feat(comments): added Get Article comments API

app/Http/Controllers/Api/V1/Article/GetCommentsController.php

@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Controllers\Api\V1\Article;
+
+use App\Http\Controllers\Controller;
+use App\Http\Requests\V1\Article\GetCommentsRequest;
+use App\Http\Resources\MetaResource;
+use App\Http\Resources\V1\Comment\CommentResource;
+use App\Models\Article;
+use App\Services\ArticleService;
+use Dedoc\Scramble\Attributes\Group;
+use Illuminate\Http\JsonResponse;
+use Symfony\Component\HttpFoundation\Response;
+
+#[Group('Comments', weight: 2)]
+class GetCommentsController extends Controller
+{
+    public function __construct(private readonly ArticleService $articleService) {}
+
+    /**
+     * Get Comments List
+     *
+     * Retrieve a paginated list of comments for an article (with 1 child level)
+     *
+     * @unauthenticated
+     *
+     * @response array{status: true, message: string, data: array{comments: CommentResource[], meta: MetaResource}}
+     */
+    public function __invoke(GetCommentsRequest $request, Article $article): JsonResponse
+    {
+        $params = $request->withDefaults();
+
+        try {
+            $parentId = $params['parent_id'] !== null ? (int) $params['parent_id'] : null;
+
+            $commentsDataResponse = CommentResource::collection($this->articleService->getArticleComments(
+                $article->id,
+                $parentId,
+                (int) $params['per_page'],
+                (int) $params['page']
+            ));
+            /** @var array{data: array, meta: array} $commentsData */
+            $commentsData = $commentsDataResponse->response()->getData(true);
+
+            return response()->apiSuccess(
+                [
+                    'comments' => $commentsData['data'],
+                    'meta' => MetaResource::make($commentsData['meta']),
+                ],
+                __('common.success')
+            );
+        } catch (\Throwable $e) {
+            return response()->apiError(
+                __('common.something_went_wrong'),
+                Response::HTTP_INTERNAL_SERVER_ERROR
+            );
+        }
+    }
+}

app/Http/Requests/V1/Article/GetCommentsRequest.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Requests\V1\Article;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class GetCommentsRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function rules(): array
+    {
+        return [
+            'per_page' => 'integer|min:1|max:100',
+            'page' => 'integer|min:1',
+            'parent_id' => 'nullable|integer|exists:comments,id',
+        ];
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function withDefaults(): array
+    {
+        return [
+            'per_page' => $this->input('per_page', 10),
+            'page' => $this->input('page', 1),
+            'parent_id' => $this->input('parent_id'),
+        ];
+    }
+}

app/Http/Resources/V1/Comment/CommentResource.php

@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Resources\V1\Comment;
+
+use App\Http\Resources\V1\Auth\UserResource;
+use App\Models\Comment;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+/**
+ * @mixin Comment
+ */
+class CommentResource extends JsonResource
+{
+    /**
+     * Transform the resource into an array.
+     *
+     * @param  Request  $request
+     * @return array<string, mixed>
+     */
+    public function toArray($request): array
+    {
+        return [
+            'id' => $this->id,
+            'user' => new UserResource($this->whenLoaded('user')),
+            'content' => $this->content,
+            'created_at' => $this->created_at,
+            'replies_count' => $this->replies_count,
+            'replies' => CommentResource::collection($this->whenLoaded('replies_page')),
+        ];
+    }
+}

app/Models/Comment.php

@@ -14,6 +14,8 @@
  * @property int $user_id
  * @property string $content
  * @property int|null $parent_comment_id
+ * @property-read int $replies_count
+ * @property-read \Illuminate\Database\Eloquent\Collection<int, \App\Models\Comment>|null $replies_page
  *
  * @mixin \Eloquent
  *
@@ -54,10 +56,12 @@ public function user(): BelongsTo
     }
 
     /**
-     * @return BelongsTo<Comment,Comment>
+     * Get the replies (child comments) for this comment.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany<\App\Models\Comment, Comment>
      */
-    public function parent(): BelongsTo
+    public function replies(): \Illuminate\Database\Eloquent\Relations\HasMany
     {
-        return $this->belongsTo(Comment::class, 'parent_comment_id');
+        return $this->hasMany(Comment::class, 'parent_comment_id');
     }
 }

app/Services/ArticleService.php

@@ -6,6 +6,7 @@
 
 use App\Models\Article;
 use App\Models\Category;
+use App\Models\Comment;
 use App\Models\Tag;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Pagination\LengthAwarePaginator;
@@ -145,4 +146,53 @@ public function getAllTags()
     {
         return Tag::query()->get(['id', 'name', 'slug']);
     }
+
+    /**
+     * Get paginated comments for an article (with 1 child level or for a parent comment).
+     *
+     * Loads the comment's user, count of replies, and top replies (limited by $repliesPerPage).
+     *
+     * @param  int  $articleId  The ID of the article.
+     * @param  int|null  $parentId  The ID of the parent comment (if loading child comments).
+     * @param  int  $perPage  Number of parent comments per page.
+     * @param  int  $page  Current page number.
+     * @param  int  $repliesPerPage  Number of child comments per parent.
+     * @return \Illuminate\Contracts\Pagination\LengthAwarePaginator<int, \App\Models\Comment>
+     */
+    public function getArticleComments(
+        int $articleId,
+        ?int $parentId = null,
+        int $perPage = 10,
+        int $page = 1,
+        int $repliesPerPage = 3
+    ): \Illuminate\Contracts\Pagination\LengthAwarePaginator {
+        $query = Comment::query()
+            ->where('article_id', $articleId)
+            ->when($parentId !== null, fn ($q) => $q->where('parent_comment_id', $parentId))
+            ->when($parentId === null, fn ($q) => $q->whereNull('parent_comment_id'))
+            ->orderBy('created_at');
+
+        $paginator = $query->paginate($perPage, ['*'], 'page', $page);
+
+        /** @var \Illuminate\Database\Eloquent\Collection<int, \App\Models\Comment> $comments */
+        $comments = $paginator->getCollection();
+
+        $comments->load(['user']);
+        $comments->loadCount('replies');
+
+        // Load replies for each parent comment
+        $comments->each(function (Comment $comment) use ($repliesPerPage) {
+            $replies = $comment->replies()
+                ->with('user')
+                ->withCount('replies')
+                ->orderBy('created_at')
+                ->limit($repliesPerPage)
+                ->get();
+
+            $comment->setRelation('replies_page', $replies);
+        });
+
+        // Replace the collection on paginator so it's returned with relations loaded
+        return $paginator->setCollection($comments);
+    }
 }

database/seeders/ArticleCommentSeeder.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Database\Seeders;
+
+use App\Models\Article;
+use App\Models\Comment;
+use App\Models\User;
+use Illuminate\Database\Seeder;
+
+class ArticleCommentSeeder extends Seeder
+{
+    /**
+     * Run this seeder for API testing purpose only.
+     * NOTE: DON'T RUN THIS IN PRODUCTION, this is for testing purposes only.
+     */
+    public function run(): void
+    {
+        // Create 10 users for comments
+        $users = User::factory(10)->create();
+
+        // Create 20 categories and 30 tags
+        $categories = \App\Models\Category::factory(20)->create();
+        $tags = \App\Models\Tag::factory(30)->create();
+
+        // Create 100 articles
+        $articles = Article::factory(100)->create();
+
+        foreach ($articles as $article) {
+            // Attach 1-3 random categories to each article
+            $article->categories()->attach($categories->random(rand(1, 3))->pluck('id')->toArray());
+            // Attach 2-5 random tags to each article
+            $article->tags()->attach($tags->random(rand(2, 5))->pluck('id')->toArray());
+
+            // Create 10 top-level comments for each article
+            $topComments = [];
+            for ($i = 0; $i < 10; $i++) {
+                $topComments[$i] = Comment::factory()->create([
+                    'article_id' => $article->id,
+                    'user_id' => $users->random()->id,
+                    'parent_comment_id' => null,
+                ]);
+            }
+            // For each top-level comment, create 2 child comments (level 1)
+            foreach ($topComments as $parentComment) {
+                for ($j = 0; $j < 2; $j++) {
+                    $child = Comment::factory()->create([
+                        'article_id' => $article->id,
+                        'user_id' => $users->random()->id,
+                        'parent_comment_id' => $parentComment->id,
+                    ]);
+                    // For each child comment, create 2 more child comments (level 2)
+                    for ($k = 0; $k < 2; $k++) {
+                        Comment::factory()->create([
+                            'article_id' => $article->id,
+                            'user_id' => $users->random()->id,
+                            'parent_comment_id' => $child->id,
+                        ]);
+                    }
+                }
+            }
+        }
+    }
+}

routes/api_v1.php

@@ -23,6 +23,7 @@
     Route::prefix('articles')->group(function () {
         Route::get('/', \App\Http\Controllers\Api\V1\Article\GetArticlesController::class)->name('api.v1.articles.index');
         Route::get('/{slug}', \App\Http\Controllers\Api\V1\Article\ShowArticleController::class)->name('api.v1.articles.show');
+        Route::get('/{article:slug}/comments', \App\Http\Controllers\Api\V1\Article\GetCommentsController::class)->name('api.v1.articles.comments.index');
     });
 
     // Category Routes (Public)