<?php
/**
 * File for the ShareaholicNotifier class.
 *
 * @package shareaholic
 */

/**
 * An interface to the publisher notification API
 *
 * @package shareaholic
 */
class ShareaholicNotifier {
	/**
	 * The url of the publisher API
	 */

	const URL = 'https://api.shareaholic.com/publisher/1.0';

	/**
	 * Handles publishing or updating a post
	 *
	 * @param  string $post_id the post id
	 * @return bool   whether the request worked
	 */
	public static function post_notify( $post_id ) {
		global $wpdb;
		$post = get_post( $post_id );
		$url  = get_permalink( $post_id );
		$tags = wp_get_post_tags( $post_id, array( 'fields' => 'names' ) );

		$categories = array_map( array( 'ShareaholicNotifier', 'post_notify_iterator' ), get_the_category( $post_id ) );

		if ( $post->post_author ) {
			$author_data = get_userdata( $post->post_author );
			$author_name = $author_data->display_name;
		}

		$notification = array(
			'url'         => $url,
			'api_key'     => ShareaholicUtilities::get_option( 'api_key' ),
			'content'     => array(
				'title'              => $post->post_title,
				'excerpt'            => $post->post_excerpt,
				'body'               => $post->post_content,
				'featured-image-url' => ShareaholicUtilities::permalink_thumbnail( $post_id ),
			),
			'metadata'    => array(
				'author-id'       => $post->post_author,
				'author-name'     => $author_name,
				'post-type'       => $post->post_type,
				'post-id'         => $post_id,
				'post-tags'       => $tags,
				'post-categories' => $categories,
				'post-language'   => get_bloginfo( 'language' ),
				'published'       => $post->post_date_gmt,
				'updated'         => get_lastpostmodified( 'GMT' ),
				'visibility'      => $post->post_status,
			),
			'diagnostics' => array(
				'platform'            => 'wordpress',
				'platform-version'    => get_bloginfo( 'version' ),
				'shareaholic-version' => Shareaholic::VERSION,
				'wp-multisite'        => is_multisite(),
				'wp-theme'            => get_option( 'template' ),
				'wp-posts-total'      => $wpdb->get_var( "SELECT count(ID) FROM $wpdb->posts where post_type = 'post' AND post_status = 'publish'" ),
				'wp-pages-total'      => $wpdb->get_var( "SELECT count(ID) FROM $wpdb->posts where post_type = 'page' AND post_status = 'publish'" ),
				'wp-comments-total'   => wp_count_comments()->approved,
				'wp-users-total'      => $wpdb->get_var( "SELECT count(ID) FROM $wpdb->users" ),
			),
		);

		return self::send_notification( $notification );
	}

	/**
	 * Because PHP < 5.3 doesn't allow anonymous functions, this
	 * is the mapping function used in the method above.
	 *
	 * @param Category $category
	 * @return string
	 */
	private static function post_notify_iterator( $category ) {
		return $category->name;
	}

	/**
	 * Actually sends the request to the notification API
	 *
	 * @param  array $notification an associative array of data
	 *                             to send to the API
	 * @return bool
	 */
	private static function send_notification( $notification ) {
		$url      = self::URL . '/notify';
		$response = ShareaholicCurl::post( $url, $notification, 'json' );

		if ( $response && preg_match( '/20*/', $response['response']['code'] ) ) {
			return true;
		} else {
			return false;
		}
	}
}