/core/activity/sub-activity-class-singlepost.php

<?php

/**
 * BP-MEDIA ACTIVITY STREAM SINGLEPOST CLASS
 * Handles single-item posts in the activity stream
 *
 * @version 0.1.9
 * @since 0.1.9
 * @package BP-Media
 * @subpackage Activity Stream
 * @license GPL v2.0
 * @link http://code.google.com/p/buddypress-media/
 *
 * ========================================================================================================
 */


class BPM_Activity_SinglePost {


        /**
         * Renders a single-item activity stream post
         *
         * @version 0.1.9
         * @since 0.1.9
         * @param int $activity_post_id | ID of the activity stream post
         * @param int $album_id | ID of the album that the media item belongs to
         * @param int $media_id | ID of media item
         * @return string | Text string of post contents
         */

        public static function renderPost($activity_post_id, $album_id, $media_id ){

                global $bp, $wpdb;


                if( empty($activity_post_id) || empty($album_id) || empty($media_id) ){
                    return false;
                }


                // Retrieve the media item to add to the activity stream post
                /////////////////////////////////////////////////////////////////////////////////////////

                $args = array();
                $args['id'] = $media_id;

                $media_items = BPM_Media::query_media($args);
                unset($args);

                $media_item = $media_items[0];

                if($debug){
                    echo "Fetch Full Media Items \n";
                    var_dump($media_items);
                }

                // Generate the html block containing the linked media item thumbnail
                /////////////////////////////////////////////////////////////////////////////////////////
				$args = BPM_Cache::fill_resize_args(array( 'size'=>$bp->bpa->options['media_cache_images_activitySingleDisplaySize'] ));

                $cache_image = bp_media_get_preview_image_data( $args, $media_item );
                unset($args);

                $item_href = bp_core_get_user_domain($media_item->owner_id) . $bp->bpa->options['core_slug_base'] .'/'. $bp->bpa->options['albums_slug_home'] .'/'.
                                         $album_id .'/'. $bp->bpa->options['media_slug_single'] .'/'. $media_item->id;

                $content = '<div class="bpa-activity-wrap" id="default">';
                $content .= '<div class="bpa-activity-singleimage">';

                $content .= '<a class="bpa-activity-link" ';
                $content .= 'title="' . $media_item->title . '" ';
                $content .= 'href="' . $item_href .  '">' . '<img class="bpa-activity-thumb" ';
                $content .= 'height="' . $cache_image['file_h'] . '" ';
                $content .= 'width="' . $cache_image['file_w'] . '" ';
                $content .= 'alt="' . $media_item->description . '" ';
                $content .= 'src="' . $cache_image['url'] . '"></a>';

                $content .= '<div class="bpa-activity-imagecaption">';
                $content .= $media_item->description;
                $content .= '</div>';

                $content .= '</div>';

                
                if($bp->bpa->options['core_favorites_activityShow'] == true) {

                        $content .= BPM_Activity_Favorite::renderTags($activity_post_id);
                }

                $content .= '</div>';

                return $content;

         }




        /**
         * Adds a single media item post to a user's activity stream.
         *
         * BP-Media doesn't post single media items to the activity stream until somebody comments on the
         * item. Otherwise, the activity stream would be flooded with hundreds of posts every time members
         * did a batch upload.
         *
         * Because of the way the BP activity stream works, members can't comment on something unless it's
         * already posted in the activity stream. To get around this limitation, when somebody comments on
         * an item for the first time, this function posts just that one item to the activity stream, so we
         * can attach a comment to it.
         *
         * @version 0.1.9
         * @since 0.1.9
         * @param int $owner_id | ID of the album's owner
         * @param int $album_id | ID of the album that the media item belongs to
         * @param int $media_id | ID of media item
         * @return bool | True on success
         */

        public static function createPost($album_id, $media_id ){

                global $bp, $wpdb;

                // Should we push user activity stream posts to global activity stream
                $post_global = $bp->bpa->options['core_comments_globalStreamEnable'];


                // Retrieve the album that the activity stream post is based on
                /////////////////////////////////////////////////////////////////////////////////////////

                $args = array();
                $args['album_id'] = $album_id;
                $args['owner_id'] = false;

                $album = BPM_Album::query_albums($args);
                $album = $album[0];
                unset($args);

                if($debug){
                    echo "Fetch Album \n";
                    var_dump($album);
                }

                // Retrieve the media item to add to the activity stream post
                /////////////////////////////////////////////////////////////////////////////////////////


                $args = array();
                $args['id'] = $media_id;
                $args['owner_id'] = false;

                $media_items = BPM_Media::query_media($args);
                unset($args);

                $media_item = $media_items[0];

                if($debug){
                    echo "Fetch Full Media Items \n";
                    var_dump($media_items);
                }


                $item_href = bp_core_get_user_domain($media_item->owner_id) . $bp->bpa->options['core_slug_base'] .'/'. $bp->bpa->options['albums_slug_home'] .'/'.
                                         $album_id .'/'. $bp->bpa->options['media_slug_single'] .'/'. $media_item->id;


                $album_href = bp_core_get_user_domain($album->owner_id) . $bp->bpa->options['core_slug_base'] .'/'. $bp->bpa->options['albums_slug_home'] .'/'.
                                         $album_id .'/';

                $action = sprintf( __( '%s - %s from the album %s', "bp-media" ), bp_core_get_userlink($media_item->owner_id), '<a href="'. $item_href .'">'.$media_item->title.'</a>',
                                        '<a href="'. $album_href .'">'.$album->title.'</a>' );


                // If the admin has disabled posts to the global activity stream and the user has set the album's privacy level
                // to public (priv level = 0), increase the privacy level to 1 so it is hidden in the global activity stream

                if(($post_global == false) && ($album->privacy < 2)){
                    $post_privacy = 1;
                } else {
                    $post_privacy = $album->privacy;
                }


                // Generate the activity stream post array
                /////////////////////////////////////////////////////////////////////////////////////////

                $args = array();
                $args['id'] = null;
                $args['action'] = $action;
                $args['component'] = 'bp_album';
                $args['type'] = 'single_item';
                $args['primary_link'] = null;
                $args['user_id'] = $media_item->owner_id;
                $args['item_id'] = $album_id;
                $args['secondary_item_id'] = $media_item->id;
                $args['hide_sitewide'] = $post_privacy;

                if($debug){
                    echo "Full Post Content \n";
                    var_dump($args);
                }

                $activity_id = bp_activity_add($args);

                return $activity_id;

         }





      /**
         * Rebuilds the contents of an existing single-item activity stream post.
         *
         * @version 0.1.9
         * @since 0.1.9
         * @param int $owner_id | ID of the album's owner
         * @param int $album_id | ID of the album the media item belongs to
         * @param int $activity_post_id | ID of the activity stream post
         * @param bool $reset_timestamp | If set to true, the timestamp for the post will be reset to the current time
         * @return bool | True on success
         */

        static function updatePost($owner_id, $media_id, $album_id, $activity_post_id, $reset_timestamp = false){

                global $bp, $wpdb;

                // Should we push user activity stream posts to global activity stream
                $post_global = $bp->bpa->options['core_comments_globalStreamEnable'];


                // Retrieve the album that the activity stream post is based on
                /////////////////////////////////////////////////////////////////////////////////////////

                $args = array();
                $args['album_id'] = $album_id;
                $args['owner_id'] = $owner_id;

                $album = BPM_Album::query_albums($args);
                $album = $album[0];
                unset($args);

                if($debug){
                    echo "updateSinglePost() Fetch Album \n";
                    var_dump($album);
                }


                // Retrieve the media item that the activity stream post is based on
                /////////////////////////////////////////////////////////////////////////////////////////

                $args = array();
                $args['id'] = $media_id;
                $args['owner_id'] = $owner_id;

                $media_items = BPM_Media::query_media($args);
                unset($args);

                $media_item = $media_items[0];

                if($debug){
                    echo "updateSinglePost() Fetch Full Media Items \n";
                    var_dump($media_items);
                }


                $item_href = bp_core_get_user_domain($owner_id) . $bp->bpa->options['core_slug_base'] .'/'. $bp->bpa->options['albums_slug_home'] .'/'.
                                         $album_id .'/'. $bp->bpa->options['media_slug_single'] .'/'. $media_item->id;


                $album_href = bp_core_get_user_domain($owner_id) . $bp->bpa->options['core_slug_base'] .'/'. $bp->bpa->options['albums_slug_home'] .'/'.
                                         $album_id .'/';

                $action = sprintf( __( '%s - %s from the album %s', "bp-media" ), bp_core_get_userlink($owner_id), '<a href="'. $item_href .'">'.$media_item->title.'</a>',
                                        '<a href="'. $album_href .'">'.$album->title.'</a>' );



                // Update the activity stream post
                // /////////////////////////////////////////////////////////////////////////////////////////////////////////


                // If the admin has disabled posts to the global activity stream and the user has set the album's privacy level
                // to public (priv level = 0), increase the privacy level to 1 so it is hidden in the global activity stream

                if(($post_global == false) && ($album->privacy < 2)){
                    $post_privacy = 1;
                } else {
                    $post_privacy = $album->privacy;
                }


                if(!$reset_timestamp){

                    // Since bp_activity_add() resets the timestamp on posts, we cannot use this function for updating activity
                    // stream items. Otherwise, it would bring old posts back to the top of the activity stream when we delete
                    // media items from them. We could get around it by querying the old post and retrieving its timestamp, but
                    // that would require an extra query. Its better to do an update query and use the SQL server properly

                    $sql = $wpdb->prepare("
                            UPDATE          {$bp->activity->table_name}
                            SET             action = %s,
                                            item_id = %d,
                                            hide_sitewide = %d
                            WHERE           id = %d",
                                            $action, $album_id, $post_privacy,
                                            $activity_post_id
                                         );
                    // clear cache
                    wp_cache_delete( 'bp_activity_sitewide_front', 'bp' );

                }
                else {

                    $date_recorded = gmdate( "Y-m-d H:i:s" );

                    $sql = $wpdb->prepare("
                            UPDATE          {$bp->activity->table_name}
                            SET             action = %s,
                                            item_id = %d,
                                            date_recorded = %s,
                                            hide_sitewide = %d
                            WHERE           id = %d",
                                            $action, $album_id, $date_recorded, $post_privacy,
                                            $activity_post_id
                                         );
                    // clear cache
                    wp_cache_delete( 'bp_activity_sitewide_front', 'bp' );

                }

                $result = $wpdb->query($sql);

                if($debug){
                    echo "updateSinglePost()SQL:\n";
                    var_dump($sql);
                    echo "updateSinglePost() Result:\n";
                    var_dump($result);
                }

                return $result;

        }


        
        /**
         * Checks if an activity post is a BP-Media single-item post
         *
         * @version 0.1.9
         * @since 0.1.9
         * @param int $activity_id | ID of the activity item to test
         * @return bool | True on success, false on failure
         */

         public static function isSingleItem($activity_post_id){

                global $bp, $wpdb;

                $sql = $wpdb->prepare("
                        SELECT COUNT(id)
                        FROM            {$bp->activity->table_name}
                        WHERE           id = %d
                        AND             component = 'bp_album'
                        AND             type = 'single_item'",
                                        $activity_post_id
                );

                $item_count = (int)$wpdb->get_var($sql);

                return $item_count;

         }



}

?>