app.js

var myApp=angular.module("myApp",[]);
myApp.service("ContactService",function(){
	var uid=1;
	var contacts=[{
		    'id':0,
			'lname':'MohdAman',
			'uname':'aman_7',
			'dob':'1998-08-04',
			'country':'India'}];	
	this.save=function(contact)  
	{
		if(contact.id==null)                       
		{
			contact.id=uid++;
			contacts.push(contact);
		}
		else
		{
			for(var i in contacts)
			{
				if(contacts[i].id==contact.id)
				{
					contacts[i]=contact;
				}
			}
		}
	};

	this.get=function(id)
	{
		for(var i in contacts)
		{
			if(contacts[i].id==id)
			{
				return contacts[i];
			}
		}
	};

	this.delete=function(id)
	{
		for(var i in contacts)
			{
				if(contacts[i].id==id)
				{
					contacts.splice(i,1);
				}
			}
	};

	this.list=function()
	{
		return contacts;
	}	;	
});	

myApp.controller("ContactController",function($scope,ContactService){
    console.clear();
    $scope.ifSearchUser=false;
    $scope.title="List of Users";
		$scope.contacts=ContactService.list();
		$scope.saveContact=function()
		{
		  console.log($scope.newcontact);
		  if($scope.newcontact==null || $scope.newcontact==angular.undefined)
		  return;
			ContactService.save($scope.newcontact);
			$scope.newcontact={};
		};		
		$scope.delete=function(id)
		{
			ContactService.delete(id);
			if($scope.newcontact!=angular.undefined && $scope.newcontact.id==id)
				{
					$scope.newcontact={};
				}
		};		
		$scope.edit=function(id)
		{
			$scope.newcontact=angular.copy(ContactService.get(id));
		};		
		$scope.searchUser=function(){
		  if($scope.title=="List of Users"){
		    $scope.ifSearchUser=true;
		    $scope.title="Back";
		  }
		  else
		  {
		    $scope.ifSearchUser=false;
		    $scope.title="List of Users";
		  }		  
		};
});