SaveRoom.module

<?php namespace ProcessWire;

/**
 * Save Room Module
 *
 * Adds hooks to handle all the necessary steps that are needed to 
 * save the Room template
 * 
 * @attention: Please look into SaveSensor.module for more detailed comments.
 */

class SaveRoom extends WireData implements Module {

	/**
	 * getModuleInfo required by module interface
	 * @return array
	 */
	public static function getModuleInfo() {

		return array(
			'title' => 'Save actions for Room template', 
			'version' => "0.1.1", 
			'summary' => 'Simple module to manage save actions on template Room.',
			'singular' => true, 
			'autoload' => true, 
			//'icon' => 'smile-o', 
			);
	}

	/**
	 * Initialize the module
	 */
	public function init() {

		// add a hook after the $pages->save, to issue hook  every time a page is saved
		$this->pages->addHookAfter('saveReady', $this, 'calculateRoom'); 	
	}

	/**
	 * Hook for saving template Room 
	 * 
	 * @param HookEvent $event
	 */
	public function calculateRoom($event) {
		$page = $event->arguments(0);
        $settings= wire('pages')->get('/settings/');

		// return if not relevant
		if($page->template->name !== 'Room') return;

        // ////////////////////
        // set default values 

        if (empty($page->height))          $page->height          = $settings->height;  
        if (empty($page->co2_alarm_level)) $page->co2_alarm_level = $settings->co2_alarm_level;  
        if (empty($page->co2_warn_level))  $page->co2_warn_level  = $settings->co2_warn_level;  
        if (empty($page->temp_max_level))  $page->temp_max_level  = $settings->temp_max_level;  
        if (empty($page->temp_min_level))  $page->temp_min_level  = $settings->temp_min_level;  


        // ////////////////////
        // Do Checks

        if ($page->co2_alarm_level < $page->co2_warn_level){ 
            $this->error("CO2 alarm level is bigger than CO2 warn level");
        }

        if ($page->person_curren < $page->person_max){ 
            $this->error("Too many people in the room");
        } 
 

        // ////////////////////
		// calculate fields

        // As cubic meters is a Decimal field it cuts of the unneeded digits automatically. 
		$page->cubic_meters = $page->square_meters * $page->height;

        
        // If there are no sensors , Instructors , you cannot activate the room
        if ($page->room_instructor->count() == 0) $page->active = 0;
        if ($page->room_sensors->count() == 0)     $page->active = 0;

        if (!$page->active) $this->warning("ATTENTION: Room not active! You need an instructor and a sensor"); 
        
         

   	
	}


	
	
}