<?php

/**

 * bbPress BuddyPress Group Extension Class

 *

 * @package bbPress

 * @subpackage BuddyPress

 * @todo maybe move to BuddyPress Forums once bbPress 1.1 can be removed

 */

// Exit if accessed directly

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

if ( !class_exists( 'BBP_Forums_Group_Extension' ) && class_exists( 'BP_Group_Extension' ) ) :

/**

 * Loads Group Extension for Forums Component

 *

 * @since bbPress (r3552)

 *

 * @package bbPress

 * @subpackage BuddyPress

 * @todo Everything

 */

class BBP_Forums_Group_Extension extends BP_Group_Extension {

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

	/**

	 * Setup bbPress group extension variables

	 *

	 * @since bbPress (r3552)

	 */

	public function __construct() {

		// Name and slug

		$this->name          = __( 'Forum', 'bbpress' );

		$this->nav_item_name = __( 'Forum', 'bbpress' );

		$this->slug          = 'forum';

		$this->topic_slug    = 'topic';

		$this->reply_slug    = 'reply';

		// Forum component is visible

		$this->visibility = 'public';

		// Set positions towards end

		$this->create_step_position = 15;

		$this->nav_item_position    = 10;

		// Allow create step and show in nav

		$this->enable_create_step   = true;

		$this->enable_nav_item      = true;

		$this->enable_edit_item     = true;

		// Template file to load, and action to hook display on to

		$this->template_file        = 'groups/single/plugins';

		$this->display_hook         = 'bp_template_content';

		// Add handlers to bp_actions

		add_action( 'bp_actions', 'bbp_new_forum_handler'  );

		add_action( 'bp_actions', 'bbp_new_topic_handler'  );

		add_action( 'bp_actions', 'bbp_new_reply_handler'  );

		add_action( 'bp_actions', 'bbp_edit_forum_handler' );

		add_action( 'bp_actions', 'bbp_edit_topic_handler' );

		add_action( 'bp_actions', 'bbp_edit_reply_handler' );

		// Possibly redirect

		add_action( 'bbp_template_redirect',     array( $this, 'redirect_canonical' ) );

		// Group forum pagination

		add_filter( 'bbp_topic_pagination',      array( $this, 'topic_pagination'   ) );

		add_filter( 'bbp_replies_pagination',    array( $this, 'replies_pagination' ) );

		// Tweak the redirect field

		add_filter( 'bbp_new_topic_redirect_to', array( $this, 'new_topic_redirect_to'        ), 10, 3 );

		add_filter( 'bbp_new_reply_redirect_to', array( $this, 'new_reply_redirect_to'        ), 10, 3 );

		// Map forum/topic/replys permalinks to their groups

		add_filter( 'bbp_get_forum_permalink',   array( $this, 'map_forum_permalink_to_group' ), 10, 2 );

		add_filter( 'bbp_get_topic_permalink',   array( $this, 'map_topic_permalink_to_group' ), 10, 2 );

		add_filter( 'bbp_get_reply_permalink',   array( $this, 'map_reply_permalink_to_group' ), 10, 2 );

		// Map reply edit links to their groups

		add_filter( 'bbp_get_reply_edit_url',    array( $this, 'map_reply_edit_url_to_group'  ), 10, 2 );

		// Map assorted template function permalinks

		add_filter( 'post_link',                 array( $this, 'post_link'                    ), 10, 2 );

		add_filter( 'page_link',                 array( $this, 'page_link'                    ), 10, 2 );

		add_filter( 'post_type_link',            array( $this, 'post_type_link'               ), 10, 2 );

		// Allow group member to view private/hidden forums

		add_filter( 'bbp_map_topic_meta_caps',   array( $this, 'map_topic_meta_caps'          ), 10, 4 );

		add_filter( 'bbp_map_reply_meta_caps',   array( $this, 'map_topic_meta_caps'          ), 10, 4 );

		// Remove topic cap map when view is done

		add_action( 'bbp_after_group_forum_display', array( $this, 'remove_topic_meta_cap_map' ) );

		// Map group forum activity items to groups

		add_filter( 'bbp_before_record_activity_parse_args', array( $this, 'map_activity_to_group' ) );

		// No subforums yet, so suppress them for now

		add_filter( 'bbp_get_forum_subforum_count_int', array( $this, 'no_subforums_yet' ) );

	}

	/**

	 * The primary display function for group forums

	 */

	public function display() {

		// Prevent Topic Parent from appearing

		add_action( 'bbp_theme_before_topic_form_forum', array( $this, 'ob_start'     ) );

		add_action( 'bbp_theme_after_topic_form_forum',  array( $this, 'ob_end_clean' ) );

		add_action( 'bbp_theme_after_topic_form_forum',  array( $this, 'topic_parent' ) );

		// Prevent Forum Parent from appearing

		add_action( 'bbp_theme_before_forum_form_parent', array( $this, 'ob_start'     ) );

		add_action( 'bbp_theme_after_forum_form_parent',  array( $this, 'ob_end_clean' ) );

		add_action( 'bbp_theme_after_forum_form_parent',  array( $this, 'forum_parent' ) );

		// Hide breadcrumb

		add_filter( 'bbp_no_breadcrumb', '__return_true' );

		$this->display_forums( 0 );

	}

	/**

	 * Allow group members to have advanced priviledges in group forum topics.

	 *

	 * @since bbPress (r4434)

	 *

	 * @param array $caps

	 * @param string $cap

	 * @param int $user_id

	 * @param array $args

	 * @return array

	 */

	public function map_topic_meta_caps( $caps = array(), $cap = '', $user_id = 0, $args = array() ) {

		// Bail if not viewing a single topic

		if ( ! bp_is_single_item() || ! bp_is_groups_component() || ! bp_is_current_action( 'forum' ) || ! bp_is_action_variable( 0, 'topic' ) )

			return $caps;

		switch ( $cap ) {

			// If user is a group mmember, allow them to create content.

			case 'read_forum'          :

			case 'publish_replies'     :

			case 'publish_topics'      :

			case 'read_hidden_forums'  :

			case 'read_private_forums' :

				if ( bp_group_is_member() ) {

					$caps = array( 'participate' );

				}

				break;

			// If user is a group mod ar admin, map to participate cap.

			case 'moderate'     :

			case 'edit_topic'   :

			case 'edit_reply'   :

			case 'view_trash'   :

			case 'edit_others_replies' :

			case 'edit_others_topics'  :

				if ( bp_group_is_mod() || bp_group_is_admin() ) {

					$caps = array( 'participate' );

				}

				break;

			// If user is a group admin, allow them to delete topics and replies.

			case 'delete_topic' :

			case 'delete_reply' :

				if ( bp_group_is_admin() ) {

					$caps = array( 'participate' );

				}

				break;

		}

		return apply_filters( 'bbp_map_group_forum_topic_meta_caps', $caps, $cap, $user_id, $args );

	}

	/**

	 * Remove the topic meta cap map, so it doesn't interfere with sidebars.

	 *

	 * @since bbPress (r4434)

	 */

	public function remove_topic_meta_cap_map() {

		remove_filter( 'bbp_map_topic_meta_caps', array( $this, 'map_topic_meta_caps' ), 10, 4 );

		remove_filter( 'bbp_map_reply_meta_caps', array( $this, 'map_topic_meta_caps' ), 10, 4 );

	}

	/** Edit ******************************************************************/

	/**

	 * Show forums and new forum form when editing a group

	 *

	 * @since bbPress (r3563)

	 * @uses bbp_get_template_part()

	 */

	public function edit_screen() {

		$checked = bp_get_new_group_enable_forum() || bp_group_is_forum_enabled( bp_get_group_id() ); ?>

		<h4><?php _e( 'Enable Group Forum', 'bbpress' ); ?></h4>

		<p><?php _e( 'Create a discussion forum to allow members of this group to communicate in a structured, bulletin-board style fashion.', 'bbpress' ); ?></p>

		<div class="checkbox">

			<label><input type="checkbox" name="bbp-edit-group-forum" id="bbp-edit-group-forum" value="1"<?php checked( $checked ); ?> /> <?php _e( 'Yes. I want this group to have a forum.', 'bbpress' ); ?></label>

		</div>

		<p class="description"><?php _e( 'Saying no will not delete existing forum content.', 'bbpress' ); ?></p>

		<input type="submit" value="<?php esc_attr_e( 'Save Settings', 'bbpress' ); ?>" />

		<?php

		// Verify intent

		wp_nonce_field( 'groups_edit_save_' . $this->slug );

	}

	/**

	 * Save the Group Forum data on edit

	 *

	 * @since bbPress (r3465)

	 * @uses bbp_new_forum_handler() To check for forum creation

	 * @uses bbp_edit_forum_handler() To check for forum edit

	 */

	public function edit_screen_save() {

		// Bail if not a POST action

		if ( 'POST' !== strtoupper( $_SERVER['REQUEST_METHOD'] ) )

			return;

		check_admin_referer( 'groups_edit_save_' . $this->slug );

		$edit_forum   = !empty( $_POST['bbp-edit-group-forum'] ) ? true : false;

		$forum_id     = 0;

		$group_id     = bp_get_current_group_id();

		$forum_ids    = bbp_get_group_forum_ids( $group_id );

		if ( !empty( $forum_ids ) )

			$forum_id = (int) is_array( $forum_ids ) ? $forum_ids[0] : $forum_ids;

		// Update the group forum setting

		$group               = new BP_Groups_Group( $group_id );

		$group->enable_forum = $edit_forum;

		$group->save();

		// Redirect after save

		bp_core_redirect( trailingslashit( bp_get_group_permalink( buddypress()->groups->current_group ) . '/admin/' . $this->slug ) );

	}

	/** Create ****************************************************************/

	/**

	 * Show forums and new forum form when creating a group

	 *

	 * @since bbPress (r3465)

	 */

	public function create_screen() {

		// Bail if not looking at this screen

		if ( !bp_is_group_creation_step( $this->slug ) )

			return false;

		$checked = bp_get_new_group_enable_forum() || groups_get_groupmeta( bp_get_new_group_id(), 'forum_id' ); ?>

		<h4><?php _e( 'Group Forum', 'bbpress' ); ?></h4>

		<p><?php _e( 'Create a discussion forum to allow members of this group to communicate in a structured, bulletin-board style fashion.', 'bbpress' ); ?></p>

		<div class="checkbox">

			<label><input type="checkbox" name="bbp-create-group-forum" id="bbp-create-group-forum" value="1"<?php checked( $checked ); ?> /> <?php _e( 'Yes. I want this group to have a forum.', 'bbpress' ); ?></label>

		</div>

		<?php

		// Verify intent

		wp_nonce_field( 'groups_create_save_' . $this->slug );

	}

	/**

	 * Save the Group Forum data on create

	 *

	 * @since bbPress (r3465)

	 */

	public function create_screen_save() {

		check_admin_referer( 'groups_create_save_' . $this->slug );

		$create_forum = !empty( $_POST['bbp-create-group-forum'] ) ? true : false;

		$forum_id     = 0;

		$forum_ids    = bbp_get_group_forum_ids( bp_get_new_group_id() );

		if ( !empty( $forum_ids ) )

			$forum_id = (int) is_array( $forum_ids ) ? $forum_ids[0] : $forum_ids;

		// Create a forum, or not

		switch ( $create_forum ) {

			case true  :

				// Bail if initial content was already created

				if ( !empty( $forum_id ) )

					return;

				// Set the default forum status

				switch ( bp_get_new_group_status() ) {

					case 'hidden'  :

						$status = bbp_get_hidden_status_id();

						break;

					case 'private' :

						$status = bbp_get_private_status_id();

						break;

					case 'public'  :

					default        :

						$status = bbp_get_public_status_id();

						break;

				}

				// Create the initial forum

				$forum_id = bbp_insert_forum( array(

					'post_parent'  => bbp_get_group_forums_root_id(),

					'post_title'   => bp_get_new_group_name(),

					'post_content' => bp_get_new_group_description(),

					'post_status'  => $status

				) );

				// Run the BP-specific functions for new groups

				$this->new_forum( array( 'forum_id' => $forum_id ) );

				// Update forum active

				groups_update_groupmeta( bp_get_new_group_id(), '_bbp_forum_enabled_' . $forum_id, true );

				break;

			case false :

				// Forum was created but is now being undone

				if ( !empty( $forum_id ) ) {

					wp_delete_post( $forum_id, true );

					groups_delete_groupmeta( bp_get_new_group_id(), 'forum_id' );

					groups_delete_groupmeta( bp_get_new_group_id(), '_bbp_forum_enabled_' . $forum_id );

				}

				break;

		}

	}

	/**

	 * Used to start an output buffer

	 */

	public function ob_start() {

		ob_start();

	}

	/**

	 * Used to end an output buffer

	 */

	public function ob_end_clean() {

		ob_end_clean();

	}

	/**

	 * Creating a group forum or category (including root for group)

	 *

	 * @since bbPress (r3653)

	 * @param type $forum_args

	 * @uses bbp_get_forum_id()

	 * @uses bp_get_current_group_id()

	 * @uses bbp_add_forum_id_to_group()

	 * @uses bbp_add_group_id_to_forum()

	 * @return if no forum_id is available

	 */

	public function new_forum( $forum_args = array() ) {

		// Bail if no forum_id was passed

		if ( empty( $forum_args['forum_id'] ) )

			return;

		// Validate forum_id

		$forum_id = bbp_get_forum_id( $forum_args['forum_id'] );

		$group_id = bp_get_current_group_id();

		bbp_add_forum_id_to_group( $group_id, $forum_id );

		bbp_add_group_id_to_forum( $forum_id, $group_id );

	}

	/**

	 * Removing a group forum or category (including root for group)

	 *

	 * @since bbPress (r3653)

	 * @param type $forum_args

	 * @uses bbp_get_forum_id()

	 * @uses bp_get_current_group_id()

	 * @uses bbp_add_forum_id_to_group()

	 * @uses bbp_add_group_id_to_forum()

	 * @return if no forum_id is available

	 */

	public function remove_forum( $forum_args = array() ) {

		// Bail if no forum_id was passed

		if ( empty( $forum_args['forum_id'] ) )

			return;

		// Validate forum_id

		$forum_id = bbp_get_forum_id( $forum_args['forum_id'] );

		$group_id = bp_get_current_group_id();

		bbp_remove_forum_id_from_group( $group_id, $forum_id );

		bbp_remove_group_id_from_forum( $forum_id, $group_id );

	}

	/** Display Methods *******************************************************/

	/**

	 * Output the forums for a group in the edit screens

	 *

	 * @since bbPress (r3653)

	 * @uses bp_get_current_group_id()

	 * @uses bbp_get_group_forum_ids()

	 * @uses bbp_has_forums()

	 * @uses bbp_get_template_part()

	 */

	public function display_forums( $offset = 0 ) {

		// Allow actions immediately before group forum output

		do_action( 'bbp_before_group_forum_display' );

		// Load up bbPress once

		$bbp = bbpress();

		// Forum data

		$forum_ids  = bbp_get_group_forum_ids( bp_get_current_group_id() );

		$forum_args = array( 'post__in' => $forum_ids, 'post_parent' => null );

		// Unset global queries

		$bbp->forum_query = new stdClass;

		$bbp->topic_query = new stdClass;