/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Adrian Havill <havill@redhat.com>
 *   Ian Neal <iann_bugzilla@blueyonder.co.uk>
 *   Stefan Hermes <stefanh@inbox.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

var gLanguageNames;
var gAvailableLanguages;
var gOtherLanguages;
var gSelectedLanguages = [];
var gInvalidLanguages;

function OnLoadAddLanguages() {
	gLanguageNames = window.arguments[0];
	gAvailableLanguages = document.getElementById("availableLanguages");
	//  gSelectedLanguages = document.getElementById("intl.accept_languages").value.split(/\s*,\s*/);
	//gSelectedLanguages = getPrefValue("intl.accept_languages").split(/\s*,\s*/);
	
	// We are using language list items from arguments instead read it from pref
	//  gSelectedLanguages = window.arguments[1];
	//  var params1 = { enter: gLanguages, out: null };
	
	// Convert the childNodes object array to a string array
	var langlist = "";
	for (var j = 0; j < window.arguments[1].enter.length; j++) {
		langlist = langlist + window.arguments[1].enter[j].value + ",";
	}
	langlist = langlist.substring(0, (langlist.length - 1));
	gSelectedLanguages = langlist.split(/\s*,\s*/);
	
	gOtherLanguages = document.getElementById("otherLanguages");
	
	if (gLanguageNames) {
		for (var i = 0; i < gLanguageNames.length; i++) {
			if (gSelectedLanguages.indexOf(gLanguageNames[i][1]) == -1)
				gAvailableLanguages.appendItem(gLanguageNames[i][0],
					gLanguageNames[i][1]);
		}
	}
}

function IsRFC1766LangTag(aCandidate) {
	/* reject bogus lang strings, INCLUDING those with HTTP "q"
	values kludged on the end of them
	
	Valid language codes examples:
	i.e. ja-JP-kansai (Kansai dialect of Japanese)
	en-US-texas (Texas dialect)
	i-klingon-tng (did TOS Klingons speak in non-English?)
	sgn-US-MA (Martha Vineyard's Sign Language)
	 */
	var tags = aCandidate.split('-');
	var checkedTags = 0;
	
	if (/^[ix]$/.test(tags[0])) {
		if (tags.length < 2)
			return false;
		checkedTags++;
	} else
		/* if not IANA "i" or a private "x" extension, the primary
		tag should be a ISO 639 country code, two or three letters long.
		we don't check if the country code is bogus or not.
		 */{
		if (!/^[a-z]{2,3}$/.test(tags[0]))
			return false;
		checkedTags++;
		
		/* the first subtag can be either a 2 letter ISO 3166 country code,
		or an IANA registered tag from 3 to 8 characters.
		 */
		if (tags.length > 1) {
			if (!/^[a-z0-9]{2,8}$/.test(tags[1]))
				return false;
			
			/* do not allow user-assigned ISO 3166 country codes */
			if (/^(aa|zz|x[a-z]|q[m-z])$/.test(tags[1]))
				return false;
			checkedTags++;
		}
	}
	
	/* any remaining subtags must be one to eight alphabetic characters */
	while (checkedTags < tags.length) {
		if (!/^[a-z0-9]{1,8}$/.test(tags[checkedTags]))
			return false;
		checkedTags++;
	}
	return true;
}

function WriteAddedLanguages(aListbox) {
	var invalidLangs = [];
	// selected languages
	var languages = aListbox.selectedItems;
	var addedLang = Array.map(languages, function (e) {
			return e.value;
		});
	
	// user-defined languages
	languages = gOtherLanguages.value;
	if (languages) {
		let languageIds = languages.replace(/\s+/g, "").toLowerCase().split(",");
		for (var i = 0; i < languageIds.length; i++) {
			let languageId = languageIds[i];
			if (IsRFC1766LangTag(languageId)) {
				if (addedLang.indexOf(languageId) == -1 &&
					gSelectedLanguages.indexOf(languageId) == -1)
					addedLang.push(languageId);
			} else {
				invalidLangs.push(languageId);
			}
		}
	}
	
	if (invalidLangs.length)
		gInvalidLanguages = invalidLangs.join(", ");
	else
		gSelectedLanguages = gSelectedLanguages.concat(addedLang);
	
	return gSelectedLanguages.join(",");
}

function OnAccept() {
	var LangsToAdd = WriteAddedLanguages(gAvailableLanguages);
	if (!gInvalidLanguages) {
		//window.arguments[1].out = LangsToAdd.split(/\s*,\s*/);
		window.arguments[1].out = gSelectedLanguages;
		return true;
	} else {
		let prefLangBundle = document.getElementById("prefLangAddBundle");
		const kErrorMsg = prefLangBundle.getString("illegalOtherLanguage") + " " +
			gInvalidLanguages;
		const kErrorTitle = prefLangBundle.getString("illegalOtherLanguageTitle");
		let prompter = Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
			.getService(Components.interfaces.nsIPromptService);
		prompter.alert(this.window, kErrorTitle, kErrorMsg);
		
		gInvalidLanguages = null;
		gOtherLanguages.focus();
		
		return false;
	}
}

function HandleDoubleClick() {
	//DoBeforeAccept();
	document.documentElement.acceptDialog();
}

function DoBeforeAccept() {
	//gAvailableLanguages.doCommand();
	//var LangsToAdd = WriteAddedLanguages(gAvailableLanguages);
	//document.documentElement.acceptDialog();
}
