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<?php

/**
 * Miscellaneous useful functions.
 * @package Core
 */
class Misc{

    /**
     * Retrieve value from array by key, with default value support.
     * 
     * @param array   $array   Input array
     * @param string $key     Key to retrieve from the array
     * @param mixed $default Default value to return if the key is not found
     * @return mixed   An array value if it was found or default value if it is not
     * @access public  
     * @static 
     */
	public static function arr($array,$key,$default=null){
		if (isset($array[$key]))
			return $array[$key];
		return $default;
	}

    /**
     * Finds full path to a specified file
	 * It will search in the /application folder first, then in all enabled modules
	 * and then the /system folder
     * 
     * @param string  $subfolder  Subfolder to search in e.g. 'classes' or 'views'
     * @param string  $name       Name of the file without extension
	 * @param string  $extension  File extension
	 * @param boolean $return_all If 'true' returns all mathced files as array,
	 *                            otherwise returns the first file found
     * @return mixed  Full path to the file or False if it is not found
     * @access public  
     * @static 
     */
	public static function find_file($subfolder, $name, $extension = 'php', $return_all = false ) {
		
		$folders = array(APPDIR);
		
		foreach(Config::get('core.modules',array()) as $module)
			$folders[] = MODDIR.$module.'/';
		$folders[] = SYSDIR;

		$fname=$name.'.'.$extension;
		$found_files = array();
		
		foreach($folders as $folder) {
			$file = $folder.$subfolder.'/'.$fname;
			if (file_exists($file)) {
				if(!$return_all)
					return($file);
				$found_files[]=$file;
			}
		}
		
		if(!empty($found_files))
			return $found_files;
			
		return false;
	}
}