<?php

/**
 * bbPress Core Functions
 *
 * @package bbPress
 * @subpackage Functions
 */

// Exit if accessed directly
defined( 'ABSPATH' ) || exit;

/** Versions ******************************************************************/

/**
 * Output the bbPress version
 *
 * @since 2.0.0 bbPress (r3468)
 */
function bbp_version() {
	echo bbp_get_version();
}
	/**
	 * Return the bbPress version
	 *
	 * @since 2.0.0 bbPress (r3468)
	 *
	 * @retrun string The bbPress version
	 */
	function bbp_get_version() {
		return bbpress()->version;
	}

/**
 * Output the bbPress database version
 *
 * @since 2.0.0 bbPress (r3468)
 */
function bbp_db_version() {
	echo bbp_get_db_version();
}
	/**
	 * Return the bbPress database version
	 *
	 * @since 2.0.0 bbPress (r3468)
	 *
	 * @retrun string The bbPress version
	 */
	function bbp_get_db_version() {
		return bbpress()->db_version;
	}

/**
 * Output the bbPress database version directly from the database
 *
 * @since 2.0.0 bbPress (r3468)
 */
function bbp_db_version_raw() {
	echo bbp_get_db_version_raw();
}
	/**
	 * Return the bbPress database version directly from the database
	 *
	 * @since 2.0.0 bbPress (r3468)
	 *
	 * @retrun string The current bbPress version
	 */
	function bbp_get_db_version_raw() {
		return get_option( '_bbp_db_version', '' );
	}

/** Post Meta *****************************************************************/

/**
 * Update the forum meta ID of a post
 *
 * @since 2.0.0 bbPress (r3181)
 *
 * @param int $post_id  The post to update
 * @param int $forum_id The forum
 */
function bbp_update_forum_id( $post_id = 0, $forum_id = 0 ) {

	// Allow the forum ID to be updated 'just in time' before save
	$forum_id = (int) apply_filters( 'bbp_update_forum_id', $forum_id, $post_id );

	// Update the post meta forum ID
	update_post_meta( $post_id, '_bbp_forum_id', $forum_id );

	return $forum_id;
}

/**
 * Update the topic meta ID of a post
 *
 * @since 2.0.0 bbPress (r3181)
 *
 * @param int $post_id  The post to update
 * @param int $topic_id The topic
 */
function bbp_update_topic_id( $post_id = 0, $topic_id = 0 ) {

	// Allow the topic ID to be updated 'just in time' before save
	$topic_id = (int) apply_filters( 'bbp_update_topic_id', $topic_id, $post_id );

	// Update the post meta topic ID
	update_post_meta( $post_id, '_bbp_topic_id', $topic_id );

	return $topic_id;
}

/**
 * Update the reply meta ID of a post
 *
 * @since 2.0.0 bbPress (r3181)
 *
 * @param int $post_id  The post to update
 * @param int $reply_id The reply
 */
function bbp_update_reply_id( $post_id = 0, $reply_id = 0 ) {

	// Allow the reply ID to be updated 'just in time' before save
	$reply_id = (int) apply_filters( 'bbp_update_reply_id', $reply_id, $post_id );

	// Update the post meta reply ID
	update_post_meta( $post_id, '_bbp_reply_id', $reply_id );

	return $reply_id;
}

/**
 * Update the reply-to meta ID of a post
 *
 * @since 2.6.0 bbPress (r5735)
 *
 * @param int $post_id  The post to update
 * @param int $reply_id The reply ID
 */
function bbp_update_reply_to_id( $post_id = 0, $reply_id = 0 ) {

	// Allow the reply ID to be updated 'just in time' before save
	$reply_id = (int) apply_filters( 'bbp_update_reply_to_id', $reply_id, $post_id );

	// Update the post meta reply ID
	update_post_meta( $post_id, '_bbp_reply_to', $reply_id );

	return $reply_id;
}

/** Views *********************************************************************/

/**
 * Get the registered views
 *
 * Does nothing much other than return the {@link $bbp->views} variable
 *
 * @since 2.0.0 bbPress (r2789)
 *
 * @return array Views
 */
function bbp_get_views() {
	return bbpress()->views;
}

/**
 * Register a bbPress view
 *
 * @since 2.0.0 bbPress (r2789)
 *
 * @param string $view View name
 * @param string $title View title
 * @param mixed $query_args {@link bbp_has_topics()} arguments.
 * @param bool $feed Have a feed for the view? Defaults to true.
 * @param string $capability Capability that the current user must have
 *
 * @return array The just registered (but processed) view
 */
function bbp_register_view( $view, $title, $query_args = '', $feed = true, $capability = '' ) {

	// Bail if user does not have capability
	if ( ! empty( $capability ) && ! current_user_can( $capability ) ) {
		return false;
	}

	$bbp   = bbpress();
	$view  = sanitize_title( $view );
	$title = esc_html( $title );

	if ( empty( $view ) || empty( $title ) ) {
		return false;
	}

	$query_args = bbp_parse_args( $query_args, '', 'register_view' );

	// Set show_stickies to false if it wasn't supplied
	if ( ! isset( $query_args['show_stickies'] ) ) {
		$query_args['show_stickies'] = false;
	}

	$bbp->views[ $view ] = array(
		'title'  => $title,
		'query'  => $query_args,
		'feed'   => $feed
	);

	return $bbp->views[ $view ];
}

/**
 * Deregister a bbPress view
 *
 * @since 2.0.0 bbPress (r2789)
 *
 * @param string $view View name
 * @return bool False if the view doesn't exist, true on success
 */
function bbp_deregister_view( $view ) {
	$bbp  = bbpress();
	$view = sanitize_title( $view );

	if ( ! isset( $bbp->views[ $view ] ) ) {
		return false;
	}

	unset( $bbp->views[ $view ] );

	return true;
}

/**
 * Run the query of a topic-view
 *
 * @since 2.0.0 bbPress (r2789)
 *
 * @param string $view Optional. View id
 * @param mixed $new_args New arguments. See {@link bbp_has_topics()}
 * @return bool False if the view doesn't exist, otherwise if topics are there
 */
function bbp_view_query( $view = '', $new_args = '' ) {

	// Get view, or bail
	$view = bbp_get_view_id( $view );
	if ( empty( $view ) ) {
		return false;
	}

	$query_args = bbp_get_view_query_args( $view );

	if ( ! empty( $new_args ) ) {
		$new_args   = bbp_parse_args( $new_args, '', 'view_query' );
		$query_args = array_merge( $query_args, $new_args );
	}

	return bbp_has_topics( $query_args );
}

/**
 * Return the query arguments of a topic-view
 *
 * @since 2.0.0 bbPress (r2789)
 *
 * @param string $view View name
 * @return array Query arguments
 */
function bbp_get_view_query_args( $view = '' ) {
	$bbp    = bbpress();
	$view   = bbp_get_view_id( $view );
	$retval = ! empty( $view ) && ! empty( $bbp->views[ $view ] )
		? $bbp->views[ $view ]['query']
		: array();

	// Filter & return
	return (array) apply_filters( 'bbp_get_view_query_args', $retval, $view );
}

/** Errors ********************************************************************/

/**
 * Adds an error message to later be output in the theme
 *
 * @since 2.0.0 bbPress (r3381)
 *
 * @see WP_Error()
 *
 * @param string $code Unique code for the error message
 * @param string $message Translated error message
 * @param string $data Any additional data passed with the error message
 */
function bbp_add_error( $code = '', $message = '', $data = '' ) {
	bbpress()->errors->add( $code, $message, $data );
}

/**
 * Check if error messages exist in queue
 *
 * @since 2.0.0 bbPress (r3381)
 *
 * @see WP_Error()
 */
function bbp_has_errors() {
	$has_errors = bbpress()->errors->get_error_codes()
		? true
		: false;

	return (bool) apply_filters( 'bbp_has_errors', $has_errors, bbpress()->errors );
}

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

/**
 * Set the pattern used for matching usernames for mentions.
 *
 * Moved into its own function to allow filtering of the regex pattern
 * anywhere mentions might be used.
 *
 * @since 2.4.0 bbPress (r4997)
 * @deprecated 2.6.0 bbp_make_clickable()
 *
 * @return string Pattern to match usernames with
 */
function bbp_find_mentions_pattern() {

	// Filter & return
	return apply_filters( 'bbp_find_mentions_pattern', '/[@]+([A-Za-z0-9-_\.@]+)\b/' );
}

/**
 * Searches through the content to locate usernames, designated by an @ sign.
 *
 * @since 2.2.0 bbPress (r4323)
 * @deprecated 2.6.0 bbp_make_clickable()
 *
 * @param string $content The content
 * @return bool|array $usernames Existing usernames. False if no matches.
 */
function bbp_find_mentions( $content = '' ) {
	$pattern   = bbp_find_mentions_pattern();
	preg_match_all( $pattern, $content, $usernames );
	$usernames = array_unique( array_filter( $usernames[1] ) );

	// Bail if no usernames
	if ( empty( $usernames ) ) {
		$usernames = false;
	}

	// Filter & return
	return apply_filters( 'bbp_find_mentions', $usernames, $pattern, $content );
}

/**
 * Finds and links @-mentioned users in the content
 *
 * @since 2.2.0 bbPress (r4323)
 * @deprecated 2.6.0 bbp_make_clickable()
 *
 * @return string $content Content filtered for mentions
 */
function bbp_mention_filter( $content = '' ) {

	// Get Usernames and bail if none exist
	$usernames = bbp_find_mentions( $content );
	if ( empty( $usernames ) ) {
		return $content;
	}

	// Loop through usernames and link to profiles
	foreach ( (array) $usernames as $username ) {

		// Skip if username does not exist or user is not active
		$user = get_user_by( 'slug', $username );
		if ( empty( $user->ID ) || bbp_is_user_inactive( $user->ID ) ) {
			continue;
		}

		// Link
		$profile_url  = bbp_get_user_profile_url( $user->ID );
		$profile_link = sprintf( '<a href="%1$s">@%2$s</a>', esc_url( $profile_url ), esc_html( $username ) );
		$no_followed  = bbp_rel_nofollow( $profile_link );
		$pattern      = "/(@{$username}\b)/";

		// Replace name in content
		$content = preg_replace( $pattern, $no_followed, $content );
	}

	// Return modified content
	return $content;
}

/** Post Statuses *************************************************************/

/**
 * Return the public post status ID
 *
 * @since 2.0.0 bbPress (r3504)
 *
 * @return string
 */
function bbp_get_public_status_id() {
	return bbpress()->public_status_id;
}

/**
 * Return the pending post status ID
 *
 * @since 2.1.0 bbPress (r3581)
 *
 * @return string
 */
function bbp_get_pending_status_id() {
	return bbpress()->pending_status_id;
}

/**
 * Return the private post status ID
 *
 * @since 2.0.0 bbPress (r3504)
 *
 * @return string
 */
function bbp_get_private_status_id() {
	return bbpress()->private_status_id;
}

/**
 * Return the hidden post status ID
 *
 * @since 2.0.0 bbPress (r3504)
 *
 * @return string
 */
function bbp_get_hidden_status_id() {
	return bbpress()->hidden_status_id;
}

/**
 * Return the closed post status ID
 *
 * @since 2.0.0 bbPress (r3504)
 *
 * @return string
 */
function bbp_get_closed_status_id() {
	return bbpress()->closed_status_id;
}

/**
 * Return the spam post status ID
 *
 * @since 2.0.0 bbPress (r3504)
 *
 * @return string
 */
function bbp_get_spam_status_id() {
	return bbpress()->spam_status_id;
}

/**
 * Return the trash post status ID
 *
 * @since 2.0.0 bbPress (r3504)
 *
 * @return string
 */
function bbp_get_trash_status_id() {
	return bbpress()->trash_status_id;
}

/**
 * Return the orphan post status ID
 *
 * @since 2.0.0 bbPress (r3504)
 *
 * @return string
 */
function bbp_get_orphan_status_id() {
	return bbpress()->orphan_status_id;
}

/** Rewrite IDs ***************************************************************/

/**
 * Return the unique ID for user profile rewrite rules
 *
 * @since 2.1.0 bbPress (r3762)
 *
 * @return string
 */
function bbp_get_user_rewrite_id() {
	return bbpress()->user_id;
}

/**
 * Return the unique ID for all edit rewrite rules (forum|topic|reply|tag|user)
 *
 * @since 2.1.0 bbPress (r3762)
 *
 * @return string
 */
function bbp_get_edit_rewrite_id() {
	return bbpress()->edit_id;
}

/**
 * Return the unique ID for all search rewrite rules
 *
 * @since 2.3.0 bbPress (r4579)
 *
 * @return string
 */
function bbp_get_search_rewrite_id() {
	return bbpress()->search_id;
}

/**
 * Return the unique ID for user topics rewrite rules
 *
 * @since 2.2.0 bbPress (r4321)
 *
 * @return string
 */
function bbp_get_user_topics_rewrite_id() {
	return bbpress()->tops_id;
}

/**
 * Return the unique ID for user replies rewrite rules
 *
 * @since 2.2.0 bbPress (r4321)
 *
 * @return string
 */
function bbp_get_user_replies_rewrite_id() {
	return bbpress()->reps_id;
}

/**
 * Return the unique ID for user favorites rewrite rules
 *
 * @since 2.2.0 bbPress (r4181)
 *
 * @return string
 */
function bbp_get_user_favorites_rewrite_id() {
	return bbpress()->favs_id;
}

/**
 * Return the unique ID for user subscriptions rewrite rules
 *
 * @since 2.2.0 bbPress (r4181)
 *
 * @return string
 */
function bbp_get_user_subscriptions_rewrite_id() {
	return bbpress()->subs_id;
}

/**
 * Return the unique ID for user engagement rewrite rules
 *
 * @since 2.6.0 bbPress (r6320)
 *
 * @return string
 */
function bbp_get_user_engagements_rewrite_id() {
	return bbpress()->engagements_id;
}

/**
 * Return the unique ID for topic view rewrite rules
 *
 * @since 2.1.0 bbPress (r3762)
 *
 * @return string
 */
function bbp_get_view_rewrite_id() {
	return bbpress()->view_id;
}

/** Rewrite Extras ************************************************************/

/**
 * Get the id used for paginated requests
 *
 * @since 2.4.0 bbPress (r4926)
 *
 * @return string
 */
function bbp_get_paged_rewrite_id() {
	return bbpress()->paged_id;
}

/**
 * Delete a blogs rewrite rules, so that they are automatically rebuilt on
 * the subsequent page load.
 *
 * @since 2.2.0 bbPress (r4198)
 */
function bbp_delete_rewrite_rules() {
	delete_option( 'rewrite_rules' );
}

/** Requests ******************************************************************/

/**
 * Return true|false if this is a POST request
 *
 * @since 2.3.0 bbPress (r4790)
 *
 * @return bool
 */
function bbp_is_post_request() {
	return (bool) ( 'POST' === strtoupper( $_SERVER['REQUEST_METHOD'] ) );
}

/**
 * Return true|false if this is a GET request
 *
 * @since 2.3.0 bbPress (r4790)
 *
 * @return bool
 */
function bbp_is_get_request() {
	return (bool) ( 'GET' === strtoupper( $_SERVER['REQUEST_METHOD'] ) );
}

/** Redirection ***************************************************************/

/**
 * Perform a safe, local redirect somewhere inside the current site
 *
 * On some setups, passing the value of wp_get_referer() may result in an empty
 * value for $location, which results in an error on redirection. If $location
 * is empty, we can safely redirect back to the forum root. This might change
 * in a future version, possibly to the site root.
 *
 * @since 2.6.0 bbPress (r5658)
 *
 * @see  bbp_redirect_to_field()
 *
 * @param string $location The URL to redirect the user to.
 * @param int    $status   Optional. The numeric code to give in the redirect
 *                         headers. Default: 302.
 */
function bbp_redirect( $location = '', $status = 302 ) {

	// Prevent errors from empty $location
	if ( empty( $location ) ) {
		$location = bbp_get_forums_url();
	}

	// Setup the safe redirect
	wp_safe_redirect( $location, $status );

	// Exit so the redirect takes place immediately
	exit();
}
