Implement file upload and viewing functionality; refactor letter migrations and models to use UUIDs

app/Models/FileUpload.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Concerns\HasUuids;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Str;
+
+class FileUpload extends Model
+{
+    use HasFactory, HasUuids;
+
+    protected $table = 'file_uploads';
+    protected $keyType = 'string';
+    public $incrementing = false;
+
+    protected $fillable = ['letter_id', 'file_name', 'file_path', 'mime_type'];
+
+    protected static function boot()
+    {
+        parent::boot();
+        static::creating(function ($model) {
+            $model->id = Str::uuid()->toString();
+        });
+    }
+}

app/Models/Letter.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Concerns\HasUuids;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Str;
+
+class Letter extends Model
+{
+    use HasFactory, HasUuids;
+
+    protected $table = 'letters';
+    protected $keyType = 'string';
+    public $incrementing = false;
+
+    protected $fillable = [
+        'nama_mahasiswa',
+        'nomor_induk_mahasiswa',
+        'program_studi_mahasiswa',
+        'tahun_ajaran',
+        'start_date',
+        'completion_date',
+        'lampiran',
+        'is_acceptance',
+        'nomor_surat_acceptance',
+        'is_completion',
+        'nomor_surat_completion',
+    ];
+
+    protected static function boot()
+    {
+        parent::boot();
+        static::creating(function ($model) {
+            $model->id = Str::uuid()->toString();
+        });
+    }
+
+    public function fileUpload()
+    {
+        return $this->hasOne(FileUpload::class, 'letter_id', 'id');
+    }
+}

app/Models/User.php

@@ -6,6 +6,7 @@ namespace App\Models;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
+use Illuminate\Support\Str;
 use Laravel\Sanctum\HasApiTokens;
 
 class User extends Authenticatable
@@ -46,4 +47,15 @@ class User extends Authenticatable
             'password' => 'hashed',
         ];
     }
+
+    protected $keyType = 'string';
+    public $incrementing = false;
+
+    public static function boot() {
+        parent::boot();
+
+        static::creating(function ($model) {
+            $model->id = Str::uuid();
+        });
+    }
 }