SWDB/application/page/Building_Page.php

 <?php
/**
 * Building view page file.
 *
 * Provides a class with all the properties and methods to display the page.
 *
 * @author Iñigo Valentin <i@inigovalentin.com>
 * @license https://www.gnu.org/licenses/gpl-3.0.en.html GNU General Public License V3
 * @package SWDB
 */

require_once(PATH::PAGE . "Page.php");
require_once(PATH::ENTITY . "Unit.php");

/**
 * Building view page model.
 *
 * @category Page
 */
class Building_Page extends Page{

    /**
     * @var Buildable|Decorative Selected building.
     */
    private $building;

    /**
     *  @var bool Checks if the selected item is a Decorative.
     */
    private $type_decorative = false;

    /**
     * Constructor.
     *
     * Retrieves the data and initializes the variables.
     *
     * @param string $id Selected unit id
     */
    public function __construct($id){
        parent::__construct();
        $this->set_public(true);
        $this->set_view("building.php");
        
        $statement = get_context()->get_db()->prepare("
          SELECT
            id,
            type
          FROM (
            SELECT id, 'buildable' AS type from buildable
            UNION
            SELECT id, 'decorative' as type FROM decorative
          )
          WHERE id = :id;
        ");
        $statement->bindValue(":id", $id, SQLITE3_INTEGER);
        
        $result = $statement->execute()->fetchArray(SQLITE3_ASSOC);
        if (! $result){
            $this->set_code(404);
            $this->set_message("Building not found");
        }
        else{
            if ($result["type"] == "buildable"){
                $this->building = new Buildable($id);
                $this->type_decorative = false;
            }
            elseif ($result["type"] == "decorative"){
                $this->building = new Decorative($id);
                $this->type_decorative = true;
            }
            if ($this->building == null || $this->building->get_id() == null){
                $this->set_code(404);
                $this->set_message("Building not found");
            }
            else{
                $this->set_code(200);
                $this->set_message("OK");
                $this->set_title($this->building->get_name());
                $this->set_description($this->building->get_name() . " details");
                $this->set_canonical("buildings/" . $this->building->get_id());
                $this->add_css("building.css");
            }
        }
    }

    /**
     * Retrieves the selected building.
     *
     * @return Buildable|Decorative Selected building.
     */
    public function get_building(){
        return $this->building;
    }
    
    /**
     * Checks if the selcted item is a decorative.
     * 
     * @return bool True if Decorative, false if Buildable.
     */
    public function is_decorative(){
        return $this->type_decorative;
    }

    /**
     * Checks if the selcted item is a buildable.
     *
     * @return bool True if Buildable, false if Decorative.
     */
    public function is_buildable(){
        return (! $this->type_decorative);
    }

}