Add support to get setup JSON data

For module loader usage

src/G11n.php

@@ -9,7 +9,6 @@
 use ElKuKu\G11n\Language\Parser\Code;
 use ElKuKu\G11n\Language\Parser\Language;
 use ElKuKu\G11n\Language\Storage;
-use ElKuKu\G11n\Support\ExtensionHelper;
 
 require_once __DIR__ . '/Language/methods.php';
 
@@ -92,6 +91,13 @@ abstract class G11n
 	 */
 	protected static $pluralFunctionJsStr = '';
 
+	/**
+	 * The pluralization function for Javascript as a raw string.
+	 *
+	 * @var string
+	 */
+	protected static $pluralFunctionJsStrRaw = '';
+
 	/**
 	 * This is for, well... debugging =;)
 	 *
@@ -462,11 +468,6 @@ public static function getLanguageParser(string $type): Language
 	 */
 	protected static function setPluralFunction(string $pcrePluralForm): void
 	{
-		if (!$pcrePluralForm || ';' === $pcrePluralForm)
-		{
-			return;
-		}
-
 		if (preg_match("/nplurals\s*=\s*(\d+)\s*\;\s*plural\s*=\s*(.*?)\;+/", $pcrePluralForm, $matches))
 		{
 			$nplurals   = $matches[1];
@@ -499,6 +500,8 @@ protected static function setPluralFunction(string $pcrePluralForm): void
 		self::$pluralFunctionRaw = $expression;
 
 		self::$pluralFunctionJsStr = "phpjs.create_function('n', '" . $jsFuncBody . "')";
+
+		self::$pluralFunctionJsStrRaw = $jsFuncBody;
 	}
 
 	/**
@@ -525,6 +528,25 @@ public static function getJavaScript(): string
 		return implode("\n", $js);
 	}
 
+	/**
+	 * Get the JavaScript declaration in JSON format.
+	 *
+	 * @return  string
+	 *
+	 * @since  5.0.2
+	 */
+	public static function getJavaScriptJson(): string
+	{
+		$data = new \stdClass;
+
+		$data->debug = self::$debug;
+		$data->strings = self::$stringsJs;
+		$data->stringsPlural = self::$stringsJsPlural;
+		$data->pluralFunction = self::$pluralFunctionJsStrRaw;
+
+		return json_encode($data);
+	}
+
 	/**
 	 * Processes the final translation. Decoding and converting \n to <br /> if necessary.
 	 *

src/Language/Storage.php

@@ -151,7 +151,7 @@ public static function getTemplatePath(string $extension, string $scope) : strin
 	 *
 	 * @return string pcre type PluralForms
 	 */
-	protected static function translatePluralForms(string $gettextPluralForms) : string
+	protected function translatePluralForms(string $gettextPluralForms) : string
 	{
 		$expr = $gettextPluralForms . ';';
 		$exprLen = \strlen($expr);