371 lines
12 KiB
JavaScript
371 lines
12 KiB
JavaScript
/**
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* Implements API class that embeds Jitsi Meet in external applications.
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*/
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var JitsiMeetExternalAPI = (function()
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{
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/**
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* The minimum width for the Jitsi Meet frame
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* @type {number}
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*/
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var MIN_WIDTH = 790;
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/**
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* The minimum height for the Jitsi Meet frame
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* @type {number}
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*/
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var MIN_HEIGHT = 300;
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/**
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* Constructs new API instance. Creates iframe element that loads
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* Jitsi Meet.
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* @param domain the domain name of the server that hosts the conference
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* @param room_name the name of the room to join
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* @param width width of the iframe
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* @param height height of the iframe
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* @param parent_node the node that will contain the iframe
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* @constructor
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*/
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function JitsiMeetExternalAPI(domain, room_name, width, height, parent_node)
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{
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this.parentNode = null;
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if(parent_node)
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{
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this.parentNode = parent_node;
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}
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else
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{
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var scriptTag = document.scripts[document.scripts.length - 1];
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this.parentNode = scriptTag.parentNode;
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}
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this.iframeHolder =
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this.parentNode.appendChild(document.createElement("div"));
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this.iframeHolder.id = "jitsiConference" + JitsiMeetExternalAPI.id;
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if(width < MIN_WIDTH)
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width = MIN_WIDTH;
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if(height < MIN_HEIGHT)
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height = MIN_HEIGHT;
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this.iframeHolder.style.width = width + "px";
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this.iframeHolder.style.height = height + "px";
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this.frameName = "jitsiConferenceFrame" + JitsiMeetExternalAPI.id;
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this.url = "//" + domain + "/";
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if(room_name)
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this.url += room_name;
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this.url += "#external";
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JitsiMeetExternalAPI.id++;
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this.frame = document.createElement("iframe");
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this.frame.src = this.url;
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this.frame.name = this.frameName;
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this.frame.id = this.frameName;
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this.frame.width = "100%";
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this.frame.height = "100%";
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this.frame.setAttribute("allowFullScreen","true");
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this.frame = this.iframeHolder.appendChild(this.frame);
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this.frameLoaded = false;
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this.initialCommands = [];
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this.eventHandlers = {};
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this.initListeners();
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}
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/**
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* Last id of api object
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* @type {number}
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*/
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JitsiMeetExternalAPI.id = 0;
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/**
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* Sends the passed object to Jitsi Meet
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* @param object the object to be sent
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*/
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JitsiMeetExternalAPI.prototype.sendMessage = function(object)
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{
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if(this.frameLoaded)
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{
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this.frame.contentWindow.postMessage(
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JSON.stringify(object), this.frame.src);
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}
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else
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{
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this.initialCommands.push(object);
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}
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};
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/**
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* Executes command. The available commands are:
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* displayName - sets the display name of the local participant to the value
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* passed in the arguments array.
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* muteAudio - mutes / unmutes audio with no arguments
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* muteVideo - mutes / unmutes video with no arguments
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* filmStrip - hides / shows the film strip with no arguments
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* If the command doesn't require any arguments the parameter should be set
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* to empty array or it may be omitted.
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* @param name the name of the command
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* @param arguments array of arguments
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*/
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JitsiMeetExternalAPI.prototype.executeCommand = function(name,
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argumentsList)
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{
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var argumentsArray = argumentsList;
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if(!argumentsArray)
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argumentsArray = [];
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var object = {type: "command", action: "execute"};
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object[name] = argumentsArray;
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this.sendMessage(object);
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};
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/**
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* Executes commands. The available commands are:
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* displayName - sets the display name of the local participant to the value
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* passed in the arguments array.
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* muteAudio - mutes / unmutes audio with no arguments
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* muteVideo - mutes / unmutes video with no arguments
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* filmStrip - hides / shows the film strip with no arguments
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* @param object the object with commands to be executed. The keys of the
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* object are the commands that will be executed and the values are the
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* arguments for the command.
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*/
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JitsiMeetExternalAPI.prototype.executeCommands = function (object) {
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object.type = "command";
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object.action = "execute";
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this.sendMessage(object);
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};
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/**
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* Adds event listeners to Meet Jitsi. The object key should be the name of the
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* event and value - the listener.
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* Currently we support the following
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* events:
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* incomingMessage - receives event notifications about incoming
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* messages. The listener will receive object with the following structure:
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* {{
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* "from": from,//JID of the user that sent the message
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* "nick": nick,//the nickname of the user that sent the message
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* "message": txt//the text of the message
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* }}
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* outgoingMessage - receives event notifications about outgoing
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* messages. The listener will receive object with the following structure:
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* {{
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* "message": txt//the text of the message
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* }}
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* displayNameChanged - receives event notifications about display name
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* change. The listener will receive object with the following structure:
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* {{
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* jid: jid,//the JID of the participant that changed his display name
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* displayname: displayName //the new display name
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* }}
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* participantJoined - receives event notifications about new participant.
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* The listener will receive object with the following structure:
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* {{
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* jid: jid //the jid of the participant
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* }}
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* participantLeft - receives event notifications about participant that left room.
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* The listener will receive object with the following structure:
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* {{
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* jid: jid //the jid of the participant
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* }}
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* @param object
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*/
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JitsiMeetExternalAPI.prototype.addEventListeners
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= function (object)
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{
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var message = {type: "event", action: "add", events: []};
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for(var i in object)
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{
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message.events.push(i);
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this.eventHandlers[i] = object[i];
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}
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this.sendMessage(message);
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};
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/**
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* Adds event listeners to Meet Jitsi. Currently we support the following
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* events:
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* incomingMessage - receives event notifications about incoming
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* messages. The listener will receive object with the following structure:
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* {{
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* "from": from,//JID of the user that sent the message
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* "nick": nick,//the nickname of the user that sent the message
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* "message": txt//the text of the message
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* }}
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* outgoingMessage - receives event notifications about outgoing
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* messages. The listener will receive object with the following structure:
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* {{
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* "message": txt//the text of the message
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* }}
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* displayNameChanged - receives event notifications about display name
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* change. The listener will receive object with the following structure:
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* {{
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* jid: jid,//the JID of the participant that changed his display name
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* displayname: displayName //the new display name
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* }}
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* participantJoined - receives event notifications about new participant.
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* The listener will receive object with the following structure:
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* {{
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* jid: jid //the jid of the participant
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* }}
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* participantLeft - receives event notifications about participant that left room.
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* The listener will receive object with the following structure:
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* {{
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* jid: jid //the jid of the participant
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* }}
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* @param event the name of the event
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* @param listener the listener
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*/
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JitsiMeetExternalAPI.prototype.addEventListener
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= function (event, listener)
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{
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var message = {type: "event", action: "add", events: [event]};
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this.eventHandlers[event] = listener;
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this.sendMessage(message);
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};
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/**
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* Removes event listener.
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* @param event the name of the event.
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*/
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JitsiMeetExternalAPI.prototype.removeEventListener
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= function (event)
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{
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if(!this.eventHandlers[event])
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{
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console.error("The event " + event + " is not registered.");
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return;
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}
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var message = {type: "event", action: "remove", events: [event]};
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delete this.eventHandlers[event];
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this.sendMessage(message);
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};
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/**
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* Removes event listeners.
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* @param events array with the names of the events.
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*/
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JitsiMeetExternalAPI.prototype.removeEventListeners
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= function (events)
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{
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var eventsArray = [];
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for(var i = 0; i < events.length; i++)
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{
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var event = events[i];
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if(!this.eventHandlers[event])
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{
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console.error("The event " + event + " is not registered.");
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continue;
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}
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delete this.eventHandlers[event];
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eventsArray.push(event);
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}
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if(eventsArray.length > 0)
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{
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this.sendMessage(
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{type: "event", action: "remove", events: eventsArray});
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}
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};
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/**
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* Processes message events sent from Jitsi Meet
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* @param event the event
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*/
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JitsiMeetExternalAPI.prototype.processMessage = function(event)
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{
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var message;
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try {
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message = JSON.parse(event.data);
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} catch (e) {}
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if(!message.type) {
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console.error("Message without type is received.");
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return;
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}
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switch (message.type)
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{
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case "system":
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if(message.loaded)
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{
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this.onFrameLoaded();
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}
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break;
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case "event":
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if(message.action != "result" ||
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!message.event || !this.eventHandlers[message.event])
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{
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console.warn("The received event cannot be parsed.");
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return;
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}
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this.eventHandlers[message.event](message.result);
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break;
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default :
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console.error("Unknown message type.");
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return;
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}
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};
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/**
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* That method is called when the Jitsi Meet is loaded. Executes saved
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* commands that are send before the frame was loaded.
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*/
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JitsiMeetExternalAPI.prototype.onFrameLoaded = function () {
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this.frameLoaded = true;
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for (var i = 0; i < this.initialCommands.length; i++)
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{
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this.sendMessage(this.initialCommands[i]);
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}
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this.initialCommands = null;
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};
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/**
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* Setups the listener for message events from Jitsi Meet.
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*/
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JitsiMeetExternalAPI.prototype.initListeners = function () {
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var self = this;
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this.eventListener = function (event) {
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self.processMessage(event);
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};
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if (window.addEventListener)
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{
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window.addEventListener('message',
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this.eventListener, false);
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}
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else
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{
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window.attachEvent('onmessage', this.eventListener);
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}
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};
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/**
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* Removes the listeners and removes the Jitsi Meet frame.
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*/
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JitsiMeetExternalAPI.prototype.dispose = function () {
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if (window.removeEventListener)
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{
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window.removeEventListener('message',
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this.eventListener, false);
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}
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else
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{
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window.detachEvent('onmessage',
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this.eventListener);
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}
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var frame = document.getElementById(this.frameName);
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if(frame)
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frame.src = 'about:blank';
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var self = this;
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window.setTimeout(function () {
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self.iframeHolder.removeChild(self.frame);
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self.iframeHolder.parentNode.removeChild(self.iframeHolder);
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}, 10);
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};
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return JitsiMeetExternalAPI;
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})(); |