tasks 3-5

Author: GreenWizard2015

AI Backlog/03-05.md

@@ -38,3 +38,14 @@ The human in this dialogue wrote in a concise and terse manner, using shorthand
 
 The AI responded following the Laravel 7 API, but version 8 was needed. The difference in the API led to confusion and loss of time. Additionally, I decided to write the simplest (and unnecessary) tests, which led to problems in the dialogue with the AI. I concluded that it is not worth solving several tasks in one dialogue. It is better to leave the details of the implementation to Copilot AI, as the interaction on the lowest level of implementation is much more efficient. It is also very effective to shorten the message text as AI easily understands it.
 
+## 03, 04 and 05
+
+Conversation: [03-05.md](03-05.md)
+
+Task 3 turned out to be very ambiguous. At first, everything went well: I asked the AI to play the role of a programming tutor and we quickly made a work plan that was 90% implemented by Copilot AI, but then there were problems. The main reason for the problems was the inability of the AI to cover a large scope and, surprisingly, the inability of a human/myself to work in a narrow scope. For example, the AI was unable to fully understand the behavior of the frontend and backend, so it proposed a typical template, which has unnecessary things for this specific case. There were also problems with different versions of the Laravel API, but I consider this to be normal.
+
+Also, the original task description did not include any conditions for completion or specific tests that should be passed at the end. I misunderstood the task and decided that task 3 (`Create the necessary routes and controllers for handling CRUD operations for the user and country data`) included the implementation of filtering (task 4) and writing tests (task 5), which made the task much more complex.
+
+I would say that ChatGPT demonstrates a level of knowledge equivalent to students on the first/second year of education of college, but it covers a wide range of specializations. The level of knowledge is sufficient to be useful for many people, but it ultimately depends on the experience and expertise of the person that uses it.
+
+

AI Backlog/README.md

@@ -2,83 +2,20 @@
 
 namespace App\Http\Controllers;
 
-use Illuminate\Http\Request;
+use App\Models\Country;
 
 class CountryController extends Controller
 {
     /**
-     * Display a listing of the resource.
+     * return all countries and how many users are from each country as a JSON
      *
      * @return \Illuminate\Http\Response
      */
-    public function index()
+    public function all()
     {
-        //
-    }
-
-    /**
-     * Show the form for creating a new resource.
-     *
-     * @return \Illuminate\Http\Response
-     */
-    public function create()
-    {
-        //
-    }
-
-    /**
-     * Store a newly created resource in storage.
-     *
-     * @param  \Illuminate\Http\Request  $request
-     * @return \Illuminate\Http\Response
-     */
-    public function store(Request $request)
-    {
-        //
-    }
-
-    /**
-     * Display the specified resource.
-     *
-     * @param  int  $id
-     * @return \Illuminate\Http\Response
-     */
-    public function show($id)
-    {
-        //
-    }
-
-    /**
-     * Show the form for editing the specified resource.
-     *
-     * @param  int  $id
-     * @return \Illuminate\Http\Response
-     */
-    public function edit($id)
-    {
-        //
-    }
-
-    /**
-     * Update the specified resource in storage.
-     *
-     * @param  \Illuminate\Http\Request  $request
-     * @param  int  $id
-     * @return \Illuminate\Http\Response
-     */
-    public function update(Request $request, $id)
-    {
-        //
-    }
-
-    /**
-     * Remove the specified resource from storage.
-     *
-     * @param  int  $id
-     * @return \Illuminate\Http\Response
-     */
-    public function destroy($id)
-    {
-        //
+        // calculate the number of users from each country by using the Eloquent ORM
+        $countries = Country::withCount('users')->get();
+        // return the response as a JSON with the HTTP status code 200 and the header Content-Type: application/json
+        return response()->json($countries, 200);
     }
 }

backend/app/Http/Controllers/CountryController.php

@@ -4,81 +4,137 @@
 
 use Illuminate\Http\Request;
 
+/*
+ChatGPT:
+Here is a list of methods that the UserController class should have:
+
+index(): This method should handle the GET /users endpoint, it should be responsible for fetching all the records from the "users" table and returning them to the client.
+
+filter(): This method should handle the GET /users/filter?country=&from=&to= endpoint, it should be responsible for fetching all the records from the "users" table that match the provided country and date_of_birth range and returning them to the client.
+Copilot: All parameters should be optional, if the client doesn't provide a country or date_of_birth range, the method should return all the users from the database.
+
+show(): This method should handle the GET /users/{id} endpoint, it should be responsible for fetching a specific user from the "users" table and returning it to the client.
+
+update(): This method should handle the PATCH /users/{id} endpoint, it should be responsible for handling the form submission, updating a specific user in the database.
+
+destroy(): This method should handle the DELETE /users/{id} endpoint, it should be responsible for deleting a specific user from the "users" table.
+*/
+
 class UserController extends Controller
 {
-    /**
-     * Display a listing of the resource.
-     *
-     * @return \Illuminate\Http\Response
-     */
+    // GET /users - This endpoint is used to retrieve a list of all users from the database.
     public function index()
     {
-        //
+        // Get all users from the database
+        $users = \App\Models\User::all();
+        // Return the users as a JSON
+        return response()->json($users, 200);
     }
 
-    /**
-     * Show the form for creating a new resource.
-     *
-     * @return \Illuminate\Http\Response
-     */
-    public function create()
+    // GET /users/filter?country=&from=&to= - This endpoint is used to retrieve a list of all users from the database.
+    public function filter(Request $request)
     {
-        //
+        // Validate the request
+        $request->validate([
+            'country' => 'exists:countries,id',
+            'from' => 'date:Y-m-d|before_or_equal:to',
+            'to' => 'date:Y-m-d|after_or_equal:from',
+        ]);
+        // Get the country and date_of_birth range from the request
+        $country = $request->input('country');
+        $from = $request->input('from');
+        $to = $request->input('to');
+        // Filter the users based on the provided country and date_of_birth range
+        $users = \App\Models\User::when($country, function ($query, $country) {
+            return $query->where('country_id', $country);
+        })->when($from, function ($query, $from) {
+            return $query->where('date_of_birth', '>=', $from);
+        })->when($to, function ($query, $to) {
+            return $query->where('date_of_birth', '<=', $to);
+        })->get();
+        // Return the users as a JSON
+        return response()->json($users, 200);
     }
 
-    /**
-     * Store a newly created resource in storage.
-     *
-     * @param  \Illuminate\Http\Request  $request
-     * @return \Illuminate\Http\Response
-     */
-    public function store(Request $request)
-    {
-        //
-    }
-
-    /**
-     * Display the specified resource.
-     *
-     * @param  int  $id
-     * @return \Illuminate\Http\Response
-     */
+    // GET /users/{id} - This endpoint is used to retrieve a specific user from the database. The {id} path parameter should be replaced with the id of the user you want to retrieve.
     public function show($id)
     {
-        //
+        // Get the user from the database
+        $user = \App\Models\User::find($id);
+        // If the user doesn't exist, return a 404 response
+        if (!$user) {
+            return response()->json([
+                'message' => 'User not found',
+            ], 404);
+        }
+        // Return the user as a JSON
+        return response()->json($user, 200);
     }
 
-    /**
-     * Show the form for editing the specified resource.
-     *
-     * @param  int  $id
-     * @return \Illuminate\Http\Response
-     */
-    public function edit($id)
+    // PATCH /users/{id} - This endpoint is used to update a specific user in the database via a country. The {id} path parameter should be replaced with the id of the user you want to update and the client should send the updated information in the request body.
+    public function update(Request $request, $id)
     {
-        //
+        // Validate the request
+        $request->validate([
+            'first_name' => 'required|string',
+            'last_name' => 'required|string',
+            'date_of_birth' => 'required|date',
+            'country_id' => 'required|exists:countries,id',
+        ]);
+        // Get the user from the database
+        $user = \App\Models\User::find($id);
+        // If the user doesn't exist, return a 404 response
+        if (!$user) {
+            return response()->json([
+                'message' => 'User not found',
+            ], 404);
+        }
+        // Update the user
+        $user->first_name = $request->input('first_name');
+        $user->last_name = $request->input('last_name');
+        $user->date_of_birth = $request->input('date_of_birth');
+        $user->country_id = $request->input('country_id');
+        $user->save();
+        // Return the user as a JSON
+        return response()->json($user, 200);
     }
 
-    /**
-     * Update the specified resource in storage.
-     *
-     * @param  \Illuminate\Http\Request  $request
-     * @param  int  $id
-     * @return \Illuminate\Http\Response
-     */
-    public function update(Request $request, $id)
+    // DELETE /users/{id} - This endpoint is used to delete a specific user from the database. The {id} path parameter should be replaced with the id of the user you want to delete.
+    public function destroy($id)
     {
-        //
+        // Get the user from the database
+        $user = \App\Models\User::find($id);
+        // If the user doesn't exist, return a 404 response
+        if (!$user) {
+            return response()->json([
+                'message' => 'User not found',
+            ], 404);
+        }
+        // Delete the user
+        $user->delete();
+        // Return a 204 response
+        return response()->json(null, 204);
     }
 
-    /**
-     * Remove the specified resource from storage.
-     *
-     * @param  int  $id
-     * @return \Illuminate\Http\Response
-     */
-    public function destroy($id)
+    // POST /users - This endpoint is used to create a new user in the database. The client should send the user information in the request body.
+    public function store(Request $request)
     {
-        //
+        // Validate the request
+        $request->validate([
+            'first_name' => 'required|string',
+            'last_name' => 'required|string',
+            'date_of_birth' => 'required|date',
+            'country_id' => 'required|exists:countries,id',
+        ]);
+        // Create the user
+        $user = \App\Models\User::create([
+            'first_name' => $request->input('first_name'),
+            'last_name' => $request->input('last_name'),
+            'date_of_birth' => $request->input('date_of_birth'),
+            'country_id' => $request->input('country_id'),
+        ]);
+        $user->save();
+        // Return the user as a JSON
+        return response()->json($user, 201);
     }
 }

backend/app/Http/Controllers/UserController.php

@@ -63,5 +63,6 @@ class Kernel extends HttpKernel
         'signed' => \Illuminate\Routing\Middleware\ValidateSignature::class,
         'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
         'verified' => \Illuminate\Auth\Middleware\EnsureEmailIsVerified::class,
+        'errors_as_json' => \App\Http\Middleware\ErrorsAsJsonMiddleware::class,
     ];
 }

backend/app/Http/Kernel.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+
+class ErrorsAsJsonMiddleware
+{
+    /**
+     * Handle an incoming request. If the request is invalid, return the errors as JSON.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure(\Illuminate\Http\Request): (\Illuminate\Http\Response|\Illuminate\Http\RedirectResponse)  $next
+     * @return \Illuminate\Http\Response|\Illuminate\Http\RedirectResponse
+     */
+    public function handle(Request $request, Closure $next)
+    {
+        $response = $next($request);
+
+        // 'Catch' ValidationException and return the errors as JSON
+        if (!empty($response->exception)) {
+            if ($response->exception instanceof \Illuminate\Validation\ValidationException) {
+                return response()->json([
+                    'message' => 'The given data was invalid.',
+                    'errors' => $response->exception->errors(),
+                ], 422);
+            }
+        }
+
+        return $response;
+    }
+}

backend/app/Http/Middleware/ErrorsAsJsonMiddleware.php

@@ -18,6 +18,6 @@ class Country extends Model
 
     public function users()
     {
-        return $this->hasMany('App\User');
+        return $this->hasMany(User::class);
     }
 }

backend/app/Models/Country.php

@@ -14,6 +14,7 @@ class User extends Model
         'first_name',
         'last_name',
         'date_of_birth',
+        'country_id',
     ];
 
     public $timestamps = false;

backend/app/Models/User.php

@@ -26,7 +26,7 @@ class RouteServiceProvider extends ServiceProvider
      *
      * @var string|null
      */
-    // protected $namespace = 'App\\Http\\Controllers';
+    protected $namespace = 'App\\Http\\Controllers';
 
     /**
      * Define your route model bindings, pattern filters, etc.