refactoring lang class.

system/lang.php

@@ -28,6 +28,10 @@ class Lang {
 	/**
 	 * Create a new Lang instance.
 	 *
+	 * Language lines are retrieved using "dot" notation. So, asking for the
+	 * "messages.required" language line would return the "required" line
+	 * from the "messages" language file.	 
+	 *
 	 * @param  string  $line
 	 * @return void
 	 */
@@ -63,7 +67,6 @@ class Lang {
 
 		if ( ! array_key_exists($language.$file, static::$lines))
 		{
-			// The language file doesn't exist, return the default value.
 			$line = is_callable($default) ? call_user_func($default) : $default;
 		}
 		else
@@ -82,13 +85,14 @@ class Lang {
 	/**
 	 * Parse a language key.
 	 *
+	 * The value on the left side of the dot is the language file name,
+	 * while the right side of the dot is the item within that file.
+	 *	 
 	 * @param  string  $key
 	 * @return array
 	 */
 	private function parse($key)
 	{
-		// The left side of the dot is the file name, while the right side of the dot
-		// is the item within that file being requested.
 		$segments = explode('.', $key);
 
 		if (count($segments) < 2)
@@ -108,14 +112,11 @@ class Lang {
 	 */
 	private function load($file, $language)
 	{
-		// If we have already loaded the language file or the file doesn't exist, bail out.
-		if (array_key_exists($language.$file, static::$lines) or ! file_exists($path = APP_PATH.'lang/'.$language.'/'.$file.EXT))
+		if ( ! array_key_exists($language.$file, static::$lines) and file_exists($path = APP_PATH.'lang/'.$language.'/'.$file.EXT))
 		{
-			return;
-		}
-
 			static::$lines[$language.$file] = require $path;
 		}
+	}
 
 	/**
 	 * Set the place-holder replacements.