Initial commit: Laravel Blog API

app/Models/Post.php

@@ -0,0 +1,100 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Support\Str;
+
+class Post extends Model
+{
+    use HasFactory;
+
+    public const STATUS_DRAFT = 'draft';
+    public const STATUS_PUBLISHED = 'published';
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array<int, string>
+     */
+    protected $fillable = [
+        'title',
+        'slug',
+        'content',
+        'excerpt',
+        'category_id',
+        'featured_image',
+        'is_featured',
+        'status',
+        'published_at',
+    ];
+
+    /**
+     * The attributes that should be cast.
+     *
+     * @return array<string, string>
+     */
+    protected function casts(): array
+    {
+        return [
+            'is_featured' => 'boolean',
+            'published_at' => 'datetime',
+        ];
+    }
+
+    /**
+     * Boot the model and register model events.
+     */
+    protected static function booted(): void
+    {
+        static::creating(function (Post $post): void {
+            if (blank($post->slug)) {
+                $post->slug = static::generateUniqueSlug($post->title);
+            }
+        });
+
+        static::updating(function (Post $post): void {
+            if ($post->isDirty('title') && blank($post->slug)) {
+                $post->slug = static::generateUniqueSlug($post->title, $post->id);
+            }
+        });
+    }
+
+    /**
+     * Get the category that owns the post.
+     */
+    public function category(): BelongsTo
+    {
+        return $this->belongsTo(Category::class);
+    }
+
+    /**
+     * Generate a unique slug based on the post title.
+     */
+    public static function generateUniqueSlug(string $title, ?int $ignoreId = null): string
+    {
+        $baseSlug = Str::slug($title);
+        $slug = $baseSlug;
+        $counter = 1;
+
+        while (static::query()
+            ->where('slug', $slug)
+            ->when($ignoreId, fn ($query) => $query->whereKeyNot($ignoreId))
+            ->exists()) {
+            $slug = "{$baseSlug}-{$counter}";
+            $counter++;
+        }
+
+        return $slug;
+    }
+
+    /**
+     * Determine whether the post is published.
+     */
+    public function isPublished(): bool
+    {
+        return $this->status === self::STATUS_PUBLISHED;
+    }
+}