					'description' => __('The title for the discount.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit' ),
+					'context'     => array('view', 'edit'),
 				),
 
 				'code'        => array(
-					'description' => __( 'The discount code.', 'invoicing' ),
+					'description' => __('The discount code.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 					'required'	  => true,
 				),
 
 				'type'        => array(
-					'description' => __( 'The type of discount.', 'invoicing' ),
+					'description' => __('The type of discount.', 'invoicing'),
 					'type'        => 'string',
-					'enum'        => array_keys( wpinv_get_discount_types() ),
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'enum'        => array_keys(wpinv_get_discount_types()),
+					'context'     => array('view', 'edit', 'embed'),
 					'default'	  => 'percentage',
 				),
 
 				'amount'        => array(
-					'description' => __( 'The discount value.', 'invoicing' ),
+					'description' => __('The discount value.', 'invoicing'),
 					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 					'required'	  => true,
 				),
 
 				'status'       => array(
-					'description' => __( 'A named status for the discount.', 'invoicing' ),
+					'description' => __('A named status for the discount.', 'invoicing'),
 					'type'        => 'string',
-					'enum'        => array_keys( get_post_stati( array( 'internal' => false ) ) ),
-					'context'     => array( 'view', 'edit' ),
+					'enum'        => array_keys(get_post_stati(array('internal' => false))),
+					'context'     => array('view', 'edit'),
 				),
 
 				'items'       => array(
-					'description' => __( 'Items which need to be in the cart to use this discount or, for "Item Discounts", which items are discounted. If left blank, this discount will be used on any item.', 'invoicing' ),
+					'description' => __('Items which need to be in the cart to use this discount or, for "Item Discounts", which items are discounted. If left blank, this discount will be used on any item.', 'invoicing'),
 					'type'        => 'array',
-					'context'     => array( 'view', 'edit' ),
+					'context'     => array('view', 'edit'),
 				),
 
 				'exclude_items'   => array(
-					'description' => __( 'Items which are NOT allowed to use this discount.', 'invoicing' ),
+					'description' => __('Items which are NOT allowed to use this discount.', 'invoicing'),
 					'type'        => 'array',
-					'context'     => array( 'view', 'edit' ),
+					'context'     => array('view', 'edit'),
 				),
 
 				'start_date'       => array(
-					'description' => __( 'The start date for the discount in the format of yyyy-mm-dd hh:mm:ss  . If provided, the discount can only be used after or on this date.', 'invoicing' ),
+					'description' => __('The start date for the discount in the format of yyyy-mm-dd hh:mm:ss  . If provided, the discount can only be used after or on this date.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit' ),
+					'context'     => array('view', 'edit'),
 				),
 
 				'end_date'        => array(
-					'description' => __( 'The expiration date for the discount.', 'invoicing' ),
+					'description' => __('The expiration date for the discount.', 'invoicing'),
 					'type'        => 'string',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 				
 				'minimum_amount'       => array(
-					'description' => __( 'Minimum amount needed to use this invoice.', 'invoicing' ),
+					'description' => __('Minimum amount needed to use this invoice.', 'invoicing'),
 					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'maximum_amount'       => array(
-					'description' => __( 'Maximum amount needed to use this invoice.', 'invoicing' ),
+					'description' => __('Maximum amount needed to use this invoice.', 'invoicing'),
 					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'recurring'       => array(
-					'description' => __( 'Whether the discount is applied to all recurring payments or only the first recurring payment.', 'invoicing' ),
+					'description' => __('Whether the discount is applied to all recurring payments or only the first recurring payment.', 'invoicing'),
 					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'max_uses'        => array(
-					'description' => __( 'The maximum number of times this discount code can be used.', 'invoicing' ),
+					'description' => __('The maximum number of times this discount code can be used.', 'invoicing'),
 					'type'        => 'number',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				),
 
 				'single_use'       => array(
-					'description' => __( 'Whether or not this discount can only be used once per user.', 'invoicing' ),
+					'description' => __('Whether or not this discount can only be used once per user.', 'invoicing'),
 					'type'        => 'integer',
-					'context'     => array( 'view', 'edit', 'embed' ),
+					'context'     => array('view', 'edit', 'embed'),
 				)
 
 			),
@@ -1083,12 +1083,12 @@ 
 		 *
 		 * @param array   $schema    The discount schema.
 		 */
-        $schema = apply_filters( "wpinv_rest_discount_schema", $schema );
+        $schema = apply_filters("wpinv_rest_discount_schema", $schema);
 
 		//  Cache the discount schema.
 		$this->schema = $schema;
 		
-		return $this->add_additional_fields_schema( $this->schema );
+		return $this->add_additional_fields_schema($this->schema);
 	}
 
 	/**
@@ -1100,20 +1100,20 @@ 
 	 */
 	protected function get_schema_links() {
 
-		$href = rest_url( "{$this->namespace}/{$this->rest_base}/{id}" );
+		$href = rest_url("{$this->namespace}/{$this->rest_base}/{id}");
 
 		$links = array();
 
 		$links[] = array(
 			'rel'          => 'https://api.w.org/action-publish',
-			'title'        => __( 'The current user can publish this discount.' ),
+			'title'        => __('The current user can publish this discount.'),
 			'href'         => $href,
 			'targetSchema' => array(
 				'type'       => 'object',
 				'properties' => array(
 					'status' => array(
 						'type' => 'string',
-						'enum' => array( 'publish', 'future' ),
+						'enum' => array('publish', 'future'),
 					),
 				),
 			),
@@ -1130,18 +1130,18 @@ 
 	 * @param WP_Post $discount Post Object.
 	 * @return array Links for the given discount.
 	 */
-	protected function prepare_links( $discount ) {
+	protected function prepare_links($discount) {
 
 		// Prepare the base REST API endpoint for discounts.
-		$base = sprintf( '%s/%s', $this->namespace, $this->rest_base );
+		$base = sprintf('%s/%s', $this->namespace, $this->rest_base);
 
 		// Entity meta.
 		$links = array(
 			'self'       => array(
-				'href' => rest_url( trailingslashit( $base ) . $discount->ID ),
+				'href' => rest_url(trailingslashit($base) . $discount->ID),
 			),
 			'collection' => array(
-				'href' => rest_url( $base ),
+				'href' => rest_url($base),
 			),
 		);
 
@@ -1154,7 +1154,7 @@ 
 		 *
 		 * @param array   $links    Rest links.
 		 */
-		return apply_filters( "wpinv_rest_discount_links", $links );
+		return apply_filters("wpinv_rest_discount_links", $links);
 
 	}
 
@@ -1167,19 +1167,19 @@ 
 	 * @param WP_REST_Request $request Request object.
 	 * @return array List of link relations.
 	 */
-	protected function get_available_actions( $discount, $request ) {
+	protected function get_available_actions($discount, $request) {
 
-		if ( 'edit' !== $request['context'] ) {
+		if ('edit' !== $request['context']) {
 			return array();
 		}
 
 		$rels = array();
 
 		// Retrieve the post type object.
-		$post_type = get_post_type_object( $discount->post_type );
+		$post_type = get_post_type_object($discount->post_type);
 
 		// Mark discount as published.
-		if ( current_user_can( $post_type->cap->publish_posts ) ) {
+		if (current_user_can($post_type->cap->publish_posts)) {
 			$rels[] = 'https://api.w.org/action-publish';
 		}
 
@@ -1192,7 +1192,7 @@ 
 		 *
 		 * @param array   $rels    Available link relations.
 		 */
-		return apply_filters( "wpinv_rest_discount_link_relations", $rels );
+		return apply_filters("wpinv_rest_discount_link_relations", $rels);
 	}
 
 	/**
@@ -1204,7 +1204,7 @@ 
 	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
 	 */
 	public function get_discount_types() {
-		return rest_ensure_response( wpinv_get_discount_types() );
+		return rest_ensure_response(wpinv_get_discount_types());
 	}