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var module = angular.module('myApp', []);

module.service('myService', function () {
    var uid = 1;

    var contacts = [{
        id: 0,
        'name': 'jCombat',
        'email': 'jcombat@gmail.com',
        'mobile': '123456789'
    }];

    var alertTxt = "";

    this.save = function (contact) {
        if (contact.name != null && !angular.isUndefined(contact.name)) {
            if (contact.id == null) {
                contact.id = uid++;
                contacts.push(contact);
                this.alertTxt = "Saved Successfully!";
            } else {
                for (var i in contacts) {
                    if (contacts[i].id == contact.id) {
                        contacts[i] = contact;
                    }
                }
                this.alertTxt = "Updated Successfully!";
            }
        } else {
            this.alertTxt = "Sorry, cannot be saved!";
        }
    }

    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.alertTxt = "Deleted Successfully!";
    }

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

module.controller('myController', function ($scope, myService) {

    $scope.contacts = myService.list();

    $scope.saveContact = function () {
        myService.save($scope.contact);
        alert(myService.alertTxt);
        $scope.contact = {};
    }

    $scope.delete = function (id) {
        myService.delete(id);
        alert(myService.alertTxt);
        if ($scope.contact.id == id) $scope.contact = {};
    }
    $scope.edit = function (id) {
        $scope.contact = angular.copy(myService.get(id));
    }
})
<div ng-app="myApp" ng-controller="myController">
    <h3>AngularJS Service demo - jCombat</h3>

    <h4>Registration Form</h4>

    <form>
        <table>
            <tr>
                <td>
                    <label>Name</label>
                </td>
                <td>
                    <input type="text" name="name" ng-model="contact.name" />
                </td>
            </tr>
            <tr>
                <td>
                    <label>Email</label>
                </td>
                <td>
                    <input type="text" name="email" ng-model="contact.email" />
                </td>
            </tr>
            <tr>
                <td>
                    <label>Mobile</label>
                </td>
                <td>
                    <input type="text" name="mobile" ng-model="contact.mobile" />
                </td>
            </tr>
            <tr>
                <td colspan="2">
                    <input type="button" value="Save" ng-click="saveContact()" />
                    <input type="hidden" ng-model="contact.id" />
                </td>
            </tr>
        </table>
    </form>
    <br/>
     <h4>Registered Users</h4>

    <table>
        <thead>
            <tr>
                <th>Name</th>
                <th>Email</th>
                <th>Mobile</th>
                <th>-</th>
            </tr>
        </thead>
        <tbody>
            <tr ng-repeat="contact in contacts">
                <td>{{ contact.name }}</td>
                <td>{{ contact.email }}</td>
                <td>{{ contact.mobile }}</td>
                <td><a href="javascript:void(0)" ng-click="edit(contact.id)">edit</a> | <a href="javascript:void(0)" ng-click="delete(contact.id)">delete</a>
                </td>
            </tr>
        </tbody>
    </table>
</div>
table, th, td {
    border: 1px solid grey;
    border-collapse: collapse;
    padding: 5px;
}
table tr:nth-child(odd) {
    background-color: #f1f1f1;
}
table tr:nth-child(even) {
    background-color: #ffffff;
}
h3 {
    color: #e53b2c;
}