Crop Image Before Upload using Cropper JS in Laravel

Crop Image Before Upload using Cropper JS in Laravel

laravel cropper js example, laravel crop image before upload, crop image using cropper.js laravel, laravel crop image before upload cropper.js, cropper js laravel example, laravel image upload cropper, how to use image cropper in laravel

Hi Guys,

In this tutorial,I will learn you how to use image cropper in laravel.you can simply and easy to use crop image using cropper.js laravel

Cropper.js is an easy to use JavaScript/jQuery plugin for image cropping with support of live previews and custom aspect ratio.this plugin provide features move,zoom,rotate,Fully responsive and mobile-friendly.

The plugin displays a resizable grid layer on a given image allowing to visually resize and crop the image.

Link :- https://www.nicesnippets.com/blog/laravel-crop-image-before-upload-using-cropper-js

Angular 9 Tutorial: Learn to Build a CRUD Angular App Quickly

What's new in Bootstrap 5 and when Bootstrap 5 release date?

What’s new in HTML6

How to Build Progressive Web Apps (PWA) using Angular 9

What is new features in Javascript ES2020 ECMAScript 2020

Top Vue.js Developers in USA

Top Vue.js Developers in USA

Vue.js is an extensively popular JavaScript framework with which you can create powerful as well as interactive interfaces. Vue.js is the best framework when it comes to building a single web and mobile apps.

We, at HireFullStackDeveloperIndia, implement the right strategic approach to offer a wide variety through customized Vue.js development services to suit your requirements at most competitive prices.

Vue.js is an open-source JavaScript framework that is incredibly progressive and adoptive and majorly used to build a breathtaking user interface. Vue.js is efficient to create advanced web page applications.

Vue.js gets its strength from the flexible JavaScript library to build an enthralling user interface. As the core of Vue.js is concentrated which provides a variety of interactive components for the web and gives real-time implementation. It gives freedom to developers by giving fluidity and eases the integration process with existing projects and other libraries that enables to structure of a highly customizable application.

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How to create a live chat app using Laravel and Vue.js

How to create a live chat app using Laravel and Vue.js

In this tutorial, we will be looking at how to build a live chat using Laravel and Vue.js where people can log in and chat with each other. This is a feature we see in applications like YouTube or Facebook during a live event.

Introduction

In this article, we’ll be building an app where users can log in with their usernames and then join a live chat. Here is what our app will look like:

Requirements

To follow along with this article, you need the following:

If you have these requirements we can begin.

Creating our Laravel application

We will start by creating a new Laravel application. By now, you should have the Laravel CLI, so you can just run this command to create a new project:

$ laravel new larachat

This will create a new Laravel application in a larachat folder.

Setting up Pusher Chatkit in the app

Before we go ahead to enable Chatkit in our app, open the Chatkit app, go to the Console tab and create a new user named admin. Create a new room named live-chat with the admin.

Open the room you have just created and note the room ID. Copy it out as you will soon need it.

To enable Chatkit in our app, we will need to add the keys to our app environment. Add these new properties at the bottom of the .env file found in your project directory:

If you don’t have the .env file for some reason, rename the .env.example file to .env and run the command: php artisan key:generate

    # File: .env
    # [...]

    CHATKIT_INSTANCE_LOCATOR="INSTANCE_LOCATOR_HERE"
    CHATKIT_SECRET_KEY="SECRET_KEY_HERE"
    CHATKIT_GENERAL_ROOM_ID="GENERAL_ROOM_ID"

    MIX_APP_URL="${APP_URL}"
    MIX_CHATKIT_INSTANCE_LOCATOR="${CHATKIT_INSTANCE_LOCATOR}"

You need to replace the placeholder values with the credentials from your Chatkit app. The CHATKIT_INSTANCE_LOCATOR and CHATKIT_SECRET_KEY can be gotten from the Credentials tab of the Chatkit instance. Replace CHATKIT_GENERAL_ROOM_ID with the room ID you copied out earlier. MIX_APP_URL and MIX_CHATKIT_INSTANCE_LOCATOR references the APP_URL and CHATKIT_INSTANCE_LOCATOR respectively.

Still in the .env file, update the APP_URL like so:

    APP_URL=http://localhost:8000

To enable our application can use the environment credentials we added earlier, open the config/services.php file and in there add the snippet below to the array of third-party services:

    // File: config/services.php
    'chatkit' => [
        'secret' => env('CHATKIT_SECRET_KEY'),
        'locator' => env('CHATKIT_INSTANCE_LOCATOR'),
    ],

Next we will need to do is install the Chatkit PHP SDK. Run this command in the root directory of your project to install the Chatkit package:

$ composer require pusher/pusher-chatkit-server

Next, open app/providers/AppServiceProvider.php and add the following code inside the register method:

    // File: app/providers/AppServiceProvider.php
    $this->app->bind('ChatKit', function() {
        return new \Chatkit\Chatkit([
            'instance_locator' => config('services.chatkit.locator'),
            'key' => config('services.chatkit.secret'),
        ]);
    });

The above snippet will bind the Chatkit service within the register method into Laravel’s IoC container. We can now resolve it from anywhere within our app and it will return an instance of the configured Chatkit class.

Building the application logic

Now we have our Laravel application configured and Chatkit SDK setup, let’s write the core functionality of our chat app.

First, we will create and update some controllers. Still in your root directory, run this command to create a new controller:

$ php artisan make:controller ChatkitController

Open the app/Http/Controllers/ChatkitController.php file and replace the contents with this snippet:

    <?php
    // File: app/Http/Controllers/ChatkitController.php

    namespace App\Http\Controllers;

    use Illuminate\Http\Request;

    class ChatkitController extends Controller
    {
        private $chatkit;
        private $roomId;

        public function __construct()
        {
            $this->chatkit = app('ChatKit');
            $this->roomId = env('CHATKIT_GENERAL_ROOM_ID');
        }

        /**
         * Show the welcome page.
         *
         * @return \Illuminate\Contracts\Support\Renderable
         */
        public function index(Request $request)
        {
            $userId = $request->session()->get('chatkit_id')[0];

            if (!is_null($userId)) {
                // Redirect user to Chat Page
                return redirect(route('chat'));
            }

            return view('welcome');
        }

        /**
         * The user joins chat room.
         *
         * @param  \Illuminate\Http\Request $request
         * @return mixed
         */
        public function join(Request $request)
        {
            $chatkit_id = strtolower(str_random(5));

            // Create User account on Chatkit
            $this->chatkit->createUser([
                'id' =>  $chatkit_id,
                'name' => $request->username,
            ]);

            $this->chatkit->addUsersToRoom([
                'room_id' => $this->roomId,
                'user_ids' => [$chatkit_id],
            ]);

            // Add User details to session
            $request->session()->push('chatkit_id', $chatkit_id);

            // Redirect user to Chat Page
            return redirect(route('chat'));
        }

        /**
         * Show the application chat room.
         *
         * @return \Illuminate\Contracts\Support\Renderable
         */
        public function chat(Request $request)
        {
            $roomId = $this->roomId;

            $userId = $request->session()->get('chatkit_id')[0];

            if (is_null($userId)) {
                $request->session()->flash('status', 'Join to access chat room!');
                return redirect(url('/'));
            }

            // Get messages via Chatkit
            $fetchMessages = $this->chatkit->getRoomMessages([
                'room_id' => $roomId,
                'direction' => 'newer',
                'limit' => 100
            ]);

            $messages = collect($fetchMessages['body'])->map(function ($message) {
                return [
                    'id' => $message['id'],
                    'senderId' => $message['user_id'],
                    'text' => $message['text'],
                    'timestamp' => $message['created_at']
                ];
            });

            return view('chat')->with(compact('messages', 'roomId', 'userId'));
        }

        /**
         * Receives a client request and provides a new token.
         *
         * @param  \Illuminate\Http\Request  $request
         * @return mixed
         */
        public function authenticate(Request $request)
        {
            $response = $this->chatkit->authenticate([
                'user_id' => $request->user_id,
            ]);

            return response()
                ->json(
                    $response['body'],
                    $response['status']
                );
        }

         /**
         * Send user message.
         *
         * @param  \Illuminate\Http\Request  $request
         * @return mixed
         */
        public function sendMessage(Request $request)
        {
            $message = $this->chatkit->sendSimpleMessage([
                'sender_id' => $request->user,
                'room_id' => $this->roomId,
                'text' => $request->message
            ]);

            return response($message);
        }

        /**
         * Get all users.
         *
         * @param  \Illuminate\Http\Request  $request
         * @return mixed
         */
        public function getUsers()
        {
            $users = $this->chatkit->getUsers();

            return response($users);
        }

        /**
         * Get all users.
         *
         * @param  \Illuminate\Http\Request  $request
         * @return mixed
         */
        public function logout(Request $request)
        {
            $request->session()->flush();

            return redirect(url('/'));
        }
    }

In the ChatkitController above we have several methods, namely: index, join, chat, authenticate, sendMessage, getUsers and logout.

The index method returns the welcome page if a user ID doesn’t exist in the current session else it redirects to the chat page.

The join method uses the resolved Chatkit SDK instance, creates a new user on Chatkit and add the user to the live-chat room and then save the users Chatkit ID in the current session before redirecting the user to the chat page.

The chat method handles the chat page when loaded on the browser. Inside it, we get the current user Chatkit ID from the session. If a Chatkit ID is not found, we return the user to the welcome page. The Chatkit ID, room ID, and chat room messages properties are then passed to the chat page view.

The authenticate method will act as a token provider server that receives the client's request and returns a valid JWT to your Chatkit client.

In the sendMessage method, we use the SDK’s sendSimpleMessage method, which accepts the sender_id, room_id and text to send a message to the chat room. The getUsers method returns all the users created on our Chatkit instance. Our logout method flushes the current session and redirects to the welcome page.

Next, we will update the web routes. Open routes/web.php and paste the code below to override the default :

    // File: routes/web.php
    Route::get('/', '[email protected]');
    Route::post('/', '[email protected]');
    Route::get('chat', '[email protected]')->name('chat');
    Route::post('logout', '[email protected]')->name('logout');

Open routes/api.php and add the code below in the file:

    // File: routes/api.php
    Route::post('authenticate','[email protected]');
    Route::get('users', '[email protected]');
    Route::post('message','[email protected]');

The newly added routes will provide endpoints to authenticate a client request, show a chat and send a message.

Building the application frontend

First, we will update the welcome page of the app. Open a resources/views/welcome.blade.php file and paste the code below to update the file:

    
    
    getLocale()) }}">
    
        
        
        Live Chat
        
        
        
        
        
        
        
    
    
        
            
                
                    Join Live Chat
                
                @if(Session::has('status'))
                    
                        {{ Session::get('status') }}
                    
                @endif
                
                    
                        @csrf
                        
                            <input type="text" name="username" class="form-control" 
                              placeholder="Enter your username">
                            
                                
                                  Join
                                
                            
                        
                    
                
            
        
    
    

The welcome.blade.php view contains a Join Live Chat title and a simple form that submits the entered username in the input field to join the live chat room.

Next, we will build the chat page to read and send messages. A chatbox component will be created using Vue.js to handle the chat feature.

Open a terminal tab in your project directory and run the command below:

$ npm install

This command installs the required development dependencies in the package.json file. Next, we need to install Chatkit. Run this command to install it:

$ npm install moment @pusher/chatkit-client --save-dev

Now create a ChatBoxComponent.vue file in the resources/js/components/ directory and paste the code snippet below inside the file.

    
    
      
        
            
                * ({{ formatTime(message.timestamp) }}) * : **{{ findSender(message.senderId).name }}**
                {{ message.text }}
            
        
        
* * *

        
            
            
              Send
            
        
      
    

    
    

The ChatBoxComponent.vue single file component is divided into three sections:

  • template tag contains our HTML syntax for the chat box providing the information to be shown.
  • script tag holds the logic that keeps data and methods. It also performs various operations like authentication, sending and receiving messages.
  • style tag provides the simplest option to add CSS to a Vue.js component.

The script tag keeps the logic of our Vue component. Inside this tag, first, we imported the libraries we will make use of. The export default block exports an object literal as our component’s view model and is responsible for the behavior of our component. This block houses other sections.

The props section helps us to pass custom data to the component from its instances. The data section is used to set up the component state. Every property you define in data becomes reactive meaning that if there is a change, it will be reflected in the view.

The method section holds the methods just as the name implies. In our component, we have six methods for various actions.

  • connectToChatkit method handles the connection to Chatkit from the client (browser) interface. It defines a TokenProvider and then the ChatManager is created with the token provider, allowing the client to connect to the Chatkit servers. On a successful connection, the currentUser data state is updated and the subscribeToRoom method is called.
  • subscribeToRoom method handles the connection to a particular room and is able to hook in some actions to respond to certain events like when a new message is sent, a user joins the room or leaves the room.
  • getUser method fetches all users on the Chatkit instance and updates the users data state with the response body gotten.
  • sendMessage method gets data from the input field and makes a post request to send the message.
  • findSender method accepts a senderId parameter and uses this to find a user on the this.users data.
  • formatTime method using the imported moment library returns a human readable time.

The created section is one of the used life cycle hooks used for initialization. In our case, we called the connectToChatkit and getUsers method there.

Next, open resources/js/app.js and add the Vue instance like so:

    // resources/js/app.js
    Vue.component('chatbox', require('./components/ChatBoxComponent.vue').default); 

The above code line registers the ChatBoxComponent.vue using chatbox as its basename. Now, go back to the terminal and run the command below:

$ npm run dev

This command will run a development build process using webpack to compile all resources/js files into the public/js/app.js file.

The command npm run prod is used in the case you want to it in a production environment

Next, create a resources/views/chat.blade.php file and paste the code below:

    
    
    getLocale()) }}">
    
        
        
        
        
        Live Chat
        
        
        
        
        
        
        
    
    
        
            
                <a class="dropdown-item" href="{{ route('logout') }}" onclick="event.preventDefault();
                document.getElementById('logout-form').submit();">
                    Leave Chat Room
                
                
                    @csrf
                
            
            
                
                    
                        
                             Live Chat Room 

                             
                        
                    
                
            
        
    
    

Inside the chat.blade.php, we added the chatbox tag that renders our ChatBoxComponent we created earlier and above it, we have Leave Chat Room link that logs the user out.

Finally, to test our app run the command below to serve the application:

$ php artisan serve

Now open http://localhost:8000 on two separate browser windows. Register two different accounts and try chatting between the two users. You should have results similar to this:

Conclusion

In this tutorial, we have seen how to add a live chatting experience to our app. The application was created using Laravel and Vue.js. The Chatkit API is very extensible and provides features not covered in this tutorial. You can leverage this knowledge to work with other features Chatkit provides in a Laravel app.

The source code is available on GitHub.

How to Use Express.js, Node.js and MongoDB.js

How to Use Express.js, Node.js and MongoDB.js

In this post, I will show you how to use Express.js, Node.js and MongoDB.js. We will be creating a very simple Node application, that will allow users to input data that they want to store in a MongoDB database. It will also show all items that have been entered into the database.

In this post, I will show you how to use Express.js, Node.js and MongoDB.js. We will be creating a very simple Node application, that will allow users to input data that they want to store in a MongoDB database. It will also show all items that have been entered into the database.

Creating a Node Application

To get started I would recommend creating a new database that will contain our application. For this demo I am creating a directory called node-demo. After creating the directory you will need to change into that directory.

mkdir node-demo
cd node-demo

Once we are in the directory we will need to create an application and we can do this by running the command
npm init

This will ask you a series of questions. Here are the answers I gave to the prompts.

The first step is to create a file that will contain our code for our Node.js server.

touch app.js

In our app.js we are going to add the following code to build a very simple Node.js Application.

var express = require("express");
var app = express();
var port = 3000;
 
app.get("/", (req, res) => {
&nbsp;&nbsp;res.send("Hello World");
});
 
app.listen(port, () => {
  console.log("Server listening on port " + port);
});

What the code does is require the express.js application. It then creates app by calling express. We define our port to be 3000.

The app.use line will listen to requests from the browser and will return the text “Hello World” back to the browser.

The last line actually starts the server and tells it to listen on port 3000.

Installing Express

Our app.js required the Express.js module. We need to install express in order for this to work properly. Go to your terminal and enter this command.

npm install express --save

This command will install the express module into our package.json. The module is installed as a dependency in our package.json as shown below.

To test our application you can go to the terminal and enter the command

node app.js

Open up a browser and navigate to the url http://localhost:3000

You will see the following in your browser

Creating Website to Save Data to MongoDB Database

Instead of showing the text “Hello World” when people view your application, what we want to do is to show a place for user to save data to the database.

We are going to allow users to enter a first name and a last name that we will be saving in the database.

To do this we will need to create a basic HTML file. In your terminal enter the following command to create an index.html file.

touch index.html

In our index.html file we will be creating an input filed where users can input data that they want to have stored in the database. We will also need a button for users to click on that will add the data to the database.

Here is what our index.html file looks like.

<!DOCTYPE html>
<html>
  <head>
    <title>Intro to Node and MongoDB<title>
  <head>

  <body>
    <h1>Into to Node and MongoDB<&#47;h1>
    <form method="post" action="/addname">
      <label>Enter Your Name<&#47;label><br>
      <input type="text" name="firstName" placeholder="Enter first name..." required>
      <input type="text" name="lastName" placeholder="Enter last name..." required>
      <input type="submit" value="Add Name">
    </form>
  <body>
<html>

If you are familiar with HTML, you will not find anything unusual in our code for our index.html file. We are creating a form where users can input their first name and last name and then click an “Add Name” button.

The form will do a post call to the /addname endpoint. We will be talking about endpoints and post later in this tutorial.

Displaying our Website to Users

We were previously displaying the text “Hello World” to users when they visited our website. Now we want to display our html file that we created. To do this we will need to change the app.use line our our app.js file.

We will be using the sendFile command to show the index.html file. We will need to tell the server exactly where to find the index.html file. We can do that by using a node global call __dirname. The __dirname will provide the current directly where the command was run. We will then append the path to our index.html file.

The app.use lines will need to be changed to
app.use("/", (req, res) => {   res.sendFile(__dirname + "/index.html"); });

Once you have saved your app.js file, we can test it by going to terminal and running node app.js

Open your browser and navigate to “http://localhost:3000”. You will see the following

Connecting to the Database

Now we need to add our database to the application. We will be connecting to a MongoDB database. I am assuming that you already have MongoDB installed and running on your computer.

To connect to the MongoDB database we are going to use a module called Mongoose. We will need to install mongoose module just like we did with express. Go to your terminal and enter the following command.
npm install mongoose --save

This will install the mongoose model and add it as a dependency in our package.json.

Connecting to the Database

Now that we have the mongoose module installed, we need to connect to the database in our app.js file. MongoDB, by default, runs on port 27017. You connect to the database by telling it the location of the database and the name of the database.

In our app.js file after the line for the port and before the app.use line, enter the following two lines to get access to mongoose and to connect to the database. For the database, I am going to use “node-demo”.

var mongoose = require("mongoose"); mongoose.Promise = global.Promise; mongoose.connect("mongodb://localhost:27017/node-demo");

Creating a Database Schema

Once the user enters data in the input field and clicks the add button, we want the contents of the input field to be stored in the database. In order to know the format of the data in the database, we need to have a Schema.

For this tutorial, we will need a very simple Schema that has only two fields. I am going to call the field firstName and lastName. The data stored in both fields will be a String.

After connecting to the database in our app.js we need to define our Schema. Here are the lines you need to add to the app.js.
var nameSchema = new mongoose.Schema({   firstName: String,   lastNameName: String });

Once we have built our Schema, we need to create a model from it. I am going to call my model “DataInput”. Here is the line you will add next to create our mode.
var User = mongoose.model("User", nameSchema);

Creating RESTful API

Now that we have a connection to our database, we need to create the mechanism by which data will be added to the database. This is done through our REST API. We will need to create an endpoint that will be used to send data to our server. Once the server receives this data then it will store the data in the database.

An endpoint is a route that our server will be listening to to get data from the browser. We already have one route that we have created already in the application and that is the route that is listening at the endpoint “/” which is the homepage of our application.

HTTP Verbs in a REST API

The communication between the client(the browser) and the server is done through an HTTP verb. The most common HTTP verbs are
GET, PUT, POST, and DELETE.

The following table explains what each HTTP verb does.

HTTP Verb Operation
GET Read
POST Create
PUT Update
DELETE Delete

As you can see from these verbs, they form the basis of CRUD operations that I talked about previously.

Building a CRUD endpoint

If you remember, the form in our index.html file used a post method to call this endpoint. We will now create this endpoint.

In our previous endpoint we used a “GET” http verb to display the index.html file. We are going to do something very similar but instead of using “GET”, we are going to use “POST”. To get started this is what the framework of our endpoint will look like.

app.post("/addname", (req, res) => {
 
});
Express Middleware

To fill out the contents of our endpoint, we want to store the firstName and lastName entered by the user into the database. The values for firstName and lastName are in the body of the request that we send to the server. We want to capture that data, convert it to JSON and store it into the database.

Express.js version 4 removed all middleware. To parse the data in the body we will need to add middleware into our application to provide this functionality. We will be using the body-parser module. We need to install it, so in your terminal window enter the following command.

npm install body-parser --save

Once it is installed, we will need to require this module and configure it. The configuration will allow us to pass the data for firstName and lastName in the body to the server. It can also convert that data into JSON format. This will be handy because we can take this formatted data and save it directly into our database.

To add the body-parser middleware to our application and configure it, we can add the following lines directly after the line that sets our port.

var bodyParser = require('body-parser');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
Saving data to database

Mongoose provides a save function that will take a JSON object and store it in the database. Our body-parser middleware, will convert the user’s input into the JSON format for us.

To save the data into the database, we need to create a new instance of our model that we created early. We will pass into this instance the user’s input. Once we have it then we just need to enter the command “save”.

Mongoose will return a promise on a save to the database. A promise is what is returned when the save to the database completes. This save will either finish successfully or it will fail. A promise provides two methods that will handle both of these scenarios.

If this save to the database was successful it will return to the .then segment of the promise. In this case we want to send text back the user to let them know the data was saved to the database.

If it fails it will return to the .catch segment of the promise. In this case, we want to send text back to the user telling them the data was not saved to the database. It is best practice to also change the statusCode that is returned from the default 200 to a 400. A 400 statusCode signifies that the operation failed.

Now putting all of this together here is what our final endpoint will look like.

app.post("/addname", (req, res) => {
  var myData = new User(req.body);
  myData.save()
    .then(item => {
      res.send("item saved to database");
    })
    .catch(err => {
      res.status(400).send("unable to save to database");
    });
});
Testing our code

Save your code. Go to your terminal and enter the command node app.js to start our server. Open up your browser and navigate to the URL “http://localhost:3000”. You will see our index.html file displayed to you.

Make sure you have mongo running.

Enter your first name and last name in the input fields and then click the “Add Name” button. You should get back text that says the name has been saved to the database like below.

Access to Code

The final version of the code is available in my Github repo. To access the code click here. Thank you for reading !