la til pluginer
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Øyvind Bakkeli committed
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<?php
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/**
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* Register a connection between two post types.
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* This creates the appropriate meta box in the admin edit screen
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*
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* @param array $args Can be:
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* - 'from' string The first end of the connection.
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* - 'to' string The second end of the connection.
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* - 'fields' array Additional metadata fields (optional).
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* - 'prevent_duplicates' bool Wether to disallow duplicate connections between the same two posts. Default: true.
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* - 'reciprocal' bool Wether to show the box on both sides of the connection. Default: false.
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* - 'title' string The box's title. Default: 'Connected {$post_type}s'
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* - 'context' string Where should the box show up by default. Possible values: 'advanced' or 'side'
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* - 'box' string A class that handles displaying and saving connections. Default: P2P_Box_Multiple
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*/
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function p2p_register_connection_type( $args ) {
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$argv = func_get_args();
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if ( count( $argv ) > 1 ) {
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$args = array();
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@list( $args['from'], $args['to'], $args['reciprocal'] ) = $argv;
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}
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$defaults = array(
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'from' => '',
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'to' => '',
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'fields' => array(),
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'prevent_duplicates' => true,
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'reciprocal' => false,
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'title' => '',
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'context' => 'side',
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'box' => 'P2P_Box_Multiple',
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);
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$args = wp_parse_args( $args, $defaults );
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P2P_Connection_Types::register( $args );
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}
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/**
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* Connect a post to one or more other posts.
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*
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* @param int|array $from The first end of the connection
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* @param int|array $to The second end of the connection
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* @param array $data additional data about the connection
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*/
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function p2p_connect( $from, $to, $data = array() ) {
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foreach ( (array) $from as $from ) {
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foreach ( (array) $to as $to ) {
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P2P_Connections::connect( $from, $to, $data );
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}
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}
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}
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/**
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* Disconnect a post from or more other posts.
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*
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* @param int|array $from The first end of the connection
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* @param int|array|string $to The second end of the connection
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* @param array $data additional data about the connection to filter against
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*/
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function p2p_disconnect( $from, $to, $data = array() ) {
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foreach ( (array) $from as $from ) {
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foreach ( (array) $to as $to ) {
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P2P_Connections::disconnect( $from, $to, $data );
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}
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}
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}
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/**
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* Get a list of connected posts.
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*
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* Low-level function. Use new WP_Query( array( 'connected' => $post_id ) ) instead.
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*
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* @param int $post_id One end of the connection
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* @param string $direction The direction of the connection. Can be 'to', 'from' or 'any'
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* @param array $data additional data about the connection to filter against
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*
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* @return array( p2p_id => post_id )
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*/
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function p2p_get_connected( $post_id, $direction = 'any', $data = array() ) {
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return P2P_Connections::get( $post_id, $direction, $data );
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}
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/**
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* See if a certain post is connected to another one
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*
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* @param int $from The first end of the connection
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* @param int $to The second end of the connection
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* @param array $data additional data about the connection to filter against
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*
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* @return bool True if the connection exists, false otherwise
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*/
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function p2p_is_connected( $from, $to, $data = array() ) {
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$ids = p2p_get_connected( $from, $to, $data );
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return !empty( $ids );
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}
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/**
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* Delete one or more connections
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*
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* @param int|array $p2p_id Connection ids
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*
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* @return int Number of connections deleted
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*/
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function p2p_delete_connection( $p2p_id ) {
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return P2P_Connections::delete( $p2p_id );
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}
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/**
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* Optimized inner query, after the outer query was executed.
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*
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* Populates each of the outer querie's $post objects with a property containing a list of connected posts
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*
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* @param string $direction The direction of the connection. Can be 'to', 'from' or 'any'
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* @param string $prop_name The property name; will be prefixed with 'connected_'
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* @param string|array $args The query vars for the inner query
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* @param object $query (optional) The outer query. Defaults to the global $wp_query
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*/
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function p2p_each_connected( $direction, $prop_name, $search, $query = null ) {
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if ( is_null( $query ) )
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$query = $GLOBALS['wp_query'];
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if ( empty( $query->posts ) )
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return;
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if ( empty( $prop_name ) )
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$prop_name = 'connected';
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else
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$prop_name = 'connected_' . $prop_name;
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// re-index by ID
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$posts = array();
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foreach ( $query->posts as $post ) {
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$post->$prop_name = array();
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$posts[ $post->ID ] = $post;
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}
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// ignore other 'connected' query vars for the inner query
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foreach ( array_keys( P2P_Query::$qv_map ) as $qv )
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unset( $search[ $qv ] );
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if ( 'any' == $direction )
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$key = 'connected';
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else
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$key = 'connected_' . $direction;
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$search[ $key ] = array_keys( $posts );
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$search[ 'suppress_filters' ] = false;
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foreach ( get_posts( $search ) as $inner_post ) {
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if ( $inner_post->ID == $inner_post->p2p_from )
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$outer_post_id = $inner_post->p2p_to;
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elseif ( $inner_post->ID == $inner_post->p2p_to )
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$outer_post_id = $inner_post->p2p_from;
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else
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throw new Exception( 'Corrupted data.' );
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if ( $outer_post_id == $inner_post->ID )
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throw new Exception( 'Post connected to itself.' );
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array_push( $posts[ $outer_post_id ]->$prop_name, $inner_post );
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}
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}
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// Allows you to write query_posts( array( 'connected' => 123 ) );
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class P2P_Query {
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static $qv_map = array(
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'connected' => 'any',
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'connected_to' => 'to',
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'connected_from' => 'from',
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);
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function init() {
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new scbQueryManipulation( array( __CLASS__, 'query' ), false ); // 'posts_clauses'
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add_filter( 'the_posts', array( __CLASS__, 'the_posts' ), 11, 2 );
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}
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function query( $clauses, $wp_query ) {
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global $wpdb;
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$found = self::find_qv( $wp_query );
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if ( !$found )
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return $clauses;
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list( $search, $key, $direction ) = $found;
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$clauses['fields'] .= ", $wpdb->p2p.*";
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$clauses['join'] .= " INNER JOIN $wpdb->p2p";
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if ( 'any' == $search ) {
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$search = false;
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} else {
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$search = implode( ',', array_map( 'absint', (array) $search ) );
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}
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switch ( $direction ) {
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case 'from':
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$clauses['where'] .= " AND $wpdb->posts.ID = $wpdb->p2p.p2p_to";
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if ( $search ) {
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$clauses['where'] .= " AND $wpdb->p2p.p2p_from IN ($search)";
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}
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break;
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case 'to':
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$clauses['where'] .= " AND $wpdb->posts.ID = $wpdb->p2p.p2p_from";
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if ( $search ) {
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$clauses['where'] .= " AND $wpdb->p2p.p2p_to IN ($search)";
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}
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break;
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case 'any':
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if ( $search ) {
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$clauses['where'] .= " AND (
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($wpdb->posts.ID = $wpdb->p2p.p2p_to AND $wpdb->p2p.p2p_from IN ($search) ) OR
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($wpdb->posts.ID = $wpdb->p2p.p2p_from AND $wpdb->p2p.p2p_to IN ($search) )
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)";
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} else {
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$clauses['where'] .= " AND ($wpdb->posts.ID = $wpdb->p2p.p2p_to OR $wpdb->posts.ID = $wpdb->p2p.p2p_from)";
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}
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break;
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}
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$connected_meta = $wp_query->get( 'connected_meta' );
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if ( !empty( $connected_meta ) ) {
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$meta_clauses = _p2p_meta_sql_helper( $connected_meta );
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foreach ( $meta_clauses as $key => $value ) {
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$clauses[ $key ] .= $value;
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}
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}
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return $clauses;
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}
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function the_posts( $the_posts, $wp_query ) {
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if ( empty( $the_posts ) )
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return $the_posts;
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$found = self::find_qv( $wp_query, 'each_' );
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if ( !$found )
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return $the_posts;
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list( $search, $qv, $direction ) = $found;
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$qv = explode('_', $qv);
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$key = isset( $qv[1] ) ? $qv[1] : '';
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p2p_each_connected( $direction, $key, $search, $wp_query );
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return $the_posts;
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}
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private function find_qv( $wp_query, $prefix = '' ) {
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foreach ( self::$qv_map as $qv => $direction ) {
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$search = $wp_query->get( $prefix . $qv );
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if ( !empty( $search ) )
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break;
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}
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if ( empty( $search ) )
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return false;
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return array( $search, $qv, $direction );
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}
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}
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