// ////////////////////////////////////////////////////////////////////////////

// (c)2009 Symbian Foundation

// ////////////////////////////////////////////////////////////////////////////

// Forums

// Forums have the following structure:

//

// Forum group list

//   Forum list

//     Thread list

//       Message list

// All four views are based on customised RssReader. We customise two aspects:

// - Parsing XML - data is not RSS

// - Handling item selection (e.g. creating a new view for a newly selected forum)

// /////////////////////////////////////////////////////////////////////////////

// Forum groups

// response parser for forum groups

function forumGroupsResponseParser(broker, responseStatus, xmlDoc) {

    if (responseStatus == 200 && xmlDoc != null) {

        // node ref for iterating

        var node;

		// for compatibility with rss

		var lastModified = new Date();

        // init result items array

        var items = [];

		var elements = xmlDoc.getElementsByTagName("group");

		for (var i = 0; i < elements.length; i++) {

			var groupid = elements[i].getAttribute("id");

			var grouptitle = elements[i].getAttribute("title");

            items.push({ id: groupid, title: grouptitle});

		}

        // update was completed successfully

        return { status: "ok", lastModified: lastModified, items: items };

    } else {

        // update failed

        return { status: "error" };

    }

}

// FeedPresenter implementation for forum groups

function ForumGroupsFeedPresenter(rssreader){

	if (rssreader) {

		this.init(rssreader);

	}

}

// ForumGroupsFeedPresenter is a subclass of ButtonFeedPresenter

ForumGroupsFeedPresenter.prototype = new ButtonFeedPresenter(null);

// ForumGroupsFeedPresenter "Constructor"

ForumGroupsFeedPresenter.prototype.init = function(rssreader) {

	ButtonFeedPresenter.prototype.init.call(this, rssreader);

}

// Handle the click on a specific item

ForumGroupsFeedPresenter.prototype.feedClicked = function(event){

	var buttonid = event.source.id;

	if (buttonid == "latestPosts") {

		// show latest posts

		var url = forumFeedURL;

		var latestPostsView = new RssReader("Latest posts", url, new LatestPostsFeedPresenter(null), this.rssreader, null);

		latestPostsView.show();

	}

	else {

		// show forum group

		var groupid = this.items[buttonid].id;

		var grouptitle = this.items[buttonid].title;

		var url = forumsListUrl + groupid;

		var forumListView = new RssReader(grouptitle, url, new ForumsListFeedPresenter(null), this.rssreader, forumListResponseParser);

		forumListView.show();

	}

}

// Create and add controls to be shown before items list.

ForumGroupsFeedPresenter.prototype.addPreambleItems = function(){

	var feedItemControl = new NavigationButton("latestPosts", "blueright.gif", "Latest posts");

    var self = this;

	feedItemControl.addEventListener("ActionPerformed", function(event) { self.feedClicked(event); });

	this.rssreader.addControl(feedItemControl);

}

// ///////////////////////////////////////////////////////////////////////////

// List of forums in a group

// response parser for forum list - in a group

function forumListResponseParser(broker, responseStatus, xmlDoc) {

    if (responseStatus == 200 && xmlDoc != null) {

        // node ref for iterating

        var node;

		// for compatibility with rss

		var lastModified = new Date();

        // init result items array

        var items = [];

		// extract items for all group elements

		var elements = xmlDoc.getElementsByTagName("group");

		for (var i = 0; i < elements.length; i++) {

			var forumid = elements[i].getAttribute("id");

			var forumtitle = elements[i].getAttribute("title");

            items.push({ id: forumid, title: forumtitle});

		}

        // update was completed successfully

        return { status: "ok", lastModified: lastModified, items: items };

    } else {

        // update failed

        return { status: "error" };

    }

}

// FeedPresenter implementation for forum groups

function ForumsListFeedPresenter(rssreader){

	if (rssreader) {

		this.init(rssreader);

	}

}

// ForumsListFeedPresenter is a subclass of ButtonFeedPresenter

ForumsListFeedPresenter.prototype = new ButtonFeedPresenter(null);

// ForumsListFeedPresenter constructor

ForumsListFeedPresenter.prototype.init = function(rssreader) {

	ButtonFeedPresenter.prototype.init.call(this, rssreader);

}

// forum has been selected, create a reader showing threads in the forum

ForumsListFeedPresenter.prototype.feedClicked = function(event){

	var buttonid = event.source.id;

	if (buttonid == "latestPosts") {

		// show latest posts

		var url = forumFeedURL + "&forumids=";

		// append requested forum ids

		for( var i = 0; i < this.items.length; i++) {

			url += this.items[i].id + ",";

		}

		var latestPostsView = new RssReader(

			"Latest posts in " + this.rssreader.feedName, 

			url, 

			new LatestPostsFeedPresenter(null), 

			this.rssreader, 

			null);

		latestPostsView.show();

	}

	else {

		var forumid = this.items[buttonid].id;

		var forumtitle = this.items[buttonid].title;

		var url = forumFeedURL + forumsForumSpecQuery + forumid;

		var forumListView = new RssReader(forumtitle, url, new ThreadListFeedPresenter(null), this.rssreader, null);

		forumListView.show();

	}

}

// Create and add controls to be shown before items list.

ForumsListFeedPresenter.prototype.addPreambleItems = function(){

	var feedItemControl = new NavigationButton("latestPosts", "blueright.gif", "Latest posts in " + this.rssreader.feedName);

    var self = this;

	feedItemControl.addEventListener("ActionPerformed", function(event) { self.feedClicked(event); });

	this.rssreader.addControl(feedItemControl);

}

// ///////////////////////////////////////////////////////////////////////////

// List of threads in a forum

// response parser for thread list is the usual rss parser

// FeedPresenter implementation for forum groups

function ThreadListFeedPresenter(rssreader){

	if (rssreader) {

		this.init(rssreader);

	}

}

// ThreadListFeedPresenter is a subclass of ButtonFeedPresenter

ThreadListFeedPresenter.prototype = new ButtonFeedPresenter(null);

// ThreadListFeedPresenter constructor

ThreadListFeedPresenter.prototype.init = function(rssreader) {

	ButtonFeedPresenter.prototype.init.call(this, rssreader);

}

// Handle the click on a specific item

ThreadListFeedPresenter.prototype.feedClicked = function(event){

	var buttonid = event.source.id;

	if (buttonid == "newThread") {

		// extract forum id from rssreader.feedURL

		var ind = this.rssreader.feedURL.indexOf(forumsForumSpecQuery);

		var forumid = this.rssreader.feedURL.substring( ind + forumsForumSpecQuery.length);

		var postForm = new ForumPostForm(this.rssreader, forumid);

		postForm.show();

	}

	else {

		var weburl = this.items[buttonid].url;

		// extract thread id from url. looking for t=xxx

		var ind1 = weburl.indexOf("?t=");

		if (ind1 == -1) {

			ind1 = weburl.indexOf("&t=");

		}

		if (ind1 != -1) {

			var threadid = "";

			var ind2 = weburl.indexOf("&", ind1);

			if (ind2 == -1) {

				threadid = weburl.substring(ind1 + 3); // ?t=

			}

			else {

				threadid = weburl.substring(ind1 + 3, ind2); // ?t=

			}

			var url = forumThreadUrl + threadid;

			var title = this.items[buttonid].title;

			if (title.length > 30) {

				title = title.substring(0, 30) + "...";

			}

			var threadView = new RssReader(title, url, new ThreadFeedPresenter(null), this.rssreader, threadResponseParser);

			threadView.show();

		}

	}

}

// Create and add controls to be shown before items list.

ThreadListFeedPresenter.prototype.addPreambleItems = function(){

	var feedItemControl = new NavigationButton("newThread", "blueright.gif", "Post a new thread");

    var self = this;

	feedItemControl.addEventListener("ActionPerformed", function(event) { self.feedClicked(event); });

	this.rssreader.addControl(feedItemControl);

}

// ///////////////////////////////////////////////////////////////////////////

// List of messages in a thread

// response parser for thread list

function threadResponseParser(broker, responseStatus, xmlDoc) {

    if (responseStatus == 200 && xmlDoc != null) {

        // node ref for iterating

        var node;

		// for compatibility with rss

		var lastModified = new Date();

        // init result items array

        var items = [];

		// iterate over message elements

		var elements = xmlDoc.getElementsByTagName("message");

		for (var i = 0; i < elements.length; i++) {

			var postid;

			var threadid;

			var username;

			var title;

			var dateline;

			var pagetext;

			var isdeleted;

			// extract info about the post

			node = elements[i].firstChild;

			while (node != null) {

				if ( node.nodeName == "postid" ) postid=getTextOfNode(node);

				else if ( node.nodeName == "threadid" ) threadid=getTextOfNode(node);

				else if ( node.nodeName == "username" ) username=getTextOfNode(node);

				else if ( node.nodeName == "title" ) title=getTextOfNode(node);

				else if ( node.nodeName == "dateline" ) dateline=getTextOfNode(node);

				else if ( node.nodeName == "pagetext" ) pagetext=getTextOfNode(node);

				else if ( node.nodeName == "isdeleted" ) isdeleted=getTextOfNode(node);

				node = node.nextSibling;

			}

			if ( isdeleted == 1 ) continue;

			items.push({

				postid: postid,

				threadid: threadid,

				username: username,

				title: title,

				dateline: dateline,

				pagetext: pagetext

			});

		}

        // update was completed successfully

        return { status: "ok", lastModified: lastModified, items: items };

    } else {

        // update failed

        return { status: "error" };

    }

}

// FeedPresenter implementation for forum groups

function ThreadFeedPresenter(rssreader){

	if (rssreader) {

		this.init(rssreader);

	}

}

// ThreadFeedPresenter is a subclass of HtmlFeedPresenter

ThreadFeedPresenter.prototype = new HtmlFeedPresenter(null);

// ThreadFeedPresenter constructor

ThreadFeedPresenter.prototype.init = function(rssreader) {

	HtmlFeedPresenter.prototype.init.call(this, rssreader);

}

// Handle the click on a specific item

ThreadFeedPresenter.prototype.feedClicked = function(event){

	// do nothing

}

// Create a control that represents this item and add it to

// parent rss reader

ThreadFeedPresenter.prototype.show = function(item) {

	// get a feed item control from the pool or create one and

	// place it in the pool if there aren't enough feed item controls

	var feedItemControl = new ContentPanel(null, null, null, true);

	// initialize feed item control

	var title = item.title;

		title = "Re:";

		item.title = title;

	}

	feedItemControl.setCaption(bbcode2html(title));

	feedItemControl.setContent(this.getContentHTMLForFeedItem(item));

	feedItemControl.setExpanded(true);

	// add the feed item control to the main view

	this.rssreader.feedItemControls.push(feedItemControl);

	this.rssreader.addControl(feedItemControl);

}

// Generate HTML content from the feed item

ThreadFeedPresenter.prototype.getContentHTMLForFeedItem = function (item){

	var buf = "";

	// item date

	if (item.dateline != null) {

		var date = new Date();

		date.setTime(item.dateline*1000);

		buf += "<div class=\"FeedItemDate\">" ;

		if ( item.username != null ) {

			buf += item.username + ", ";

		}

		buf += date + "</div>";

	}

	// item description

	if (item.pagetext != null) {

		var text = bbcode2html(item.pagetext);

		text = text.replace(/\r\n/g, "<br>");

		buf += "<div class=\"FeedItemDescription\">" + text + "</div>";

        buf += "<div class=\"FeedItemLink\">";

		buf += "<a href=\"JavaScript:void(0)\" onclick=\"showReplyForm(" 

				+ item.threadid+ "," + item.postid + ", '" + item.title

				+ "'); return false;\">";

		buf += "<strong>Reply to this post<strong></a>"

		buf += "</div>";

	}

	return buf;

}

// Show the reply-to-post form

function showReplyForm(threadid, postid, title) {

	var replyForm = new ForumReplyForm(uiManager.currentView, threadid, postid, title);

	replyForm.show();

}

// ///////////////////////////////////////////////////////////////////////////

// Latest posts - same as ThreadListFeedPresenter, only has no preamble items

// because it doesn't show one thread (so we can't post to latest items)...

// FeedPresenter implementation for latest posts

function LatestPostsFeedPresenter(rssreader){

	if (rssreader) {

		this.init(rssreader);

	}

}

LatestPostsFeedPresenter.prototype = new ThreadListFeedPresenter(null);

// ForumGroupsFeedPresenter "Constructor"

LatestPostsFeedPresenter.prototype.init = function(rssreader) {

	ButtonFeedPresenter.prototype.init.call(this, rssreader);

}

// LatestPostsFeedPresenter has no preamble items

LatestPostsFeedPresenter.prototype.addPreambleItems = function(){

}

// ///////////////////////////////////////////////////////////////////////////

// Utilities

// Forum posts can be be quite messy and include bbcodes, smilies etc.

// This function does the minimum by stripping bbcodes and such

function sanitize(text) {

	var prevind = 0;

	var ind = text.indexOf("[");

	if ( ind == -1 ) return text;

	var buf = "";

	while ( ind != -1 ) {

		buf += text.substring(prevind, ind);

		var ind2 = text.indexOf("]", ind);

		if ( ind2 != -1 ) {

			prevind = ind2+1;

		} else {

			break;

		}

		ind = text.indexOf("[", prevind);

	}

	if ( prevind > 0 && prevind < text.length) {

		buf += text.substring(prevind);

	}

	return buf;

}