Random gist for FB chat with Web Speech

gistfile1.txt

/*

Commands:
/muteall
/unmuteall

/muteme
/unmuteme

/mute
/unmute

/voice whisper
/voice 67

*/


window.chatObservers = [];
window.currentVoice = 0;
window.randomInt = new Date().getTime();
window.lastMessageNodes = {};
window.muteMe = false;
window.muteAll = false;
window.voiceMap = {
	male: 1,
	female: 2,
	indian: 3,
	grandma: 6,
	japanese: 7,
	troll :18,
	'church-bell': 19,
	autobot: 20,
	transformer: 24,
	joker: 33,
	choir: 32,
	whisper: 67,

};
window.replacedVoiceMap = {};
window.muteConvMap = {};

function checkMessage(convMsgs, id, isNew){
	var newMsg;
	if (convMsgs.lastChild.children.length == 4) 
		newMsg = convMsgs.lastChild.children[2].innerText;
	else
		newMsg = convMsgs.lastChild.innerText;

	//	Msg from me
	var fromMe = false;
	if (convMsgs.lastChild.className.indexOf("_1nc6") >= 0)
		fromMe = true;

	//	Skip same
	if (window.lastMessageNodes[id] == convMsgs.lastChild)
		return;

	window.lastMessageNodes[id] = convMsgs.lastChild;

	//	CMD
	var isCmd = false;
	if (newMsg.trim() == "/mute" && fromMe){
		isCmd = true;
		window.muteConvMap[id] = true;
		newMsg = "We will shutup";
	}
	if (newMsg.trim() == "/unmute" && fromMe){
		isCmd = true;
		delete window.muteConvMap[id];
		newMsg = "We may speak again";
	}

	if (newMsg.trim() == "/muteme" && fromMe){
		isCmd = true;
		window.muteMe = true;
		newMsg = "I will shutup";
	}
	if (newMsg.trim() == "/unmuteme" && fromMe){
		isCmd = true;
		window.muteMe = false;
		newMsg = "I may speak again";
	}

	if (newMsg.trim() == "/muteall"){
		isCmd = true;
		window.muteAll = true;
		newMsg = "All shut up";
	}
	if (newMsg.trim() == "/unmuteall"){
		isCmd = true;
		window.muteAll = false;
		newMsg = "All may speak again";
	}

	if (newMsg.trim().indexOf('/voice ') == 0){
		var voice = newMsg.trim().split(" ")[1];

		var index;
		//	By number or name
		if (!isNaN(voice)) {
			index = parseInt(voice);
		} else
			index = window.voiceMap[voice];

		if (window.speechSynthesis.getVoices()[index]){
			window.replacedVoiceMap[id] = index;
			newMsg = "I have a new voice";
		} else {
			newMsg = "Voice does not exist";
		}
	}

	//	Mute
	if (window.muteMe && fromMe && !isCmd)
		return;

	if (window.muteConvMap[id] && !isCmd)
		return;

	if (window.muteAll)
		return;

	if (fromMe && isNew)
		return;

	//	Play
	var msg = new SpeechSynthesisUtterance(newMsg);
	msg.voice = window.speechSynthesis.getVoices()[window.replacedVoiceMap[id] || 0];
    window.speechSynthesis.speak(msg);
}

function observeSingleChat(conv, isNew){
	var id = window.randomInt++;
	var convMsgs = conv.children[1].children[0].children[0].children[2].children[1].children[0].children[0].children[0].children[0].children[0].children[0].children[2].children[0];
	var observer = new window.WebKitMutationObserver(function(mutations) {
		checkMessage(convMsgs, id);
	});
	observer.observe(convMsgs, { childList: true});
	window.chatObservers.push({observer: observer, conv: conv});

	//	Also read last message
	if (isNew)
		checkMessage(convMsgs, id, isNew);
}

function unobserveSingleChat(conv){
	window.chatObservers = window.chatObservers.filter(function(item){
		if (item.conv == conv){
			item.observe.disconnect();
			return false;
		}
		return true;
	});
}

function observeChat(){
	var fbChats = document.getElementById("ChatTabsPagelet").children[0].children[0].children[1].children;
	for (var i = 0; i < fbChats.length; i++){
		(function(){
			var index = i;
			var conv = fbChats[index];
			observeSingleChat(conv);
		}());
	}
}

function observeChatParent(){
	observeChat();
	var fbChatsParent = document.getElementById("ChatTabsPagelet").children[0].children[1];
	var observer = new window.WebKitMutationObserver(function(mutations) {
		var addedNodes = mutations[0].addedNodes;
		var removedNodes = mutations[0].removedNodes;

		for (var i = 0; i < addedNodes.length; i++){
			var conv = addedNodes[i];
			observeSingleChat(conv, true);
		}

		for (var i = 0; i < removedNodes.length; i++){
			var conv = addedNodes[i];
			unobserveSingleChat(conv);
		}
	});
	observer.observe(fbChatsParent, { childList: true});
}

observeChatParent();