Tasks Module Stage 3: Attachments

- Add migration for task_attachments table
- Create TaskAttachmentModel with file handling methods
- Add TaskService methods for upload/delete attachments
- Add API routes for attachments (upload, delete, download)
- Add controller methods for attachment operations
- Add UI section in task view with file upload form
- Add JavaScript handlers for AJAX file operations

app/Modules/Tasks/Services/TaskService.php

@@ -6,6 +6,7 @@ use App\Modules\Tasks\Models\TaskModel;
 use App\Modules\Tasks\Models\TaskAssigneeModel;
 use App\Modules\Tasks\Models\TaskColumnModel;
 use App\Modules\Tasks\Models\TaskSubtaskModel;
+use App\Modules\Tasks\Models\TaskAttachmentModel;
 use CodeIgniter\Events\Events;
 
 class TaskService
@@ -14,6 +15,7 @@ class TaskService
     protected TaskAssigneeModel $assigneeModel;
     protected TaskColumnModel $columnModel;
     protected TaskSubtaskModel $subtaskModel;
+    protected TaskAttachmentModel $attachmentModel;
 
     public function __construct()
     {
@@ -21,6 +23,7 @@ class TaskService
         $this->assigneeModel = new TaskAssigneeModel();
         $this->columnModel = new TaskColumnModel();
         $this->subtaskModel = new TaskSubtaskModel();
+        $this->attachmentModel = new TaskAttachmentModel();
     }
 
     /**
@@ -180,6 +183,8 @@ class TaskService
         $task['subtasks'] = $this->subtaskModel->getByTask($taskId);
         $task['subtasks_count'] = count($task['subtasks']);
         $task['subtasks_completed'] = count(array_filter($task['subtasks'], fn($s) => $s['is_completed']));
+        $task['attachments'] = $this->attachmentModel->getByTask($taskId);
+        $task['attachments_count'] = count($task['attachments']);
 
         return $task;
     }
@@ -349,4 +354,64 @@ class TaskService
 
         return $result;
     }
+
+    // ========== Вложения (Attachments) ==========
+
+    /**
+     * Загрузить вложение
+     */
+    public function uploadAttachment(int $taskId, array $file, int $userId): ?int
+    {
+        $uploadPath = WRITEPATH . 'uploads/tasks/' . $taskId . '/';
+        
+        // Создаём директорию если не существует
+        if (!is_dir($uploadPath)) {
+            mkdir($uploadPath, 0755, true);
+        }
+
+        // Генерируем уникальное имя файла
+        $originalName = $file['name'];
+        $extension = pathinfo($originalName, PATHINFO_EXTENSION);
+        $newFileName = uniqid() . '_' . time() . '.' . $extension;
+        $filePath = $uploadPath . $newFileName;
+
+        // Перемещаем загруженный файл
+        if (!move_uploaded_file($file['tmp_name'], $filePath)) {
+            return null;
+        }
+
+        $attachmentId = $this->attachmentModel->insert([
+            'task_id' => $taskId,
+            'file_name' => $originalName,
+            'file_path' => $filePath,
+            'file_size' => $file['size'],
+            'file_type' => $file['type'] ?? '',
+            'uploaded_by' => $userId,
+        ]);
+
+        if ($attachmentId) {
+            Events::trigger('task.attachment_uploaded', $taskId, $attachmentId, $userId);
+        }
+
+        return $attachmentId;
+    }
+
+    /**
+     * Удалить вложение
+     */
+    public function deleteAttachment(int $taskId, int $attachmentId, int $userId): bool
+    {
+        $attachment = $this->attachmentModel->find($attachmentId);
+        if (!$attachment || $attachment['task_id'] != $taskId) {
+            return false;
+        }
+
+        $result = $this->attachmentModel->deleteAttachment($attachmentId, $userId);
+
+        if ($result) {
+            Events::trigger('task.attachment_deleted', $taskId, $attachmentId, $userId);
+        }
+
+        return $result;
+    }
 }