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

// Symbian Foundation Example Code

//

// This software is in the public domain. No copyright is claimed, and you 

// may use it for any purpose without license from the Symbian Foundation.

// No warranty for any purpose is expressed or implied by the authors or

// the Symbian Foundation. 

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

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

// A widget for accessing developer.symbian.org 

// Reference to the WRTKit user interface manager and main view.

var uiManager;

// Global settings / URLs and such

// Symbian.org web site base URL

//var symbianOrgBaseUrl = "http://staging.foundationhost.org";

//var symbianOrgBaseUrlSsl = "https://staging.foundationhost.org";

var symbianOrgBaseUrl = "http://developer.symbian.org";

var symbianOrgBaseUrlSsl = "https://developer.symbian.org";

var registrationURL = symbianOrgBaseUrl + "/main/user_profile/register.php";

var blogFeedName = "Symbian Blog";

var blogFeedUrl = "http://blog.symbian.org/feed/";

// FORUM vars and settings 

var symbianOrgNewThreadUrl = symbianOrgBaseUrl+"/forum/newthread.php?";

var symbianOrgNewReplyUrl = symbianOrgBaseUrl+"/forum/newreply.php?";

var symbianOrgLoginUrl = symbianOrgBaseUrlSsl+"/main/user_profile/login.php";

var symbianOrgLoginUsernameField = "username";

var symbianOrgLoginPasswordField = "password";

var forumUsername = null	;

var forumPassword = null;

// Feed name, URL etc for forums

var forumFeedName = "Symbian.org Forums";

var forumFeedURL = symbianOrgBaseUrl+ "/forum/external2.php?type=rss2"; //&fulldesc=1&lastpost=1

var forumsForumSpecQuery = "&forumid=";

var forumFeedUpdateFrequency = -1;

var forumGroupsUrl = symbianOrgBaseUrl+ "/rss/forum.php?type=groups";

var forumsListUrl = symbianOrgBaseUrl+ "/rss/forum.php?type=forums&group=";

var forumThreadUrl = symbianOrgBaseUrl+ "/rss/forum.php?type=threadmsgs&threadid=";

// Wiki url etc

var wikiFeedName = "New on Symbian.org Wiki";

var wikiFeedUrl = symbianOrgBaseUrl+"/wiki/index.php?title=Special:NewPages&feed=rss";

var wikiBaseUrl = symbianOrgBaseUrl+"/wiki/index.php";

// Update variables

var versionWikiPageUrl = wikiBaseUrl + "/Symbian.org_WRT_Widget";

var versionWikiPageString = "Current widget version is [";

var downloadUrl = symbianOrgBaseUrl + "/wiki/images/c/c5/Symbian.org.wgz";

// UI elements

// blog / forum instances

// all are SOScreen subclasses

var home;   // home screen

var blog;   // RSSReader showing blog

var wiki;   // RSSReader showing wiki

var bugzila; // RSSReader showing bugzilla feeds

var forumGroups; // RSSReader showing list of forum groups

var settings;

var about;

// currently showing SOScreen

var currentScreen = null;

// Controls for the settings view

var forumUsernameControl;

var forumPasswordControl;

// Constants for menu item identifiers.

var MENU_ITEM_SETTINGS = 0;

var MENU_ITEM_REFRESH = 1;

var MENU_ITEM_ABOUT = 2;

var MENU_ITEM_CHECK_UPDATE = 3;

var MENU_ITEM_LARGER_FONT = 4;

var MENU_ITEM_SMALLER_FONT = 5;

// Flag indicating weather the web site login has been initiated

var loginInitiated = false;

var loginInitiatedCallback = null;

var widgetHomepage = symbianOrgBaseUrl + "/wiki/index.php?title=Symbian.org_WRT_Widget&action=render";

var aboutText = "<strong>Symbian.org "+myversion+"</strong><br>"

				+ "Symbian.org WRT Widget is a Web Runtime application which allows mobile "

				+ "access to Symbian Foundation Forums, Blog, Wiki and Bugzilla. <br>"

				+ "For more information and updates check <div class=FeedItemLink>"

				+ "<a href=\"JavaScript:void(0)\" onclick=\"openURL('" 

				+ widgetHomepage 

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

				+" Symbian.org Widget Homepage </a> </div><p>"

				+ "Credits: Ivan Litovski, Ryan Grentz, James Mentz";

var currentFontSize = 14;

// Called from the onload event handler to initialize the widget.

function init() {

    // set tab-navigation mode and show softkeys

    // (only if we are in the WRT environment)

    if (window.widget) {

        widget.setNavigationEnabled(false);

        window.menu.showSoftkeys();

        // create menu

        var refreshMenuItem = new MenuItem("Refresh", MENU_ITEM_REFRESH);

        refreshMenuItem.onSelect = menuItemSelected;

        menu.append(refreshMenuItem);

        var settingsMenuItem = new MenuItem("Settings", MENU_ITEM_SETTINGS);

        settingsMenuItem.onSelect = menuItemSelected;

        menu.append(settingsMenuItem);

		var updateMenuItem = new MenuItem("Check for updates", MENU_ITEM_CHECK_UPDATE);

		updateMenuItem.onSelect = menuItemSelected;

		menu.append(updateMenuItem);

		var largerFontMenuItem = new MenuItem("Larger font", MENU_ITEM_LARGER_FONT);

		largerFontMenuItem.onSelect = menuItemSelected;

		menu.append(largerFontMenuItem);

		var smallerFontMenuItem = new MenuItem("Smaller font", MENU_ITEM_SMALLER_FONT);

		smallerFontMenuItem.onSelect = menuItemSelected;

		menu.append(smallerFontMenuItem);

		var aboutMenuItem = new MenuItem("About", MENU_ITEM_ABOUT);

		aboutMenuItem.onSelect = menuItemSelected;

		menu.append(aboutMenuItem);

    }

    // load prefs 

	if (!forumUsername || !forumPassword) {

		loadPreferences();

	}

    // create UI manager

    uiManager = new UIManager();

	// Create the home view

	home = new ListView(null, "<img src=logo.png>");

	// add forums button

	var forumsButton = new NavigationButton(1, "right.gif", "Forums")

	forumsButton.addEventListener("ActionPerformed", function(){forumGroups.show();});

	home.addControl(forumsButton);

	// add blogs button

	var blogsButton = new NavigationButton(2, "right.gif", "Blogs")

	blogsButton.addEventListener("ActionPerformed", function(){blog.show();});

	home.addControl(blogsButton);

	// add wiki button

	var wikiButton = new NavigationButton(3, "right.gif", "Wiki")

	wikiButton.addEventListener("ActionPerformed", function(){wiki.show();});

	home.addControl(wikiButton);

	// add bugzilla button

	var bugzillaButton = new NavigationButton(3, "right.gif", "Bugzilla")

	bugzillaButton.addEventListener("ActionPerformed", function(){login(function(){bugzilla.show();});});

	home.addControl(bugzillaButton);

	// soft keys

	home.setupSoftKeys = function()  {

	    if (window.widget) {

			menu.setRightSoftkeyLabel("Exit", function(){window.close();});

	    }

	}

	// create blog screen

	blog = new RssReader(blogFeedName, blogFeedUrl, null, home, null);

	// create wiki screen

	wiki = new RssReader(wikiFeedName, wikiFeedUrl, new ButtonFeedPresenter(null), home, null);

	// wiki feed contains full article text for many articles 

	// this takes up a _lot_ of memory. Also we don't 

	// really want the full text at the stage when we want a list

	// of recent articles.

	wiki.ignoreContent = true;

	wiki.maxItems = 20;

	bugzilla = new BugzillaSearchPanel(home);

	// create the top level forums screen - list of forum groups

	// forumsGroup, forum and thread screens are dynamically generated by forumGroups

	forumGroups = new RssReader("Forums", forumGroupsUrl, new ForumGroupsFeedPresenter(null), home, forumGroupsResponseParser);

    // create settings view

    settings = new ListView(null, createCaption("Settings"));

	settings.previousView = home;

	var settingsIntroLabel = new Label(null, null, 

		"In order to access all site features, you must login. "

		+ "If you have not registered yet, please click the 'Register' button below.");

	settings.addControl(settingsIntroLabel);

    // forum username control

    forumUsernameControl = new TextField('forumUsername', "Symbian.org username", forumUsername?forumUsername:"");

    settings.addControl(forumUsernameControl);

    // forum password control

    forumPasswordControl = new TextField('forumPassword', "Symbian.org password", forumPassword?forumPassword:"", true);

    settings.addControl(forumPasswordControl);

    // save settings button

    settingsSaveButton = new FormButton(null, "Save");

    settingsSaveButton.addEventListener("ActionPerformed", saveSettingsClicked);

    settings.addControl(settingsSaveButton);

    // cancel settings button

    var settingsRegisterButton = new FormButton(null, "Register");

    settingsRegisterButton.addEventListener("ActionPerformed", function(){openURL(registrationURL);});

    settings.addControl(settingsRegisterButton);

    // cancel settings button

    settingsCancelButton = new FormButton(null, "Cancel");

    settingsCancelButton.addEventListener("ActionPerformed", function(){settings.goBack();});

    settings.addControl(settingsCancelButton);

	//Create about view

	about = new ListView(null, createCaption("Symbian.org"));

    about.previousView = home;

	// About label control

	aboutLabel = new ContentPanel(null, null, null, true);

	aboutLabel.setCaption("About this Widget");

	aboutLabel.setContent(aboutText);

	aboutLabel.setExpanded(true);

	about.addControl(aboutLabel);

	home.show();

	setDefaultFontSizeForScreenSize();

	login(null);	

}

// Callback for when menu items are selected.

function menuItemSelected(id) {

	var currentView = uiManager.getView();

    switch (id) {

        case MENU_ITEM_SETTINGS:

			if ( currentView == settings || currentView == about) {

				settings.previousView = home;

			} else {

				settings.previousView = currentView;

			}

			uiManager.hideNotification();

            settings.show();

            break;

        case MENU_ITEM_REFRESH:

            currentView.update(true);

            break;

        case MENU_ITEM_LARGER_FONT:

            increaseFontSize();

            break;

        case MENU_ITEM_SMALLER_FONT:

            decreaseFontSize();

            break;

        case MENU_ITEM_CHECK_UPDATE:

            checkForUpdates();

            break;

		case MENU_ITEM_ABOUT:

			if ( currentView == settings || currentView == about) {

				about.previousView = home;

			} else {

				about.previousView = currentView;

			}

			about.show();

			break;

    }

}

// Loads widget preferences.

function loadPreferences() {

    if (window.widget) {

        // load settings from widget preferences store

        forumUsername = widget.preferenceForKey("forumUsername");

        forumPassword = widget.preferenceForKey("forumPassword");

    }

}

// Loads widget preferences.

function savePreferences() {

    if (window.widget) {

        // save settings in widget preferences store

        widget.setPreferenceForKey(forumUsername, "forumUsername");

        widget.setPreferenceForKey(forumPassword, "forumPassword");

    }

}

// Callback for settings view save button.

function saveSettingsClicked() {

	forumUsername = forumUsernameControl.getText();

	forumPassword = forumPasswordControl.getText();

    // save preferences

    savePreferences();

	settings.goBack();

	if ( loginInitiated ) {

		login(loginInitiatedCallback);

	}

}

// Opens a URL in a separate browser window

function openURL(url) {

    if (window.widget) {

        // in WRT

        widget.openURL(url);

    } else {

        // outside WRT

        window.open(url, "NewWindow");

    }

}

var updatePageAjax = null;

function checkForUpdates() {

	uiManager.showNotification(-1, "wait", "Checking for updates...", -1);

	updatePageAjax = new Ajax();

	updatePageAjax.onreadystatechange = checkForUpdatesStage2;

	updatePageAjax.open('GET', nocache(versionWikiPageUrl), true);

	updatePageAjax.send(null);	

}

function checkForUpdatesStage2() {

    if (updatePageAjax.readyState == 4) {

		// extract version number

		var content = updatePageAjax.responseText;

		var ind = content.indexOf(versionWikiPageString);

		if ( ind == -1 ) {

			uiManager.showNotification(3000, "warning", "Update failed, check manually.");

			return;

		}

		ind += versionWikiPageString.length;

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

		if ( ind2 == -1 || (ind2-ind) > 10 ) {

			uiManager.showNotification(3000, "warning", "Update failed, check manually.");

			return;

		}

		var version = content.substring(ind,ind2);

		// compare to this version

		if ( version != myversion ) {

			var answer = confirm("Install new version " + version + "?");

			if (answer) {

				// ok, we have the update

				uiManager.hideNotification();

				openURL(nocache(downloadUrl));

				setTimeout(function () {window.close();}, 1000);

			} else {

			uiManager.showNotification(3000, "info", "Update cancelled.");

			}

		} else {

			uiManager.showNotification(3000, "info", "Up to date!");

		}

	}

}

function createCaption(caption) {

	if (caption.length > 30) {

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

	}

	return  "<table border=0><tr><td style=\"{vertical-align:middle}\">"

		+ "<img src=titlebar.png style=\"{vertical-align:middle}\" >"

		+ "</td><td style=\"{vertical-align:middle}\"> " 

		+ "<p class=ListViewCaptionText>" + caption +"</p></td></tr></table>";

}

function setDefaultFontSizeForScreenSize(){

	// first check if there is a preference present

    if (window.widget) {

		var saved = widget.preferenceForKey("fontsize");

		if ( widget.preferenceForKey("fontsize") ) {

			setCssBodyFontSize(parseInt(saved));

		}

		else {

			// no preference available, check screen size

			if (window.screen.width > 400 || window.screen.height > 400) {

				// hi res screen, use large font

				setCssBodyFontSize(18);

			}

			else {

				// lo res screen, use small font

				setCssBodyFontSize(14);

			}

		}

	}

}

function increaseFontSize(){

    if (window.widget) {

		setCssBodyFontSize(currentFontSize + 2);

	}

}

function decreaseFontSize(){

    if (window.widget) {

		if (currentFontSize > 4) {

			setCssBodyFontSize(currentFontSize - 2);

		}

	}

}

function setCssBodyFontSize(size) {

    if (window.widget) {

		currentFontSize = size;

		var sizestring = "" + size;

		document.body.style.fontSize = sizestring + "px";

		widget.setPreferenceForKey(sizestring, "fontsize");

	}

}

function nocache(url) {

    if (url.indexOf("?") == -1) {

        url += "?";

    } else {

        url += "&";

    }

    url += "nocache=" + (new Date().getTime());

	return url;

}