delete convo from sms contact

chat.js

var chatManager = function(datamcflyRef) {
	this.datamcflyRef = datamcflyRef;
};

chatManager.prototype = {
	chats: [], // collection of chats in progress

	getChat: function(fromNumber) {
		// finds or creates a chat from a particular recipient
		var foundChat = null;

		// search existing chats
		for (c = 0; c < this.chats.length; c++) {
			if (this.chats[c].from == fromNumber) {
				foundChat = this.chats[c];
			}
		}

		// no existing chat found, so create a new one
		if (foundChat == null) {
			foundChat = new chat( this.datamcflyRef );
			foundChat.init(fromNumber);
			foundChat.displayTemplate();
			this.chats.push(foundChat);
		}

		return foundChat;
	},
	updateChats: function() {
		var _this = this;
		this.datamcflyRef.once('value', function (data) {
			data.forEach( function(message){					
				var row = message.value();
				_this.getChat( row.fromNumber ).addMessage(
					row.textMessage,
					row.tstamp,
					row.direction
				);
			});
		});
		this.datamcflyRef.on('added', function (data) {
			var row = data.value();
			_this.getChat( row.fromNumber ).addMessage(
				row.textMessage,
				row.tstamp,
				row.direction
			);
		});
	}
};

var chat = function(datamcflyRef) {
	this.datamcflyRef = datamcflyRef;
};
chat.prototype = {
	// represents a chat window, renders messages to the screen
	init: function(name) {
		this.from = name; // name of person the chat is from
		// div id names
		this.chatName = 'chat-' + this.from;
		this.chatBox = 'chatbox-' + this.from;
		this.buttonName = 'submit-' + this.from;
                this.delName = 'del-' + this.from;
		this.textName = 'reply-' + this.from;
	},
	replyMessage: function(message) {
		// this is called when you click the reply button
		// calls the controller to send a Twilio SMS and update our Data McFly app
		var _this = this;
		$.ajax({
			type: "POST",
			url: "/reply",
			data: {
				'To': this.from,
				'Body': message,
				'From': this.from
			},
			dataType: "json",
			success: function(data) {
				// your message was sent
			}
		});
	},
	displayTemplate: function() {
		// draw the html for a chat window
		var content = '<div class="chatName" id="'+ this.chatBox + '">Chat with ' + this.from + '</div> \
		<div class="messages" id="' + this.chatName + '"></div> \
		<div class="messageForm"><textarea id="' + this.textName + '"></textarea><button id="' + this.buttonName + '">Reply</button><hr />
<button id="' + this.delName + '">Delete</button></div> \
	  </div>';
		// wrap the template	
		content = '<div class="chatWindow" id="' + this.tmplName + '">' + content + '</div>';
		// Add it to the screen
		$('#templateContainer').append(content);
		var _this = this;
		// handler for reply button
		$('#' + this.buttonName).click(function() {
			_this.replyMessage($('#' + _this.textName).val());
			$('#' + _this.textName).val('');
		});
		$('#' + this.delName).click(function() {
			_this.delMessage( _this.from );
			$('#' + _this.chatBox).remove();
		});
	},
	addMessage: function(message, tstamp, direction) {
		// add a message to this chat
		$('#' + this.chatName).append("<div class='message_" + direction + "'>" + message + "<div class='tstamp'>" + tstamp + "</div></div>");
	},
	delMessage: function( from ){
		var _this = this;
		_this.datamcflyRef.where({'fromNumber':from}).on("value", function(snapshot) {
			snapshot.forEach( function(chat){
				_this.datamcflyRef.remove( chat.value()._id, function( removed ) {
					console.log('Deleted Document : ', removed.value() );
				});
			});
		});
	}
};