AngularJS, Firebase: Querying

main.html

<h2>{{ title }}</h2>

<div class="jumbotron">
  <div ng-repeat="message in messages">
    {{ message.user }} - {{ message.text }}
  </div>
</div>

<div class="row marketing">
  <input type="text" class="form-control" ng-model="currentUser" />
  <div class="input-group">
    <input type="text" class="form-control" ng-model="currentText" />
    <span class="input-group-btn">
      <button class="btn btn-default" type="button" ng-click="sendMessage()">Send</button>
    </span>
  </div>
</div>

main.js

/*global Firebase*/
'use strict';

angular.module('firebaseApp')
  .controller('MainCtrl', function ($scope, $timeout) {
    var rootRef = new Firebase('https://glaring-fire-877.firebaseio.com/');
    var messagesRef = rootRef.child('messages');
    var titleRef = rootRef.child('title');

    // scope variables
    $scope.title = null;
    $scope.currentUser = null;
    $scope.currentText = null;
    $scope.messages = [];

    // Pull from Firebase one time using 'once'
    titleRef.once('value', function(snapshot) {
        $scope.title = snapshot.val();
    });

    // 'child_added' to get new child added to node
    // using 'child_added' on first load, gets all items in node, then any new child add to node
    messagesRef.on('child_added', function (snapshot) {
        $timeout(function () {
            var snapshotVal = snapshot.val();
            //console.log(snapshotVal);

            // get name of node when updated
            $scope.messages.push({
                text: snapshotVal.text,
                user: snapshotVal.user,
                name: snapshot.name()
            });
        });
    });

    // on child changed
    messagesRef.on('child_changed', function (snapshot) {
        $timeout(function () {
            var snapshotVal = snapshot.val();
            var message = findMessageByName(snapshot.name());

            // update message text
            message.text = snapshotVal.text;
        });
    });

    // on child removed
    messagesRef.on('child_removed', function (snapshot) {
        $timeout(function () {
            deleteMessageByName(snapshot.name());
            $('input').val("");
        });
    });

    function findMessageByName(name){
        var messageFound = null;
        for(var i = 0; i < $scope.messages.length; i++){
            var currentMessage = $scope.messages[i];
            if(currentMessage.name === name){
                messageFound = currentMessage;
                break;
            }
        }
        return messageFound;
    }

    function deleteMessageByName(name){
        for(var i = 0; i < $scope.messages.length; i++){
            var currentMessage = $scope.messages[i];
            if(currentMessage.name === name){
                $scope.messages.splice(i,1);
                break;
            }
        }
    }

    $scope.sendMessage = function() {
        // declare object
        var newMessage = {
            user: $scope.currentUser,
            text: $scope.currentText
        };

        // push 'newMessage' object to Firebase
        messagesRef.push(newMessage);
    };

  });