seb86 / woocommerce-subscribe-to-all-the-things-signup-trial-add-on

wc-satt-stt.php

Indentation +454 added lines, -454 removed lines

@@ -20,462 +20,462 @@
 if ( ! defined('ABSPATH') ) exit; // Exit if accessed directly.
 
 if ( ! class_exists( 'WCSATT_STT' ) ) {
-	class WCSATT_STT {
-
-		/* Plugin version. */
-		const VERSION = '1.0.0';
-
-		/* Required WC version. */
-		const REQ_WC_VERSION = '2.3.0';
-
-		/* Required WCSATT version */
-		const REQ_WCSATT_VERSION = '1.1.0';
-
-		/* Text domain. */
-		const TEXT_DOMAIN = 'wc-satt-stt';
-
-		/**
-		 * @var WCSATT_STT - the single instance of the class.
-		 *
-		 * @since 1.0.0
-		 */
-		protected static $_instance = null;
-
-		/**
-		 * Main WCSATT_STT Instance.
-		 *
-		 * Ensures only one instance of WCSATT_STT is loaded or can be loaded.
-		 *
-		 * @static
-		 * @see WCSATT_STT()
-		 * @return WCSATT_STT - Main instance
-		 * @since 1.0.0
-		 */
-		public static function instance() {
-			if ( is_null( self::$_instance ) ) {
-				self::$_instance = new self();
-			}
-			return self::$_instance;
-		}
-
-		/**
-		 * Cloning is forbidden.
-		 *
-		 * @since 1.0.0
-		 */
-		public function __clone() {
-			_doing_it_wrong( __FUNCTION__, __( 'Foul!' ), '1.0.0' );
-		}
-
-		/**
-		 * Unserializing instances of this class is forbidden.
-		 *
-		 * @since 1.0.0
-		 */
-		public function __wakeup() {
-			_doing_it_wrong( __FUNCTION__, __( 'Foul!' ), '1.0.0' );
-		}
-
-		/**
-		 * Load the plugin.
-		 */
-		public function __construct() {
-			add_action( 'plugins_loaded', array( $this, 'load_plugin' ) );
-			add_action( 'init', array( $this, 'init_plugin' ) );
-			add_action( 'admin_init', array( $this, 'admin_wcsatt_stt_product_meta' ) );
-			add_filter( 'plugin_row_meta', array( $this, 'plugin_meta_links' ), 10, 4 );
-		}
-
-		public function plugin_path() {
-			return untrailingslashit( plugin_dir_path( __FILE__ ) );
-		} // END plugin_path()
-
-		/*
+    class WCSATT_STT {
+
+        /* Plugin version. */
+        const VERSION = '1.0.0';
+
+        /* Required WC version. */
+        const REQ_WC_VERSION = '2.3.0';
+
+        /* Required WCSATT version */
+        const REQ_WCSATT_VERSION = '1.1.0';
+
+        /* Text domain. */
+        const TEXT_DOMAIN = 'wc-satt-stt';
+
+        /**
+         * @var WCSATT_STT - the single instance of the class.
+         *
+         * @since 1.0.0
+         */
+        protected static $_instance = null;
+
+        /**
+         * Main WCSATT_STT Instance.
+         *
+         * Ensures only one instance of WCSATT_STT is loaded or can be loaded.
+         *
+         * @static
+         * @see WCSATT_STT()
+         * @return WCSATT_STT - Main instance
+         * @since 1.0.0
+         */
+        public static function instance() {
+            if ( is_null( self::$_instance ) ) {
+                self::$_instance = new self();
+            }
+            return self::$_instance;
+        }
+
+        /**
+         * Cloning is forbidden.
+         *
+         * @since 1.0.0
+         */
+        public function __clone() {
+            _doing_it_wrong( __FUNCTION__, __( 'Foul!' ), '1.0.0' );
+        }
+
+        /**
+         * Unserializing instances of this class is forbidden.
+         *
+         * @since 1.0.0
+         */
+        public function __wakeup() {
+            _doing_it_wrong( __FUNCTION__, __( 'Foul!' ), '1.0.0' );
+        }
+
+        /**
+         * Load the plugin.
+         */
+        public function __construct() {
+            add_action( 'plugins_loaded', array( $this, 'load_plugin' ) );
+            add_action( 'init', array( $this, 'init_plugin' ) );
+            add_action( 'admin_init', array( $this, 'admin_wcsatt_stt_product_meta' ) );
+            add_filter( 'plugin_row_meta', array( $this, 'plugin_meta_links' ), 10, 4 );
+        }
+
+        public function plugin_path() {
+            return untrailingslashit( plugin_dir_path( __FILE__ ) );
+        } // END plugin_path()
+
+        /*
 		 * Check requirements on activation.
 		 */
-		public function load_plugin() {
-			global $woocommerce;
-
-			// Check that the required WooCommerce is running.
-			if ( version_compare( $woocommerce->version, self::REQ_WC_VERSION, '<' ) ) {
-				add_action( 'admin_notices', array( $this, 'wcsatt_stt_wc_admin_notice' ) );
-				return false;
-			}
-
-			// Checks that WooCommerce Subscribe All the Things is running or is less than the required version.
-			if ( ! class_exists( 'WCS_ATT' ) || version_compare( WCS_ATT::VERSION, self::REQ_WCSATT_VERSION, '<' ) ) {
-				add_action( 'admin_notices', array( $this, 'wcsatt_stt_admin_notice' ) );
-				return false;
-			}
-		} // END load_plugin()
-
-		/**
-		 * Display a warning message if minimum version of WooCommerce check fails.
-		 *
-		 * @return void
-		 */
-		public function wcsatt_stt_wc_admin_notice() {
-			echo '<div class="error"><p>' . sprintf( __( '%1$s requires at least %2$s v%3$s in order to function. Please upgrade %2$s.', 'wc-satt-stt' ), 'Sign up and Trial Options Add-on for WCSATT', 'WooCommerce', self::REQ_WC_VERSION ) . '</p></div>';
-		} // END wcsatt_stt_wc_admin_notice()
-
-		/**
-		 * Display a warning message if minimum version of WooCommerce Subscribe All the Things check fails.
-		 *
-		 * @return void
-		 */
-		public function wcsatt_stt_admin_notice() {
-			echo '<div class="error"><p>' . sprintf( __( '%1$s requires at least %2$s v%3$s in order to function. Please upgrade %2$s.', 'wc-satt-stt' ), 'WooCommerce Subscribe All the Things - Sign up and Trial Add-on', 'WooCommerce Subscribe All the Things', self::REQ_WCSATT_VERSION ) . '</p></div>';
-		} // END wcsatt_stt_admin_notice()
-
-		/**
-		 * Initialize the plugin if ready.
-		 *
-		 * @return void
-		 */
-		public function init_plugin() {
-			// Load text domain.
-			load_plugin_textdomain( 'wc-satt-stt', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
-
-			// Adds the sign up fee and trial data to the price html on the 'wcsatt_overridden_subscription_prices_product' filter.
-			add_filter( 'wcsatt_overridden_subscription_prices_product', array( $this, 'add_sub_scheme_data_price_html' ), 10, 3 );
-
-			// Adds the extra subscription scheme data to the product object on the 'wcsatt_converted_product_for_scheme_option' filter.
-			add_filter( 'wcsatt_converted_product_for_scheme_option', array( $this, 'sub_product_scheme_option' ), 10, 2 );
-
-			// Filters the price string to include the sign up fee and/or trial to pass per scheme option on the 'wcsatt_single_product_subscription_scheme_price_html' filter.
-			add_filter( 'wcsatt_single_product_subscription_scheme_price_html', array( $this, 'get_price_string' ), 10, 2 );
-
-			// Filters the lowest price string to include the sign up fee on the 'wcsatt_get_single_product_lowest_price_string' filter.
-			add_filter( 'wcsatt_get_single_product_lowest_price_string', array( $this, 'get_lowest_price_string' ), 10, 2 );
-
-			// Filters the lowest price subscription scheme data on the 'wcsatt_get_lowest_price_sub_scheme_data' filter.
-			add_filter( 'wcsatt_get_lowest_price_sub_scheme_data', array( $this, 'get_lowest_price_sub_scheme_data' ), 10, 2 );
-
-			// Adds the sign-up and/or trial data to the subscription scheme prices on the 'wcsatt_subscription_scheme_prices' filter.
-			add_filter( 'wcsatt_subscription_scheme_prices', array( $this, 'add_subscription_scheme_prices' ), 10, 2 );
-
-			// Overrides the price of the subscription for sign up fee and/or trial on the 'wcsatt_cart_item' filter.
-			add_filter( 'wcsatt_cart_item', array( $this, 'update_cart_item_sub_data' ), 10, 1 );
-		} // END init_plugin()
-
-		/**
-		 * Register the product meta data fields.
-		 *
-		 * @return void
-		 */
-		public function admin_wcsatt_stt_product_meta() {
-			// Subscription scheme options displayed on the 'wcsatt_subscription_scheme_product_content' action.
-			add_action( 'wcsatt_subscription_scheme_product_content', array( $this, 'wcsatt_stt_fields' ), 15, 3 );
-
-			// Filter the subscription scheme data to process the sign up and trial options on the ''wcsatt_subscription_scheme_process_scheme_data' filter.
-			add_filter( 'wcsatt_subscription_scheme_process_scheme_data', array( $this, 'wcsatt_stt_process_scheme_data' ), 10, 2 );
-		} // END admin_wcsatt_stt_product_meta()
-
-		/**
-		 * Show row meta on the plugin screen.
-		 *
-		 * @param mixed $links Plugin Row Meta
-		 * @param mixed $file  Plugin Base file
-		 * @return array
-		 */
-		public function plugin_meta_links( $links, $file, $data, $status ) {
-			if ( $file == plugin_basename( __FILE__ ) ) {
-				$author1 = '<a href="' . $data[ 'AuthorURI' ] . '">' . $data[ 'Author' ] . '</a>';
-				$author2 = '<a href="http://www.subscriptiongroup.co.uk/">Subscription Group Limited</a>';
-				$links[ 1 ] = sprintf( __( 'By %s', self::TEXT_DOMAIN ), sprintf( __( '%s and %s', self::TEXT_DOMAIN ), $author1, $author2 ) );
-			}
-
-			return $links;
-		} // END plugin_meta_links()
-
-		/**
-		 * Adds the default values for subscriptions schemes content.
-		 *
-		 * @param  array $defaults
-		 * @return void
-		 */
-		public static function add_default_subscription_schemes_content( $defaults ) {
-			$new_defaults = array(
-				'subscription_sign_up_fee'  => '',
-				'subscription_trial_length' => '',
-				'subscription_trial_period' => ''
-			);
-
-			return array_merge( $new_defaults, $defaults );
-		} // END add_default_subscription_schemes_content()
-
-		/**
-		 * Adds the trial and sign up fields under the subscription section.
-		 *
-		 * @param  int   $index
-		 * @param  array $scheme_data
-		 * @param  int   $post_id
-		 * @return void
-		 */
-		public function wcsatt_stt_fields( $index, $scheme_data, $post_id ) {
-			if ( ! empty( $scheme_data ) ) {
-				$subscription_sign_up_fee = ! empty( $scheme_data[ 'subscription_sign_up_fee' ] ) ? $scheme_data[ 'subscription_sign_up_fee' ] : '';
-				$subscription_trial_length = isset( $scheme_data[ 'subscription_trial_length' ] ) ? $scheme_data[ 'subscription_trial_length' ] : 0;
-				$subscription_trial_period = isset( $scheme_data[ 'subscription_trial_period' ] ) ? $scheme_data[ 'subscription_trial_period' ] : '';
-			} else {
-				$subscription_sign_up_fee = '';
-				$subscription_trial_length = 0;
-				$subscription_trial_period = '';
-			}
-
-			// Sign-up Fee
-			woocommerce_wp_text_input( array(
-				'id'          => '_subscription_sign_up_fee',
-				'class'       => 'wc_input_subscription_intial_price',
-				// translators: %s is a currency symbol / code
-				'label'       => sprintf( __( 'Sign-up Fee (%s)', WCSATT_STT::TEXT_DOMAIN ), get_woocommerce_currency_symbol() ),
-				'placeholder' => _x( 'e.g. 9.90', 'example price', WCSATT_STT::TEXT_DOMAIN ),
-				'description' => __( 'Optionally include an amount to be charged at the outset of the subscription. The sign-up fee will be charged immediately, even if the product has a free trial or the payment dates are synced.', WCSATT_STT::TEXT_DOMAIN ),
-				'desc_tip'    => true,
-				'type'        => 'text',
-				'custom_attributes' => array(
-					'step' => 'any',
-					'min'  => '0',
-				),
-				'name'        => 'wcsatt_schemes[' . $index . '][subscription_sign_up_fee]',
-				'value'       => $subscription_sign_up_fee
-			) );
-
-			// Trial Length
-			woocommerce_wp_text_input( array(
-				'id'          => '_subscription_trial_length',
-				'class'       => 'wc_input_subscription_trial_length',
-				'label'       => __( 'Free Trial', WCSATT_STT::TEXT_DOMAIN ),
-				'name'        => 'wcsatt_schemes[' . $index . '][subscription_trial_length]',
-				'value'       => $subscription_trial_length
-			) );
-
-			// Trial Period
-			woocommerce_wp_select( array(
-				'id'          => '_subscription_trial_period',
-				'class'       => 'wc_input_subscription_trial_period',
-				'label'       => __( 'Subscription Trial Period', WCSATT_STT::TEXT_DOMAIN ),
-				'options'     => wcs_get_available_time_periods(),
-				// translators: placeholder is trial period validation message if passed an invalid value (e.g. "Trial period can not exceed 4 weeks")
-				'description' => sprintf( _x( 'An optional period of time to wait before charging the first recurring payment. Any sign up fee will still be charged at the outset of the subscription. %s', 'Trial period dropdown\'s description in pricing fields', WCSATT_STT::TEXT_DOMAIN ), WC_Subscriptions_Admin::get_trial_period_validation_message() ),
-				'desc_tip'    => true,
-				'value'       => WC_Subscriptions_Product::get_trial_period( $post_id ), // Explicitly set value in to ensure backward compatibility
-				'name'        => 'wcsatt_schemes[' . $index . '][subscription_trial_period]',
-				'value'       => $subscription_trial_period
-		) );
-		} // END wcsatt_stt_fields()
-
-		/**
-		 * Filters the subscription scheme data to pass the 
-		 * sign up and trial options when saving.
-		 *
-		 * @param  ini $posted_scheme
-		 * @param  string $product_type
-		 * @return void
-		 */
-		public function wcsatt_stt_process_scheme_data( $posted_scheme, $product_type ) {
-			// Copy variable type fields.
-			if ( 'variable' == $product_type ) {
-				if ( isset( $posted_scheme[ 'subscription_sign_up_fee_variable' ] ) ) {
-					$posted_scheme[ 'subscription_sign_up_fee' ] = $posted_scheme[ 'subscription_sign_up_fee_variable' ];
-				}
-				if ( isset( $posted_scheme[ 'subscription_trial_length_variable' ] ) ) {
-					$posted_scheme[ 'subscription_trial_length' ] = $posted_scheme[ 'subscription_trial_length_variable' ];
-				}
-				if ( isset( $posted_scheme[ 'subscription_trial_period_variable' ] ) ) {
-					$posted_scheme[ 'subscription_trial_period' ] = $posted_scheme[ 'subscription_trial_period_variable'];
-				}
-			}
-
-			// Format subscription sign up fee.
-			if ( isset( $posted_scheme[ 'subscription_sign_up_fee' ] ) ) {
-				$posted_scheme[ 'subscription_sign_up_fee' ] = ( $posted_scheme[ 'subscription_sign_up_fee' ] === '' ) ? '' : wc_format_decimal( $posted_scheme[ 'subscription_sign_up_fee' ] );
-			}
-
-			// Make sure trial period is within allowable range.
-			$subscription_ranges = wcs_get_subscription_ranges();
-			$max_trial_length = count( $subscription_ranges[ $posted_scheme[ 'subscription_trial_period' ] ] ) - 1;
-
-			// Format subscription trial length.
-			if ( isset( $posted_scheme[ 'subscription_trial_length' ] ) && $posted_scheme[ 'subscription_trial_length' ] > $max_trial_length ) {
-				$posted_scheme[ 'subscription_trial_length' ] = ( $posted_scheme[ 'subscription_trial_length' ] === '' ) ? '' : absint( $posted_scheme[ 'subscription_trial_length' ] );
-			}
-
-			// Format subscription trial period.
-			$trial_periods = apply_filters( 'wcsatt_stt_trial_periods', array( 'day', 'week', 'month', 'year' ) );
-			if ( isset( $posted_scheme[ 'subscription_trial_period' ] ) && in_array( $posted_scheme[ 'subscription_trial_period' ], $trial_periods ) ) {
-				$posted_scheme[ 'subscription_trial_period' ] = trim( $posted_scheme[ 'subscription_trial_period' ] );
-			}
-
-			return $posted_scheme;
-		} // END wcsatt_stt_process_scheme_data()
-
-		/**
-		 * Adds the additional subscription scheme data for products with attached subscription schemes.
-		 *
-		 * @param  object     $_product
-		 * @param  array      $subscription_scheme
-		 * @param  WC_Product $product
-		 * @return string
-		 */
-		public function add_sub_scheme_data_price_html( $_product, $subscription_scheme, $product ) {
-			if ( isset( $subscription_scheme[ 'subscription_sign_up_fee' ] ) ) {
-				$_product->subscription_sign_up_fee = $subscription_scheme[ 'subscription_sign_up_fee' ];
-			}
-
-			if ( isset( $subscription_scheme[ 'subscription_trial_length' ] ) ) {
-				$_product->subscription_trial_length = $subscription_scheme[ 'subscription_trial_length' ];
-			}
-
-			if ( isset( $subscription_scheme[ 'subscription_trial_period' ] ) ) {
-				$_product->subscription_trial_period = $subscription_scheme[ 'subscription_trial_period' ];
-			}
-
-			return $_product;
-		} // END add_sub_scheme_data_price_html()
-
-		/**
-		 * Adds the extra subscription scheme data to the product object.
-		 * This allows the subscription price to change the initial and
-		 * recurring subscriptions.
-		 *
-		 * @param  object $_cloned
-		 * @param  array  $subscription_scheme
-		 * @return object
-		 */
-		public function sub_product_scheme_option( $_cloned, $subscription_scheme ) {
-			if ( isset( $subscription_scheme[ 'subscription_sign_up_fee' ] ) && $subscription_scheme[ 'subscription_sign_up_fee' ] > 0 ) {
-				$_cloned->subscription_sign_up_fee = $subscription_scheme[ 'subscription_sign_up_fee' ];
-			}
-
-			if ( isset( $subscription_scheme[ 'subscription_trial_length' ] ) && 0 != $subscription_scheme[ 'subscription_trial_length' ] ) {
-				$_cloned->subscription_trial_length = $subscription_scheme[ 'subscription_trial_length' ];
-				$_cloned->subscription_trial_period = $subscription_scheme[ 'subscription_trial_period' ];
-			}
-
-			return $_cloned;
-		} // END sub_product_scheme_option()
-
-		/**
-		 * Filters the price string to include the sign up fee and/or trial 
-		 * to pass per subscription scheme option.
-		 *
-		 * @param  array $prices
-		 * @param  array $subscription_scheme
-		 * @return array
-		 */
-		public function get_price_string( $prices, $subscription_scheme ) {
-			if ( isset( $subscription_scheme[ 'subscription_sign_up_fee' ] ) && $subscription_scheme[ 'subscription_sign_up_fee' ] > 0 ) {
-				$prices[ 'sign_up_fee' ] = $subscription_scheme[ 'subscription_sign_up_fee' ];
-			}
-
-			if ( isset( $subscription_scheme[ 'subscription_trial_length' ] ) && 0 != $subscription_scheme[ 'subscription_trial_length' ] ) {
-				$prices[ 'trial_length' ] = true;
-			}
-
-			return $prices;
-		} // END get_price_string()
-
-		/**
-		 * Filters the price string to include the sign up 
-		 * fee on the lowest subscription scheme.
-		 *
-		 * @param  array $prices
-		 * @param  array $lowest_subscription_scheme
-		 * @return array
-		 */
-		public function get_lowest_price_string( $prices,  $lowest_subscription_scheme ) {
-			if ( isset( $lowest_subscription_scheme[ 'sign_up_fee' ] ) && $lowest_subscription_scheme[ 'sign_up_fee' ] > 0 ) {
-				$prices[ 'sign_up_fee' ] = $lowest_subscription_scheme[ 'sign_up_fee' ];
-			}
-
-			return $prices;
-		} // END get_lowest_price_string()
-
-		/**
-		 * Adds the sign-up fee to the lowest subscription scheme option.
-		 *
-		 * @param array $data
-		 * @param array $lowest_scheme
-		 * @return array
-		 */
-		public function get_lowest_price_sub_scheme_data( $data, $lowest_scheme ) {
-			if ( isset( $lowest_scheme['subscription_sign_up_fee'] ) && $lowest_scheme['subscription_sign_up_fee'] > 0 ) {
-				$data['sign_up_fee'] = $lowest_scheme['subscription_sign_up_fee'];
-			}
-
-			return $data;
-		} // END get_lowest_price_sub_scheme_data()
-
-		/**
-		 * Adds the sign-up and/or trial data to the subscription scheme prices.
-		 *
-		 * @param  array $prices
-		 * @param  array $subscription_scheme
-		 * @return array
-		 */
-		public function add_subscription_scheme_prices( $prices, $subscription_scheme ) {
-			if ( isset( $subscription_scheme[ 'subscription_sign_up_fee' ] ) ) {
-				$prices[ 'sign_up_fee' ] = $subscription_scheme[ 'subscription_sign_up_fee' ];
-			}
-
-			if ( isset( $subscription_scheme[ 'subscription_trial_length' ] ) ) {
-				$prices[ 'trial_length' ] = $subscription_scheme[ 'subscription_trial_length' ];
-			}
-
-			if ( isset( $subscription_scheme[ 'subscription_trial_period' ] ) ) {
-				$prices[ 'trial_period' ] = $subscription_scheme[ 'subscription_trial_period' ];
-			}
-
-			return $prices;
-		} // END add_subscription_scheme_prices()
-
-		/**
-		 * Updates the cart item data for a subscription product that
-		 * has a sign-up fee and/or trial period applied.
-		 *
-		 * @param  array $cart_item
-		 * @return array
-		 */
-		public function update_cart_item_sub_data( $cart_item ) {
-			$active_scheme = WCS_ATT_Schemes::get_active_subscription_scheme( $cart_item );
-
-			$subscription_prices = WCS_ATT_Scheme_Prices::get_active_subscription_scheme_prices( $cart_item, $active_scheme );
-
-			if ( $active_scheme && $cart_item['data']->is_converted_to_sub == 'yes' ) {
-
-				// Subscription Price
-				$price = $cart_item['data']->subscription_price;
-
-				// Is there a sign up fee?
-				$sign_up_fee = isset( $subscription_prices['sign_up_fee'] ) ? $subscription_prices['sign_up_fee'] : '';
-
-				// Put them both together.
-				$new_price = $price + $sign_up_fee;
-
-				if ( $sign_up_fee > 0 ) {
-					$cart_item['data']->initial_amount = $new_price;
-					$cart_item['data']->subscription_sign_up_fee = $sign_up_fee;
-				}
-
-				$trial_length = isset( $subscription_prices['trial_length'] ) ? $subscription_prices['trial_length'] : 0;
-				$trial_period = isset( $subscription_prices['trial_period'] ) ? $subscription_prices['trial_period'] : '';
-
-				// If a trial length is more than zero then re-adjust the price.
-				if ( $trial_length > 0 ) {
-					$cart_item['data']->subscription_trial_length = $trial_length;
-					$cart_item['data']->subscription_trial_period = $trial_period;
-				} else {
-					$cart_item['data']->subscription_trial_length = 0;
-					$cart_item['data']->subscription_trial_period = '';
-				}
-
-			}
-
-			return $cart_item;
-		} // END update_cart_item_sub_data()
-
-	} // END class
+        public function load_plugin() {
+            global $woocommerce;
+
+            // Check that the required WooCommerce is running.
+            if ( version_compare( $woocommerce->version, self::REQ_WC_VERSION, '<' ) ) {
+                add_action( 'admin_notices', array( $this, 'wcsatt_stt_wc_admin_notice' ) );
+                return false;
+            }
+
+            // Checks that WooCommerce Subscribe All the Things is running or is less than the required version.
+            if ( ! class_exists( 'WCS_ATT' ) || version_compare( WCS_ATT::VERSION, self::REQ_WCSATT_VERSION, '<' ) ) {
+                add_action( 'admin_notices', array( $this, 'wcsatt_stt_admin_notice' ) );
+                return false;
+            }
+        } // END load_plugin()
+
+        /**
+         * Display a warning message if minimum version of WooCommerce check fails.
+         *
+         * @return void
+         */
+        public function wcsatt_stt_wc_admin_notice() {
+            echo '<div class="error"><p>' . sprintf( __( '%1$s requires at least %2$s v%3$s in order to function. Please upgrade %2$s.', 'wc-satt-stt' ), 'Sign up and Trial Options Add-on for WCSATT', 'WooCommerce', self::REQ_WC_VERSION ) . '</p></div>';
+        } // END wcsatt_stt_wc_admin_notice()
+
+        /**
+         * Display a warning message if minimum version of WooCommerce Subscribe All the Things check fails.
+         *
+         * @return void
+         */
+        public function wcsatt_stt_admin_notice() {
+            echo '<div class="error"><p>' . sprintf( __( '%1$s requires at least %2$s v%3$s in order to function. Please upgrade %2$s.', 'wc-satt-stt' ), 'WooCommerce Subscribe All the Things - Sign up and Trial Add-on', 'WooCommerce Subscribe All the Things', self::REQ_WCSATT_VERSION ) . '</p></div>';
+        } // END wcsatt_stt_admin_notice()
+
+        /**
+         * Initialize the plugin if ready.
+         *
+         * @return void
+         */
+        public function init_plugin() {
+            // Load text domain.
+            load_plugin_textdomain( 'wc-satt-stt', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
+
+            // Adds the sign up fee and trial data to the price html on the 'wcsatt_overridden_subscription_prices_product' filter.
+            add_filter( 'wcsatt_overridden_subscription_prices_product', array( $this, 'add_sub_scheme_data_price_html' ), 10, 3 );
+
+            // Adds the extra subscription scheme data to the product object on the 'wcsatt_converted_product_for_scheme_option' filter.
+            add_filter( 'wcsatt_converted_product_for_scheme_option', array( $this, 'sub_product_scheme_option' ), 10, 2 );
+
+            // Filters the price string to include the sign up fee and/or trial to pass per scheme option on the 'wcsatt_single_product_subscription_scheme_price_html' filter.
+            add_filter( 'wcsatt_single_product_subscription_scheme_price_html', array( $this, 'get_price_string' ), 10, 2 );
+
+            // Filters the lowest price string to include the sign up fee on the 'wcsatt_get_single_product_lowest_price_string' filter.
+            add_filter( 'wcsatt_get_single_product_lowest_price_string', array( $this, 'get_lowest_price_string' ), 10, 2 );
+
+            // Filters the lowest price subscription scheme data on the 'wcsatt_get_lowest_price_sub_scheme_data' filter.
+            add_filter( 'wcsatt_get_lowest_price_sub_scheme_data', array( $this, 'get_lowest_price_sub_scheme_data' ), 10, 2 );
+
+            // Adds the sign-up and/or trial data to the subscription scheme prices on the 'wcsatt_subscription_scheme_prices' filter.
+            add_filter( 'wcsatt_subscription_scheme_prices', array( $this, 'add_subscription_scheme_prices' ), 10, 2 );
+
+            // Overrides the price of the subscription for sign up fee and/or trial on the 'wcsatt_cart_item' filter.
+            add_filter( 'wcsatt_cart_item', array( $this, 'update_cart_item_sub_data' ), 10, 1 );
+        } // END init_plugin()
+
+        /**
+         * Register the product meta data fields.
+         *
+         * @return void
+         */
+        public function admin_wcsatt_stt_product_meta() {
+            // Subscription scheme options displayed on the 'wcsatt_subscription_scheme_product_content' action.
+            add_action( 'wcsatt_subscription_scheme_product_content', array( $this, 'wcsatt_stt_fields' ), 15, 3 );
+
+            // Filter the subscription scheme data to process the sign up and trial options on the ''wcsatt_subscription_scheme_process_scheme_data' filter.
+            add_filter( 'wcsatt_subscription_scheme_process_scheme_data', array( $this, 'wcsatt_stt_process_scheme_data' ), 10, 2 );
+        } // END admin_wcsatt_stt_product_meta()
+
+        /**
+         * Show row meta on the plugin screen.
+         *
+         * @param mixed $links Plugin Row Meta
+         * @param mixed $file  Plugin Base file
+         * @return array
+         */
+        public function plugin_meta_links( $links, $file, $data, $status ) {
+            if ( $file == plugin_basename( __FILE__ ) ) {
+                $author1 = '<a href="' . $data[ 'AuthorURI' ] . '">' . $data[ 'Author' ] . '</a>';
+                $author2 = '<a href="http://www.subscriptiongroup.co.uk/">Subscription Group Limited</a>';
+                $links[ 1 ] = sprintf( __( 'By %s', self::TEXT_DOMAIN ), sprintf( __( '%s and %s', self::TEXT_DOMAIN ), $author1, $author2 ) );
+            }
+
+            return $links;
+        } // END plugin_meta_links()
+
+        /**
+         * Adds the default values for subscriptions schemes content.
+         *
+         * @param  array $defaults
+         * @return void
+         */
+        public static function add_default_subscription_schemes_content( $defaults ) {
+            $new_defaults = array(
+                'subscription_sign_up_fee'  => '',
+                'subscription_trial_length' => '',
+                'subscription_trial_period' => ''
+            );
+
+            return array_merge( $new_defaults, $defaults );
+        } // END add_default_subscription_schemes_content()
+
+        /**
+         * Adds the trial and sign up fields under the subscription section.
+         *
+         * @param  int   $index
+         * @param  array $scheme_data
+         * @param  int   $post_id
+         * @return void
+         */
+        public function wcsatt_stt_fields( $index, $scheme_data, $post_id ) {
+            if ( ! empty( $scheme_data ) ) {
+                $subscription_sign_up_fee = ! empty( $scheme_data[ 'subscription_sign_up_fee' ] ) ? $scheme_data[ 'subscription_sign_up_fee' ] : '';
+                $subscription_trial_length = isset( $scheme_data[ 'subscription_trial_length' ] ) ? $scheme_data[ 'subscription_trial_length' ] : 0;
+                $subscription_trial_period = isset( $scheme_data[ 'subscription_trial_period' ] ) ? $scheme_data[ 'subscription_trial_period' ] : '';
+            } else {
+                $subscription_sign_up_fee = '';
+                $subscription_trial_length = 0;
+                $subscription_trial_period = '';
+            }
+
+            // Sign-up Fee
+            woocommerce_wp_text_input( array(
+                'id'          => '_subscription_sign_up_fee',
+                'class'       => 'wc_input_subscription_intial_price',
+                // translators: %s is a currency symbol / code
+                'label'       => sprintf( __( 'Sign-up Fee (%s)', WCSATT_STT::TEXT_DOMAIN ), get_woocommerce_currency_symbol() ),
+                'placeholder' => _x( 'e.g. 9.90', 'example price', WCSATT_STT::TEXT_DOMAIN ),
+                'description' => __( 'Optionally include an amount to be charged at the outset of the subscription. The sign-up fee will be charged immediately, even if the product has a free trial or the payment dates are synced.', WCSATT_STT::TEXT_DOMAIN ),
+                'desc_tip'    => true,
+                'type'        => 'text',
+                'custom_attributes' => array(
+                    'step' => 'any',
+                    'min'  => '0',
+                ),
+                'name'        => 'wcsatt_schemes[' . $index . '][subscription_sign_up_fee]',
+                'value'       => $subscription_sign_up_fee
+            ) );
+
+            // Trial Length
+            woocommerce_wp_text_input( array(
+                'id'          => '_subscription_trial_length',
+                'class'       => 'wc_input_subscription_trial_length',
+                'label'       => __( 'Free Trial', WCSATT_STT::TEXT_DOMAIN ),
+                'name'        => 'wcsatt_schemes[' . $index . '][subscription_trial_length]',
+                'value'       => $subscription_trial_length
+            ) );
+
+            // Trial Period
+            woocommerce_wp_select( array(
+                'id'          => '_subscription_trial_period',
+                'class'       => 'wc_input_subscription_trial_period',
+                'label'       => __( 'Subscription Trial Period', WCSATT_STT::TEXT_DOMAIN ),
+                'options'     => wcs_get_available_time_periods(),
+                // translators: placeholder is trial period validation message if passed an invalid value (e.g. "Trial period can not exceed 4 weeks")
+                'description' => sprintf( _x( 'An optional period of time to wait before charging the first recurring payment. Any sign up fee will still be charged at the outset of the subscription. %s', 'Trial period dropdown\'s description in pricing fields', WCSATT_STT::TEXT_DOMAIN ), WC_Subscriptions_Admin::get_trial_period_validation_message() ),
+                'desc_tip'    => true,
+                'value'       => WC_Subscriptions_Product::get_trial_period( $post_id ), // Explicitly set value in to ensure backward compatibility
+                'name'        => 'wcsatt_schemes[' . $index . '][subscription_trial_period]',
+                'value'       => $subscription_trial_period
+        ) );
+        } // END wcsatt_stt_fields()
+
+        /**
+         * Filters the subscription scheme data to pass the 
+         * sign up and trial options when saving.
+         *
+         * @param  ini $posted_scheme
+         * @param  string $product_type
+         * @return void
+         */
+        public function wcsatt_stt_process_scheme_data( $posted_scheme, $product_type ) {
+            // Copy variable type fields.
+            if ( 'variable' == $product_type ) {
+                if ( isset( $posted_scheme[ 'subscription_sign_up_fee_variable' ] ) ) {
+                    $posted_scheme[ 'subscription_sign_up_fee' ] = $posted_scheme[ 'subscription_sign_up_fee_variable' ];
+                }
+                if ( isset( $posted_scheme[ 'subscription_trial_length_variable' ] ) ) {
+                    $posted_scheme[ 'subscription_trial_length' ] = $posted_scheme[ 'subscription_trial_length_variable' ];
+                }
+                if ( isset( $posted_scheme[ 'subscription_trial_period_variable' ] ) ) {
+                    $posted_scheme[ 'subscription_trial_period' ] = $posted_scheme[ 'subscription_trial_period_variable'];
+                }
+            }
+
+            // Format subscription sign up fee.
+            if ( isset( $posted_scheme[ 'subscription_sign_up_fee' ] ) ) {
+                $posted_scheme[ 'subscription_sign_up_fee' ] = ( $posted_scheme[ 'subscription_sign_up_fee' ] === '' ) ? '' : wc_format_decimal( $posted_scheme[ 'subscription_sign_up_fee' ] );
+            }
+
+            // Make sure trial period is within allowable range.
+            $subscription_ranges = wcs_get_subscription_ranges();
+            $max_trial_length = count( $subscription_ranges[ $posted_scheme[ 'subscription_trial_period' ] ] ) - 1;
+
+            // Format subscription trial length.
+            if ( isset( $posted_scheme[ 'subscription_trial_length' ] ) && $posted_scheme[ 'subscription_trial_length' ] > $max_trial_length ) {
+                $posted_scheme[ 'subscription_trial_length' ] = ( $posted_scheme[ 'subscription_trial_length' ] === '' ) ? '' : absint( $posted_scheme[ 'subscription_trial_length' ] );
+            }
+
+            // Format subscription trial period.
+            $trial_periods = apply_filters( 'wcsatt_stt_trial_periods', array( 'day', 'week', 'month', 'year' ) );
+            if ( isset( $posted_scheme[ 'subscription_trial_period' ] ) && in_array( $posted_scheme[ 'subscription_trial_period' ], $trial_periods ) ) {
+                $posted_scheme[ 'subscription_trial_period' ] = trim( $posted_scheme[ 'subscription_trial_period' ] );
+            }
+
+            return $posted_scheme;
+        } // END wcsatt_stt_process_scheme_data()
+
+        /**
+         * Adds the additional subscription scheme data for products with attached subscription schemes.
+         *
+         * @param  object     $_product
+         * @param  array      $subscription_scheme
+         * @param  WC_Product $product
+         * @return string
+         */
+        public function add_sub_scheme_data_price_html( $_product, $subscription_scheme, $product ) {
+            if ( isset( $subscription_scheme[ 'subscription_sign_up_fee' ] ) ) {
+                $_product->subscription_sign_up_fee = $subscription_scheme[ 'subscription_sign_up_fee' ];
+            }
+
+            if ( isset( $subscription_scheme[ 'subscription_trial_length' ] ) ) {
+                $_product->subscription_trial_length = $subscription_scheme[ 'subscription_trial_length' ];
+            }
+
+            if ( isset( $subscription_scheme[ 'subscription_trial_period' ] ) ) {
+                $_product->subscription_trial_period = $subscription_scheme[ 'subscription_trial_period' ];
+            }
+
+            return $_product;
+        } // END add_sub_scheme_data_price_html()
+
+        /**
+         * Adds the extra subscription scheme data to the product object.
+         * This allows the subscription price to change the initial and
+         * recurring subscriptions.
+         *
+         * @param  object $_cloned
+         * @param  array  $subscription_scheme
+         * @return object
+         */
+        public function sub_product_scheme_option( $_cloned, $subscription_scheme ) {
+            if ( isset( $subscription_scheme[ 'subscription_sign_up_fee' ] ) && $subscription_scheme[ 'subscription_sign_up_fee' ] > 0 ) {
+                $_cloned->subscription_sign_up_fee = $subscription_scheme[ 'subscription_sign_up_fee' ];
+            }
+
+            if ( isset( $subscription_scheme[ 'subscription_trial_length' ] ) && 0 != $subscription_scheme[ 'subscription_trial_length' ] ) {
+                $_cloned->subscription_trial_length = $subscription_scheme[ 'subscription_trial_length' ];
+                $_cloned->subscription_trial_period = $subscription_scheme[ 'subscription_trial_period' ];
+            }
+
+            return $_cloned;
+        } // END sub_product_scheme_option()
+
+        /**
+         * Filters the price string to include the sign up fee and/or trial 
+         * to pass per subscription scheme option.
+         *
+         * @param  array $prices
+         * @param  array $subscription_scheme
+         * @return array
+         */
+        public function get_price_string( $prices, $subscription_scheme ) {
+            if ( isset( $subscription_scheme[ 'subscription_sign_up_fee' ] ) && $subscription_scheme[ 'subscription_sign_up_fee' ] > 0 ) {
+                $prices[ 'sign_up_fee' ] = $subscription_scheme[ 'subscription_sign_up_fee' ];
+            }
+
+            if ( isset( $subscription_scheme[ 'subscription_trial_length' ] ) && 0 != $subscription_scheme[ 'subscription_trial_length' ] ) {
+                $prices[ 'trial_length' ] = true;
+            }
+
+            return $prices;
+        } // END get_price_string()
+
+        /**
+         * Filters the price string to include the sign up 
+         * fee on the lowest subscription scheme.
+         *
+         * @param  array $prices
+         * @param  array $lowest_subscription_scheme
+         * @return array
+         */
+        public function get_lowest_price_string( $prices,  $lowest_subscription_scheme ) {
+            if ( isset( $lowest_subscription_scheme[ 'sign_up_fee' ] ) && $lowest_subscription_scheme[ 'sign_up_fee' ] > 0 ) {
+                $prices[ 'sign_up_fee' ] = $lowest_subscription_scheme[ 'sign_up_fee' ];
+            }
+
+            return $prices;
+        } // END get_lowest_price_string()
+
+        /**
+         * Adds the sign-up fee to the lowest subscription scheme option.
+         *
+         * @param array $data
+         * @param array $lowest_scheme
+         * @return array
+         */
+        public function get_lowest_price_sub_scheme_data( $data, $lowest_scheme ) {
+            if ( isset( $lowest_scheme['subscription_sign_up_fee'] ) && $lowest_scheme['subscription_sign_up_fee'] > 0 ) {
+                $data['sign_up_fee'] = $lowest_scheme['subscription_sign_up_fee'];
+            }
+
+            return $data;
+        } // END get_lowest_price_sub_scheme_data()
+
+        /**
+         * Adds the sign-up and/or trial data to the subscription scheme prices.
+         *
+         * @param  array $prices
+         * @param  array $subscription_scheme
+         * @return array
+         */
+        public function add_subscription_scheme_prices( $prices, $subscription_scheme ) {
+            if ( isset( $subscription_scheme[ 'subscription_sign_up_fee' ] ) ) {
+                $prices[ 'sign_up_fee' ] = $subscription_scheme[ 'subscription_sign_up_fee' ];
+            }
+
+            if ( isset( $subscription_scheme[ 'subscription_trial_length' ] ) ) {
+                $prices[ 'trial_length' ] = $subscription_scheme[ 'subscription_trial_length' ];
+            }
+
+            if ( isset( $subscription_scheme[ 'subscription_trial_period' ] ) ) {
+                $prices[ 'trial_period' ] = $subscription_scheme[ 'subscription_trial_period' ];
+            }
+
+            return $prices;
+        } // END add_subscription_scheme_prices()
+
+        /**
+         * Updates the cart item data for a subscription product that
+         * has a sign-up fee and/or trial period applied.
+         *
+         * @param  array $cart_item
+         * @return array
+         */
+        public function update_cart_item_sub_data( $cart_item ) {
+            $active_scheme = WCS_ATT_Schemes::get_active_subscription_scheme( $cart_item );
+
+            $subscription_prices = WCS_ATT_Scheme_Prices::get_active_subscription_scheme_prices( $cart_item, $active_scheme );
+
+            if ( $active_scheme && $cart_item['data']->is_converted_to_sub == 'yes' ) {
+
+                // Subscription Price
+                $price = $cart_item['data']->subscription_price;
+
+                // Is there a sign up fee?
+                $sign_up_fee = isset( $subscription_prices['sign_up_fee'] ) ? $subscription_prices['sign_up_fee'] : '';
+
+                // Put them both together.
+                $new_price = $price + $sign_up_fee;
+
+                if ( $sign_up_fee > 0 ) {
+                    $cart_item['data']->initial_amount = $new_price;
+                    $cart_item['data']->subscription_sign_up_fee = $sign_up_fee;
+                }
+
+                $trial_length = isset( $subscription_prices['trial_length'] ) ? $subscription_prices['trial_length'] : 0;
+                $trial_period = isset( $subscription_prices['trial_period'] ) ? $subscription_prices['trial_period'] : '';
+
+                // If a trial length is more than zero then re-adjust the price.
+                if ( $trial_length > 0 ) {
+                    $cart_item['data']->subscription_trial_length = $trial_length;
+                    $cart_item['data']->subscription_trial_period = $trial_period;
+                } else {
+                    $cart_item['data']->subscription_trial_length = 0;
+                    $cart_item['data']->subscription_trial_period = '';
+                }
+
+            }
+
+            return $cart_item;
+        } // END update_cart_item_sub_data()
+
+    } // END class
 
 } // END if class exists