Initial commit: Laravel Blog API

app/Models/Category.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Str;
+
+class Category extends Model
+{
+    use HasFactory;
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array<int, string>
+     */
+    protected $fillable = [
+        'name',
+        'slug',
+        'description',
+    ];
+
+    /**
+     * Boot the model and register model events.
+     */
+    protected static function booted(): void
+    {
+        static::creating(function (Category $category): void {
+            if (blank($category->slug)) {
+                $category->slug = static::generateUniqueSlug($category->name);
+            }
+        });
+
+        static::updating(function (Category $category): void {
+            if ($category->isDirty('name') && blank($category->slug)) {
+                $category->slug = static::generateUniqueSlug($category->name, $category->id);
+            }
+        });
+    }
+
+    /**
+     * Get the posts associated with the category.
+     */
+    public function posts(): HasMany
+    {
+        return $this->hasMany(Post::class);
+    }
+
+    /**
+     * Generate a unique slug based on the category name.
+     */
+    public static function generateUniqueSlug(string $name, ?int $ignoreId = null): string
+    {
+        $baseSlug = Str::slug($name);
+        $slug = $baseSlug;
+        $counter = 1;
+
+        while (static::query()
+            ->where('slug', $slug)
+            ->when($ignoreId, fn ($query) => $query->whereKeyNot($ignoreId))
+            ->exists()) {
+            $slug = "{$baseSlug}-{$counter}";
+            $counter++;
+        }
+
+        return $slug;
+    }
+}