<?php


abstract class WPCOM_JSON_API_Comment_Endpoint extends WPCOM_JSON_API_Endpoint {
	public $comment_object_format = array(
		// explicitly document and cast all output
		'ID'          => '(int) The comment ID.',
		'post'        => "(object>post_reference) A reference to the comment's post.",
		'author'      => '(object>author) The author of the comment.',
		'date'        => "(ISO 8601 datetime) The comment's creation time.",
		'URL'         => '(URL) The full permalink URL to the comment.',
		'short_URL'   => '(URL) The wp.me short URL.',
		'content'     => '(HTML) <code>context</code> dependent.',
		'raw_content' => '(string) Raw comment content.',
		'status'      => array(
			'approved'   => 'The comment has been approved.',
			'unapproved' => 'The comment has been held for review in the moderation queue.',
			'spam'       => 'The comment has been marked as spam.',
			'trash'      => 'The comment is in the trash.',
		),
		'parent' => "(object>comment_reference|false) A reference to the comment's parent, if it has one.",
		'type'   => array(
			'comment'   => 'The comment is a regular comment.',
			'trackback' => 'The comment is a trackback.',
			'pingback'  => 'The comment is a pingback.',
			'review'    => 'The comment is a product review.',
		),
		'like_count'   => '(int) The number of likes for this comment.',
		'i_like'       => '(bool) Does the current user like this comment?',
		'meta'         => '(object) Meta data',
		'can_moderate' => '(bool) Whether current user can moderate the comment.',
	);

	// public $response_format =& $this->comment_object_format;

	function __construct( $args ) {
		if ( !$this->response_format ) {
			$this->response_format =& $this->comment_object_format;
		}
		parent::__construct( $args );
	}

	function get_comment( $comment_id, $context ) {
		global $blog_id;

		$comment = get_comment( $comment_id );
		if ( !$comment || is_wp_error( $comment ) ) {
			return new WP_Error( 'unknown_comment', 'Unknown comment', 404 );
		}

		$types = array( '', 'comment', 'pingback', 'trackback', 'review' );
		if ( !in_array( $comment->comment_type, $types ) ) {
			return new WP_Error( 'unknown_comment', 'Unknown comment', 404 );
		}

		$post = get_post( $comment->comment_post_ID );
		if ( !$post || is_wp_error( $post ) ) {
			return new WP_Error( 'unknown_post', 'Unknown post', 404 );
		}

		$status = wp_get_comment_status( $comment->comment_ID );

		// Permissions
		switch ( $context ) {
		case 'edit' :
			if ( !current_user_can( 'edit_comment', $comment->comment_ID ) ) {
				return new WP_Error( 'unauthorized', 'User cannot edit comment', 403 );
			}

			$GLOBALS['post'] = $post;
			$comment         = get_comment_to_edit( $comment->comment_ID );
			foreach ( array( 'comment_author', 'comment_author_email', 'comment_author_url' ) as $field ) {
				$comment->$field = htmlspecialchars_decode( $comment->$field, ENT_QUOTES );
			}
			break;
		case 'display' :
			if ( 'approved' !== $status ) {
				$current_user_id = get_current_user_id();
				$user_can_read_comment = false;
				if ( $current_user_id && $comment->user_id && $current_user_id == $comment->user_id ) {
					$user_can_read_comment = true;
				} elseif (
					$comment->comment_author_email && $comment->comment_author
				&&
					isset( $this->api->token_details['user'] )
				&&
					isset( $this->api->token_details['user']['user_email'] )
				&&
					$this->api->token_details['user']['user_email'] === $comment->comment_author_email
				&&
					$this->api->token_details['user']['display_name'] === $comment->comment_author
				) {
					$user_can_read_comment = true;
				} else {
					$user_can_read_comment = current_user_can( 'edit_posts' );
				}

				if ( !$user_can_read_comment ) {
					return new WP_Error( 'unauthorized', 'User cannot read unapproved comment', 403 );
				}
			}

			$GLOBALS['post'] = $post;
			setup_postdata( $post );
			break;
		default :
			return new WP_Error( 'invalid_context', 'Invalid API CONTEXT', 400 );
		}

		$can_view = $this->user_can_view_post( $post->ID );
		if ( !$can_view || is_wp_error( $can_view ) ) {
			return $can_view;
		}

		$GLOBALS['comment'] = $comment;
		$response           = array();

		foreach ( array_keys( $this->comment_object_format ) as $key ) {
			switch ( $key ) {
			case 'ID' :
				// explicitly cast all output
				$response[$key] = (int) $comment->comment_ID;
				break;
			case 'post' :
				$response[$key] = (object) array(
					'ID'   => (int) $post->ID,
					'title' => (string) get_the_title( $post->ID ),
					'type' => (string) $post->post_type,
					'link' => (string) $this->links->get_post_link( $this->api->get_blog_id_for_output(), $post->ID ),
				);
				break;
			case 'author' :
				$response[$key] = (object) $this->get_author( $comment, current_user_can( 'edit_comment', $comment->comment_ID ) );
				break;
			case 'date' :
				$response[$key] = (string) $this->format_date( $comment->comment_date_gmt, $comment->comment_date );
				break;
			case 'URL' :
				$response[$key] = (string) esc_url_raw( get_comment_link( $comment->comment_ID ) );
				break;
			case 'short_URL' :
				// @todo - pagination
				$response[$key] = (string) esc_url_raw( wp_get_shortlink( $post->ID ) . "%23comment-{$comment->comment_ID}" );
				break;
			case 'content' :
				if ( 'display' === $context ) {
					ob_start();
					comment_text();
					$response[$key] = (string) ob_get_clean();
				} else {
					$response[$key] = (string) $comment->comment_content;
				}
				break;
			case 'raw_content':
				$response[$key] = (string) $comment->comment_content;
				break;
			case 'status' :
				$response[$key] = (string) $status;
				break;
			case 'parent' : // (object|false)
				if ( $comment->comment_parent ) {
					$parent = get_comment( $comment->comment_parent );
					$response[$key] = (object) array(
						'ID'   => (int) $parent->comment_ID,
						'type' => (string) ( $parent->comment_type ? $parent->comment_type : 'comment' ),
						'link' => (string) $this->links->get_comment_link( $blog_id, $parent->comment_ID ),
					);
				} else {
					$response[$key] = false;
				}
				break;
			case 'type' :
				$response[$key] = (string) ( $comment->comment_type ? $comment->comment_type : 'comment' );
				break;
			case 'like_count' :
				if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
					$response[ $key ] = (int) $this->api->comment_like_count( $blog_id, $post->ID, $comment->comment_ID );
				}
				break;
			case 'i_like' :
				if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
					$response[ $key ] = (bool) Likes::comment_like_current_user_likes( $blog_id, $comment->comment_ID );
				}
				break;
			case 'meta' :
				$response[$key] = (object) array(
					'links' => (object) array(
						'self'    => (string) $this->links->get_comment_link( $this->api->get_blog_id_for_output(), $comment->comment_ID ),
						'help'    => (string) $this->links->get_comment_link( $this->api->get_blog_id_for_output(), $comment->comment_ID, 'help' ),
						'site'    => (string) $this->links->get_site_link( $this->api->get_blog_id_for_output() ),
						'post'    => (string) $this->links->get_post_link( $this->api->get_blog_id_for_output(), $comment->comment_post_ID ),
						'replies' => (string) $this->links->get_comment_link( $this->api->get_blog_id_for_output(), $comment->comment_ID, 'replies/' ),
						'likes'   => (string) $this->links->get_comment_link( $this->api->get_blog_id_for_output(), $comment->comment_ID, 'likes/' ),
					),
				);
				break;
			case 'can_moderate':
				$response[ $key ] = (bool) current_user_can( 'edit_comment', $comment_id );
				break;
			}
		}

		unset( $GLOBALS['comment'], $GLOBALS['post'] );
		return $response;
	}
}

