implement uploading file

app/Models/Message.php

@@ -5,8 +5,9 @@ namespace App\Models;
 use Database\Factories\MessageFactory;
 use Illuminate\Database\Eloquent\Attributes\Fillable;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
-use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Support\Number;
 
 #[Fillable(['conversation_id', 'user_id', 'type', 'body', 'metadata', 'edited_at'])]
 class Message extends Model
@@ -16,6 +17,8 @@ class Message extends Model
 
     public const string TypeText = 'text';
 
+    public const string TypeFile = 'file';
+
     /**
      * @return array<string, string>
      */
@@ -50,4 +53,51 @@ class Message extends Model
     {
         return $this->belongsTo(User::class);
     }
+
+    public function isFile(): bool
+    {
+        return $this->type === self::TypeFile;
+    }
+
+    public function attachmentDisk(): string
+    {
+        return (string) data_get($this->metadata, 'disk', 'local');
+    }
+
+    public function attachmentPath(): ?string
+    {
+        $path = data_get($this->metadata, 'path');
+
+        return is_string($path) && $path !== '' ? $path : null;
+    }
+
+    public function attachmentName(): string
+    {
+        $name = data_get($this->metadata, 'original_name');
+
+        if (is_string($name) && $name !== '') {
+            return $name;
+        }
+
+        return $this->body ?: __('Attachment');
+    }
+
+    public function attachmentMimeType(): ?string
+    {
+        $mimeType = data_get($this->metadata, 'mime_type');
+
+        return is_string($mimeType) && $mimeType !== '' ? $mimeType : null;
+    }
+
+    public function attachmentSize(): int
+    {
+        return (int) data_get($this->metadata, 'size', 0);
+    }
+
+    public function formattedAttachmentSize(): string
+    {
+        $size = $this->attachmentSize();
+
+        return $size > 0 ? Number::fileSize($size) : __('Unknown size');
+    }
 }