<?php

/*!

* Pattern Engine Class

*

* Copyright (c) 2014 Dave Olsen, http://dmolsen.com

* Licensed under the MIT license

*

* Set-up the selected pattern engine

*

*/

namespace PatternLab;

use \PatternLab\Config;

use \PatternLab\Console;

use \PatternLab\Timer;

class PatternEngine {

protected static $rules = array();

protected static $instance;

/**

* Get an instance of the Pattern Engine

*/

public static function getInstance() {

return self::$instance;

}

/**

* Load a new instance of the Pattern Loader

*/

public static function init() {

$found = false;

$patternExtension = Config::getOption("patternExtension");

self::loadRules();

foreach (self::$rules as $rule) {

if ($rule->test($patternExtension)) {

self::$instance = $rule;

$found = true;

break;

}

}

if (!$found) {

Console::writeError("the supplied pattern extension didn't match a pattern loader rule. check your config...");

}

}

/**

* Load all of the rules related to Pattern Engines. They're located in the plugin dir

*/

public static function loadRules() {

// default var

$configDir = Config::getOption("configDir");

// make sure the pattern engine data exists

if (file_exists($configDir."/patternengines.json")) {

// get pattern engine list data

$patternEngineList = json_decode(file_get_contents($configDir."/patternengines.json"), true);

// get the pattern engine info

foreach ($patternEngineList["patternengines"] as $patternEngineName) {

self::$rules[] = new $patternEngineName();

}

} else {

Console::writeError("The pattern engines list isn't available in <path>".$configDir."</path>...");

}

}

}