bp_media_import_reset_media()

function bp_media_import_reset_media() {
	global $wpdb;

	$bp_media_table        = $wpdb->prefix . 'bp_media';

	$medias = $wpdb->get_results( "SELECT DISTINCT id FROM {$bp_media_table}" );

	if ( ! empty( $medias ) ) {
		$media_ids = array();
		foreach( $medias as $media ) {

			if ( empty( $media->id ) ) {
				continue;
			}

			$media_obj = new BP_Media( $media->id );

			if ( ! empty( $media_obj->activity_id ) && bp_is_active( 'activity' ) ) {
				$activity = new BP_Activity_Activity( (int) $media_obj->activity_id );

				/** This action is documented in bp-activity/bp-activity-actions.php */
				do_action( 'bp_activity_before_action_delete_activity', $activity->id, $activity->user_id );

				// Deleting an activity comment.
				if ( 'activity_comment' == $activity->type ) {
					if ( bp_activity_delete_comment( $activity->item_id, $activity->id ) ) {
						/** This action is documented in bp-activity/bp-activity-actions.php */
						do_action( 'bp_activity_action_delete_activity', $activity->id, $activity->user_id );
					}

					// Deleting an activity.
				} else {
					if ( bp_activity_delete( array( 'id'      => $activity->id,
					                                'user_id' => $activity->user_id
					) ) ) {
						/** This action is documented in bp-activity/bp-activity-actions.php */
						do_action( 'bp_activity_action_delete_activity', $activity->id, $activity->user_id );
					}
				}
			}

			if ( ! empty( $media_obj->id ) ) {
				$media_ids[] = $media_obj->id;
			}
		}

		$media_ids = implode( ',', $media_ids );
		$wpdb->query( "DELETE FROM {$bp_media_table} WHERE id IN ({$media_ids})" );
	}
}