Grunion_Contact_Form_Plugin

Complexity

Total Complexity

125

Size/Duplication

Total Lines	1005
Duplicated Lines	0 %

Coupling/Cohesion

Components	3
Dependencies	1

Importance

Changes	1
Bugs	0	Features	1

31 Methods

Rating	Name	Duplication	Size	Complexity
A	strip_tags()	0	16	3
A	init()	0	12	2
A	daily_akismet_meta_cleanup()	0	13	3
C	__construct()	0	101	11
A	admin_menu()	0	10	1
A	allow_feedback_rest_api_type()	0	4	1
C	process_form_submission()	0	71	12
A	ajax_request()	0	19	3
A	insert_feedback_filter()	0	7	3
A	add_shortcode()	0	4	1
A	tokenize_label()	0	3	1
A	sanitize_value()	0	3	1
A	replace_tokens_with_input()	0	16	3
A	track_current_widget()	0	3	1
A	widget_atts()	0	5	1
A	widget_shortcode_hack()	0	17	2
B	prepare_for_akismet()	0	26	6
C	is_spam_akismet()	0	46	12
A	akismet_submit()	0	17	4
B	export_form()	0	46	5
A	get_post_content_for_csv_export()	0	6	1
A	get_post_meta_for_csv_export()	0	3	1
A	get_parsed_field_contents_of_post()	0	3	1
B	map_parsed_field_contents_of_post_to_field_names()	0	23	4
C	get_export_data_for_posts()	0	109	11
C	download_feedback_as_csv()	0	94	10
B	get_feedbacks_as_options()	0	28	2
A	get_field_names()	0	16	3
C	parse_fields_from_content()	0	52	8
B	make_csv_row_from_feedback()	0	28	6
A	get_ip_address()	0	3	2

<?php

/*
Plugin Name: Grunion Contact Form
Description: Add a contact form to any post, page or text widget.  Emails will be sent to the post's author by default, or any email address you choose.  As seen on WordPress.com.
Plugin URI: http://automattic.com/#
AUthor: Automattic, Inc.
Author URI: http://automattic.com/
Version: 2.4
License: GPLv2 or later
*/

define( 'GRUNION_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
define( 'GRUNION_PLUGIN_URL', plugin_dir_url( __FILE__ ) );

if ( is_admin() )
	require_once GRUNION_PLUGIN_DIR . '/admin.php';

/**
 * Sets up various actions, filters, post types, post statuses, shortcodes.
 */
class Grunion_Contact_Form_Plugin {

	/**
	 * @var string The Widget ID of the widget currently being processed.  Used to build the unique contact-form ID for forms embedded in widgets.
	 */
	public $current_widget_id;

	static $using_contact_form_field = false;

The visibility should be declared for property $using_contact_form_field.

	static function init() {
		static $instance = false;

		if ( !$instance ) {
			$instance = new Grunion_Contact_Form_Plugin;

			// Schedule our daily cleanup
			add_action( 'wp_scheduled_delete', array( $instance, 'daily_akismet_meta_cleanup' ) );
		}

		return $instance;
	}

	/**
	 * Runs daily to clean up spam detection metadata after 15 days.  Keeps your DB squeaky clean.
	 */
	public function daily_akismet_meta_cleanup() {
		global $wpdb;

		$feedback_ids = $wpdb->get_col( "SELECT p.ID FROM {$wpdb->posts} as p INNER JOIN {$wpdb->postmeta} as m on m.post_id = p.ID WHERE p.post_type = 'feedback' AND m.meta_key = '_feedback_akismet_values' AND DATE_SUB(NOW(), INTERVAL 15 DAY) > p.post_date_gmt LIMIT 10000" );

		if ( empty( $feedback_ids ) ) {
			return;
		}

		foreach ( $feedback_ids as $feedback_id ) {
			delete_post_meta( $feedback_id, '_feedback_akismet_values' );
		}
	}

		/**
	 * Strips HTML tags from input.  Output is NOT HTML safe.
	 *
	 * @param mixed $data_with_tags
	 * @return mixed
	 */
	public static function strip_tags( $data_with_tags ) {
		if ( is_array( $data_with_tags ) ) {
			foreach ( $data_with_tags as $index => $value ) {
				$index = sanitize_text_field( strval( $index ) );
				$value = wp_kses( strval( $value ), array() );
				$value = str_replace( '&', '&', $value ); // undo damage done by wp_kses_normalize_entities()

				$data_without_tags[ $index ] = $value;

$data_without_tags was never initialized. Although not strictly required by PHP, it is generally a good practice to add $data_without_tags = array(); before regardless.

			}
		} else {
			$data_without_tags = wp_kses( $data_with_tags, array() );
			$data_without_tags = str_replace( '&', '&', $data_without_tags ); // undo damage done by wp_kses_normalize_entities()
		}

		return $data_without_tags;

The variable $data_without_tags does not seem to be defined for all execution paths leading up to this point.

	}

	function __construct() {
		$this->add_shortcode();

		// While generating the output of a text widget with a contact-form shortcode, we need to know its widget ID.
		add_action( 'dynamic_sidebar', array( $this, 'track_current_widget' ) );

		// Add a "widget" shortcode attribute to all contact-form shortcodes embedded in widgets
		add_filter( 'widget_text', array( $this, 'widget_atts' ), 0 );

		// If Text Widgets don't get shortcode processed, hack ours into place.
		if ( !has_filter( 'widget_text', 'do_shortcode' ) )
			add_filter( 'widget_text', array( $this, 'widget_shortcode_hack' ), 5 );

		// Akismet to the rescue
		if ( defined( 'AKISMET_VERSION' ) || function_exists( 'akismet_http_post' ) ) {
			add_filter( 'jetpack_contact_form_is_spam', array( $this, 'is_spam_akismet' ), 10, 2 );
			add_action( 'contact_form_akismet', array( $this, 'akismet_submit' ), 10, 2 );
		}

		add_action( 'loop_start', array( 'Grunion_Contact_Form', '_style_on' ) );

		add_action( 'wp_ajax_grunion-contact-form', array( $this, 'ajax_request' ) );
		add_action( 'wp_ajax_nopriv_grunion-contact-form', array( $this, 'ajax_request' ) );

		// Export to CSV feature
		if ( is_admin() ) {
			add_action( 'admin_init',            array( $this, 'download_feedback_as_csv' ) );
			add_action( 'admin_footer-edit.php', array( $this, 'export_form' ) );
			add_action( 'admin_menu', array( $this, 'admin_menu' ) );
		}

		// custom post type we'll use to keep copies of the feedback items
		register_post_type( 'feedback', array(
			'labels'            => array(
				'name'               => __( 'Feedback', 'jetpack' ),
				'singular_name'      => __( 'Feedback', 'jetpack' ),
				'search_items'       => __( 'Search Feedback', 'jetpack' ),
				'not_found'          => __( 'No feedback found', 'jetpack' ),
				'not_found_in_trash' => __( 'No feedback found', 'jetpack' )
			),
			'menu_icon'         => GRUNION_PLUGIN_URL . '/images/grunion-menu.png',
			'show_ui'           => TRUE,
			'show_in_admin_bar' => FALSE,
			'public'            => FALSE,
			'rewrite'           => FALSE,
			'query_var'         => FALSE,
			'capability_type'   => 'page',
			'show_in_rest'      => true,
			'capabilities'		=> array(
				'create_posts'        => false,
				'publish_posts'       => 'publish_pages',
				'edit_posts'          => 'edit_pages',
				'edit_others_posts'   => 'edit_others_pages',
				'delete_posts'        => 'delete_pages',
				'delete_others_posts' => 'delete_others_pages',
				'read_private_posts'  => 'read_private_pages',
				'edit_post'           => 'edit_page',
				'delete_post'         => 'delete_page',
				'read_post'           => 'read_page',
			),
			'map_meta_cap'		=> true,
		) );

		// Add to REST API post type whitelist
		add_filter( 'rest_api_allowed_post_types', array( $this, 'allow_feedback_rest_api_type' ) );

		// Add "spam" as a post status
		register_post_status( 'spam', array(
			'label'                  => 'Spam',
			'public'                 => FALSE,
			'exclude_from_search'    => TRUE,
			'show_in_admin_all_list' => FALSE,
			'label_count'            => _n_noop( 'Spam <span class="count">(%s)</span>', 'Spam <span class="count">(%s)</span>', 'jetpack' ),
			'protected'              => TRUE,
			'_builtin'               => FALSE
		) );

		// POST handler
		if (
			isset( $_SERVER['REQUEST_METHOD'] ) && 'POST' == strtoupper( $_SERVER['REQUEST_METHOD'] )
		&&
			isset( $_POST['action'] ) && 'grunion-contact-form' == $_POST['action']
		&&
			isset( $_POST['contact-form-id'] )
		) {
			add_action( 'template_redirect', array( $this, 'process_form_submission' ) );
		}

		/* Can be dequeued by placing the following in wp-content/themes/yourtheme/functions.php
		 *
		 * 	function remove_grunion_style() {
		 *		wp_deregister_style('grunion.css');
		 *	}
		 *	add_action('wp_print_styles', 'remove_grunion_style');
		 */
		if( is_rtl() ){
			wp_register_style( 'grunion.css', GRUNION_PLUGIN_URL . 'css/rtl/grunion-rtl.css', array(), JETPACK__VERSION );
		} else {
			wp_register_style( 'grunion.css', GRUNION_PLUGIN_URL . 'css/grunion.css', array(), JETPACK__VERSION );
		}
	}

	/**
	 * Add the 'Export' menu item as a submenu of Feedback.
	 */
	public function admin_menu() {
		add_submenu_page(
			'edit.php?post_type=feedback',
			__( 'Export feedback as CSV', 'jetpack' ),
			__( 'Export CSV', 'jetpack' ),
			'export',
			'feedback-export',
			array( $this, 'export_form' )
		);
	}

	/**
	 * Add to REST API post type whitelist
	 */
	function allow_feedback_rest_api_type( $post_types ) {
		$post_types[] = 'feedback';
		return $post_types;
	}

	/**
	 * Handles all contact-form POST submissions
	 *
	 * Conditionally attached to `template_redirect`
	 */
	function process_form_submission() {
		// Add a filter to replace tokens in the subject field with sanitized field values
		add_filter( 'contact_form_subject', array( $this, 'replace_tokens_with_input' ), 10, 2 );

		$id = stripslashes( $_POST['contact-form-id'] );

		if ( is_user_logged_in() ) {
			check_admin_referer( "contact-form_{$id}" );
		}

		$is_widget = 0 === strpos( $id, 'widget-' );

		$form = false;

$form is not used, you could remove the assignment.

		if ( $is_widget ) {
			// It's a form embedded in a text widget

			$this->current_widget_id = substr( $id, 7 ); // remove "widget-"
			$widget_type = implode( '-', array_slice( explode( '-', $this->current_widget_id ), 0, -1 ) ); // Remove trailing -#

			// Is the widget active?
			$sidebar = is_active_widget( false, $this->current_widget_id, $widget_type );

			// This is lame - no core API for getting a widget by ID
			$widget = isset( $GLOBALS['wp_registered_widgets'][$this->current_widget_id] ) ? $GLOBALS['wp_registered_widgets'][$this->current_widget_id] : false;

			if ( $sidebar && $widget && isset( $widget['callback'] ) ) {
				// This is lamer - no API for outputting a given widget by ID
				ob_start();
				// Process the widget to populate Grunion_Contact_Form::$last
				call_user_func( $widget['callback'], array(), $widget['params'][0] );
				ob_end_clean();
			}
		} else {
			// It's a form embedded in a post

			$post = get_post( $id );

			// Process the content to populate Grunion_Contact_Form::$last
			/** This filter is already documented in core. wp-includes/post-template.php */
			apply_filters( 'the_content', $post->post_content );
		}

		$form = Grunion_Contact_Form::$last;

The property last cannot be accessed from this context as it is declared private in class Grunion_Contact_Form.

		// No form may mean user is using do_shortcode, grab the form using the stored post meta
		if ( ! $form ) {

			// Get shortcode from post meta
			$shortcode = get_post_meta( $_POST['contact-form-id'], '_g_feedback_shortcode', true );

			// Format it
			if ( $shortcode != '' ) {
				$shortcode = '[contact-form]' . $shortcode . '[/contact-form]';
				do_shortcode( $shortcode );

				// Recreate form
				$form = Grunion_Contact_Form::$last;

The property last cannot be accessed from this context as it is declared private in class Grunion_Contact_Form.

			}

			if ( ! $form ) {
				return false;
			}
		}

		if ( is_wp_error( $form->errors ) && $form->errors->get_error_codes() )
			return $form->errors;

		// Process the form
		return $form->process_submission();
	}

	function ajax_request() {
		$submission_result = self::process_form_submission();

		if ( ! $submission_result ) {
			header( "HTTP/1.1 500 Server Error", 500, true );
			echo '<div class="form-error"><ul class="form-errors"><li class="form-error-message">';
			esc_html_e( 'An error occurred. Please try again later.', 'jetpack' );
			echo '</li></ul></div>';
		} elseif ( is_wp_error( $submission_result ) ) {
			header( "HTTP/1.1 400 Bad Request", 403, true );
			echo '<div class="form-error"><ul class="form-errors"><li class="form-error-message">';
			echo esc_html( $submission_result->get_error_message() );
			echo '</li></ul></div>';
		} else {
			echo '<h3>' . esc_html__( 'Message Sent', 'jetpack' ) . '</h3>' . $submission_result;
		}

		die;

The method ajax_request() contains an exit expression.

	}

	/**
	 * Ensure the post author is always zero for contact-form feedbacks
	 * Attached to `wp_insert_post_data`
	 *
	 * @see Grunion_Contact_Form::process_submission()
	 *
	 * @param array $data the data to insert
	 * @param array $postarr the data sent to wp_insert_post()
	 * @return array The filtered $data to insert
	 */
	function insert_feedback_filter( $data, $postarr ) {
		if ( $data['post_type'] == 'feedback' && $postarr['post_type'] == 'feedback' ) {
			$data['post_author'] = 0;
		}

		return $data;
	}
	/*
	 * Adds our contact-form shortcode
	 * The "child" contact-field shortcode is enabled as needed by the contact-form shortcode handler
	 */
	function add_shortcode() {
		add_shortcode( 'contact-form',         array( 'Grunion_Contact_Form', 'parse' ) );
		add_shortcode( 'contact-field',        array( 'Grunion_Contact_Form', 'parse_contact_field' ) );
	}

	static function tokenize_label( $label ) {
		return '{' . trim( preg_replace( '#^\d+_#', '', $label ) ) . '}';
	}

	static function sanitize_value( $value ) {
		return preg_replace( '=((<CR>|<LF>|0x0A/%0A|0x0D/%0D|\\n|\\r)\S).*=i', null, $value );
	}

	/**
	 * Replaces tokens like {city} or {City} (case insensitive) with the value
	 * of an input field of that name
	 *
	 * @param string $subject
	 * @param array $field_values Array with field label => field value associations
	 *
	 * @return string The filtered $subject with the tokens replaced
	 */
	function replace_tokens_with_input( $subject, $field_values ) {
		// Wrap labels into tokens (inside {})
		$wrapped_labels = array_map( array( 'Grunion_Contact_Form_Plugin', 'tokenize_label' ), array_keys( $field_values ) );
		// Sanitize all values
		$sanitized_values = array_map( array( 'Grunion_Contact_Form_Plugin', 'sanitize_value' ), array_values( $field_values ) );

		foreach ( $sanitized_values as $k => $sanitized_value ) {
			if ( is_array( $sanitized_value ) ) {
				$sanitized_values[ $k ] = implode( ', ', $sanitized_value );
			}
		}

		// Search for all valid tokens (based on existing fields) and replace with the field's value
		$subject = str_ireplace( $wrapped_labels, $sanitized_values, $subject );
		return $subject;
	}

	/**
	 * Tracks the widget currently being processed.
	 * Attached to `dynamic_sidebar`
	 *
	 * @see $current_widget_id
	 *
	 * @param array $widget The widget data
	 */
	function track_current_widget( $widget ) {
		$this->current_widget_id = $widget['id'];
	}

	/**
	 * Adds a "widget" attribute to every contact-form embedded in a text widget.
	 * Used to tell the difference between post-embedded contact-forms and widget-embedded contact-forms
	 * Attached to `widget_text`
	 *
	 * @param string $text The widget text
	 * @return string The filtered widget text
	 */
	function widget_atts( $text ) {
		Grunion_Contact_Form::style( true );

		return preg_replace( '/\[contact-form([^a-zA-Z_-])/', '[contact-form widget="' . $this->current_widget_id . '"\\1', $text );
	}

	/**
	 * For sites where text widgets are not processed for shortcodes, we add this hack to process just our shortcode
	 * Attached to `widget_text`
	 *
	 * @param string $text The widget text
	 * @return string The contact-form filtered widget text
	 */
	function widget_shortcode_hack( $text ) {
		if ( !preg_match( '/\[contact-form([^a-zA-Z_-])/', $text ) ) {
			return $text;
		}

		$old = $GLOBALS['shortcode_tags'];
		remove_all_shortcodes();
		Grunion_Contact_Form_Plugin::$using_contact_form_field = true;
		$this->add_shortcode();

		$text = do_shortcode( $text );

		Grunion_Contact_Form_Plugin::$using_contact_form_field = false;
		$GLOBALS['shortcode_tags'] = $old;

		return $text;
	}

	/**
	 * Populate an array with all values necessary to submit a NEW contact-form feedback to Akismet.
	 * Note that this includes the current user_ip etc, so this should only be called when accepting a new item via $_POST
	 *
	 * @param array $form Contact form feedback array
	 * @return array feedback array with additional data ready for submission to Akismet
	 */
	function prepare_for_akismet( $form ) {
		$form['comment_type'] = 'contact_form';
		$form['user_ip']      = $_SERVER['REMOTE_ADDR'];
		$form['user_agent']   = $_SERVER['HTTP_USER_AGENT'];
		$form['referrer']     = $_SERVER['HTTP_REFERER'];
		$form['blog']         = get_option( 'home' );

		foreach ( $_SERVER as $key => $value ) {
			if ( ! is_string( $value ) ) {
				continue;
			}
			if ( in_array( $key, array( 'HTTP_COOKIE', 'HTTP_COOKIE2', 'HTTP_USER_AGENT', 'HTTP_REFERER' ) ) ) {
				// We don't care about cookies, and the UA and Referrer were caught above.
				continue;
			} elseif ( in_array( $key, array( 'REMOTE_ADDR', 'REQUEST_URI', 'DOCUMENT_URI' ) ) ) {
				// All three of these are relevant indicators and should be passed along.
				$form[ $key ] = $value;
			} elseif ( wp_startswith( $key, 'HTTP_' ) ) {
				// Any other HTTP header indicators.
				// `wp_startswith()` is a wpcom helper function and is included in Jetpack via `functions.compat.php`
				$form[ $key ] = $value;
			}
		}

		return $form;
	}

	/**
	 * Submit contact-form data to Akismet to check for spam.
	 * If you're accepting a new item via $_POST, run it Grunion_Contact_Form_Plugin::prepare_for_akismet() first
	 * Attached to `jetpack_contact_form_is_spam`
	 *
	 * @param bool $is_spam
	 * @param array $form
	 * @return bool|WP_Error TRUE => spam, FALSE => not spam, WP_Error => stop processing entirely
	 */
	function is_spam_akismet( $is_spam, $form = array() ) {
		global $akismet_api_host, $akismet_api_port;

		// The signature of this function changed from accepting just $form.
		// If something only sends an array, assume it's still using the old
		// signature and work around it.
		if ( empty( $form ) && is_array( $is_spam ) ) {
			$form = $is_spam;
			$is_spam = false;
		}

		// If a previous filter has alrady marked this as spam, trust that and move on.
		if ( $is_spam ) {
			return $is_spam;
		}

		if ( !function_exists( 'akismet_http_post' ) && !defined( 'AKISMET_VERSION' ) )
			return false;

		$query_string = http_build_query( $form );

		if ( method_exists( 'Akismet', 'http_post' ) ) {
			$response = Akismet::http_post( $query_string, 'comment-check' );
		} else {
			$response = akismet_http_post( $query_string, $akismet_api_host, '/1.1/comment-check', $akismet_api_port );
		}

		$result = false;

		if ( isset( $response[0]['x-akismet-pro-tip'] ) && 'discard' === trim( $response[0]['x-akismet-pro-tip'] ) && get_option( 'akismet_strictness' ) === '1' )
			$result = new WP_Error( 'feedback-discarded', __('Feedback discarded.', 'jetpack' ) );
		elseif ( isset( $response[1] ) && 'true' == trim( $response[1] ) ) // 'true' is spam
			$result = true;

		/**
		 * Filter the results returned by Akismet for each submitted contact form.
		 *
		 * @module contact-form
		 *
		 * @since 1.3.1
		 *
		 * @param WP_Error|bool $result Is the submitted feedback spam.
		 * @param array|bool $form Submitted feedback.
		 */
		return apply_filters( 'contact_form_is_spam_akismet', $result, $form );
	}

	/**
	 * Submit a feedback as either spam or ham
	 *
	 * @param string $as Either 'spam' or 'ham'.
	 * @param array $form the contact-form data
	 */
	function akismet_submit( $as, $form ) {
		global $akismet_api_host, $akismet_api_port;

		if ( !in_array( $as, array( 'ham', 'spam' ) ) )
			return false;

		$query_string = '';
		if ( is_array( $form ) )
			$query_string = http_build_query( $form );
		if ( method_exists( 'Akismet', 'http_post' ) ) {
		    $response = Akismet::http_post( $query_string, "submit-{$as}" );
		} else {
		    $response = akismet_http_post( $query_string, $akismet_api_host, "/1.1/submit-{$as}", $akismet_api_port );
		}

		return trim( $response[1] );
	}

	/**
	 * Prints the menu
	 */
	function export_form() {
		$current_screen = get_current_screen();
		if ( ! in_array( $current_screen->id, array( 'edit-feedback', 'feedback_page_feedback-export' ) ) )
			return;

		if ( ! current_user_can( 'export' ) ) {
			return;
		}

		// if there aren't any feedbacks, bail out
		if ( ! (int) wp_count_posts( 'feedback' )->publish )
			return;
		?>

		<div id="feedback-export" style="display:none">
			<h2><?php _e( 'Export feedback as CSV', 'jetpack' ) ?></h2>
			<div class="clear"></div>
			<form action="<?php echo admin_url( 'admin-post.php' ); ?>" method="post" class="form">
				<?php wp_nonce_field( 'feedback_export','feedback_export_nonce' ); ?>

				<input name="action" value="feedback_export" type="hidden">
				<label for="post"><?php _e( 'Select feedback to download', 'jetpack' ) ?></label>
				<select name="post">
					<option value="all"><?php esc_html_e( 'All posts', 'jetpack' ) ?></option>
					<?php echo $this->get_feedbacks_as_options() ?>
				</select>

				<br><br>
				<input type="submit" name="submit" id="submit" class="button button-primary" value="<?php esc_html_e( 'Download', 'jetpack' ); ?>">
			</form>
		</div>

		<?php
		// There aren't any usable actions in core to output the "export feedback" form in the correct place,
		// so this inline JS moves it from the top of the page to the bottom.
		?>
		<script type='text/javascript'>
		var menu = document.getElementById( 'feedback-export' ),
		wrapper = document.getElementsByClassName( 'wrap' )[0];
		<?php if ( 'edit-feedback' === $current_screen->id ) : ?>
		wrapper.appendChild(menu);
		<?php endif; ?>
		menu.style.display = 'block';
		</script>
		<?php
	}

	/**
	 * Fetch post content for a post and extract just the comment.
	 *
	 * @param int $post_id The post id to fetch the content for.
	 *
	 * @return string Trimmed post comment.
	 *
	 * @codeCoverageIgnore
	 */
	public function get_post_content_for_csv_export( $post_id ) {
		$post_content = get_post_field( 'post_content', $post_id );
		$content      = explode( '<!--more-->', $post_content );

		return trim( $content[0] );
	}

	/**
	 * Get `_feedback_extra_fields` field from post meta data.
	 *
	 * @param int $post_id Id of the post to fetch meta data for.
	 *
	 * @return mixed
	 *
	 * @codeCoverageIgnore - No need to be covered.
	 */
	public function get_post_meta_for_csv_export( $post_id ) {
		return get_post_meta( $post_id, '_feedback_extra_fields', true );
	}

	/**
	 * Get parsed feedback post fields.
	 *
	 * @param int $post_id Id of the post to fetch parsed contents for.
	 *
	 * @return array
	 *
	 * @codeCoverageIgnore - No need to be covered.
	 */
	public function get_parsed_field_contents_of_post( $post_id ) {
		return self::parse_fields_from_content( $post_id );
	}

	/**
	 * Properly maps fields that are missing from the post meta data
	 * to names, that are similar to those of the post meta.
	 *
	 * @param array $parsed_post_content Parsed post content
	 *
	 * @see parse_fields_from_content for how the input data is generated.
	 *
	 * @return array Mapped fields.
	 */
	public function map_parsed_field_contents_of_post_to_field_names( $parsed_post_content ) {

		$mapped_fields = array();

		$field_mapping = array(
			'_feedback_subject'      => __( 'Contact Form', 'jetpack' ),
			'_feedback_author'       => '1_Name',
			'_feedback_author_email' => '2_Email',
			'_feedback_author_url'   => '3_Website',
			'_feedback_main_comment' => '4_Comment',
		);

		foreach ( $field_mapping as $parsed_field_name => $field_name ) {
			if (
				isset( $parsed_post_content[ $parsed_field_name ] )
				&& ! empty( $parsed_post_content[ $parsed_field_name ] )
			) {
				$mapped_fields[ $field_name ] = $parsed_post_content[ $parsed_field_name ];
			}
		}

		return $mapped_fields;
	}


	/**
	 * Prepares feedback post data for CSV export.
	 *
	 * @param array $post_ids Post IDs to fetch the data for. These need to be Feedback posts.
	 *
	 * @return array
	 */
	public function get_export_data_for_posts( $post_ids ) {

		$posts_data  = array();
		$field_names = array();
		$result      = array();

		/**
		 * Fetch posts and get the possible field names for later use
		 */
		foreach ( $post_ids as $post_id ) {

			/**
			 * Fetch post main data, because we need the subject and author data for the feedback form.
			 */
			$post_real_data = $this->get_parsed_field_contents_of_post( $post_id );

			/**
			 * If `$post_real_data` is not an array or there is no `_feedback_subject` set,
			 * then something must be wrong with the feedback post. Skip it.
			 */
			if ( ! is_array( $post_real_data ) || ! isset( $post_real_data['_feedback_subject'] ) ) {
				continue;
			}

			/**
			 * Fetch main post comment. This is from the default textarea fields.
			 * If it is non-empty, then we add it to data, otherwise skip it.
			 */
			$post_comment_content = $this->get_post_content_for_csv_export( $post_id );
			if ( ! empty( $post_comment_content ) ) {
				$post_real_data['_feedback_main_comment'] = $post_comment_content;
			}

			/**
			 * Map parsed fields to proper field names
			 */
			$mapped_fields = $this->map_parsed_field_contents_of_post_to_field_names( $post_real_data );

			/**
			 * Fetch post meta data.
			 */
			$post_meta_data = $this->get_post_meta_for_csv_export( $post_id );

			/**
			 * If `$post_meta_data` is not an array or if it is empty, then there is no
			 * extra feedback to work with. Create an empty array.
			 */
			if ( ! is_array( $post_meta_data ) || empty( $post_meta_data ) ) {
				$post_meta_data = array();
			}

			/**
			 * Prepend the feedback subject to the list of fields.
			 */
			$post_meta_data = array_merge(
				$mapped_fields,
				$post_meta_data
			);


			/**
			 * Save post metadata for later usage.
			 */
			$posts_data[ $post_id ] = $post_meta_data;

			/**
			 * Save field names, so we can use them as header fields later in the CSV.
			 */
			$field_names = array_merge( $field_names, array_keys( $post_meta_data ) );
		}

		/**
		 * Make sure the field names are unique, because we don't want duplicate data.
		 */
		$field_names = array_unique( $field_names );


		/**
		 * Sort the field names by the field id number
		 */
		sort( $field_names, SORT_NUMERIC );

		/**
		 * Loop through every post, which is essentially CSV row.
		 */
		foreach ( $posts_data as $post_id => $single_post_data ) {

			/**
			 * Go through all the possible fields and check if the field is available
			 * in the current post.
			 *
			 * If it is - add the data as a value.
			 * If it is not - add an empty string, which is just a placeholder in the CSV.
			 */
			foreach ( $field_names as $single_field_name ) {
				if (
					isset( $single_post_data[ $single_field_name ] )
					&& ! empty( $single_post_data[ $single_field_name ] )
				) {
					$result[ $single_field_name ][] = trim( $single_post_data[ $single_field_name ] );
				}
				else {
					$result[ $single_field_name ][] = '';
				}
			}
		}

		return $result;
	}

	/**
	 * download as a csv a contact form or all of them in a csv file
	 */
	function download_feedback_as_csv() {
		if ( empty( $_POST['feedback_export_nonce'] ) )
			return;

		check_admin_referer( 'feedback_export', 'feedback_export_nonce' );

		if ( ! current_user_can( 'export' ) ) {
			return;
		}

		$args = array(
			'posts_per_page'   => -1,
			'post_type'        => 'feedback',
			'post_status'      => 'publish',
			'order'            => 'ASC',
			'fields'           => 'ids',
			'suppress_filters' => false,
		);

		$filename = date( "Y-m-d" ) . '-feedback-export.csv';

		// Check if we want to download all the feedbacks or just a certain contact form
		if ( ! empty( $_POST['post'] ) && $_POST['post'] !== 'all' ) {
			$args['post_parent'] = (int) $_POST['post'];
			$filename            = date( "Y-m-d" ) . '-' . str_replace( '&nbsp;', '-', get_the_title( (int) $_POST['post'] ) ) . '.csv';
		}

		$feedbacks = get_posts( $args );

		if ( empty( $feedbacks ) ) {
			return;
		}

		$filename  = sanitize_file_name( $filename );

Equals sign not aligned correctly; expected 1 space but found 2 spaces

		/**
		 * Prepare data for export.
		 */
		$data = $this->get_export_data_for_posts( $feedbacks );

		/**
		 * If `$data` is empty, there's nothing we can do below.
		 */
		if ( ! is_array( $data ) || empty( $data ) ) {
			return;
		}

		/**
		 * Extract field names from `$data` for later use.
		 */
		$fields = array_keys( $data );

		/**
		 * Count how many rows will be exported.
		 */
		$row_count = count( reset( $data ) );


		// Forces the download of the CSV instead of echoing
		header( 'Content-Disposition: attachment; filename=' . $filename );
		header( 'Pragma: no-cache' );
		header( 'Expires: 0' );
		header( 'Content-Type: text/csv; charset=utf-8' );

		$output = fopen( 'php://output', 'w' );

		/**
		 * Print CSV headers
		 */
		fputcsv( $output, $fields );


		/**
		 * Print rows to the output.
		 */
		for ( $i = 0; $i < $row_count; $i ++ ) {

			$current_row = array();

			/**
			 * Put all the fields in `$current_row` array.
			 */
			foreach ( $fields as $single_field_name ) {
				$current_row[] = $data[ $single_field_name ][ $i ];
			}

			/**
			 * Output the complete CSV row
			 */
			fputcsv( $output, $current_row );
		}

		fclose( $output );
	}

	/**
	 * Returns a string of HTML <option> items from an array of posts
	 *
	 * @return string a string of HTML <option> items
	 */
	protected function get_feedbacks_as_options() {
		$options = '';

		// Get the feedbacks' parents' post IDs
		$feedbacks = get_posts( array(
			'fields'           => 'id=>parent',
			'posts_per_page'   => 100000,
			'post_type'        => 'feedback',
			'post_status'      => 'publish',
			'suppress_filters' => false,
		) );
		$parents = array_unique( array_values( $feedbacks ) );

		$posts = get_posts( array(
			'orderby'          => 'ID',
			'posts_per_page'   => 1000,
			'post_type'        => 'any',
			'post__in'         => array_values( $parents ),
			'suppress_filters' => false,
		) );

		// creates the string of <option> elements
		foreach ( $posts as $post ) {
			$options .= sprintf( '<option value="%s">%s</option>', esc_attr( $post->ID ), esc_html( $post->post_title ) );
		}

		return $options;
	}

	/**
	 * Get the names of all the form's fields
	 *
	 * @param  array|int $posts the post we want the fields of
	 *
	 * @return array     the array of fields
	 *
	 * @deprecated As this is no longer necessary as of the CSV export rewrite. - 2015-12-29
	 */
	protected function get_field_names( $posts ) {
		$posts = (array) $posts;
		$all_fields = array();

		foreach ( $posts as $post ){
			$fields = self::parse_fields_from_content( $post );

			if ( isset( $fields['_feedback_all_fields'] ) ) {
				$extra_fields = array_keys( $fields['_feedback_all_fields'] );
				$all_fields = array_merge( $all_fields, $extra_fields );
			}
		}

		$all_fields = array_unique( $all_fields );
		return $all_fields;
	}

	public static function parse_fields_from_content( $post_id ) {
		static $post_fields;

		if ( !is_array( $post_fields ) )
			$post_fields = array();

		if ( isset( $post_fields[$post_id] ) )
			return $post_fields[$post_id];

		$all_values   = array();
		$post_content = get_post_field( 'post_content', $post_id );
		$content      = explode( '<!--more-->', $post_content );
		$lines        = array();

		if ( count( $content ) > 1 ) {
			$content  = str_ireplace( array( '<br />', ')</p>' ), '', $content[1] );
			$one_line = preg_replace( '/\s+/', ' ', $content );
			$one_line = preg_replace( '/.*Array \( (.*)\)/', '$1', $one_line );

			preg_match_all( '/\[([^\]]+)\] =\&gt\; ([^\[]+)/', $one_line, $matches );

			if ( count( $matches ) > 1 )
				$all_values = array_combine( array_map('trim', $matches[1]), array_map('trim', $matches[2]) );

			$lines = array_filter( explode( "\n", $content ) );
		}

		$var_map = array(
			'AUTHOR'       => '_feedback_author',
			'AUTHOR EMAIL' => '_feedback_author_email',
			'AUTHOR URL'   => '_feedback_author_url',
			'SUBJECT'      => '_feedback_subject',
			'IP'           => '_feedback_ip'
		);

		$fields = array();

		foreach( $lines as $line ) {
			$vars = explode( ': ', $line, 2 );
			if ( !empty( $vars ) ) {
				if ( isset( $var_map[$vars[0]] ) ) {
					$fields[$var_map[$vars[0]]] = self::strip_tags( trim( $vars[1] ) );
				}
			}
		}

		$fields['_feedback_all_fields'] = $all_values;

		$post_fields[$post_id] = $fields;

		return $fields;
	}

	/**
	 * Creates a valid csv row from a post id
	 *
	 * @param  int    $post_id The id of the post
	 * @param  array  $fields  An array containing the names of all the fields of the csv
	 * @return String The csv row
	 *
	 * @deprecated This is no longer needed, as of the CSV export rewrite.
	 */
	protected static function make_csv_row_from_feedback( $post_id, $fields ) {
		$content_fields = self::parse_fields_from_content( $post_id );
		$all_fields     = array();

		if ( isset( $content_fields['_feedback_all_fields'] ) )
			$all_fields = $content_fields['_feedback_all_fields'];

		// Overwrite the parsed content with the content we stored in post_meta in a better format.
		$extra_fields   = get_post_meta( $post_id, '_feedback_extra_fields', true );

Equals sign not aligned correctly; expected 1 space but found 3 spaces

		foreach ( $extra_fields as $extra_field => $extra_value ) {
			$all_fields[$extra_field] = $extra_value;
		}

		// The first element in all of the exports will be the subject
		$row_items[] = $content_fields['_feedback_subject'];

$row_items was never initialized. Although not strictly required by PHP, it is generally a good practice to add $row_items = array(); before regardless.

		// Loop the fields array in order to fill the $row_items array correctly
		foreach ( $fields as $field ) {
			if ( $field === __( 'Contact Form', 'jetpack' ) ) // the first field will ever be the contact form, so we can continue
				continue;
			elseif ( array_key_exists( $field, $all_fields ) )
				$row_items[] = $all_fields[$field];
			else
				$row_items[] = '';
		}

		return $row_items;
	}

	public static function get_ip_address() {
		return isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : null;
	}
}

/**
 * Generic shortcode class.
 * Does nothing other than store structured data and output the shortcode as a string
 *
 * Not very general - specific to Grunion.
 */
class Crunion_Contact_Form_Shortcode {

PSR1 recommends that each class should be in its own file to aid autoloaders.

	/**
	 * @var string the name of the shortcode: [$shortcode_name /]
 	 */
	public $shortcode_name;

	/**
	 * @var array key => value pairs for the shortcode's attributes: [$shortcode_name key="value" ... /]
	 */
	public $attributes;

	/**
	 * @var array key => value pair for attribute defaults
	 */
	public $defaults = array();

	/**
	 * @var null|string Null for selfclosing shortcodes.  Hhe inner content of otherwise: [$shortcode_name]$content[/$shortcode_name]
	 */
	public $content;

	/**
	 * @var array Associative array of inner "child" shortcodes equivalent to the $content: [$shortcode_name][child 1/][child 2/][/$shortcode_name]
	 */
	public $fields;

	/**
	 * @var null|string The HTML of the parsed inner "child" shortcodes".  Null for selfclosing shortcodes.
	 */
	public $body;

	/**
	 * @param array $attributes An associative array of shortcode attributes.  @see shortcode_atts()
	 * @param null|string $content Null for selfclosing shortcodes.  The inner content otherwise.
	 */
	function __construct( $attributes, $content = null ) {
		$this->attributes = $this->unesc_attr( $attributes );

It seems like $this->unesc_attr($attributes) of type * is incompatible with the declared type array of property $attributes.

		if ( is_array( $content ) ) {
			$string_content = '';
			foreach ( $content as $field ) {
				$string_content .= (string) $field;
			}

			$this->content = $string_content;
		} else {
			$this->content = $content;
		}

		$this->parse_content( $this->content );
	}

	/**
	 * Processes the shortcode's inner content for "child" shortcodes
	 *
	 * @param string $content The shortcode's inner content: [shortcode]$content[/shortcode]
	 */
	function parse_content( $content ) {
		if ( is_null( $content ) ) {
			$this->body = null;
		}

		$this->body = do_shortcode( $content );
	}

	/**
	 * Returns the value of the requested attribute.
	 *
	 * @param string $key The attribute to retrieve
	 * @return mixed
	 */
	function get_attribute( $key ) {
		return isset( $this->attributes[$key] ) ? $this->attributes[$key] : null;
	}

	function esc_attr( $value ) {
		if ( is_array( $value ) ) {
			return array_map( array( $this, 'esc_attr' ), $value );
		}

		$value = Grunion_Contact_Form_Plugin::strip_tags( $value );
		$value = _wp_specialchars( $value, ENT_QUOTES, false, true );

		// Shortcode attributes can't contain "]"
		$value = str_replace( ']', '', $value );
		$value = str_replace( ',', ',', $value ); // store commas encoded
		$value = strtr( $value, array( '%' => '%25', '&' => '%26' ) );

		// shortcode_parse_atts() does stripcslashes()
		$value = addslashes( $value );
		return $value;
	}

	function unesc_attr( $value ) {
		if ( is_array( $value ) ) {
			return array_map( array( $this, 'unesc_attr' ), $value );
		}

		// For back-compat with old Grunion encoding
		// Also, unencode commas
		$value = strtr( $value, array( '%26' => '&', '%25' => '%' ) );
		$value = preg_replace( array( '/&#x0*22;/i', '/&#x0*27;/i', '/&#x0*26;/i', '/&#x0*2c;/i' ), array( '"', "'", '&', ',' ), $value );
		$value = htmlspecialchars_decode( $value, ENT_QUOTES );
		$value = Grunion_Contact_Form_Plugin::strip_tags( $value );

		return $value;
	}

	/**
	 * Generates the shortcode
	 */
	function __toString() {
		$r = "[{$this->shortcode_name} ";

		foreach ( $this->attributes as $key => $value ) {
			if ( !$value ) {
				continue;
			}

			if ( isset( $this->defaults[$key] ) && $this->defaults[$key] == $value ) {
				continue;
			}

			if ( 'id' == $key ) {
				continue;
			}

			$value = $this->esc_attr( $value );

			if ( is_array( $value ) ) {
				$value = join( ',', $value );
			}

			if ( false === strpos( $value, "'" ) ) {
				$value = "'$value'";
			} elseif ( false === strpos( $value, '"' ) ) {
				$value = '"' . $value . '"';
			} else {
				// Shortcodes can't contain both '"' and "'".  Strip one.
				$value = str_replace( "'", '', $value );
				$value = "'$value'";
			}

			$r .= "{$key}={$value} ";
		}

		$r = rtrim( $r );

		if ( $this->fields ) {

The expression $this->fields of type array is implicitly converted to a boolean; are you sure this is intended? If so, consider using ! empty($expr) instead to make it clear that you intend to check for an array without elements.

			$r .= ']';

			foreach ( $this->fields as $field ) {
				$r .= (string) $field;
			}

			$r .= "[/{$this->shortcode_name}]";
		} else {
			$r .= '/]';
		}

		return $r;
	}
}

/**
 * Class for the contact-form shortcode.
 * Parses shortcode to output the contact form as HTML
 * Sends email and stores the contact form response (a.k.a. "feedback")
 */
class Grunion_Contact_Form extends Crunion_Contact_Form_Shortcode {

PSR1 recommends that each class should be in its own file to aid autoloaders.

	public $shortcode_name = 'contact-form';

	/**
	 * @var WP_Error stores form submission errors
	 */
	public $errors;

	/**
	 * @var Grunion_Contact_Form The most recent (inclusive) contact-form shortcode processed
	 */
	static $last;

The visibility should be declared for property $last.

	/**
	 * @var Whatever form we are currently looking at. If processed, will become $last
	 */
	static $current_form;

The visibility should be declared for property $current_form.

	/**
	 * @var bool Whether to print the grunion.css style when processing the contact-form shortcode
	 */
	static $style = false;

The visibility should be declared for property $style.

	function __construct( $attributes, $content = null ) {
		global $post;

		// Set up the default subject and recipient for this form
		$default_to = '';
		$default_subject = "[" . get_option( 'blogname' ) . "]";

		if ( !empty( $attributes['widget'] ) && $attributes['widget'] ) {
			$default_to .= get_option( 'admin_email' );
			$attributes['id'] = 'widget-' . $attributes['widget'];
			$default_subject = sprintf( _x( '%1$s Sidebar', '%1$s = blog name', 'jetpack' ), $default_subject );
		} else if ( $post ) {
			$attributes['id'] = $post->ID;
			$default_subject = sprintf( _x( '%1$s %2$s', '%1$s = blog name, %2$s = post title', 'jetpack' ), $default_subject, Grunion_Contact_Form_Plugin::strip_tags( $post->post_title ) );
			$post_author = get_userdata( $post->post_author );
			$default_to .= $post_author->user_email;
		}

		// Keep reference to $this for parsing form fields
		self::$current_form = $this;

It seems like $this of type this<Grunion_Contact_Form> is incompatible with the declared type object<Whatever> of property $current_form.

		$this->defaults = array(
			'to'                 => $default_to,
			'subject'            => $default_subject,
			'show_subject'       => 'no', // only used in back-compat mode
			'widget'             => 0,    // Not exposed to the user. Works with Grunion_Contact_Form_Plugin::widget_atts()
			'id'                 => null, // Not exposed to the user. Set above.
			'submit_button_text' => __( 'Submit »', 'jetpack' ),
		);

		$attributes = shortcode_atts( $this->defaults, $attributes, 'contact-form' );

		// We only enable the contact-field shortcode temporarily while processing the contact-form shortcode
		Grunion_Contact_Form_Plugin::$using_contact_form_field = true;

The property using_contact_form_field cannot be accessed from this context as it is declared private in class Grunion_Contact_Form_Plugin.

		parent::__construct( $attributes, $content );

		// There were no fields in the contact form. The form was probably just [contact-form /]. Build a default form.
		if ( empty( $this->fields ) ) {
			// same as the original Grunion v1 form
			$default_form = '
				[contact-field label="' . __( 'Name', 'jetpack' )    . '" type="name"  required="true" /]
				[contact-field label="' . __( 'Email', 'jetpack' )   . '" type="email" required="true" /]
				[contact-field label="' . __( 'Website', 'jetpack' ) . '" type="url" /]';

			if ( 'yes' == strtolower( $this->get_attribute( 'show_subject' ) ) ) {
				$default_form .= '
					[contact-field label="' . __( 'Subject', 'jetpack' ) . '" type="subject" /]';
			}

			$default_form .= '
				[contact-field label="' . __( 'Message', 'jetpack' ) . '" type="textarea" /]';

			$this->parse_content( $default_form );

			// Store the shortcode
			$this->store_shortcode( $default_form, $attributes );
		} else {
			// Store the shortcode
			$this->store_shortcode( $content, $attributes );
		}

		// $this->body and $this->fields have been setup.  We no longer need the contact-field shortcode.
		Grunion_Contact_Form_Plugin::$using_contact_form_field = false;

The property using_contact_form_field cannot be accessed from this context as it is declared private in class Grunion_Contact_Form_Plugin.

	}

	/**
	 * Store shortcode content for recall later
	 *	- used to receate shortcode when user uses do_shortcode
	 *
	 * @param string $content

Should the type for parameter $content not be string|null?

	 */
	static function store_shortcode( $content = null, $attributes = null ) {

		if ( $content != null and isset( $attributes['id'] ) ) {

It seems like you are loosely comparing $content of type string|null against null; this is ambiguous if the string can be empty. Consider using a strict comparison !== instead.

Using logical operators such as and instead of && is generally not recommended.

			$shortcode_meta = get_post_meta( $attributes['id'], '_g_feedback_shortcode', true );

			if ( $shortcode_meta != '' or $shortcode_meta != $content ) {

Using logical operators such as or instead of || is generally not recommended.

				update_post_meta( $attributes['id'], '_g_feedback_shortcode', $content );
			}

		}
	}

	/**
	 * Toggle for printing the grunion.css stylesheet
	 *
	 * @param bool $style
	 */
	static function style( $style ) {
		$previous_style = self::$style;
		self::$style = (bool) $style;
		return $previous_style;
	}

	/**
	 * Turn on printing of grunion.css stylesheet
	 * @see ::style()
	 * @internal
	 * @param bool $style

There is no parameter named $style. Was it maybe removed?

	 */
	static function _style_on() {
		return self::style( true );
	}

	/**
	 * The contact-form shortcode processor
	 *
	 * @param array $attributes Key => Value pairs as parsed by shortcode_parse_atts()
	 * @param string|null $content The shortcode's inner content: [contact-form]$content[/contact-form]
	 * @return string HTML for the concat form.
	 */
	static function parse( $attributes, $content ) {
		// Create a new Grunion_Contact_Form object (this class)
		$form = new Grunion_Contact_Form( $attributes, $content );

		$id = $form->get_attribute( 'id' );

		if ( !$id ) { // something terrible has happened
			return '[contact-form]';
		}

		if ( is_feed() ) {
			return '[contact-form]';
		}

		// Only allow one contact form per post/widget
		if ( self::$last && $id == self::$last->get_attribute( 'id' ) ) {
			// We're processing the same post

			if ( self::$last->attributes != $form->attributes || self::$last->content != $form->content ) {
				// And we're processing a different shortcode;
				return '';
			} // else, we're processing the same shortcode - probably a separate run of do_shortcode() - let it through

		} else {
			self::$last = $form;
		}

		// Enqueue the grunion.css stylesheet if self::$style allows it
		if ( self::$style && ( empty( $_REQUEST['action'] ) || $_REQUEST['action'] != 'grunion_shortcode_to_json' ) ) {
			// Enqueue the style here instead of printing it, because if some other plugin has run the_post()+rewind_posts(),
			// (like VideoPress does), the style tag gets "printed" the first time and discarded, leaving the contact form unstyled.
			// when WordPress does the real loop.
			wp_enqueue_style( 'grunion.css' );
		}

		$r = '';
		$r .= "<div id='contact-form-$id'>\n";

		if ( is_wp_error( $form->errors ) && $form->errors->get_error_codes() ) {
			// There are errors.  Display them
			$r .= "<div class='form-error'>\n<h3>" . __( 'Error!', 'jetpack' ) . "</h3>\n<ul class='form-errors'>\n";
			foreach ( $form->errors->get_error_messages() as $message )
				$r .= "\t<li class='form-error-message'>" . esc_html( $message ) . "</li>\n";
			$r .= "</ul>\n</div>\n\n";
		}

		if ( isset( $_GET['contact-form-id'] ) && $_GET['contact-form-id'] == self::$last->get_attribute( 'id' ) && isset( $_GET['contact-form-sent'] ) ) {
			// The contact form was submitted.  Show the success message/results

			$feedback_id = (int) $_GET['contact-form-sent'];

			$back_url = remove_query_arg( array( 'contact-form-id', 'contact-form-sent', '_wpnonce' ) );

			$r_success_message =
				"<h3>" . __( 'Message Sent', 'jetpack' ) .
				' (<a href="' . esc_url( $back_url ) . '">' . esc_html__( 'go back', 'jetpack' ) . '</a>)' .
				"</h3>\n\n";

			// Don't show the feedback details unless the nonce matches
			if ( $feedback_id && wp_verify_nonce( stripslashes( $_GET['_wpnonce'] ), "contact-form-sent-{$feedback_id}" ) ) {
				$r_success_message .= self::success_message( $feedback_id, $form );
			}

			/**
			 * Filter the message returned after a successfull contact form submission.
			 *
			 * @module contact-form
			 *
			 * @since 1.3.1
			 *
			 * @param string $r_success_message Success message.
			 */
			$r .= apply_filters( 'grunion_contact_form_success_message', $r_success_message );
		} else {
			// Nothing special - show the normal contact form

			if ( $form->get_attribute( 'widget' ) ) {
				// Submit form to the current URL
				$url = remove_query_arg( array( 'contact-form-id', 'contact-form-sent', 'action', '_wpnonce' ) );
			} else {
				// Submit form to the post permalink
				$url = get_permalink();
			}

			// For SSL/TLS page. See RFC 3986 Section 4.2
			$url = set_url_scheme( $url );

			// May eventually want to send this to admin-post.php...
			/**
			 * Filter the contact form action URL.
			 *
			 * @module contact-form
			 *
			 * @since 1.3.1
			 *
			 * @param string $contact_form_id Contact form post URL.
			 * @param $post $GLOBALS['post'] Post global variable.

The doc-type $post could not be parsed: Unknown type name "$post" at position 0. (view supported doc-types)

			 * @param int $id Contact Form ID.
			 */
			$url = apply_filters( 'grunion_contact_form_form_action', "{$url}#contact-form-{$id}", $GLOBALS['post'], $id );

			$r .= "<form action='" . esc_url( $url ) . "' method='post' class='contact-form commentsblock'>\n";
			$r .= $form->body;
			$r .= "\t<p class='contact-submit'>\n";
			$r .= "\t\t<input type='submit' value='" . esc_attr( $form->get_attribute( 'submit_button_text' ) ) . "' class='pushbutton-wide'/>\n";
			if ( is_user_logged_in() ) {
				$r .= "\t\t" . wp_nonce_field( 'contact-form_' . $id, '_wpnonce', true, false ) . "\n"; // nonce and referer
			}
			$r .= "\t\t<input type='hidden' name='contact-form-id' value='$id' />\n";
			$r .= "\t\t<input type='hidden' name='action' value='grunion-contact-form' />\n";
			$r .= "\t</p>\n";
			$r .= "</form>\n";
		}

		$r .= "</div>";

		return $r;
	}

	/**
	 * Returns a success message to be returned if the form is sent via AJAX.
	 *
	 * @param int $feedback_id
	 * @param object Grunion_Contact_Form $form
	 *
	 * @return string $message
	 */
	static function success_message( $feedback_id, $form ) {
		return wp_kses(
			'<blockquote class="contact-form-submission">'
			. '<p>' . join( self::get_compiled_form( $feedback_id, $form ), '</p><p>' ) . '</p>'
			. '</blockquote>',
			array( 'br' => array(), 'blockquote' => array( 'class' => array() ), 'p' => array() )
		);
	}

	/**
	 * Returns a compiled form with labels and values in a form of  an array
	 * of lines.
	 * @param int $feedback_id
	 * @param object Grunion_Contact_Form $form
	 *
	 * @return array $lines
	 */
	static function get_compiled_form( $feedback_id, $form ) {
		$feedback       = get_post( $feedback_id );
		$field_ids      = $form->get_field_ids();
		$content_fields = Grunion_Contact_Form_Plugin::parse_fields_from_content( $feedback_id );

		// Maps field_ids to post_meta keys
		$field_value_map = array(
			'name'     => 'author',
			'email'    => 'author_email',
			'url'      => 'author_url',
			'subject'  => 'subject',
			'textarea' => false, // not a post_meta key.  This is stored in post_content
		);

		$compiled_form = array();

		// "Standard" field whitelist
		foreach ( $field_value_map as $type => $meta_key ) {
			if ( isset( $field_ids[$type] ) ) {
				$field = $form->fields[$field_ids[$type]];

				if ( $meta_key ) {

The expression $meta_key of type string|false is loosely compared to true; this is ambiguous if the string can be empty. You might want to explicitly use !== false instead.

					if ( isset( $content_fields["_feedback_{$meta_key}"] ) )
						$value = $content_fields["_feedback_{$meta_key}"];
				} else {
					// The feedback content is stored as the first "half" of post_content
					$value = $feedback->post_content;
					list( $value ) = explode( '<!--more-->', $value );
					$value = trim( $value );
				}

				$field_index = array_search( $field_ids[ $type ], $field_ids['all'] );
				$compiled_form[ $field_index ] = sprintf(
					'<b>%1$s:</b> %2$s<br /><br />',
					wp_kses( $field->get_attribute( 'label' ), array() ),
					nl2br( wp_kses( $value, array() ) )

The variable $value does not seem to be defined for all execution paths leading up to this point.

				);
			}
		}

		// "Non-standard" fields
		if ( $field_ids['extra'] ) {
			// array indexed by field label (not field id)
			$extra_fields = get_post_meta( $feedback_id, '_feedback_extra_fields', true );
			$extra_field_keys = array_keys( $extra_fields );

			$i = 0;
			foreach ( $field_ids['extra'] as $field_id ) {
				$field = $form->fields[$field_id];
				$field_index = array_search( $field_id, $field_ids['all'] );

				$label = $field->get_attribute( 'label' );

				$compiled_form[ $field_index ] = sprintf(
					'<b>%1$s:</b> %2$s<br /><br />',
					wp_kses( $label, array() ),
					nl2br( wp_kses( $extra_fields[$extra_field_keys[$i]], array() ) )
				);

				$i++;
			}
		}

		// Sorting lines by the field index
		ksort( $compiled_form );

		return $compiled_form;
	}

	/**
	 * The contact-field shortcode processor
	 * We use an object method here instead of a static Grunion_Contact_Form_Field class method to parse contact-field shortcodes so that we can tie them to the contact-form object.
	 *
	 * @param array $attributes Key => Value pairs as parsed by shortcode_parse_atts()
	 * @param string|null $content The shortcode's inner content: [contact-field]$content[/contact-field]
	 * @return HTML for the contact form field
	 */
	static function parse_contact_field( $attributes, $content ) {
		// Don't try to parse contact form fields if not inside a contact form
		if ( ! Grunion_Contact_Form_Plugin::$using_contact_form_field ) {

The property using_contact_form_field cannot be accessed from this context as it is declared private in class Grunion_Contact_Form_Plugin.

			$att_strs = array();
			foreach ( $attributes as $att => $val ) {
				if ( is_numeric( $att ) ) { // Is a valueless attribute
					$att_strs[] = esc_html( $val );
				} else if ( isset( $val ) ) { // A regular attr - value pair
					$att_strs[] = esc_html( $att ) . '=\'' . esc_html( $val ) . '\'';
				}
			}

			$html = '[contact-field ' . implode( ' ', $att_strs );

			if ( isset( $content ) && ! empty( $content ) ) { // If there is content, let's add a closing tag
				$html .=  ']' . esc_html( $content ) . '[/contact-field]';
			} else { // Otherwise let's add a closing slash in the first tag
				$html .= '/]';
			}

			return $html;
		}

		$form = Grunion_Contact_Form::$current_form;

		$field = new Grunion_Contact_Form_Field( $attributes, $content, $form );

		$field_id = $field->get_attribute( 'id' );
		if ( $field_id ) {
			$form->fields[$field_id] = $field;
		} else {
			$form->fields[] = $field;
		}

		if (
			isset( $_POST['action'] ) && 'grunion-contact-form' === $_POST['action']
		&&
			isset( $_POST['contact-form-id'] ) && $form->get_attribute( 'id' ) == $_POST['contact-form-id']
		) {
			// If we're processing a POST submission for this contact form, validate the field value so we can show errors as necessary.
			$field->validate();
		}

		// Output HTML
		return $field->render();
	}

	/**
	 * Loops through $this->fields to generate a (structured) list of field IDs.
	 *
	 * Important: Currently the whitelisted fields are defined as follows:
	 *  `name`, `email`, `url`, `subject`, `textarea`
	 *
	 * If you need to add new fields to the Contact Form, please don't add them
	 * to the whitelisted fields and leave them as extra fields.
	 *
	 * The reasoning behind this is that both the admin Feedback view and the CSV
	 * export will not include any fields that are added to the list of
	 * whitelisted fields without taking proper care to add them to all the
	 * other places where they accessed/used/saved.
	 *
	 * The safest way to add new fields is to add them to the dropdown and the
	 * HTML list ( @see Grunion_Contact_Form_Field::render ) and don't add them
	 * to the list of whitelisted fields. This way they will become a part of the
	 * `extra fields` which are saved in the post meta and will be properly
	 * handled by the admin Feedback view and the CSV Export without any extra
	 * work.
	 *
	 * If there is need to add a field to the whitelisted fields, then please
	 * take proper care to add logic to handle the field in the following places:
	 *
	 *  - Below in the switch statement - so the field is recognized as whitelisted.
	 *
	 *  - Grunion_Contact_Form::process_submission - validation and logic.
	 *
	 *  - Grunion_Contact_Form::process_submission - add the field as an additional
	 *      field in the `post_content` when saving the feedback content.
	 *
	 *  - Grunion_Contact_Form_Plugin::parse_fields_from_content - add mapping
	 *      for the field, defined in the above method.
	 *
	 *  - Grunion_Contact_Form_Plugin::map_parsed_field_contents_of_post_to_field_names -
	 *      add mapping of the field for the CSV Export. Otherwise it will be missing
	 *      from the exported data.
	 *
	 *  - admin.php / grunion_manage_post_columns - add the field to the render logic.
	 *      Otherwise it will be missing from the admin Feedback view.
	 *
	 * @return array
	 */
	function get_field_ids() {
		$field_ids = array(
			'all'   => array(), // array of all field_ids
			'extra' => array(), // array of all non-whitelisted field IDs

			// Whitelisted "standard" field IDs:
			// 'email'    => field_id,
			// 'name'     => field_id,
			// 'url'      => field_id,
			// 'subject'  => field_id,
			// 'textarea' => field_id,
		);

		foreach ( $this->fields as $id => $field ) {
			$field_ids[ 'all' ][] = $id;

			$type = $field->get_attribute( 'type' );
			if ( isset( $field_ids[ $type ] ) ) {
				// This type of field is already present in our whitelist of "standard" fields for this form
				// Put it in extra
				$field_ids[ 'extra' ][] = $id;
				continue;
			}

			/**
			 * See method description before modifying the switch cases.
			 */
			switch ( $type ) {
				case 'email' :
				case 'name' :
				case 'url' :
				case 'subject' :
				case 'textarea' :
					$field_ids[ $type ] = $id;
					break;
			default :

There must be no space before the colon in a DEFAULT statement

				// Put everything else in extra
				$field_ids[ 'extra' ][] = $id;
			}
		}

		return $field_ids;
	}

	/**
	 * Process the contact form's POST submission
	 * Stores feedback.  Sends email.
	 */
	function process_submission() {
		global $post;

		$plugin = Grunion_Contact_Form_Plugin::init();

		$id     = $this->get_attribute( 'id' );
		$to     = $this->get_attribute( 'to' );
		$widget = $this->get_attribute( 'widget' );

		$contact_form_subject = $this->get_attribute( 'subject' );

		$to = str_replace( ' ', '', $to );
		$emails = explode( ',', $to );

		$valid_emails = array();

		foreach ( (array) $emails as $email ) {
			if ( !is_email( $email ) ) {
				continue;
			}

			if ( function_exists( 'is_email_address_unsafe' ) && is_email_address_unsafe( $email ) ) {
				continue;
			}

			$valid_emails[] = $email;
		}

		// No one to send it to, which means none of the "to" attributes are valid emails.
		// Use default email instead.
		if ( !$valid_emails ) {

The expression $valid_emails of type array is implicitly converted to a boolean; are you sure this is intended? If so, consider using empty($expr) instead to make it clear that you intend to check for an array without elements.

			$valid_emails = $this->defaults['to'];
		}

		$to = $valid_emails;

		// Last ditch effort to set a recipient if somehow none have been set.
		if ( empty( $to ) ) {
			$to = get_option( 'admin_email' );
		}

		// Make sure we're processing the form we think we're processing... probably a redundant check.
		if ( $widget ) {
			if ( 'widget-' . $widget != $_POST['contact-form-id'] ) {
				return false;
			}
		} else {
			if ( $post->ID != $_POST['contact-form-id'] ) {
				return false;
			}
		}

		$field_ids = $this->get_field_ids();

		// Initialize all these "standard" fields to null
		$comment_author_email = $comment_author_email_label = // v
		$comment_author       = $comment_author_label       = // v
		$comment_author_url   = $comment_author_url_label   = // v
		$comment_content      = $comment_content_label      = null;

Equals sign not aligned correctly; expected 1 space but found 6 spaces

		// For each of the "standard" fields, grab their field label and value.

		if ( isset( $field_ids['name'] ) ) {
			$field = $this->fields[$field_ids['name']];
			$comment_author = Grunion_Contact_Form_Plugin::strip_tags(
				stripslashes(
					/** This filter is already documented in core/wp-includes/comment-functions.php */
					apply_filters( 'pre_comment_author_name', addslashes( $field->value ) )
				)
			);
			$comment_author_label = Grunion_Contact_Form_Plugin::strip_tags( $field->get_attribute( 'label' ) );
		}

		if ( isset( $field_ids['email'] ) ) {
			$field = $this->fields[$field_ids['email']];
			$comment_author_email = Grunion_Contact_Form_Plugin::strip_tags(
				stripslashes(
					/** This filter is already documented in core/wp-includes/comment-functions.php */
					apply_filters( 'pre_comment_author_email', addslashes( $field->value ) )
				)
			);
			$comment_author_email_label = Grunion_Contact_Form_Plugin::strip_tags( $field->get_attribute( 'label' ) );
		}

		if ( isset( $field_ids['url'] ) ) {
			$field = $this->fields[$field_ids['url']];
			$comment_author_url = Grunion_Contact_Form_Plugin::strip_tags(
				stripslashes(
					/** This filter is already documented in core/wp-includes/comment-functions.php */
					apply_filters( 'pre_comment_author_url', addslashes( $field->value ) )
				)
			);
			if ( 'http://' == $comment_author_url ) {
				$comment_author_url = '';
			}
			$comment_author_url_label = Grunion_Contact_Form_Plugin::strip_tags( $field->get_attribute( 'label' ) );
		}

		if ( isset( $field_ids['textarea'] ) ) {
			$field = $this->fields[$field_ids['textarea']];
			$comment_content = trim( Grunion_Contact_Form_Plugin::strip_tags( $field->value ) );
			$comment_content_label = Grunion_Contact_Form_Plugin::strip_tags( $field->get_attribute( 'label' ) );
		}

		if ( isset( $field_ids['subject'] ) ) {
			$field = $this->fields[$field_ids['subject']];
			if ( $field->value ) {
				$contact_form_subject = Grunion_Contact_Form_Plugin::strip_tags( $field->value );
			}
		}

		$all_values = $extra_values = array();
		$i = 1; // Prefix counter for stored metadata

		// For all fields, grab label and value
		foreach ( $field_ids['all'] as $field_id ) {
			$field = $this->fields[$field_id];
			$label = $i . '_' . $field->get_attribute( 'label' );
			$value = $field->value;

			$all_values[$label] = $value;
			$i++; // Increment prefix counter for the next field
		}

		// For the "non-standard" fields, grab label and value
		// Extra fields have their prefix starting from count( $all_values ) + 1
		foreach ( $field_ids['extra'] as $field_id ) {
			$field = $this->fields[$field_id];
			$label = $i . '_' . $field->get_attribute( 'label' );
			$value = $field->value;

			if ( is_array( $value ) ) {
				$value = implode( ', ', $value );
			}

			$extra_values[$label] = $value;
			$i++; // Increment prefix counter for the next extra field
		}

		$contact_form_subject = trim( $contact_form_subject );

		$comment_author_IP = Grunion_Contact_Form_Plugin::get_ip_address();

		$vars = array( 'comment_author', 'comment_author_email', 'comment_author_url', 'contact_form_subject', 'comment_author_IP' );
		foreach ( $vars as $var )
			$$var = str_replace( array( "\n", "\r" ), '', $$var );

		// Ensure that Akismet gets all of the relevant information from the contact form,
		// not just the textarea field and predetermined subject.
		$akismet_vars = compact( $vars );
		$akismet_vars['comment_content'] = $comment_content;

		foreach ( array_merge( $field_ids['all'], $field_ids['extra'] ) as $field_id ) {
			$field = $this->fields[$field_id];

			// Skip any fields that are just a choice from a pre-defined list. They wouldn't have any value
			// from a spam-filtering point of view.
			if ( in_array( $field->get_attribute( 'type' ), array( 'select', 'checkbox', 'checkbox-multiple', 'radio' ) ) ) {
				continue;
			}

			// Normalize the label into a slug.
			$field_slug = trim( // Strip all leading/trailing dashes.
				preg_replace(   // Normalize everything to a-z0-9_-
					'/[^a-z0-9_]+/',
					'-',
					strtolower( $field->get_attribute( 'label' ) ) // Lowercase
				),
				'-'
			);

			$field_value = ( is_array( $field->value ) ) ? trim( implode( ', ', $field->value ) ) : trim( $field->value );

			// Skip any values that are already in the array we're sending.
			if ( $field_value && in_array( $field_value, $akismet_vars ) ) {
				continue;
			}

			$akismet_vars[ 'contact_form_field_' . $field_slug ] = $field_value;
		}

		$spam = '';
		$akismet_values = $plugin->prepare_for_akismet( $akismet_vars );

		// Is it spam?
		/** This filter is already documented in modules/contact-form/admin.php */
		$is_spam = apply_filters( 'jetpack_contact_form_is_spam', false, $akismet_values );
		if ( is_wp_error( $is_spam ) ) // WP_Error to abort
			return $is_spam; // abort
		elseif ( $is_spam === TRUE )  // TRUE to flag a spam
			$spam = '***SPAM*** ';

		if ( !$comment_author )
			$comment_author = $comment_author_email;

		/**
		 * Filter the email where a submitted feedback is sent.
		 *
		 * @module contact-form
		 *
		 * @since 1.3.1
		 *
		 * @param string|array $to Array of valid email addresses, or single email address.
		 */
		$to = (array) apply_filters( 'contact_form_to', $to );
		foreach ( $to as $to_key => $to_value ) {
			$to[$to_key] = Grunion_Contact_Form_Plugin::strip_tags( $to_value );
		}

		$blog_url = parse_url( site_url() );
		$from_email_addr = 'wordpress@' . $blog_url['host'];

		$reply_to_addr = $to[0];
		if ( ! empty( $comment_author_email ) ) {
			$reply_to_addr = $comment_author_email;
		}

		$headers =  'From: "' . $comment_author  .'" <' . $from_email_addr  . ">\r\n" .
					'Reply-To: "' . $comment_author . '" <' . $reply_to_addr  . ">\r\n" .
					"Content-Type: text/html; charset=\"" . get_option('blog_charset') . "\"";

		/** This filter is already documented in modules/contact-form/admin.php */
		$subject = apply_filters( 'contact_form_subject', $contact_form_subject, $all_values );
		$url     = $widget ? home_url( '/' ) : get_permalink( $post->ID );

		$date_time_format = _x( '%1$s \a\t %2$s', '{$date_format} \a\t {$time_format}', 'jetpack' );
		$date_time_format = sprintf( $date_time_format, get_option( 'date_format' ), get_option( 'time_format' ) );
		$time = date_i18n( $date_time_format, current_time( 'timestamp' ) );

		// keep a copy of the feedback as a custom post type
		$feedback_time   = current_time( 'mysql' );
		$feedback_title  = "{$comment_author} - {$feedback_time}";
		$feedback_status = $is_spam === TRUE ? 'spam' : 'publish';

		foreach ( (array) $akismet_values as $av_key => $av_value ) {
			$akismet_values[$av_key] = Grunion_Contact_Form_Plugin::strip_tags( $av_value );
		}

		foreach ( (array) $all_values as $all_key => $all_value ) {
			$all_values[$all_key] = Grunion_Contact_Form_Plugin::strip_tags( $all_value );
		}

		foreach ( (array) $extra_values as $ev_key => $ev_value ) {
			$extra_values[$ev_key] = Grunion_Contact_Form_Plugin::strip_tags( $ev_value );
		}

		/* We need to make sure that the post author is always zero for contact
		 * form submissions.  This prevents export/import from trying to create
		 * new users based on form submissions from people who were logged in
		 * at the time.
		 *
		 * Unfortunately wp_insert_post() tries very hard to make sure the post
		 * author gets the currently logged in user id.  That is how we ended up
		 * with this work around. */
		add_filter( 'wp_insert_post_data', array( $plugin, 'insert_feedback_filter' ), 10, 2 );

		$post_id = wp_insert_post( array(
			'post_date'    => addslashes( $feedback_time ),
			'post_type'    => 'feedback',
			'post_status'  => addslashes( $feedback_status ),
			'post_parent'  => (int) $post->ID,
			'post_title'   => addslashes( wp_kses( $feedback_title, array() ) ),
			'post_content' => addslashes( wp_kses( $comment_content . "\n<!--more-->\n" . "AUTHOR: {$comment_author}\nAUTHOR EMAIL: {$comment_author_email}\nAUTHOR URL: {$comment_author_url}\nSUBJECT: {$subject}\nIP: {$comment_author_IP}\n" . print_r( $all_values, TRUE ), array() ) ), // so that search will pick up this data
			'post_name'    => md5( $feedback_title ),
		) );

		// once insert has finished we don't need this filter any more
		remove_filter( 'wp_insert_post_data', array( $plugin, 'insert_feedback_filter' ), 10, 2 );

		update_post_meta( $post_id, '_feedback_extra_fields', $this->addslashes_deep( $extra_values ) );

		if ( defined( 'AKISMET_VERSION' ) ) {
			update_post_meta( $post_id, '_feedback_akismet_values', $this->addslashes_deep( $akismet_values ) );
		}

		$message = self::get_compiled_form( $post_id, $this );

		array_push(
			$message,
			"", // Empty line left intentionally
			__( 'Time:', 'jetpack' ) . ' ' . $time . '<br />',
			__( 'IP Address:', 'jetpack' ) . ' ' . $comment_author_IP . '<br />',
			__( 'Contact Form URL:', 'jetpack' ) . " " . $url . '<br />'
		);

		if ( is_user_logged_in() ) {
			array_push(
				$message,
				"",
				sprintf(
					__( 'Sent by a verified %s user.', 'jetpack' ),
					isset( $GLOBALS['current_site']->site_name ) && $GLOBALS['current_site']->site_name ?
						$GLOBALS['current_site']->site_name : '"' . get_option( 'blogname' ) . '"'
				)
			);
		} else {
			array_push( $message, __( 'Sent by an unverified visitor to your site.', 'jetpack' ) );
		}

		$message = join( $message, "\n" );
		/**
		 * Filters the message sent via email after a successfull form submission.
		 *
		 * @module contact-form
		 *
		 * @since 1.3.1
		 *
		 * @param string $message Feedback email message.
		 */
		$message = apply_filters( 'contact_form_message', $message );

		update_post_meta( $post_id, '_feedback_email', $this->addslashes_deep( compact( 'to', 'message' ) ) );

		/**
		 * Fires right before the contact form message is sent via email to
		 * the recipient specified in the contact form.
		 *
		 * @module contact-form
		 *
		 * @since 1.3.1
		 *
		 * @param integer $post_id Post contact form lives on
		 * @param array $all_values Contact form fields
		 * @param array $extra_values Contact form fields not included in $all_values
		 */
		do_action( 'grunion_pre_message_sent', $post_id, $all_values, $extra_values );

		// schedule deletes of old spam feedbacks
		if ( ! wp_next_scheduled( 'grunion_scheduled_delete' ) ) {
			wp_schedule_event( time() + 250, 'daily', 'grunion_scheduled_delete' );
		}

		if (
			$is_spam !== TRUE &&
			/**
			 * Filter to choose whether an email should be sent after each successfull contact form submission.
			 *
			 * @module contact-form
			 *
			 * @since 2.6.0
			 *
			 * @param bool true Should an email be sent after a form submission. Default to true.
			 * @param int $post_id Post ID.
			 */
			true === apply_filters( 'grunion_should_send_email', true, $post_id )
		) {
			wp_mail( $to, "{$spam}{$subject}", $message, $headers );
		} elseif (
			true === $is_spam &&
			/**
			 * Choose whether an email should be sent for each spam contact form submission.
			 *
			 * @module contact-form
			 *
			 * @since 1.3.1
			 *
			 * @param bool false Should an email be sent after a spam form submission. Default to false.
			 */
			apply_filters( 'grunion_still_email_spam', FALSE ) == TRUE
		) { // don't send spam by default.  Filterable.
			wp_mail( $to, "{$spam}{$subject}", $message, $headers );
		}

		if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
			return self::success_message( $post_id, $this );
		}

		$redirect = wp_get_referer();
		if ( !$redirect ) { // wp_get_referer() returns false if the referer is the same as the current page
			$redirect = $_SERVER['REQUEST_URI'];
		}

		$redirect = add_query_arg( urlencode_deep( array(
			'contact-form-id'   => $id,
			'contact-form-sent' => $post_id,
			'_wpnonce'          => wp_create_nonce( "contact-form-sent-{$post_id}" ), // wp_nonce_url HTMLencodes :(
		) ), $redirect );

		/**
		 * Filter the URL where the reader is redirected after submitting a form.
		 *
		 * @module contact-form
		 *
		 * @since 1.9.0
		 *
		 * @param string $redirect Post submission URL.
		 * @param int $id Contact Form ID.
		 * @param int $post_id Post ID.
		 */
		$redirect = apply_filters( 'grunion_contact_form_redirect_url', $redirect, $id, $post_id );

		wp_safe_redirect( $redirect );
		exit;

The method process_submission() contains an exit expression.

	}

	function addslashes_deep( $value ) {
		if ( is_array( $value ) ) {
			return array_map( array( $this, 'addslashes_deep' ), $value );
		} elseif ( is_object( $value ) ) {
			$vars = get_object_vars( $value );
			foreach ( $vars as $key => $data ) {
				$value->{$key} = $this->addslashes_deep( $data );
			}
			return $value;
		}

		return addslashes( $value );
	}
}

/**
 * Class for the contact-field shortcode.
 * Parses shortcode to output the contact form field as HTML.
 * Validates input.
 */
class Grunion_Contact_Form_Field extends Crunion_Contact_Form_Shortcode {

PSR1 recommends that each class should be in its own file to aid autoloaders.

	public $shortcode_name = 'contact-field';

	/**
	 * @var Grunion_Contact_Form parent form
	 */
	public $form;

	/**
	 * @var string default or POSTed value
	 */
	public $value;

	/**
	 * @var bool Is the input invalid?
	 */
	public $error = false;

	/**
	 * @param array $attributes An associative array of shortcode attributes.  @see shortcode_atts()
	 * @param null|string $content Null for selfclosing shortcodes.  The inner content otherwise.
	 * @param Grunion_Contact_Form $form The parent form

Should the type for parameter $form not be Grunion_Contact_Form|null?

	 */
	function __construct( $attributes, $content = null, $form = null ) {
		$attributes = shortcode_atts( array(
			'label'       => null,
			'type'        => 'text',
			'required'    => false,
			'options'     => array(),
			'id'          => null,
			'default'     => null,
			'placeholder' => null,
			'class'       => null,
		), $attributes, 'contact-field' );

		// special default for subject field
		if ( 'subject' == $attributes['type'] && is_null( $attributes['default'] ) && !is_null( $form ) ) {
			$attributes['default'] = $form->get_attribute( 'subject' );
		}

		// allow required=1 or required=true
		if ( '1' == $attributes['required'] || 'true' == strtolower( $attributes['required'] ) )
			$attributes['required'] = true;
		else
			$attributes['required'] = false;

		// parse out comma-separated options list (for selects, radios, and checkbox-multiples)
		if ( !empty( $attributes['options'] ) && is_string( $attributes['options'] ) ) {
			$attributes['options'] = array_map( 'trim', explode( ',', $attributes['options'] ) );
		}

		if ( $form ) {
			// make a unique field ID based on the label, with an incrementing number if needed to avoid clashes
			$form_id = $form->get_attribute( 'id' );
			$id = isset( $attributes['id'] ) ? $attributes['id'] : false;

			$unescaped_label = $this->unesc_attr( $attributes['label'] );
			$unescaped_label = str_replace( '%', '-', $unescaped_label ); // jQuery doesn't like % in IDs?
			$unescaped_label = preg_replace( '/[^a-zA-Z0-9.-_:]/', '', $unescaped_label );

			if ( empty( $id ) ) {
				$id = sanitize_title_with_dashes( 'g' . $form_id . '-' . $unescaped_label );
				$i = 0;
				$max_tries = 99;
				while ( isset( $form->fields[$id] ) ) {
					$i++;
					$id = sanitize_title_with_dashes( 'g' . $form_id . '-' . $unescaped_label . '-' . $i );

					if ( $i > $max_tries ) {
						break;
					}
				}
			}

			$attributes['id'] = $id;
		}

		parent::__construct( $attributes, $content );

		// Store parent form
		$this->form = $form;
	}

	/**
	 * This field's input is invalid.  Flag as invalid and add an error to the parent form
	 *
	 * @param string $message The error message to display on the form.
	 */
	function add_error( $message ) {
		$this->is_error = true;

The property is_error does not exist. Did you maybe forget to declare it?

		if ( !is_wp_error( $this->form->errors ) ) {
			$this->form->errors = new WP_Error;
		}

		$this->form->errors->add( $this->get_attribute( 'id' ), $message );
	}

	/**
	 * Is the field input invalid?
	 *
	 * @see $error
	 *
	 * @return bool
	 */
	function is_error() {
		return $this->error;
	}

	/**
	 * Validates the form input
	 */
	function validate() {
		// If it's not required, there's nothing to validate
		if ( !$this->get_attribute( 'required' ) ) {
			return;
		}

		$field_id    = $this->get_attribute( 'id' );
		$field_type  = $this->get_attribute( 'type' );
		$field_label = $this->get_attribute( 'label' );

		if ( isset( $_POST[ $field_id ] ) ) {
			if ( is_array( $_POST[ $field_id ] ) ) {
				$field_value = array_map( 'stripslashes', $_POST[ $field_id ] );
			} else {
				$field_value = stripslashes( $_POST[ $field_id ] );
			}
		} else {
			$field_value = '';
		}

		switch ( $field_type ) {
		case 'email' :
			// Make sure the email address is valid
			if ( !is_email( $field_value ) ) {
				$this->add_error( sprintf( __( '%s requires a valid email address', 'jetpack' ), $field_label ) );
			}
			break;
		case 'checkbox-multiple' :
			// Check that there is at least one option selected
			if ( empty( $field_value ) ) {
				$this->add_error( sprintf( __( '%s requires at least one selection', 'jetpack' ), $field_label ) );
			}
			break;
		default :

There must be no space before the colon in a DEFAULT statement

			// Just check for presence of any text
			if ( !strlen( trim( $field_value ) ) ) {
				$this->add_error( sprintf( __( '%s is required', 'jetpack' ), $field_label ) );
			}
		}
	}

	/**
	 * Outputs the HTML for this form field
	 *
	 * @return string HTML
	 */
	function render() {
		global $current_user, $user_identity;

		$r = '';

		$field_id          = $this->get_attribute( 'id' );
		$field_type        = $this->get_attribute( 'type' );
		$field_label       = $this->get_attribute( 'label' );
		$field_required    = $this->get_attribute( 'required' );
		$placeholder       = $this->get_attribute( 'placeholder' );
		$class             = $this->get_attribute( 'class' );
		$field_placeholder = ( ! empty( $placeholder ) ) ? "placeholder='" . esc_attr( $placeholder ) . "'" : '';
		$field_class       = "class='" . trim( esc_attr( $field_type ) . " " . esc_attr( $class ) ) . "' ";

		if ( isset( $_POST[ $field_id ] ) ) {
			if ( is_array( $_POST[ $field_id ] ) ) {
				$this->value = array_map( 'stripslashes', $_POST[ $field_id ] );

It seems like array_map('stripslashes', $_POST[$field_id]) of type array is incompatible with the declared type string of property $value.

			} else {
				$this->value = stripslashes( (string) $_POST[ $field_id ] );
			}
		} elseif ( isset( $_GET[ $field_id ] ) ) {
			$this->value = stripslashes( (string) $_GET[ $field_id ] );
		} elseif (
			is_user_logged_in() &&
			( ( defined( 'IS_WPCOM' ) && IS_WPCOM ) ||
			/**
			 * Allow third-party tools to prefill the contact form with the user's details when they're logged in.
			 *
			 * @module contact-form
			 *
			 * @since 3.2.0
			 *
			 * @param bool false Should the Contact Form be prefilled with your details when you're logged in. Default to false.
			 */
			true === apply_filters( 'jetpack_auto_fill_logged_in_user', false )
			)
		) {
			// Special defaults for logged-in users
			switch ( $this->get_attribute( 'type' ) ) {
			case 'email' :
				$this->value = $current_user->data->user_email;
				break;
			case 'name' :
				$this->value = $user_identity;
				break;
			case 'url' :
				$this->value = $current_user->data->user_url;
				break;
			default :

There must be no space before the colon in a DEFAULT statement

				$this->value = $this->get_attribute( 'default' );
			}
		} else {
			$this->value = $this->get_attribute( 'default' );
		}

		$field_value = Grunion_Contact_Form_Plugin::strip_tags( $this->value );
		$field_label = Grunion_Contact_Form_Plugin::strip_tags( $field_label );

		/**
		 * Filter the Contact Form required field text
		 *
		 * @module contact-form
		 *
		 * @since 3.8.0
		 *
		 * @param string $var Required field text. Default is "(required)".
		 */
		$required_field_text = esc_html( apply_filters( 'jetpack_required_field_text', __( "(required)", 'jetpack' ) ) );

		switch ( $field_type ) {
		case 'email' :
			$r .= "\n<div>\n";
			$r .= "\t\t<label for='" . esc_attr( $field_id ) . "' class='grunion-field-label email" . ( $this->is_error() ? ' form-error' : '' ) . "'>" . esc_html( $field_label ) . ( $field_required ? '<span>' . $required_field_text . '</span>' : '' ) . "</label>\n";
			$r .= "\t\t<input type='email' name='" . esc_attr( $field_id ) . "' id='" . esc_attr( $field_id ) . "' value='" . esc_attr( $field_value ) . "' " . $field_class . $field_placeholder . " " . ( $field_required ? "required aria-required='true'" : "" ) . "/>\n";
			$r .= "\t</div>\n";
			break;
		case 'telephone' :
			$r .= "\n<div>\n";
			$r .= "\t\t<label for='" . esc_attr( $field_id ) . "' class='grunion-field-label telephone" . ( $this->is_error() ? ' form-error' : '' ) . "'>" . esc_html( $field_label ) . ( $field_required ? '<span>' . $required_field_text . '</span>' : '' ) . "</label>\n";
			$r .= "\t\t<input type='tel' name='" . esc_attr( $field_id ) . "' id='" . esc_attr( $field_id ) . "' value='" . esc_attr( $field_value ) . "' " . $field_class . $field_placeholder . "/>\n";
			break;
		case 'textarea' :
			$r .= "\n<div>\n";
			$r .= "\t\t<label for='contact-form-comment-" . esc_attr( $field_id ) . "' class='grunion-field-label textarea" . ( $this->is_error() ? ' form-error' : '' ) . "'>" . esc_html( $field_label ) . ( $field_required ? '<span>' . $required_field_text . '</span>' : '' ) . "</label>\n";
			$r .= "\t\t<textarea name='" . esc_attr( $field_id ) . "' id='contact-form-comment-" . esc_attr( $field_id ) . "' rows='20' " . $field_class . $field_placeholder . " " . ( $field_required ? "required aria-required='true'" : "" ) . ">" . esc_textarea( $field_value ) . "</textarea>\n";
			$r .= "\t</div>\n";
			break;
		case 'radio' :
			$r .= "\t<div><label class='grunion-field-label" . ( $this->is_error() ? ' form-error' : '' ) . "'>" . esc_html( $field_label ) . ( $field_required ? '<span>' . $required_field_text . '</span>' : '' ) . "</label>\n";
			foreach ( $this->get_attribute( 'options' ) as $option ) {
				$option = Grunion_Contact_Form_Plugin::strip_tags( $option );
				$r .= "\t\t<label class='grunion-radio-label radio" . ( $this->is_error() ? ' form-error' : '' ) . "'>";
				$r .= "<input type='radio' name='" . esc_attr( $field_id ) . "' value='" . esc_attr( $option ) . "' " . $field_class . checked( $option, $field_value, false ) . " " . ( $field_required ? "required aria-required='true'" : "" ) . "/> ";
				$r .= esc_html( $option ) . "</label>\n";
				$r .= "\t\t<div class='clear-form'></div>\n";
			}
			$r .= "\t\t</div>\n";
			break;
		case 'checkbox' :
			$r .= "\t<div>\n";
			$r .= "\t\t<label class='grunion-field-label checkbox" . ( $this->is_error() ? ' form-error' : '' ) . "'>\n";
			$r .= "\t\t<input type='checkbox' name='" . esc_attr( $field_id ) . "' value='" . esc_attr__( 'Yes', 'jetpack' ) . "' " . $field_class . checked( (bool) $field_value, true, false ) . " " . ( $field_required ? "required aria-required='true'" : "" ) . "/> \n";
			$r .= "\t\t" . esc_html( $field_label ) . ( $field_required ? '<span>'. $required_field_text . '</span>' : '' ) . "</label>\n";
			$r .= "\t\t<div class='clear-form'></div>\n";
			$r .= "\t</div>\n";
			break;
		case 'checkbox-multiple' :
			$r .= "\t<div><label class='grunion-field-label" . ( $this->is_error() ? ' form-error' : '' ) . "'>" . esc_html( $field_label ) . ( $field_required ? '<span>' . $required_field_text . '</span>' : '' ) . "</label>\n";
			foreach ( $this->get_attribute( 'options' ) as $option ) {
				$option = Grunion_Contact_Form_Plugin::strip_tags( $option );
				$r .= "\t\t<label class='grunion-checkbox-multiple-label checkbox-multiple" . ( $this->is_error() ? ' form-error' : '' ) . "'>";
				$r .= "<input type='checkbox' name='" . esc_attr( $field_id ) . "[]' value='" . esc_attr( $option ) . "' " . $field_class . checked( in_array( $option, (array) $field_value ), true, false ) . " /> ";
				$r .= esc_html( $option ) . "</label>\n";
				$r .= "\t\t<div class='clear-form'></div>\n";
			}
			$r .= "\t\t</div>\n";
			break;
		case 'select' :
			$r .= "\n<div>\n";
			$r .= "\t\t<label for='" . esc_attr( $field_id ) . "' class='grunion-field-label select" . ( $this->is_error() ? ' form-error' : '' ) . "'>" . esc_html( $field_label ) . ( $field_required ? '<span>'. $required_field_text . '</span>' : '' ) . "</label>\n";
			$r .= "\t<select name='" . esc_attr( $field_id ) . "' id='" . esc_attr( $field_id ) . "' " . $field_class . ( $field_required ? "required aria-required='true'" : "" ) . ">\n";
			foreach ( $this->get_attribute( 'options' ) as $option ) {
				$option = Grunion_Contact_Form_Plugin::strip_tags( $option );
				$r .= "\t\t<option" . selected( $option, $field_value, false ) . ">" . esc_html( $option ) . "</option>\n";
			}
			$r .= "\t</select>\n";
			$r .= "\t</div>\n";
			break;
		case 'date' :
			$r .= "\n<div>\n";
			$r .= "\t\t<label for='" . esc_attr( $field_id ) . "' class='grunion-field-label " . esc_attr( $field_type ) . ( $this->is_error() ? ' form-error' : '' ) . "'>" . esc_html( $field_label ) . ( $field_required ? '<span>' . $required_field_text . '</span>' : '' ) . "</label>\n";
			$r .= "\t\t<input type='date' name='" . esc_attr( $field_id ) . "' id='" . esc_attr( $field_id ) . "' value='" . esc_attr( $field_value ) . "' " . $field_class . ( $field_required ? "required aria-required='true'" : "" ) . "/>\n";
			$r .= "\t</div>\n";

			wp_enqueue_script( 'grunion-frontend', plugins_url( 'js/grunion-frontend.js', __FILE__ ), array( 'jquery', 'jquery-ui-datepicker' ) );
			break;
		default : // text field

There must be no space before the colon in a DEFAULT statement

			// note that any unknown types will produce a text input, so we can use arbitrary type names to handle
			// input fields like name, email, url that require special validation or handling at POST
			$r .= "\n<div>\n";
			$r .= "\t\t<label for='" . esc_attr( $field_id ) . "' class='grunion-field-label " . esc_attr( $field_type ) . ( $this->is_error() ? ' form-error' : '' ) . "'>" . esc_html( $field_label ) . ( $field_required ? '<span>' . $required_field_text . '</span>' : '' ) . "</label>\n";
			$r .= "\t\t<input type='text' name='" . esc_attr( $field_id ) . "' id='" . esc_attr( $field_id ) . "' value='" . esc_attr( $field_value ) . "' " . $field_class . $field_placeholder . " " . ( $field_required ? "required aria-required='true'" : "" ) . "/>\n";
			$r .= "\t</div>\n";
		}

		/**
		 * Filter the HTML of the Contact Form.
		 *
		 * @module contact-form
		 *
		 * @since 2.6.0
		 *
		 * @param string $r Contact Form HTML output.
		 * @param string $field_label Field label.
		 * @param int|null $id Post ID.
		 */
		return apply_filters( 'grunion_contact_form_field_html', $r, $field_label, ( in_the_loop() ? get_the_ID() : null ) );
	}
}

add_action( 'init', array( 'Grunion_Contact_Form_Plugin', 'init' ) );

add_action( 'grunion_scheduled_delete', 'grunion_delete_old_spam' );

/**
 * Deletes old spam feedbacks to keep the posts table size under control
 */
function grunion_delete_old_spam() {
	global $wpdb;

	$grunion_delete_limit = 100;

	$now_gmt = current_time( 'mysql', 1 );
	$sql = $wpdb->prepare( "
		SELECT `ID`
		FROM $wpdb->posts
		WHERE DATE_SUB( %s, INTERVAL 15 DAY ) > `post_date_gmt`
			AND `post_type` = 'feedback'
			AND `post_status` = 'spam'
		LIMIT %d
	", $now_gmt, $grunion_delete_limit );
	$post_ids = $wpdb->get_col( $sql );

	foreach ( (array) $post_ids as $post_id ) {
		# force a full delete, skip the trash
		wp_delete_post( $post_id, TRUE );
	}

	# Arbitrary check points for running OPTIMIZE
	# nothing special about 5000 or 11
	# just trying to periodically recover deleted rows
	$random_num = mt_rand( 1, 5000 );
	if (
		/**
		 * Filter how often the module run OPTIMIZE TABLE on the core WP tables.
		 *
		 * @module contact-form
		 *
		 * @since 1.3.1
		 *
		 * @param int $random_num Random number.
		 */
		apply_filters( 'grunion_optimize_table', ( $random_num == 11 ) )
	) {
		$wpdb->query( "OPTIMIZE TABLE $wpdb->posts" );
	}

	# if we hit the max then schedule another run
	if ( count( $post_ids ) >= $grunion_delete_limit ) {
		wp_schedule_single_event( time() + 700, 'grunion_scheduled_delete' );
	}
}