/**
 * msg.php
 *
 * @copyright © 2006 The Open University
 * @author a.little@open.ac.uk
 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
 * @package block_msg 
 *
 * Javascript & AJAX functions for setting MSG presence status
 * All these functions are adapted from the MSG standalone functions.
 * It's a PHP file so that the displayed text strings and URLs etc
 * can be generated from the Moodle code.
 */
 

   
    MSGAPIconf.imgroot = "http://moodle.ethompson.org/blocks/msg/images/";
            MSGAPIconf.msg_jabberurl = "http://community.ethompson.org:8080/buddyxml";
        
            MSGAPIconf.msg_host = "communty.ethompson.org";
        
            MSGAPIconf.msg_jabberui = "http://community.ethompson.org:8080/msg"; 
       
    MSGAPIconf.stateText['online'] = "Online";
    MSGAPIconf.stateText['away'] = "Away";
    MSGAPIconf.stateText['chat'] = "Online";
    MSGAPIconf.stateText['dnd'] = "Do not disturb";
    MSGAPIconf.stateText['offline'] = "Offline";
    MSGAPIconf.stateText['xa'] = "Away";

            MSGAPIconf.peekTimeoutNoInterrupt = 5000;
        
            MSGAPIconf.peekTimeoutInterrupt = 30000;
        
    MSGAPIconf.checkLoginTimeout = 2000;

    MSGAPIconf.str_oneMessageUnread = "1 unread message";
    MSGAPIconf.str_messagesUnread = " unread messages";
    MSGAPIconf.str_popupRead = "[[popupRead]]";
    MSGAPIconf.str_popupClose = "[[popupClose]]";

    MSGAPIconf.maxLoginAttempts = 5; 
    
            MSGAPIconf.global_online_url = "http://community.ethompson.org:8080/buddyxml/mashup.jsp?data=sessions&verbose=true&type=json";
        
            MSGAPIconf.global_total_url = "http://community.ethompson.org:8080/buddyxml/mashup.jsp?data=counters&type=json";
        
    MSGAPIconf.global_online_counter_id = 'block_msg_global_online';
    MSGAPIconf.global_counter_id = 'block_msg_global_total';
    MSGAPIconf.personal_online_url = "http://moodle.ethompson.org/blocks/msg/services/getpersonalcontacts.php";
    MSGAPIconf.personal_online_counter_id = 'block_msg_personal_online';
    MSGAPIconf.personal_counter_id = 'block_msg_personal_total';
    
            MSGAPIconf.global_online_refresh_rate = 1000;
        
            MSGAPIconf.personal_online_refresh_rate = 1000;
        
            MSGAPIconf.clientWindowName = "MSGClientWindow";
        
            MSGAPIconf.clientWindowProps = "width=500,height=400,scrollbars=yes,resizable=yes";
        
    MSGAPIconf.str_popupBlocked = "MSG tried to open as a popup window, but you have blocked popups.\n\n You can unblock popups via the 'Tools... (Internet) Options...' menu in your browser.";
    
            MSGAPIconf.user_sessions_url = "http://community.ethompson.org:8080/buddyxml/mashup.jsp?data=sessions&verbose=true&type=json";
         
             
             
    authArr = new Array();
    authArr['resource'] = "Moodle";
    authArr['username'] = "MoodleSession";
    authArr['password'] = "checkthecookie";
    authArr['MoodleSession'] = "6sopln8f6so9ni5cu9dqsqqb93";
    authArr['MoodleSessionTest'] = "2TznNm4Wpz";
    
    initMSG(authArr,"0"," "); 
    
    
    myMSG.enableMSGLinks = EnableLinks;
    myMSG.disableMSGLinks = DisableLinks;
    
    map = null;

/**
 *
 */
function EnableLinks(){
    enableLink("MSGLaunchLink","javascript:launchClick();");
    enableLink("MSGLaunchMapLink",MSGAPIconf.msg_jabberui+"/map");
    var mme = document.getElementById("msg_map_enlarge");
    if(mme){
        mme.innerHTML = "";  
        var anch = document.createElement("a");
        anch.setAttribute("target","MSGPresenceMap");
        anch.setAttribute("href",MSGAPIconf.msg_jabberui+"/map");
        anch.setAttribute("title","Interact with map");
        anch.appendChild(document.createTextNode("[Zoom/interact]"));
        mme.appendChild(anch);
    }
}


/**
 *
 */
function DisableLinks(){
    disableLink("MSGLaunchLink");
    disableLink("MSGMapLink");
    var mme = document.getElementById("msg_map_enlarge");
    if(mme){
        mme.innerHTML = "";
    }
}

/**
 * Start MSG
 */
function startMSG(){
    checkLogin(); 
    monitorGlobalOnline();
    loadMap();
}

/**
 * Monitor only
 */
function monitorMSG(){
    monitorGlobalOnline();
    loadMap();
}

/**
 * Load the Google map
 */
function loadMap(){
    if(document.getElementById("block_msg_googlemap") != null){
        if (GBrowserIsCompatible()) {
            map = new GMap2(document.getElementById("block_msg_googlemap"));
            map.addControl(new GSmallZoomControl());
            // set default centre
            map.setCenter(new GLatLng(17.383,11.183), 0);
        }  
        
        // load users and display on map
        loadSessionUsers();    
    }   
    
} 


function MoodleBlockZoomToLocation(){
    // move map to user location and add on a marker for the user
    if(map!= null && conf_currentUserLat != 0 && conf_currentUserLng != 0){
        var point = new GLatLng(conf_currentUserLat, conf_currentUserLng);
        map.setCenter(point, 8);
        map.addOverlay(new GMarker(point, new MoodleBlockMapMarker()));
    }
}

function MoodleBlockMapMarker(){
    var icon = new GIcon();
    icon.image = "http://moodle.ethompson.org/blocks/msg/images/not-logged-in-icon.png";
    icon.shadow = "http://moodle.ethompson.org/blocks/msg/images/not-logged-in-shad.png";
    icon.iconSize = new GSize(22, 15);
    icon.shadowSize = new GSize(22, 15);
    icon.iconAnchor = new GPoint(11, 14);
    icon.infoWindowAnchor = new GPoint(13,5);  
    return icon; 
}

function loadSessionUsers(){
    request = MSGAPIconf.user_sessions_url + "&callback=loadSessionUsersCallback";
    aObj = new JSONscriptRequest(request);
    aObj.buildScriptTag();
    aObj.addScriptTag();
}

function loadSessionUsersCallback(jData){
    if(!jData){
        return;   
    }
    // loop thru returned data
    var sessions = jData.children[0].children;
    for(var i=0; i<sessions.length; i++){
        
        var lat = sessions[i].attributes["lat"];
        var lng = sessions[i].attributes["lng"];
        if (lat != "" && lng != ""){
            var point = new GLatLng(lat, lng);
            map.addOverlay(new GMarker(point, new MoodleBlockMapMarker()));
        }
    }
}