SWDB/application/entity/Inventory.php

<?php
    /**
     * Inventory base entity file.
     *
     * Creates the entity and makes it available.
     *
     * @category Entity
     */

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

    /**
     * An inventory base item.
     *
     * Represents an object from the table 'inventory'.
     *
     * @category Entity
     */
    class Inventory extends Entity{

        /**
         * @var int Item identifier.
         */
        public $id;

        /**
         * @var string Item name.
         */
        public $name;

        /**
         * @var string Item type name.
         */
        public $type;

        /**
         * @var string Item description.
         */
        public $description;

        /**
         * Constructor.
         *
         * Searches the database and retrieves the information about the
         * building, populating it and it's items.
         *
         * @param int $id Item identifier.
         * @param int $type Item type identifier. Optional, will try to guess if null.
         */
        public function __construct($id, $type = null){
            $s = "
              SELECT
                inventory.id AS id,
                inventory.name AS name,
                inventory.description AS description,
                inventory_type.name AS type
              FROM
                inventory,
                inventory_type
              WHERE
                inventory.type = inventory_type.id AND
                inventory.id = :id
            ";
            if ($type != null){
                $s .= "AND inventory.type = :type";
            }
            $statement = get_context()->get_db()->prepare($s);
            $statement->bindValue(':id', $id, SQLITE3_TEXT);
            $statement->bindValue(':type', $type, SQLITE3_TEXT);
            $r = $statement->execute()->fetchArray(SQLITE3_ASSOC);
            if ($r){
                $this->type = $r["type"];
                $this->id = $r["id"];
                $this->name = HTML::e($r["name"]);
                $this->description = HTML::e($r["description"]);
            }
        }

        /**
         * Gets the path to the item image. The image must be in the
         * img/content/inventory/ directory, and its name must be the item id,
         * padded with '0' to 9 digites, and the extension must be '.png'.
         *
         * @return string Image URL, or a fixed unknown image.
         */
        public function get_image(){
            return APPLICATION::img("INVENTORY", $this->id);
        }
    }
?>