<?php
    /**
     * Guild skill group entity file.
     *
     * Creates the entity and makes it available.
     *
     * @category Entity
     */

    /**
     * Require dependent entities if not present.
     */
    require_once(PATH::ENTITY . "Entity.php");
    require_once(PATH::ENTITY . "Guild_Skill.php");

    /**
     * Guild skill group.
     *
     * Represents an object from the table 'guild_skill_group'.
     *
     * @category Entity
     */
    class Guild_Skill_Group extends Entity{

        private $id;
        private $name;
        private $description;
        private $flag_skills = false;
        private $skills = [];

        /**
         * Retrieves the identifier of the skill group.
         *
         * @return int Group ID
         */
        public function get_id(){
            return $this->id;
        }
    
        /**
         * Retrieves the name of the skill_group.
         *
         * @return string Group name.
         */
        public function get_name(){
            return $this->name;
        }
    
        /**
         * Retrieves the description of the skill group.
         *
         * @return string Group description.
         */
        public function get_description(){
            return $this->description;
        }
    
        /**
         * Retrieves the skills in the group.
         *
         * @return Guild_Skill[] Skills in the group.
         */
        public function get_skills(){
            if (! $this->flag_skills){
                $this->load_skills();
            }
            return $this->skills;
        }
    
        /**
         * Constructor.
         *
         * Searches the database and retrieves the information about the
         * skill group, populating it and it's items.
         *
         * @param int $id Skill group identifier.
         */
        public function __construct($id){

            $statement = get_context()->get_db()->prepare("
              SELECT
                id,
                name,
                description
              FROM guild_skill_group
              WHERE id = :id;
            ");
            $statement->bindValue(':id', $id, SQLITE3_TEXT);
            $r = $statement->execute()->fetchArray(SQLITE3_ASSOC);
            if ($r){
                $this->id = $r["id"];
                $this->name = HTML::e($r["name"]);
                $this->description = HTML::e($r["description"]);
            }
        }
        
        private function load_skills(){
            $statement = get_context()->get_db()->prepare("
              SELECT id
              FROM guild_skill
              WHERE skill_group = :id;
            ");
            $statement->bindValue(':id', $this->id, SQLITE3_TEXT);
            $q = $statement->execute();
            while ($r = $q->fetchArray(SQLITE3_ASSOC)){
                array_push($this->skills, new Guild_Skill($r["id"]));
            }
            $this->flag_skills = true;
        }

        /**
         * Gets the pathto the monster image. The image must be in the
         * img/skill_guild/ directory, and its name must be the monster id,
         * padded with '0' to 1 digits, and the extension must be '.png'.
         *
         * @return string Image URL, or a fixed unknown image.
         */
        public function get_image(){
            return APPLICATION::img("SKILL_GUILD", $this->id);
        }

    }
?>