first commit

class-fw-extension-feedback.php

@@ -0,0 +1,219 @@
+<?php if ( ! defined( 'FW' ) ) {
+	die( 'Forbidden' );
+}
+
+class FW_Extension_FeedBack extends FW_Extension {
+
+	/**
+	 * Feature name for post type's, to activate the module for a post type, you must use add_post_type_support () in action 'init'. This module will be replace the default comments.
+	 * http://codex.wordpress.org/Function_Reference/add_post_type_support
+	 * @var string
+	 */
+	public $supports_feature_name = 'fw-feedback';
+
+	/**
+	 * If currently global $post accept reviews
+	 * @var bool
+	 */
+	public $accept_feedback = false;
+
+	public $feedback_on = true;
+
+	/**
+	 * @internal
+	 */
+	public function _init() {
+		$this->add_actions();
+		$this->add_filters();
+	}
+
+	public function add_actions() {
+
+		/** Internal */
+		{
+			add_action( 'wp', array( $this, '_action_global_post_is_available' ) );
+			add_action( 'wp_insert_comment', array( $this, '_action_wp_insert_comment' ), 9999, 2 );
+			add_action( 'transition_comment_status', array( $this, '_action_transition_comment_status' ), 9999, 3 );
+			add_action( 'init', array( $this, '_action_check_if_feedback_is_on' ), 9999 );
+			add_action( 'admin_menu', array( $this, '_action_change_menu_label' ) );
+		}
+
+	}
+
+	public function add_filters() {
+		add_filter( 'preprocess_comment', array( $this, '_filter_pre_process_comment' ) );
+		add_filter( 'admin_comment_types_dropdown', array( $this, '_filter_admin_comment_types_drop_down' ) );
+	}
+
+	public function _action_check_if_feedback_is_on() {
+		$this->feedback_on = false;
+
+		foreach ( get_post_types() as $post_type ) {
+			if ( post_type_supports( $post_type, $this->supports_feature_name ) ) {
+				add_post_type_support($post_type, 'comments');
+				$this->feedback_on = true;
+			}
+		}
+	}
+
+	public function _action_change_menu_label() {
+		if ( $this->feedback_on ) {
+			global $menu;
+			$menu[25][0] = str_replace( 'Comments', __( 'Feedback', 'fw' ), $menu[25][0] );
+		}
+	}
+
+	public function _filter_pre_process_comment( $comment_data ) {
+		if ( post_type_supports( get_post_type( $comment_data['comment_post_ID'] ), $this->supports_feature_name ) ) {
+			$comment_data['comment_type'] = $this->supports_feature_name;
+		}
+
+		return $comment_data;
+	}
+
+	public function _filter_admin_comment_types_drop_down( $comment_types ) {
+
+		if ( $this->feedback_on ) {
+			$comment_types[ $this->supports_feature_name ] = __( 'Reviews', 'fw' );
+		}
+
+		return $comment_types;
+	}
+
+	/**
+	 * Executed when global $post is available
+	 */
+	public function _action_global_post_is_available() {
+		global $post;
+
+		$this->accept_feedback = $post && post_type_supports( get_post_type( $post->ID ), $this->supports_feature_name );
+
+		if ( ! ( $this->accept_feedback && $this->user_bought_product() ) ) {
+			return;
+		}
+	}
+
+	/**
+	 * Check if user bought the current viewing product
+	 */
+	public function user_bought_product( $post_id = null, $user_id = null ) {
+		return true;
+
+	}
+
+	/**
+	 * Executed when new comment is posted
+	 *
+	 * @param int $comment_id
+	 * @param object $comment
+	 */
+	public function _action_wp_insert_comment( $comment_id, $comment ) {
+
+		if ( ! post_type_supports( get_post_type( $comment->comment_post_ID ), $this->supports_feature_name ) ) {
+			return;
+		}
+
+		/** @var int $post_id */
+		$post_id = $comment->comment_post_ID;
+		/** @var int $user_id */
+		$user_id = $comment->user_id;
+
+		/** validate (decide if allow to create feedback) */
+		do {
+			$allow = true;
+
+			if ( ! $this->user_bought_product( $post_id, $user_id ) ) {
+				// cheater, does not bought product, but tries to post comment with injected form in html
+				$allow = false;
+				break;
+			}
+
+			/** to prevent the creation of responses to feedback */
+			if($comment->comment_parent != 0) {
+				$allow = false;
+				break;
+			}
+
+		} while ( false );
+
+
+		$allow = apply_filters( 'fw_ext_feedback_allow_create', $allow, array(
+			'feedback_id' => $comment_id,
+			'post_id'     => $post_id,
+			'user_id'     => $user_id,
+			'comment'     => $comment
+		) );
+
+		if ( ! $allow ) {
+			// delete this comment
+			wp_delete_comment( $comment_id, true );
+
+			return;
+		}
+
+		/**
+		 * remove previous comments by this user on this post, only last feedback is saved
+		 * user is allowed to have only one feedback per post
+		 */
+		foreach (
+			get_comments( array(
+				'post_id' => $post_id,
+				'author_email' => $comment->comment_author_email
+			) ) as $comment
+		) {
+			/** @var object $comment */
+
+			if ( $comment_id != $comment->comment_ID ) // do not delete current comment
+			{
+				wp_delete_comment( $comment->comment_ID, true );
+			}
+		};
+
+		/** everything is ok, tell sub-modules to save other inputs values (feedback-stars, etc.) */
+
+		$active = is_numeric( $comment->comment_approved ) && $comment->comment_approved == 1;
+
+		do_action( 'fw_ext_feedback_insert', $comment_id, array(
+			'active'     => $active,
+			'post_id' => $post_id,
+			'user_id'    => $user_id
+		) );
+	}
+
+	/**
+	 * When comments status changed
+	 * Only two states:
+	 ** active   - true
+	 ** inactive - false
+	 *
+	 * @param string $new_status
+	 * @param string $old_status
+	 * @param object $comment
+	 */
+	public function _action_transition_comment_status( $new_status, $old_status, $comment ) {
+		if ( ! post_type_supports( get_post_type( $comment->comment_post_ID ), $this->supports_feature_name ) ) {
+			return;
+		}
+
+		$active = $new_status === 'approved';
+
+		do_action( 'fw_ext_feedback_status_changed', $active,
+			array(
+				'feedback_id' => $comment->comment_ID,
+				'post_id'     => $comment->comment_post_ID,
+			),
+			array(
+				'comment'            => $comment,
+				'comment_status_new' => $new_status,
+				'comment_status_old' => $old_status,
+			)
+		);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function _get_link() {
+		return 'edit-comments.php';
+	}
+}