Add Middle ware and Back end code

backend/.editorconfig

+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.{yml,yaml}]
+indent_size = 2

backend/.env

+APP_NAME=Lumen
+APP_ENV=local
+APP_KEY=
+APP_DEBUG=true
+APP_URL=http://localhost
+APP_TIMEZONE=UTC
+
+LOG_CHANNEL=stack
+LOG_SLACK_WEBHOOK_URL=
+
+DB_CONNECTION=mysql
+DB_HOST=dcsrp-db-01.cvqssef8vzgx.ap-southeast-1.rds.amazonaws.com
+DB_PORT=3306
+DB_DATABASE=dcsrp_db
+DB_USERNAME=dcsrp_db
+DB_PASSWORD=BJEutn4UT5z9Vfye6LWe7kXK
+
+JWT_SECRET=cb4cf82d320a462db851a5fccd06366b
+
+CACHE_DRIVER=file
+QUEUE_CONNECTION=sync

backend/.gitignore

+/vendor
+/.idea
+Homestead.json
+Homestead.yaml
+.phpunit.result.cache

backend/.styleci.yml

+php:
+  preset: laravel
+  disabled:
+    - unused_use
+js: true
+css: true

backend/Makefile

+default: run
+
+run:
+	php -S localhost:9595 -t public
\ No newline at end of file

backend/README.md

+# Lumen PHP Framework
+
+[![Build Status](https://travis-ci.org/laravel/lumen-framework.svg)](https://travis-ci.org/laravel/lumen-framework)
+[![Total Downloads](https://img.shields.io/packagist/dt/laravel/lumen-framework)](https://packagist.org/packages/laravel/lumen-framework)
+[![Latest Stable Version](https://img.shields.io/packagist/v/laravel/lumen-framework)](https://packagist.org/packages/laravel/lumen-framework)
+[![License](https://img.shields.io/packagist/l/laravel/lumen)](https://packagist.org/packages/laravel/lumen-framework)
+
+Laravel Lumen is a stunningly fast PHP micro-framework for building web applications with expressive, elegant syntax. We believe development must be an enjoyable, creative experience to be truly fulfilling. Lumen attempts to take the pain out of development by easing common tasks used in the majority of web projects, such as routing, database abstraction, queueing, and caching.
+
+> **Note:** In the years since releasing Lumen, PHP has made a variety of wonderful performance improvements. For this reason, along with the availability of [Laravel Octane](https://laravel.com/docs/octane), we no longer recommend that you begin new projects with Lumen. Instead, we recommend always beginning new projects with [Laravel](https://laravel.com).
+
+## Official Documentation
+
+Documentation for the framework can be found on the [Lumen website](https://lumen.laravel.com/docs).
+
+## Contributing
+
+Thank you for considering contributing to Lumen! The contribution guide can be found in the [Laravel documentation](https://laravel.com/docs/contributions).
+
+## Security Vulnerabilities
+
+If you discover a security vulnerability within Lumen, please send an e-mail to Taylor Otwell at taylor@laravel.com. All security vulnerabilities will be promptly addressed.
+
+## License
+
+The Lumen framework is open-sourced software licensed under the [MIT license](https://opensource.org/licenses/MIT).

backend/app/Console/Kernel.php

+<?php
+
+namespace App\Console;
+
+use Illuminate\Console\Scheduling\Schedule;
+use Laravel\Lumen\Console\Kernel as ConsoleKernel;
+
+class Kernel extends ConsoleKernel
+{
+    /**
+     * The Artisan commands provided by your application.
+     *
+     * @var array
+     */
+    protected $commands = [
+        //
+    ];
+
+    /**
+     * Define the application's command schedule.
+     *
+     * @param  \Illuminate\Console\Scheduling\Schedule  $schedule
+     * @return void
+     */
+    protected function schedule(Schedule $schedule)
+    {
+        //
+    }
+}

backend/app/Events/Event.php

+<?php
+
+namespace App\Events;
+
+use Illuminate\Queue\SerializesModels;
+
+abstract class Event
+{
+    use SerializesModels;
+}

backend/app/Events/ExampleEvent.php

+<?php
+
+namespace App\Events;
+
+class ExampleEvent extends Event
+{
+    /**
+     * Create a new event instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        //
+    }
+}

backend/app/Exceptions/Handler.php

+<?php
+
+namespace App\Exceptions;
+
+use Illuminate\Auth\Access\AuthorizationException;
+use Illuminate\Database\Eloquent\ModelNotFoundException;
+use Illuminate\Validation\ValidationException;
+use Laravel\Lumen\Exceptions\Handler as ExceptionHandler;
+use Symfony\Component\HttpKernel\Exception\HttpException;
+use Throwable;
+
+class Handler extends ExceptionHandler
+{
+    /**
+     * A list of the exception types that should not be reported.
+     *
+     * @var array
+     */
+    protected $dontReport = [
+        AuthorizationException::class,
+        HttpException::class,
+        ModelNotFoundException::class,
+        ValidationException::class,
+    ];
+
+    /**
+     * Report or log an exception.
+     *
+     * This is a great spot to send exceptions to Sentry, Bugsnag, etc.
+     *
+     * @param  \Throwable  $exception
+     * @return void
+     *
+     * @throws \Exception
+     */
+    public function report(Throwable $exception)
+    {
+        parent::report($exception);
+    }
+
+    /**
+     * Render an exception into an HTTP response.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Throwable  $exception
+     * @return \Illuminate\Http\Response|\Illuminate\Http\JsonResponse
+     *
+     * @throws \Throwable
+     */
+    public function render($request, Throwable $exception)
+    {
+        return parent::render($request, $exception);
+    }
+}

backend/app/Http/Controllers/AuthController.php

+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Staff;
+use Firebase\JWT\JWT;
+use Illuminate\Http\Request;
+
+class AuthController extends Controller {
+
+    public function login(Request $request) {
+
+        $User = Staff::where("email", $request->json()->get("email"))->first();
+
+        if ( $User != NULL ):
+            if ( password_verify($request->json()->get("password"), $User->password) ):
+
+                /**
+                 * Generate JWT token for the logged in user to
+                 * use in future requests to commiunicate with
+                 * backend API
+                 */
+                $jwt = JWT::encode([
+                    "sub" => $User->id,
+                    "email" => $User->email
+                ], env("JWT_SECRET"), "HS256");
+                return response()->json([ "status" => "success", "token" => $jwt ]);
+
+            else:
+                return response()->json([ "status" => "failed", "error" => "Wrong password" ]);
+            endif;
+        else:
+            return response()->json([ "status" => "failed", "error" => "No user account found" ]);
+        endif;
+
+    }
+
+}

backend/app/Http/Controllers/Controller.php

+<?php
+
+namespace App\Http\Controllers;
+
+use Laravel\Lumen\Routing\Controller as BaseController;
+
+class Controller extends BaseController {}

backend/app/Http/Controllers/HomeController.php

+<?php
+
+namespace App\Http\Controllers;
+
+class HomeController extends Controller {
+
+    public function home() {
+        return response()->json([ "status" => "success" ]);
+    }
+
+}

backend/app/Http/Controllers/TicketController.php

+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Tickets;
+use Illuminate\Http\Request;
+
+class TicketController extends Controller {
+
+
+    public function get(Request $request) {
+
+        /**
+         * Get all the tickets from database to display
+         * in the frontend. Limit and offset the records
+         * using the page number query parameter
+         */
+        $limit = ($request->query("limit")) ? $request->query("limit") : 10;
+        $page = ($request->query("page")) ? $request->query("page") : 0;
+
+        $Tickets = Tickets::with(["call"])->skip($page*$limit)->limit($limit)->orderBy("id", "desc")->get();
+
+        $data = array(
+            "tickets" => $Tickets,
+            "pagination" => array(
+                "limit" => $limit,
+                "page" => $request->query("page")
+            )
+        );
+
+        return response()->json([ "status" => "success", "data" => $data ]);
+
+    }
+
+
+    public function callback_post(Request $request) {
+
+
+
+        /**
+         * Create ticket with the information received by
+         * the middleware to initiate customer support flow
+         * from the backend application
+         */
+        Tickets::create([
+            "call_id"   => $request->json()->get("call")
+        ]);
+
+
+        return response()->json([ "status" => "success" ]);
+    }
+
+}

backend/app/Http/Middleware/Authenticate.php

+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Contracts\Auth\Factory as Auth;
+
+class Authenticate
+{
+    /**
+     * The authentication guard factory instance.
+     *
+     * @var \Illuminate\Contracts\Auth\Factory
+     */
+    protected $auth;
+
+    /**
+     * Create a new middleware instance.
+     *
+     * @param  \Illuminate\Contracts\Auth\Factory  $auth
+     * @return void
+     */
+    public function __construct(Auth $auth)
+    {
+        $this->auth = $auth;
+    }
+
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @param  string|null  $guard
+     * @return mixed
+     */
+    public function handle($request, Closure $next, $guard = null)
+    {
+        if ($this->auth->guard($guard)->guest()) {
+            return response('Unauthorized.', 401);
+        }
+
+        return $next($request);
+    }
+}

backend/app/Http/Middleware/ExampleMiddleware.php

+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+
+class ExampleMiddleware
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        return $next($request);
+    }
+}

backend/app/Jobs/ExampleJob.php

+<?php
+
+namespace App\Jobs;
+
+class ExampleJob extends Job
+{
+    /**
+     * Create a new job instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        //
+    }
+
+    /**
+     * Execute the job.
+     *
+     * @return void
+     */
+    public function handle()
+    {
+        //
+    }
+}

backend/app/Jobs/Job.php

+<?php
+
+namespace App\Jobs;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Queue\SerializesModels;
+
+abstract class Job implements ShouldQueue
+{
+    /*
+    |--------------------------------------------------------------------------
+    | Queueable Jobs
+    |--------------------------------------------------------------------------
+    |
+    | This job base class provides a central location to place any logic that
+    | is shared across all of your jobs. The trait included with the class
+    | provides access to the "queueOn" and "delay" queue helper methods.
+    |
+    */
+
+    use InteractsWithQueue, Queueable, SerializesModels;
+}

backend/app/Listeners/ExampleListener.php

+<?php
+
+namespace App\Listeners;
+
+use App\Events\ExampleEvent;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Queue\InteractsWithQueue;
+
+class ExampleListener
+{
+    /**
+     * Create the event listener.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        //
+    }
+
+    /**
+     * Handle the event.
+     *
+     * @param  \App\Events\ExampleEvent  $event
+     * @return void
+     */
+    public function handle(ExampleEvent $event)
+    {
+        //
+    }
+}

backend/app/Models/Calls.php

+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Calls extends Model {
+    protected $table = "calls";
+    protected $fillable = [ "sid", "number", "dtmf_lang", "dtmf_tracking", "recording_id", "recording_url", "transcript" ];
+    protected $dateFormat = 'U';
+}

backend/app/Models/Staff.php

+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Staff extends Model {
+    protected $table = "staff";
+    protected $fillable = [ "email", "password" ];
+    protected $hidden = [ "password" ];
+    protected $dateFormat = 'U';
+}

backend/app/Models/Tickets.php

+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Tickets extends Model {
+    protected $table = "tickets";
+    protected $fillable = [ "call_id" ];
+    protected $dateFormat = 'U';
+
+    // ASSOCIATIONS
+    public function call() { return $this->hasOne(\App\Models\Calls::class, "id", "call_id"); }
+
+}

backend/app/Providers/AppServiceProvider.php

+<?php
+
+namespace App\Providers;
+
+use Illuminate\Support\ServiceProvider;
+
+class AppServiceProvider extends ServiceProvider
+{
+    /**
+     * Register any application services.
+     *
+     * @return void
+     */
+    public function register()
+    {
+        //
+    }
+}

backend/app/Providers/AuthServiceProvider.php

+<?php
+
+namespace App\Providers;
+
+use App\Models\User;
+use Illuminate\Support\Facades\Gate;
+use Illuminate\Support\ServiceProvider;
+
+class AuthServiceProvider extends ServiceProvider
+{
+    /**
+     * Register any application services.
+     *
+     * @return void
+     */
+    public function register()
+    {
+        //
+    }
+
+    /**
+     * Boot the authentication services for the application.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        // Here you may define how you wish users to be authenticated for your Lumen
+        // application. The callback which receives the incoming request instance
+        // should return either a User instance or null. You're free to obtain
+        // the User instance via an API token or any other method necessary.
+
+        $this->app['auth']->viaRequest('api', function ($request) {
+            if ($request->input('api_token')) {
+                return User::where('api_token', $request->input('api_token'))->first();
+            }
+        });
+    }
+}

backend/app/Providers/EventServiceProvider.php

+<?php
+
+namespace App\Providers;
+
+use Laravel\Lumen\Providers\EventServiceProvider as ServiceProvider;
+
+class EventServiceProvider extends ServiceProvider
+{
+    /**
+     * The event listener mappings for the application.
+     *
+     * @var array
+     */
+    protected $listen = [
+        \App\Events\ExampleEvent::class => [
+            \App\Listeners\ExampleListener::class,
+        ],
+    ];
+
+    /**
+     * Determine if events and listeners should be automatically discovered.
+     *
+     * @return bool
+     */
+    public function shouldDiscoverEvents()
+    {
+        return false;
+    }
+}

backend/artisan

+#!/usr/bin/env php
+<?php
+
+use Symfony\Component\Console\Input\ArgvInput;
+use Symfony\Component\Console\Output\ConsoleOutput;
+
+/*
+|--------------------------------------------------------------------------
+| Create The Application
+|--------------------------------------------------------------------------
+|
+| First we need to get an application instance. This creates an instance
+| of the application / container and bootstraps the application so it
+| is ready to receive HTTP / Console requests from the environment.
+|
+*/
+
+$app = require __DIR__.'/bootstrap/app.php';
+
+/*
+|--------------------------------------------------------------------------
+| Run The Artisan Application
+|--------------------------------------------------------------------------
+|
+| When we run the console application, the current CLI command will be
+| executed in this console and the response sent back to a terminal
+| or another output device for the developers. Here goes nothing!
+|
+*/
+
+$kernel = $app->make(
+    'Illuminate\Contracts\Console\Kernel'
+);
+
+exit($kernel->handle(new ArgvInput, new ConsoleOutput));

backend/bootstrap/app.php

+ <?php
+
+require_once __DIR__.'/../vendor/autoload.php';
+
+(new Laravel\Lumen\Bootstrap\LoadEnvironmentVariables(
+    dirname(__DIR__)
+))->bootstrap();
+
+date_default_timezone_set(env('APP_TIMEZONE', 'UTC'));
+
+/*
+|--------------------------------------------------------------------------
+| Create The Application
+|--------------------------------------------------------------------------
+|
+| Here we will load the environment and create the application instance
+| that serves as the central piece of this framework. We'll use this
+| application as an "IoC" container and router for this framework.
+|
+*/
+
+$app = new Laravel\Lumen\Application(
+    dirname(__DIR__)
+);
+
+// $app->withFacades();
+
+$app->withEloquent();
+
+/*
+|--------------------------------------------------------------------------
+| Register Container Bindings
+|--------------------------------------------------------------------------
+|
+| Now we will register a few bindings in the service container. We will
+| register the exception handler and the console kernel. You may add
+| your own bindings here if you like or you can make another file.
+|
+*/
+
+$app->singleton(
+    Illuminate\Contracts\Debug\ExceptionHandler::class,
+    App\Exceptions\Handler::class
+);
+
+$app->singleton(
+    Illuminate\Contracts\Console\Kernel::class,
+    App\Console\Kernel::class
+);
+
+/*
+|--------------------------------------------------------------------------
+| Register Config Files
+|--------------------------------------------------------------------------
+|
+| Now we will register the "app" configuration file. If the file exists in
+| your configuration directory it will be loaded; otherwise, we'll load
+| the default version. You may register other files below as needed.
+|
+*/
+
+$app->configure('app');
+
+/*
+|--------------------------------------------------------------------------
+| Register Middleware
+|--------------------------------------------------------------------------
+|
+| Next, we will register the middleware with the application. These can
+| be global middleware that run before and after each request into a
+| route or middleware that'll be assigned to some specific routes.
+|
+*/
+
+// $app->middleware([
+//     App\Http\Middleware\ExampleMiddleware::class
+// ]);
+
+// $app->routeMiddleware([
+//     'auth' => App\Http\Middleware\Authenticate::class,
+// ]);
+
+/*
+|--------------------------------------------------------------------------
+| Register Service Providers
+|--------------------------------------------------------------------------
+|
+| Here we will register all of the application's service providers which
+| are used to bind services into the container. Service providers are
+| totally optional, so you are not required to uncomment this line.
+|
+*/
+
+// $app->register(App\Providers\AppServiceProvider::class);
+// $app->register(App\Providers\AuthServiceProvider::class);
+// $app->register(App\Providers\EventServiceProvider::class);
+
+/*
+|--------------------------------------------------------------------------
+| Load The Application Routes
+|--------------------------------------------------------------------------
+|
+| Next we will include the routes file so that they can all be added to
+| the application. This will provide all of the URLs the application
+| can respond to, as well as the controllers that may handle them.
+|
+*/
+
+$app->router->group([
+    'namespace' => 'App\Http\Controllers',
+], function ($router) {
+    require __DIR__.'/../routes/web.php';
+});
+
+return $app;

backend/composer.json

+{
+    "name": "laravel/lumen",
+    "description": "The Laravel Lumen Framework.",
+    "keywords": ["framework", "laravel", "lumen"],
+    "license": "MIT",
+    "type": "project",
+    "require": {
+        "php": "^8.1",
+        "firebase/php-jwt": "^6.5",
+        "laravel/lumen-framework": "^10.0"
+    },
+    "require-dev": {
+        "fakerphp/faker": "^1.9.1",
+        "mockery/mockery": "^1.4.4",
+        "phpunit/phpunit": "^10.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "App\\": "app/",
+            "Database\\Factories\\": "database/factories/",
+            "Database\\Seeders\\": "database/seeders/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Tests\\": "tests/"
+        }
+    },
+    "scripts": {
+        "post-root-package-install": [
+            "@php -r \"file_exists('.env') || copy('.env.example', '.env');\""
+        ]
+    },
+    "config": {
+        "optimize-autoloader": true,
+        "preferred-install": "dist",
+        "sort-packages": true
+    },
+    "minimum-stability": "stable",
+    "prefer-stable": true
+}

backend/database/factories/UserFactory.php

+<?php
+
+namespace Database\Factories;
+
+use App\Models\User;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+class UserFactory extends Factory
+{
+    /**
+     * The name of the factory's corresponding model.
+     *
+     * @var string
+     */
+    protected $model = User::class;
+
+    /**
+     * Define the model's default state.
+     *
+     * @return array
+     */
+    public function definition()
+    {
+        return [
+            'name' => $this->faker->name,
+            'email' => $this->faker->unique()->safeEmail,
+        ];
+    }
+}

backend/database/seeders/DatabaseSeeder.php

+<?php
+
+namespace Database\Seeders;
+
+use Illuminate\Database\Console\Seeds\WithoutModelEvents;
+use Illuminate\Database\Seeder;
+
+class DatabaseSeeder extends Seeder
+{
+    /**
+     * Run the database seeds.
+     *
+     * @return void
+     */
+    public function run()
+    {
+        // $this->call('UsersTableSeeder');
+    }
+}

backend/phpunit.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd"
+         bootstrap="vendor/autoload.php"
+         colors="true"
+>
+    <testsuites>
+        <testsuite name="Application Test Suite">
+            <directory suffix="Test.php">./tests</directory>
+        </testsuite>
+    </testsuites>
+    <php>
+        <env name="APP_ENV" value="testing"/>
+        <env name="CACHE_DRIVER" value="array"/>
+        <env name="QUEUE_CONNECTION" value="sync"/>
+    </php>
+</phpunit>

backend/public/.htaccess

+<IfModule mod_rewrite.c>
+    <IfModule mod_negotiation.c>
+        Options -MultiViews -Indexes
+    </IfModule>
+
+    RewriteEngine On
+
+    # Handle Authorization Header
+    RewriteCond %{HTTP:Authorization} .
+    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
+
+    # Redirect Trailing Slashes If Not A Folder...
+    RewriteCond %{REQUEST_FILENAME} !-d
+    RewriteCond %{REQUEST_URI} (.+)/$
+    RewriteRule ^ %1 [L,R=301]
+
+    # Handle Front Controller...
+    RewriteCond %{REQUEST_FILENAME} !-d
+    RewriteCond %{REQUEST_FILENAME} !-f
+    RewriteRule ^ index.php [L]
+</IfModule>

backend/public/index.php

+<?php
+
+/*
+|--------------------------------------------------------------------------
+| Create The Application
+|--------------------------------------------------------------------------
+|
+| First we need to get an application instance. This creates an instance
+| of the application / container and bootstraps the application so it
+| is ready to receive HTTP / Console requests from the environment.
+|
+*/
+
+$app = require __DIR__.'/../bootstrap/app.php';
+
+/*
+|--------------------------------------------------------------------------
+| Run The Application
+|--------------------------------------------------------------------------
+|
+| Once we have the application, we can handle the incoming request
+| through the kernel, and send the associated response back to
+| the client's browser allowing them to enjoy the creative
+| and wonderful application we have prepared for them.
+|
+*/
+
+$app->run();

backend/routes/web.php

+<?php
+
+/** @var \Laravel\Lumen\Routing\Router $router */
+
+/*
+|--------------------------------------------------------------------------
+| Application Routes
+|--------------------------------------------------------------------------
+|
+| Here is where you can register all of the routes for an application.
+| It is a breeze. Simply tell Lumen the URIs it should respond to
+| and give it the Closure to call when that URI is requested.
+|
+*/
+
+$router->get("/", "HomeController@home");
+
+// AUTH
+$router->post("/auth/login", "AuthController@login");
+
+// TICKETS
+$router->get("/tickets", "TicketController@get");
+
+$router->post("/callback/ticket", "TicketController@callback_post");

backend/storage/app/.gitignore

+*
+!.gitignore

backend/storage/framework/cache/.gitignore

+*
+!data/
+!.gitignore

backend/storage/framework/cache/data/.gitignore

+*
+!.gitignore

backend/storage/framework/views/.gitignore

+*
+!.gitignore

backend/storage/logs/.gitignore

+*
+!.gitignore

backend/tests/ExampleTest.php

+<?php
+
+namespace Tests;
+
+use Laravel\Lumen\Testing\DatabaseMigrations;
+use Laravel\Lumen\Testing\DatabaseTransactions;
+
+class ExampleTest extends TestCase
+{
+    /**
+     * A basic test example.
+     *
+     * @return void
+     */
+    public function test_that_base_endpoint_returns_a_successful_response()
+    {
+        $this->get('/');
+
+        $this->assertEquals(
+            $this->app->version(), $this->response->getContent()
+        );
+    }
+}

backend/tests/TestCase.php

+<?php
+
+namespace Tests;
+
+use Laravel\Lumen\Testing\TestCase as BaseTestCase;
+
+abstract class TestCase extends BaseTestCase
+{
+    /**
+     * Creates the application.
+     *
+     * @return \Laravel\Lumen\Application
+     */
+    public function createApplication()
+    {
+        return require __DIR__.'/../bootstrap/app.php';
+    }
+}

middleware/Makefile

+default: run
+
+run:
+	@go run routes.go dcsrp.go
+
+build:
+	set GOOS=linux
+	go build -o dcsrp-mw -ldflags "-s -w" -trimpath routes.go dcsrp.go
+

middleware/controllers/call/receive.go

+package call
+
+import (
+	"dcsrp/models"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/twilio/twilio-go/twiml"
+	"gorm.io/gorm"
+)
+
+func Welcome(c *gin.Context) {
+	db := c.MustGet("db").(*gorm.DB)
+
+	/**
+	* Bind incoming language selection details
+	* to variables to make decision regarding the
+	* next stages if the IVR
+	 */
+	var Request struct {
+		CallID string `form:"CallSid"`
+		From   string `form:"From"`
+	}
+	if err := c.Bind(&Request); err != nil {
+		c.AbortWithStatus(400)
+		return
+	}
+
+	/**
+	* Create relevent call tracking information in the
+	* database to retain call session inside in the
+	* application
+	 */
+	from, _ := strconv.Atoi(strings.Replace(Request.From, "+", "", 1))
+	db.Create(&models.Calls{
+		SID:    Request.CallID,
+		Number: uint64(from),
+	})
+
+	say := &twiml.VoiceSay{
+		Voice:    "women",
+		Language: "en-us",
+		Message:  "Thank you for calling Prompt Express.",
+	}
+
+	// Language
+	gather_language := &twiml.VoiceGather{
+		Input:     "dtmf",
+		Timeout:   "5",
+		NumDigits: "1",
+		Action:    "/call/receive/language",
+		Method:    "POST",
+	}
+	gather_language.InnerElements = []twiml.Element{
+		&twiml.VoiceSay{
+			Voice:    "women",
+			Language: "en-US",
+			Message:  "Press 1 for English language",
+		},
+		&twiml.VoicePause{
+			Length: "1",
+		},
+		&twiml.VoicePlay{
+			Loop: "1",
+			Url:  "https://dcsrpxyz.s3.us-west-002.backblazeb2.com/sinhala-tracking.mp3",
+		},
+	}
+
+	// RESPONSE
+	response, err := twiml.Voice([]twiml.Element{say, gather_language})
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	// RETURN
+	c.Writer.Write([]byte(response))
+
+}
+
+func Language(c *gin.Context) {
+	db := c.MustGet("db").(*gorm.DB)
+
+	/**
+	* Bind incoming language selection details
+	* to variables to make decision regarding the
+	* next stages if the IVR
+	 */
+	var Request struct {
+		CallID string `form:"CallSid"`
+		Digits uint8  `form:"Digits"`
+	}
+	if err := c.Bind(&Request); err != nil {
+		c.AbortWithStatus(400)
+		return
+	}
+
+	/**
+	* Update database with relevent DTMF code related
+	* to the choosen language
+	 */
+	db.Model(&models.Calls{}).Where("sid", Request.CallID).Update("dtmf_lang", Request.Digits)
+
+	gather_tracking := &twiml.VoiceGather{
+		Input:       "dtmf",
+		Timeout:     "5",
+		NumDigits:   "4",
+		Action:      "/call/receive/tracking",
+		Method:      "POST",
+		FinishOnKey: "#",
+	}
+	if Request.Digits == 1 {
+		gather_tracking.InnerElements = []twiml.Element{&twiml.VoiceSay{
+			Voice:    "women",
+			Language: "en-US",
+			Message:  "Please enter 4 digit package tracking number and press hash once complete",
+		}}
+	}
+
+	if Request.Digits == 2 {
+		gather_tracking.InnerElements = []twiml.Element{&twiml.VoicePlay{
+			Loop: "1",
+			Url:  "https://dcsrpxyz.s3.us-west-002.backblazeb2.com/sinhala-tracking.mp3",
+		}}
+	}
+
+	response, err := twiml.Voice([]twiml.Element{gather_tracking})
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	// RETURN
+	c.Writer.Write([]byte(response))
+}
+
+func Tracking(c *gin.Context) {
+	db := c.MustGet("db").(*gorm.DB)
+
+	/**
+	* Bind incoming language selection details
+	* to variables to make decision regarding the
+	* next stages if the IVR
+	 */
+	var Request struct {
+		CallID string `form:"CallSid"`
+		Digits uint64 `form:"Digits"`
+	}
+	if err := c.Bind(&Request); err != nil {
+		c.AbortWithStatus(400)
+		return
+	}
+
+	/**
+	* Select relevent call information from database to
+	* handle call session with correct language and update
+	* database record with tracking code
+	 */
+	var Call models.Calls
+	db.Where("sid", Request.CallID).First(&Call)
+	db.Model(&Call).Updates(models.Calls{DTMF_Tracking: Request.Digits})
+
+	var say *twiml.VoiceSay
+
+	gather_record := &twiml.VoiceRecord{
+		Action:                        "/call/receive/record",
+		Method:                        "POST",
+		PlayBeep:                      "true",
+		Transcribe:                    "false",
+		FinishOnKey:                   "#",
+		RecordingStatusCallback:       "/webhook/status/recording",
+		RecordingStatusCallbackMethod: "POST",
+		RecordingStatusCallbackEvent:  "completed",
+	}
+
+	// ENGLISH
+	if Call.DTMF_Lang == 1 {
+		say = &twiml.VoiceSay{
+			Voice:    "women",
+			Language: "en-US",
+			Message:  "Please record your question after the beep and press hash key once complete.",
+		}
+	}
+
+	// SINHALA
+	if Call.DTMF_Lang == 2 {
+		say = &twiml.VoiceSay{
+			Voice:    "women",
+			Language: "en-US",
+			Message:  "Please record your question after the beep and press hash key once complete.",
+		}
+	}
+
+	response, err := twiml.Voice([]twiml.Element{say, gather_record, &twiml.VoiceHangup{}})
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	// RETURN
+	c.Writer.Write([]byte(response))
+
+}
+
+func Record(c *gin.Context) {
+	db := c.MustGet("db").(*gorm.DB)
+
+	/**
+	* Bind incoming language selection details
+	* to variables to make decision regarding the
+	* next stages if the IVR
+	 */
+	var Request struct {
+		CallID    string `form:"CallSid"`
+		RecordID  string `form:"RecordingSid"`
+		RecordURI string `form:"RecordingUrl"`
+	}
+	if err := c.Bind(&Request); err != nil {
+		c.AbortWithStatus(400)
+		return
+	}
+
+	/**
+	* Select relevent call information from database to
+	* handle call session with correct language and update
+	* database record with tracking code
+	 */
+	var Call models.Calls
+	db.Where("sid", Request.CallID).First(&Call)
+	db.Model(&Call).Updates(models.Calls{RecordingID: Request.RecordID, RecordingURI: Request.RecordURI})
+
+	// HANGUP
+	hangup := &twiml.VoiceHangup{}
+	response, err := twiml.Voice([]twiml.Element{hangup})
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	// RETURN
+	c.Writer.Write([]byte(response))
+
+}

middleware/controllers/webhook/status.go

+package webhook
+
+import (
+	"context"
+	"dcsrp/models"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+
+	speech "cloud.google.com/go/speech/apiv1"
+	"cloud.google.com/go/speech/apiv1/speechpb"
+	"github.com/gin-gonic/gin"
+	"google.golang.org/api/option"
+	"google.golang.org/api/storage/v1"
+	"gorm.io/gorm"
+)
+
+func Recording(c *gin.Context) {
+	db := c.MustGet("db").(*gorm.DB)
+
+	/**
+	* Bind relevent information from the POST Request
+	* received from Twilio
+	 */
+	var Request struct {
+		CallID            string `form:"CallSid"`
+		RecordingChannels string `form:"RecordingChannels"`
+		RecordingDuration string `form:"RecordingDuration"`
+		RecordingID       string `form:"RecordingSid"`
+		RecordingStatus   string `form:"RecordingStatus"`
+		RecordingURI      string `form:"RecordingUrl"`
+	}
+	if err := c.Bind(&Request); err != nil {
+		c.AbortWithStatus(400)
+		return
+	}
+
+	/**
+	* Initiate GCP API client with Google Storage service
+	* and Google Speech service to further
+	* operations.
+	 */
+	ctx := context.Background()
+	storage_service, err := storage.NewService(ctx, option.WithCredentialsFile("gcp-dcsrp-svc.json"))
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	speech_client, err := speech.NewClient(ctx, option.WithCredentialsFile("gcp-dcsrp-svc.json"))
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	defer speech_client.Close()
+
+	/**
+	* Download the file from Twilio API and store in a temp
+	* location till we upload the recorded clip back to GCP
+	* storage bucket for processing.
+	 */
+	Response, err := http.Get(Request.RecordingURI)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	defer Response.Body.Close()
+
+	file, err := os.Create(fmt.Sprintf("/tmp/dcsrp-%s.wav", Request.RecordingID))
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	defer file.Close()
+
+	_, err = io.Copy(file, Response.Body)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	/**
+	* Upload downloaded voice record file to Google Cloud
+	* storage bucket
+	 */
+	file, err = os.Open(fmt.Sprintf("/tmp/dcsrp-%s.wav", Request.RecordingID))
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	defer file.Close()
+
+	object_details := &storage.Object{
+		Name:         fmt.Sprintf("recordings/dcsrp-%s.wav", Request.RecordingID),
+		CacheControl: "public, max-age=31536000",
+	}
+	_, err = storage_service.Objects.Insert("dcsrp", object_details).Media(file).Do()
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	if err := os.Remove(fmt.Sprintf("/tmp/dcsrp-%s.wav", Request.RecordingID)); err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	/**
+	* Upload voice clip to the GCP and get the response
+	* in the text format to parse from the next
+	* application
+	 */
+	speech_response, err := speech_client.Recognize(ctx, &speechpb.RecognizeRequest{
+		Config: &speechpb.RecognitionConfig{
+			Encoding:        speechpb.RecognitionConfig_LINEAR16,
+			SampleRateHertz: 8000,
+			LanguageCode:    "en-US",
+			Model:           "phone_call",
+			UseEnhanced:     true,
+		},
+		Audio: &speechpb.RecognitionAudio{
+			AudioSource: &speechpb.RecognitionAudio_Uri{
+				Uri: fmt.Sprintf("gs://dcsrp/recordings/dcsrp-%s.wav", Request.RecordingID),
+			},
+		},
+	})
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	/**
+	* Update the call information in the database
+	* with the text transcript returned from the
+	* Google cloud speech to text service
+	 */
+	db.Model(&models.Calls{}).Where("sid", Request.CallID).Update("transcript", speech_response.Results[0].Alternatives[0].Transcript)
+
+}

middleware/dcsrp.go

+package main
+
+import (
+	middleware "dcsrp/middlewares"
+
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+
+	/**
+	* We have to define the operation for go/gin router
+	* to work. By default we'll use the debug mode and
+	* this will changed to release mode on the production
+	* environments.
+	 */
+	gin.SetMode(gin.DebugMode)
+
+	/**
+	 * Here we'll create go/gin Router handler to take care about
+	 * the routing inside in the application. There will be no
+	 * middlewares in the init stage.
+	 */
+	Router := gin.New()
+
+	/**
+	 * Logger middleware will write the logs to gin.DefaultWriter
+	 * We are supposed to use some custom made Logger to make log
+	 * rotate. But this will be here for while
+	 */
+	Router.Use(gin.Logger())
+
+	/**
+	 * We have to make our application immune to unexpected 500
+	 * server side errors. This Recovery middleware will recovers
+	 * from any panics and writes a 500 if there was one.
+	 */
+	Router.Use(gin.Recovery())
+
+	/**
+	 * We need to return some CORS headers to fix issues with
+	 * cross browser requests things.
+	 */
+	Router.Use(middleware.CORS())
+
+	/**
+	 * Initialize gorm ORM instance and inject it to the main
+	 * gin application to use in the controllers.
+	 */
+	Router.Use(middleware.Database())
+
+	/**
+	 * This is where we include all the routes define in our application
+	 * into the go-gin router
+	 */
+	Routes(Router)
+
+	/**
+	 * It's time to start the go/gin Router and make it available
+	 * to our front facing application to make requests.
+	 */
+	Router.Run("127.0.0.1:9292")
+
+}

middleware/gcp-dcsrp-svc.json

+{
+  "type": "service_account",
+  "project_id": "dcsrp-386009",
+  "private_key_id": "bdbd989fe518b84e3bbde8bc177eb9e7ff04ad9d",
+  "private_key": "-----BEGIN PRIVATE KEY-----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\nFcCoQ+ToSaAibiuEHEsdnc0=\n-----END PRIVATE KEY-----\n",
+  "client_email": "dcsrp-svc@dcsrp-386009.iam.gserviceaccount.com",
+  "client_id": "115970873218942547793",
+  "auth_uri": "https://accounts.google.com/o/oauth2/auth",
+  "token_uri": "https://oauth2.googleapis.com/token",
+  "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
+  "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/dcsrp-svc%40dcsrp-386009.iam.gserviceaccount.com"
+}

middleware/go.mod

+module dcsrp
+
+go 1.20
+
+require (
+	cloud.google.com/go/speech v1.15.0
+	github.com/gin-gonic/gin v1.9.0
+	github.com/twilio/twilio-go v1.7.0
+	google.golang.org/api v0.114.0
+	gorm.io/driver/mysql v1.5.0
+	gorm.io/gorm v1.25.0
+	gorm.io/plugin/soft_delete v1.2.1
+)
+
+require (
+	cloud.google.com/go v0.110.0 // indirect
+	cloud.google.com/go/compute v1.19.0 // indirect
+	cloud.google.com/go/compute/metadata v0.2.3 // indirect
+	cloud.google.com/go/longrunning v0.4.1 // indirect
+	github.com/beevik/etree v1.1.0 // indirect
+	github.com/bytedance/sonic v1.8.0 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.11.2 // indirect
+	github.com/go-sql-driver/mysql v1.7.0 // indirect
+	github.com/goccy/go-json v0.10.0 // indirect
+	github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.2.3 // indirect
+	github.com/googleapis/gax-go/v2 v2.7.1 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.9 // indirect
+	go.opencensus.io v0.24.0 // indirect
+	golang.org/x/arch v0.0.0-20210923205945-b76863e36670 // indirect
+	golang.org/x/crypto v0.5.0 // indirect
+	golang.org/x/net v0.8.0 // indirect
+	golang.org/x/oauth2 v0.6.0 // indirect
+	golang.org/x/sys v0.6.0 // indirect
+	golang.org/x/text v0.8.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
+	google.golang.org/grpc v1.54.0 // indirect
+	google.golang.org/protobuf v1.30.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

middleware/go.sum

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middleware/middlewares/cors.go

+package middleware
+
+import (
+	"github.com/gin-gonic/gin"
+)
+
+func CORS() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
+		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, UPDATE")
+		c.Writer.Header().Set("Access-Control-Allow-Headers", "Origin, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
+		c.Writer.Header().Set("Access-Control-Expose-Headers", "Content-Length")
+		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
+
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(200)
+		} else {
+			c.Next()
+		}
+	}
+}

middleware/middlewares/database.go

+package middleware
+
+import (
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
+
+func Database() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		db, _ := gorm.Open(mysql.New(mysql.Config{
+			DSN: "dcsrp_db:BJEutn4UT5z9Vfye6LWe7kXK@tcp(dcsrp-db-01.cvqssef8vzgx.ap-southeast-1.rds.amazonaws.com:3306)/dcsrp_db?charset=utf8&parseTime=True&loc=Local",
+		}), &gorm.Config{
+			Logger: logger.Default.LogMode(logger.Info),
+		})
+
+		/**
+		* Configure SQL connection pool settings to avoid any
+		* funky things from happening with connection limites
+		 */
+		connection, _ := db.DB()
+		connection.SetConnMaxLifetime(time.Second)
+
+		c.Set("db", db)
+		c.Next()
+	}
+}

middleware/models/calls.go

+package models
+
+import (
+	"gorm.io/plugin/soft_delete"
+)
+
+type Calls struct {
+	ID            uint64                `gorm:"column:id;primaryKey"`
+	SID           string                `gorm:"column:sid"`
+	Number        uint64                `gorm:"column:number"`
+	DTMF_Lang     uint8                 `gorm:"column:dtmf_lang"`
+	DTMF_Tracking uint64                `gorm:"column:dtmf_tracking"`
+	RecordingID   string                `gorm:"column:recording_id"`
+	RecordingURI  string                `gorm:"column:recording_url"`
+	Transcript    string                `gorm:"column:transcript"`
+	CreatedAt     int64                 `gorm:"column:created_at;autoCreateTime"`
+	UpdatedAt     int64                 `gorm:"column:updated_at;autoUpdateTime"`
+	DeletedAt     soft_delete.DeletedAt `gorm:"column:deleted_at;default:null"`
+}
+
+func (Calls) TableName() string {
+	return "calls"
+}

middleware/routes.go

+package main
+
+import (
+	Call_Controller "dcsrp/controllers/call"
+	Webhook_Controller "dcsrp/controllers/webhook"
+
+	"github.com/gin-gonic/gin"
+)
+
+func Routes(Router *gin.Engine) {
+
+	Router.POST("/call/receive", Call_Controller.Language)
+	Router.POST("/call/receive/welcome", Call_Controller.Welcome)
+	Router.POST("/call/receive/language", Call_Controller.Language)
+	Router.POST("/call/receive/tracking", Call_Controller.Tracking)
+	Router.POST("/call/receive/record", Call_Controller.Record)
+
+	Router.POST("/webhook/status/recording", Webhook_Controller.Recording)
+
+	/**
+	* We have to define ping route to get health information about
+	* the Zend API to intergrate with monitoring utilities.
+	 */
+	Router.GET("/ping", func(c *gin.Context) {
+		c.AbortWithStatusJSON(200, gin.H{
+			"status":  "success",
+			"version": "1.0.0",
+		})
+	})
+
+	/*
+	* We have to show resource not found error if some
+	* application request undefined route.
+	 */
+	Router.NoRoute(func(c *gin.Context) {
+		c.AbortWithStatusJSON(404, gin.H{
+			"status": "failed",
+			"error": gin.H{
+				"code":    404,
+				"message": "Resource not found",
+			},
+		})
+	})
+
+}