<?php

/**

 * bbPress BuddyPress Activity Class

 *

 * @package bbPress

 * @subpackage BuddyPress

 */

// Exit if accessed directly

if ( !defined( 'ABSPATH' ) ) exit;

if ( !class_exists( 'BBP_BuddyPress_Activity' ) ) :

/**

 * Loads BuddyPress Activity extension

 *

 * @since bbPress (r3395)

 *

 * @package bbPress

 * @subpackage BuddyPress

 */

class BBP_BuddyPress_Activity {

	/** Variables *************************************************************/

	/**

	 * The name of the BuddyPress component, used in activity streams

	 *

	 * @var string

	 */

	private $component = '';

	/**

	 * Forum Create Activty Action

	 *

	 * @var string

	 */

	private $forum_create = '';

	/**

	 * Topic Create Activty Action

	 *

	 * @var string

	 */

	private $topic_create = '';

	/**

	 * Topic Close Activty Action

	 *

	 * @var string

	 */

	private $topic_close = '';

	/**

	 * Topic Edit Activty Action

	 *

	 * @var string

	 */

	private $topic_edit = '';

	/**

	 * Topic Open Activty Action

	 *

	 * @var string

	 */

	private $topic_open = '';

	/**

	 * Reply Create Activty Action

	 *

	 * @var string

	 */

	private $reply_create = '';

	/**

	 * Reply Edit Activty Action

	 *

	 * @var string

	 */

	private $reply_edit = '';

	/** Setup Methods *********************************************************/

	/**

	 * The bbPress BuddyPress Activity loader

	 *

	 * @since bbPress (r3395)

	 */

	public function __construct() {

		$this->setup_globals();

		$this->setup_actions();

		$this->setup_filters();

		$this->fully_loaded();

	}

	/**

	 * Extension variables

	 *

	 * @since bbPress (r3395)

	 * @access private

	 * @uses apply_filters() Calls various filters

	 */

	private function setup_globals() {

		// The name of the BuddyPress component, used in activity streams

		$this->component = 'bbpress';

		// Forums

		$this->forum_create = 'bbp_forum_create';

		// Topics

		$this->topic_create = 'bbp_topic_create';

		$this->topic_edit   = 'bbp_topic_edit';

		$this->topic_close  = 'bbp_topic_close';

		$this->topic_open   = 'bbp_topic_open';

		// Replies

		$this->reply_create = 'bbp_reply_create';

		$this->reply_edit   = 'bbp_reply_edit';

	}

	/**

	 * Setup the actions

	 *

	 * @since bbPress (r3395)

	 * @access private

	 * @uses add_filter() To add various filters

	 * @uses add_action() To add various actions

	 */

	private function setup_actions() {

		// Register the activity stream actions

		add_action( 'bp_register_activity_actions',      array( $this, 'register_activity_actions' )        );

		// Hook into topic and reply creation

		add_action( 'bbp_new_topic',                     array( $this, 'topic_create'              ), 10, 4 );

		add_action( 'bbp_new_reply',                     array( $this, 'reply_create'              ), 10, 5 );

		// Hook into topic and reply status changes

		add_action( 'wp_insert_post',                    array( $this, 'topic_update'              ), 10, 2 );

		add_action( 'wp_insert_post',                    array( $this, 'reply_update'              ), 10, 2 );

		// Hook into topic and reply deletion

		add_action( 'bbp_delete_topic',                  array( $this, 'topic_delete'              ), 10, 1 );

		add_action( 'bbp_delete_reply',                  array( $this, 'reply_delete'              ), 10, 1 );

		// Append forum filters in site wide activity streams

		add_action( 'bp_activity_filter_options',        array( $this, 'activity_filter_options'   ), 10    );

		// Append forum filters in single member activity streams

		add_action( 'bp_member_activity_filter_options', array( $this, 'activity_filter_options'   ), 10    );

		// Append forum filters in single group activity streams

		add_action( 'bp_group_activity_filter_options',  array( $this, 'activity_filter_options'   ), 10    );

	}

	/**

	 * Setup the filters

	 *

	 * @since bbPress (r3395)

	 * @access private

	 * @uses add_filter() To add various filters

	 * @uses add_action() To add various actions

	 */

	private function setup_filters() {

		/** Activity **********************************************************/

		// Obey BuddyPress commenting rules

		add_filter( 'bp_activity_can_comment',   array( $this, 'activity_can_comment'   )        );

		// Link directly to the topic or reply

		add_filter( 'bp_activity_get_permalink', array( $this, 'activity_get_permalink' ), 10, 2 );

		/** Mentions **********************************************************/

		// Convert mentions into links on create

		add_filter( 'bbp_new_topic_pre_content',  'bp_activity_at_name_filter' );

		add_filter( 'bbp_new_reply_pre_content',  'bp_activity_at_name_filter' );

		// Convert mentions into links on edit

		add_filter( 'bbp_edit_topic_pre_content', 'bp_activity_at_name_filter' );

		add_filter( 'bbp_edit_reply_pre_content', 'bp_activity_at_name_filter' );

		// Revert links into text on edit

		add_filter( 'bbp_get_form_topic_content', array( $this, 'strip_mentions_on_edit' ) );

		add_filter( 'bbp_get_form_reply_content', array( $this, 'strip_mentions_on_edit' ) );

	}

	/**

	 * Allow the variables, actions, and filters to be modified by third party

	 * plugins and themes.

	 *

	 * @since bbPress (r3902)

	 */

	private function fully_loaded() {

		do_action_ref_array( 'bbp_buddypress_activity_loaded', array( $this ) );

	}

	/** Methods ***************************************************************/

	/**

	 * Strip out BuddyPress activity at-name HTML on topic/reply edit

	 *

	 * Copied from bp_forums_strip_mentions_on_post_edit() in case forums

	 * component is not active or is not loaded in yet.

	 *

	 * @since bbPress (r3475)

	 * @param type $content Optional

	 * @uses bp_get_root_domain()

	 * @uses bp_get_members_root_slug()

	 * @return string

	 */

	public function strip_mentions_on_edit( $content = '' ) {

		// Backwards compat for members root slug

		if ( function_exists( 'bp_get_members_root_slug' ) ) {

			$members_root = bp_get_members_root_slug();

		} elseif ( defined( 'BP_MEMBERS_SLUG' ) ) {

			$members_root = BP_MEMBERS_SLUG;

		} else {

			$members_root = 'members';

		}

		$pattern = "|<a href=&#039;" . bp_get_root_domain() . "/" . $members_root . "/[A-Za-z0-9-_\.]+/&#039; rel=&#039;nofollow&#039;>(@[A-Za-z0-9-_\.@]+)</a>|";

		$content = preg_replace( $pattern, "$1", htmlspecialchars_decode( $content ) );

		return $content;

	}

	/**

	 * Register our activity actions with BuddyPress

	 *

	 * @since bbPress (r3395)

	 * @uses bp_activity_set_action()

	 */

	public function register_activity_actions() {

		bp_activity_set_action( $this->component, $this->topic_create, __( 'New topic created', 'bbpress' ) );

		bp_activity_set_action( $this->component, $this->reply_create, __( 'New reply created', 'bbpress' ) );

	}

	/**

	 * Wrapper for recoding bbPress actions to the BuddyPress activity stream

	 *

	 * @since bbPress (r3395)

	 * @param type $args Array of arguments for bp_activity_add()

	 * @uses bbp_get_current_user_id()

	 * @uses bp_core_current_time()

	 * @uses bbp_parse_args()

	 * @uses aplly_filters()

	 * @uses bp_activity_add()

	 * @return type Activity ID if successful, false if not

	 */

	private function record_activity( $args = '' ) {

		// Default activity args

			'id'                => null,

			'user_id'           => bbp_get_current_user_id(),

			'type'              => '',

			'action'            => '',

			'item_id'           => '',

			'secondary_item_id' => '',

			'content'           => '',

			'primary_link'      => '',

			'component'         => $this->component,

			'recorded_time'     => bp_core_current_time(),

			'hide_sitewide'     => false

		// Add the activity

		return bp_activity_add( $activity );

	}

	/**

	 * Wrapper for deleting bbPress actions from BuddyPress activity stream

	 *

	 * @since bbPress (r3395)

	 * @param type $args Array of arguments for bp_activity_add()

	 * @uses bbp_get_current_user_id()

	 * @uses bp_core_current_time()

	 * @uses bbp_parse_args()

	 * @uses aplly_filters()

	 * @uses bp_activity_add()

	 * @return type Activity ID if successful, false if not

	 */

	public function delete_activity( $args = '' ) {

		// Default activity args

		$defaults = array(

			'item_id'           => false,

			'component'         => $this->component,

			'type'              => false,

			'user_id'           => false,

			'secondary_item_id' => false

		);

		$activity = bbp_parse_args( $args, $defaults, 'delete_activity' );

		// Delete the activity

		bp_activity_delete_by_item_id( $activity );

	}

	/**

	 * Check for an existing activity stream entry for a given post_id

	 *

	 * @param int $post_id ID of the topic or reply

	 * @uses get_post_meta()

	 * @uses bp_activity_get_specific()

	 * @return int if an activity id is verified, false if not

	 */

	private static function get_activity_id( $post_id = 0 ) {

		// Try to get the activity ID of the post

		$activity_id = (int) get_post_meta( $post_id, '_bbp_activity_id', true );

		// Bail if no activity ID is in post meta

		if ( empty( $activity_id ) )

			return null;

		// Get the activity stream item, bail if it doesn't exist

		$existing = bp_activity_get_specific( array( 'activity_ids' => $activity_id, 'show_hidden' => true, 'spam' => 'all', ) );

		if ( empty( $existing['total'] ) || ( 1 != $existing['total'] ) )

			return null;

		// Return the activity ID since we've verified the connection

		return $activity_id;

	}

	/**

	 * Maybe disable activity stream comments on select actions

	 *

	 * @since bbPress (r3399)

	 * @global BP_Activity_Template $activities_template

	 * @param boolean $can_comment

	 * @uses bp_get_activity_action_name()

	 * @return boolean

	 */

	public function activity_can_comment( $can_comment = true ) {

		global $activities_template;

		// Already forced off, so comply

		if ( false === $can_comment )

			return $can_comment;

		// Check if blog & forum activity stream commenting is off

		if ( ( false === $activities_template->disable_blogforum_replies ) || (int) $activities_template->disable_blogforum_replies ) {

			// Get the current action name

			$action_name = bp_get_activity_action_name();

			// Setup the array of possibly disabled actions

			$disabled_actions = array(

				$this->topic_create,

				$this->reply_create

			);

			// Check if this activity stream action is disabled

			if ( in_array( $action_name, $disabled_actions ) ) {

				$can_comment = false;

			}

		}

		return $can_comment;

	}

	/**

	 * Maybe link directly to topics and replies in activity stream entries

	 *

	 * @since bbPress (r3399)

	 * @param string $link

	 * @param mixed $activity_object

	 * @return string The link to the activity stream item

	 */

	public function activity_get_permalink( $link = '', $activity_object = false ) {

		// Setup the array of actions to link directly to

		$disabled_actions = array(

			$this->topic_create,

			$this->reply_create

		);

		// Check if this activity stream action is directly linked

		if ( in_array( $activity_object->type, $disabled_actions ) ) {

			$link = $activity_object->primary_link;

		}

		return $link;

	}

	/**

	 * Append forum options to activity filter select box

	 *

	 * @since bbPress (r3653)

	 */

	function activity_filter_options() {

	?>

		<option value="<?php echo $this->topic_create; ?>"><?php _e( 'Topics',  'bbpress' ); ?></option>

		<option value="<?php echo $this->reply_create; ?>"><?php _e( 'Replies', 'bbpress' ); ?></option>

	<?php

	}

	/** Topics ****************************************************************/

	/**

	 * Record an activity stream entry when a topic is created or updated

	 *

	 * @since bbPress (r3395)

	 * @param int $topic_id

	 * @param int $forum_id

	 * @param array $anonymous_data

	 * @param int $topic_author_id

	 * @uses bbp_get_topic_id()

	 * @uses bbp_get_forum_id()

	 * @uses bbp_get_user_profile_link()

	 * @uses bbp_get_topic_permalink()

	 * @uses bbp_get_topic_title()

	 * @uses bbp_get_topic_content()

	 * @uses bbp_get_forum_permalink()

	 * @uses bbp_get_forum_title()

	 * @uses bp_create_excerpt()

	 * @uses apply_filters()

	 * @return Bail early if topic is by anonymous user

	 */

	public function topic_create( $topic_id, $forum_id, $anonymous_data, $topic_author_id ) {

		// Bail early if topic is by anonymous user

		if ( !empty( $anonymous_data ) )

			return;

		// Bail if site is private

		if ( !bbp_is_site_public() )

			return;

		// Validate activity data

		$user_id  = $topic_author_id;

		$topic_id = bbp_get_topic_id( $topic_id );

		$forum_id = bbp_get_forum_id( $forum_id );

		// Bail if user is not active

		if ( bbp_is_user_inactive( $user_id ) )

			return;

		// Bail if topic is not published

		if ( !bbp_is_topic_published( $topic_id ) )

			return;

		// User link for topic author

		$user_link  = bbp_get_user_profile_link( $user_id  );

		// Topic