<?php

if ( !class_exists( 'Anthologize_Ajax_Handlers' ) ) :

    require_once('class-project-organizer.php');

class Anthologize_Ajax_Handlers {

    var $project_organizer = null;

    function anthologize_ajax_handlers() {
        add_action( 'wp_ajax_get_filterby_terms', array( $this, 'get_filterby_terms' ) );
        add_action( 'wp_ajax_get_posts_by', array( $this, 'get_posts_by' ) );
        add_action( 'wp_ajax_place_item', array( $this, 'place_item' ) );
        add_action( 'wp_ajax_place_items', array( $this, 'place_items' ) );
        add_action( 'wp_ajax_merge_items', array( $this, 'merge_items' ) );
        add_action( 'wp_ajax_get_project_meta', array( $this, 'fetch_project_meta' ) );
    }

    function __construct() {
        $this->anthologize_ajax_handlers();
        $project_id = ( isset( $_POST['project_id'] ) ) ? $_POST['project_id'] : 0;
                
        $this->project_organizer = new Anthologize_Project_Organizer($project_id);
       
    }

    function fetch_tags() {
        $tags = get_tags();

        $the_tags = Array();
        foreach( $tags as $tag ) {
            $the_tags[$tag->slug] = $tag->name;
        }

        print(json_encode($the_tags));
        die();
    }

    function fetch_cats() {
        $cats = get_categories();

        $the_cats = Array();
        foreach( $cats as $cat ) {
            $the_cats[$cat->term_id] = $cat->name;
        }

        print(json_encode($the_cats));
        die();
    }

	function get_filterby_terms() {
		$filtertype = $_POST['filtertype'];
		
		$terms = array();
		
		switch ( $filtertype ) {
			case 'category' :
				$cats = get_categories();
				foreach( $cats as $cat ) {
					$terms[$cat->term_id] = $cat->name;
				}
				break;
			
			case 'tag' :
				$tags = get_tags();
				foreach( $tags as $tag ) {
					$terms[$tag->slug] = $tag->name;
				}
				break;
			
			case 'post_type' :
				$terms = $this->project_organizer->available_post_types();
				break;
		}
				
		$terms = apply_filters( 'anth_get_posts_by', $terms, $filtertype );
		
		print( json_encode( $terms ) );
		die();
	}

    function get_posts_by() {
		$filterby = $_POST['filterby'];

		$args = array(
			'post_type' => array('post', 'page', 'anth_imported_item' ),
			'posts_per_page' => -1,
			'orderby' => 'post_date',
			'order' => 'DESC'
		);

		switch ( $filterby ) {
			case 'date' :
				$startdate = mysql_real_escape_string($_POST['startdate']);
				$enddate = mysql_real_escape_string($_POST['enddate']);				
								
				$date_range_where = '';
				if (strlen($startdate) > 0){
				$date_range_where = " AND post_date >= '".$startdate."'";
				}
				if (strlen($enddate) > 0){
				$date_range_where .= " AND post_date <= '".$enddate."'";
				}

				$where_func = '$where .= "'.$date_range_where.'"; return $where;'; 
				$filter_where = create_function('$where', $where_func);
				add_filter('posts_where', $filter_where);

				break;
			
			case 'tag' :
				$args['tag'] = $_POST['term'];
				break;
			
			case 'category' :
				$args['cat'] = $_POST['term'];
				break;
			
			case 'post_type' :
				$args['post_type'] = $_POST['term'];
				break;
		}

		// Allow plugins to modify the query_post arguments
		$posts = new WP_Query( apply_filters( 'anth_get_posts_by_query', $args, $filterby ) );
		
		$the_posts = Array();
		while ( $posts->have_posts() ) {
			$posts->the_post();
			$the_posts[get_the_ID()] = get_the_title();
		}
		if ($filterby == 'date'){
			remove_filter('posts_where', $filter_where);
		}
		
		$the_posts = apply_filters( 'anth_get_posts_by', $the_posts, $filterby );
		
		print(json_encode($the_posts));

		die();
	}

    function place_item() {
        $project_id = $_POST['project_id'];
        $post_id = $_POST['post_id'];
        $dest_part_id = $_POST['dest_id'];
        $dest_seq = stripslashes($_POST['dest_seq']);
        $dest_seq_array = json_decode($dest_seq, $assoc=true);
        if ( NULL === $dest_seq_array ) {
            header('HTTP/1.1 500 Internal Server Error');
            die();
        }
        
        if ('true' === $_POST['new_post']) {
            $new_item = true;
            $src_part_id = false;
            $src_seq_array = false;
        } else {
            $new_item = false;
            $src_part_id = $_POST['src_id'];
            $src_seq = stripslashes($_POST['src_seq']);
            $src_seq_array = json_decode($src_seq, $assoc=true);
            if ( NULL === $src_seq_array ) {
                header('HTTP/1.1 500 Internal Server Error');
                die();
            }
        }

        $insert_result = $this->project_organizer->insert_item($project_id, $post_id, $new_item, $dest_part_id, $src_part_id, $dest_seq_array, $src_seq_array);

        if (false === $insert_result) {
            header('HTTP/1.1 500 Internal Server Error');
            die();
        } else {
						if (true == $new_item){
      				$dest_seq_array[$insert_result] = $dest_seq_array['new_new_new'];
      				unset($dest_seq_array['new_new_new']);
						}
						$this->project_organizer->rearrange_items($dest_seq_array);
            print "{\"post_id\":\"$insert_result\"}";
        }

        die();
    }

		function place_items() {
			$project_id = $_POST['project_id'];

			$post_ids = $_POST['post_ids'];
			$post_ids = stripslashes($_POST['post_ids']);
 			$post_ids_array = json_decode($post_ids, $assoc=true);

			$dest_part_id = $_POST['dest_id'];
			$dest_seq = stripslashes($_POST['dest_seq']);
 			$dest_seq_array = json_decode($dest_seq, $assoc=true);
			if ( NULL === $dest_seq_array ) {
				header('HTTP/1.1 500 Internal Server Error');
				die();
			}
        

			$new_item = true;
			$src_part_id = false;
			$src_seq_array = false;

			$ret_ids = array();
			foreach ($post_ids_array as $position => $post_id){
				$post_id = str_replace("added-", "", $post_id);
				$insert_result = $this->project_organizer->insert_item($project_id, $post_id, $new_item, $dest_part_id, $src_part_id, $dest_seq_array, $src_seq_array);
				if (false === $insert_result) {
					header('HTTP/1.1 500 Internal Server Error');
					die();
				}else{
					$ret_ids[$post_id] = $insert_result;
			    $dest_seq_array[$insert_result] = $dest_seq_array[$post_id];
      		unset($dest_seq_array[$post_id]);
				}
			}
			$this->project_organizer->rearrange_items($dest_seq_array);
			
			print json_encode(array("post_ids" => $ret_ids));
			die();
    }

    function merge_items() {
        $project_id = $_POST['project_id'];
        $post_id = $_POST['post_id'];

        if (is_array($_POST['child_post_ids'])) {
            $child_post_ids = $_POST['child_post_ids'];
        } else {
            $child_post_ids = Array($_POST['child_post_ids']);
        }

        $new_seq = stripslashes($_POST['new_seq']);

        $new_seq_array = json_decode($new_seq, $assoc=true);
        if ( NULL === $new_seq_array ) {
            header('HTTP/1.1 500 Internal Server Error');
            die();
        }

        $append_result = $this->project_organizer->append_children($post_id, $child_post_ids);

        if (false === $append_result) {
            header('HTTP/1.1 500 Internal Server Error');
            die();
        }

        $reseq_result = $this->project_organizer->rearrange_items($new_seq_array);

        // TODO: What to do? If the merge succeeded but the resort failed, ugh...
        /*if (false === $reseq_result) {
        }*/

        die();
    }

    function fetch_project_meta() {
		$result = '';
		$project_id = $_POST['proj_id'];

		if ( $options = get_post_meta( $project_id, 'anthologize_meta', true ) )
			$result = json_encode( $options );
		else
			$result = json_encode( 'none' );

    	print(json_encode( $result ));

    	die();

    }

}

endif;

?>