Laravel Posts

You can watch the following tutorial and you can continue reading this article.

Follow the Steps given here for setup push notification.

Step 1: You can quickly install Push via npm

npm install push.js --save

Step 2: Update webpack.mix.js

Add following code into webpack.mix.js for copy and publish assets like js in the public directory. you can see the example here

mix.copy('node_modules/push.js/bin/push.min.js',
    'public/assets/js/push.min.js');

I hope you know how to use laravel mix. you can watch this video tutorial if you want to know more about the laravel mix.

fire, npm run dev command and publish js.

Step 3: Add assets in blade file

Add script before closing body tag.

<script src="{{ asset('assets/js/push.min.js') }}"></script>

Step 4: Add this code where you want to show a push

// add logo in public dir and use it here
const iconPath = '{{ asset('logo.PNG') }}
 Push.create("Hello Shailesh!",{
       body: "Welcome to the Dashboard.",
       timeout: 5000,
       icon: iconPath
});

Nowadays multi-tenant applications are more useful than single-tenant applications. We can use multi-tenant with multiple databases or single databases as per our need. But it's better to use a single DB with a multi-tenant when you have a small application.

In this tutorial, we are going to use multi-tenant with a single database.

We will implement multi-tenant with single DB by using the following package: https://github.com/archtechx/tenancy

Assuming you already have Laravel 8 repo setup. Now please follow the given steps to implement multi-tenancy with a single DB.

Package Installation

Run following commands :

1. composer require stancl/tenancy

2. php artisan tenancy:install

3. php artisan migrate

Add following service provider to config/app.php

App\Providers\TenancyServiceProvider::class

Create Custom Model

Now create modal named MultiTenant into app\Models

MultiTenant.php

 SavingTenant::class,
        'saved'    => TenantSaved::class,
        'creating' => CreatingTenant::class,
        //        'created' => TenantCreated::class,
        'updating' => UpdatingTenant::class,
        'updated'  => TenantUpdated::class,
        'deleting' => DeletingTenant::class,
        'deleted'  => TenantDeleted::class,
    ];
}

Update Tenancy Configuration

As we have added custom model we also need to define that model into config/tenancy.php

Please change tenant_model value to our custom model.

'tenant_model' => \App\Models\MultiTenant::class,

Add Resolver

To use multi tenant with single DB we also need to add our customer resolver, that will be used into Middlewares that we will create ahead.

Create MultiTenantResolver into app\Resolvers

App\Resolvers\MultiTenantResolver.php

find(Auth::user()->tenant_id)) {
            return $tenant;
        }

        throw new TenantCouldNotBeIdentifiedByPathException($id);
    }

    public function getArgsForTenant(Tenant $tenant): array
    {
        return [
            [$tenant->id],
        ];
    }
}

Add Middleware

We will create our custom middleware that will set the current tenant into cache, and that will used by package to fire default query where('tenant_id', "tenant id we have set into middleware")

App\Http\Middleware\MultiTenantMiddleware.php

tenancy = $tenancy;
        $this->resolver = $resolver;
    }

    /**
     * Handle an incoming request.
     *
     * @param  Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        $tenant = Auth::user()->tenant_id;

        return $this->initializeTenancy(
            $request, $next, $tenant
        );
    }
}

Also, don't forget to add middleware alias into App\Http\kernel.php

 protected $routeMiddleware = [
        ..............
        'multi_tenant' => MultiTenantMiddleware::class,
];

Now we will apply this multi_tenant middleware to our routes.

Add Trait to tenant-specific models

We have to add BelongsToTenant trait to all of our tenant-specific models.

Say if we want to add tenant_id into the users table then we must have to add BelongsToTenant to the app\Models\User model.

That trait will by default add following query everytime when we will try to fetch records or update records.

Where('tenant_id', 'tenant id will taken from cache')

Add tenant_id to tenant-specific migrations

As we have added the tenant trait, we must have to add tenant_id into tenant-specific migrations as specified below.

public function up()
    {
        Schema::create('users', function (Blueprint $table) {
            ...........................

            $table->string('tenant_id');

            $table->foreign('tenant_id')
                ->references('id')
                ->on('tenants')
                ->onUpdate('cascade')
                ->onDelete('cascade');

            $table->timestamps();
        });

Update TenancyServiceProvider

Replace the App\Providers\TenactServiceProvider by the following code.

 [],
            Events\TenantCreated::class => [
                JobPipeline::make([
                    Jobs\CreateDatabase::class,
                    Jobs\MigrateDatabase::class,
                    // Jobs\SeedDatabase::class,

                    // Your own jobs to prepare the tenant.
                    // Provision API keys, create S3 buckets, anything you want!

                ])->send(function (Events\TenantCreated $event) {
                    return $event->tenant;
                })->shouldBeQueued(false), // `false` by default, but you probably want to make this `true` for production.
            ],
            Events\SavingTenant::class => [],
            Events\TenantSaved::class => [],
            Events\UpdatingTenant::class => [],
            Events\TenantUpdated::class => [],
            Events\DeletingTenant::class => [],
            Events\TenantDeleted::class => [
                JobPipeline::make([
                    Jobs\DeleteDatabase::class,
                ])->send(function (Events\TenantDeleted $event) {
                    return $event->tenant;
                })->shouldBeQueued(false), // `false` by default, but you probably want to make this `true` for production.
            ],

            // Domain events
            Events\CreatingDomain::class => [],
            Events\DomainCreated::class => [],
            Events\SavingDomain::class => [],
            Events\DomainSaved::class => [],
            Events\UpdatingDomain::class => [],
            Events\DomainUpdated::class => [],
            Events\DeletingDomain::class => [],
            Events\DomainDeleted::class => [],

            // Database events
            Events\DatabaseCreated::class => [],
            Events\DatabaseMigrated::class => [],
            Events\DatabaseSeeded::class => [],
            Events\DatabaseRolledBack::class => [],
            Events\DatabaseDeleted::class => [],

            // Tenancy events
            Events\InitializingTenancy::class => [],
            Events\TenancyInitialized::class => [
//                Listeners\BootstrapTenancy::class,
            ],

            Events\EndingTenancy::class => [],
            Events\TenancyEnded::class => [
                Listeners\RevertToCentralContext::class,
            ],

            Events\BootstrappingTenancy::class => [],
            Events\TenancyBootstrapped::class => [],
            Events\RevertingToCentralContext::class => [],
            Events\RevertedToCentralContext::class => [],

            // Resource syncing
            Events\SyncedResourceSaved::class => [
                Listeners\UpdateSyncedResource::class,
            ],

            // Fired only when a synced resource is changed in a different DB than the origin DB (to avoid infinite loops)
            Events\SyncedResourceChangedInForeignDatabase::class => [],
        ];
    }

    public function register()
    {
        //
    }

    public function boot()
    {
        $this->bootEvents();
//        $this->mapRoutes();

        $this->makeTenancyMiddlewareHighestPriority();
    }

    protected function bootEvents()
    {
        foreach ($this->events() as $event => $listeners) {
            foreach (array_unique($listeners) as $listener) {
                if ($listener instanceof JobPipeline) {
                    $listener = $listener->toListener();
                }

                Event::listen($event, $listener);
            }
        }
    }

    protected function mapRoutes()
    {
        if (file_exists(base_path('routes/tenant.php'))) {
            Route::namespace(static::$controllerNamespace)
                ->group(base_path('routes/tenant.php'));
        }
    }

    protected function makeTenancyMiddlewareHighestPriority()
    {
        $tenancyMiddleware = [
            // Even higher priority than the initialization middleware
            Middleware\PreventAccessFromCentralDomains::class,

            Middleware\InitializeTenancyByDomain::class,
            Middleware\InitializeTenancyBySubdomain::class,
            Middleware\InitializeTenancyByDomainOrSubdomain::class,
            Middleware\InitializeTenancyByPath::class,
            Middleware\InitializeTenancyByRequestData::class,
        ];

        foreach (array_reverse($tenancyMiddleware) as $middleware) {
            $this->app[\Illuminate\Contracts\Http\Kernel::class]->prependToMiddlewarePriority($middleware);
        }
    }
}

Create / Fetch Tenant

Now we have to create a tenant and give that tenant_id to related users.

each user contains their specific tenant_id.

Use the following code to create a tenant :

 $tenant1 = \App\Models\MultiTenant::create([
     'name' => 'Tenant 1'
 ]);

 $tenant2 = \App\Models\MultiTenant::create([
     'name' => 'Tenant 2'
  ]);

That will create tenant into tenants table and values will be stored into data column as a son.

$tenant1 = App\Models\MultiTenant::where('data->name', 'Tenant 1')->first();

$tenant2 = App\Models\MultiTenant::where('data->name', 'Tenant 2')->first();

$tenant1User = User::where('id', 'user id here')->update(['tenant_id' => $tenant1->id]);

$tenant2User = User::where('id', 'user id here')->update(['tenant_id' => $tenant2->id]);

Now we have 2 tenants with 2 separate users who contain separate tenant ids.

Add Middleware to Routes

Now do login with User 1 and try to fetch all users from the database, it will return users of logged-in users' tenants only.

As we have the BelongToTenant trait into the User model.

Route::group(['middleware' => ['auth', 'multi_tenant']], function () { Route::get('users', function() {

 // only tenant-1 users will be returned because we are setting the logged-in user tenant into the cache from `multi_tenant`middleware.
 $allUsers = User::all();
});

});

You can use the same for other models too.

Hope this helps you.

In this article, I show you how to set up react application in Laravel Framework. as you know react is a very flexible frontend library and works with together any backend framework, so let start and follow the following steps. I hope you have created the laravel application.

You can watch the following video tutorial or follow this article as well,

Step 1:

Let's go to the resource directory in laravel. now let's create react application. you should watch the following tutorial if you don't know how to create react application.

Step 2:

Merge the package.json and package-lock.json files in the root. fire npm install && npm run dev command in terminal for compile react application to js.

Step 3:

In this step, you need to set up a webpack.mix.js file. put the following code in the webpack.mix.js file.

mix.options({
  postCss: [
      require('autoprefixer'),
  ],
});

mix.setPublicPath('public');

mix.webpackConfig({
  resolve: {
      extensions: ['.js', '.vue'],
      alias: {
          '@': __dirname + 'resources'
      }
  },
  output: {
      chunkFilename: 'js/chunks/[name].js',
  },
}).react();

// used to run app using reactjs
mix.js('resources/react-app/src/index.js', 'public/js/app.js').version();
mix.copy('resources/react-app/public', 'public');

NOTE: Don't forget to change the index.js path based on your application name

Step 4:

Let's add <div id="root"></div> to your application's root blade file

Step 5:

Let's inlude <script type="text/javascript" src="{{ mix('js/app.js') }}"></script> to your application's root blade file before end the body tag.

So, the Basic setup is done. enjoy react with laravel.

Generally, we are using a Laravel One Signal package for push notification. if you are planning to use one signal in the mobile application then this package right for you.

Recently, I add a new feature UserDevice. let me explain why I added support for user Device APIs.

We need to create an API to register a device because One Signal sends a push notification using os player id. so, we need to store os_player_id in the backend from the mobile application. So, need to create an API for it.

Now. you can save your time using this package. you can Generate APIs using one artisan command,

php artisan one-signal.userDevice:publish

This command generates the following files,

• UserDeviceAPIController
• UserDeviceAPIRepository
• UserDevice (model)
• Migration So, everything is ready in minutes and delivered an API on the spot.

Also, do not forget to add the following routes to the api.php file.

use App\Http\Controllers\API\UserDeviceAPIController;

Route::post('user-device/register', [UserDeviceAPIController::class, 'registerDevice']);
Route::get('user-device/{playerId}/update-status', [UserDeviceAPIController::class, 'updateNotificationStatus'])

People nowadays are becoming more intelligent, so better to protect our application's content/data from those who are calling themself hackers.

$s3 = \Storage::disk(config('filesystems.s3_protected_disk'));
$client = $s3->getDriver()->getAdapter()->getClient();
$expiry = "+1 minutes";
$command = $client->getCommand('GetObject', [
  'Bucket' => \Config::get('filesystems.disks. s3_protected_disk.bucket'),
      'Key'    => 'Path to your file',
    ]);
$request = $client->createPresignedRequest($command, $expiry);
    return (string) $request->getUrl();

https://pre-signed.s3.au-west-2.amazonaws.com/image.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=xxxxxxxx%2F20180210%2Feu-west-2%2Fs3%2Faws4_request&X-Amz-Date=20210210T171315Z&X-Amz-Expires=60&X-Amz-Signature=xxxxxxxx&X-Amz-SignedHeaders=host

Today we are going to see how we can image based on resolution. We have the most common issue of loading big images in small devices take time. So, the basic solution is to use the picture element to load a different image in different devices and resolutions.

<picture>
    <source media="(min-width:900px)" srcset="infyom_logo_lg.jpg">
    <source media="(min-width:700px)" srcset="infyom_logo_md.jpg">
    <source media="(min-width:500px)" srcset="infyom_logo_sm.jpg">
    <img src="infyom_logo_xl.jpg" alt="Flowers" style="width:auto;">
</picture>

Lots of developers have a question: How do I create a global gitignore file? so, In this article, I show how to set up a global git ignore.

git config --global core.excludesFile '~/.gitignore'

git config --global core.excludesFile "%USERPROFILE%\.gitignore"

git config --global core.excludesFile "$Env:USERPROFILE\.gitignore"