<?php

require_once 'db_interface.php';
require_once 'db_handler/post.php';

class PostHandler {
    private $db;
    private $posts;

    public $markdown_engine;

    public $site_defaults;

    function __construct($db_adapter) {
        $this->db = $db_adapter;
        $this->posts = [];

        $this->site_defaults = null;

        $this->markdown_engine = null;
    }

    public function get_post($key) {
        $key = sanitize_post_path($key);

        if(isset($this->posts[$key])) {
            return $this->posts[$key];
        }

        $post_data = $this->db->get_postdata($key);
        $post = null;
        if(isset($post_data)) {
            $post = new Post($this, $post_data, $this->site_defaults);
        }

        $this->posts[$key] = $post;

        return $post;
    }

    public function get_markdown_for($post) {
        return $this->db->get_post_markdown($post->id);
    }

    public function render_post($post) {
        return ($this->markdown_engine)($post);
    }

    public function increment_post_counter(...$opts) {
        $this->db->increment_post_counter(...$opts);
    }

    public function get_children_for($post, ...$search_opts) {        
        $child_list = $this->db->get_post_children($post->path, ...$search_opts);

        $out_list = [];
        foreach($child_list as $child_data) {
            array_push($out_list, new Post($this, $child_data, $this->site_defaults));
        }

        return $out_list;
    }

    public function search_posts($search_query) {
        $search_results = $this->db->search_posts($search_query);

        $out_list = [];
        foreach($search_results as $search_result) {
            array_push($out_list, new Post($this, $search_result, $this->site_defaults));
        }

        return $out_list;
    }
}

?>