Tasks Module Stage 3: Checklists

- Add migration for task_checklists table
- Create TaskChecklistModel with CRUD methods
- Add TaskService methods for checklist operations
- Add API routes for checklist endpoints
- Add controller methods for checklist CRUD
- Add UI section in task view with AJAX handlers

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\TaskChecklistModel;
 use CodeIgniter\Events\Events;
 
 class TaskService
@@ -14,6 +15,7 @@ class TaskService
     protected TaskAssigneeModel $assigneeModel;
     protected TaskColumnModel $columnModel;
     protected TaskSubtaskModel $subtaskModel;
+    protected TaskChecklistModel $checklistModel;
 
     public function __construct()
     {
@@ -21,6 +23,7 @@ class TaskService
         $this->assigneeModel = new TaskAssigneeModel();
         $this->columnModel = new TaskColumnModel();
         $this->subtaskModel = new TaskSubtaskModel();
+        $this->checklistModel = new TaskChecklistModel();
     }
 
     /**
@@ -180,6 +183,9 @@ 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['checklists'] = $this->checklistModel->getByTask($taskId);
+        $task['checklists_count'] = count($task['checklists']);
+        $task['checklists_completed'] = count(array_filter($task['checklists'], fn($c) => $c['is_completed']));
 
         return $task;
     }
@@ -349,4 +355,83 @@ class TaskService
 
         return $result;
     }
+
+    // ========== Чек-листы (Checklists) ==========
+
+    /**
+     * Добавить элемент чек-листа
+     */
+    public function addChecklistItem(int $taskId, string $title, int $userId): int
+    {
+        $orderIndex = $this->checklistModel->getNextOrder($taskId);
+
+        $checklistId = $this->checklistModel->insert([
+            'task_id' => $taskId,
+            'title' => trim($title),
+            'order_index' => $orderIndex,
+        ]);
+
+        if ($checklistId) {
+            Events::trigger('task.checklist_item_created', $taskId, $checklistId, $userId);
+        }
+
+        return $checklistId;
+    }
+
+    /**
+     * Переключить статус элемента чек-листа
+     */
+    public function toggleChecklistItem(int $taskId, int $checklistId, int $userId): bool
+    {
+        $checklist = $this->checklistModel->find($checklistId);
+        if (!$checklist || $checklist['task_id'] != $taskId) {
+            return false;
+        }
+
+        $result = $this->checklistModel->toggle($checklistId);
+
+        if ($result) {
+            Events::trigger('task.checklist_item_toggled', $taskId, $checklistId, !$checklist['is_completed'], $userId);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Удалить элемент чек-листа
+     */
+    public function deleteChecklistItem(int $taskId, int $checklistId, int $userId): bool
+    {
+        $checklist = $this->checklistModel->find($checklistId);
+        if (!$checklist || $checklist['task_id'] != $taskId) {
+            return false;
+        }
+
+        $result = $this->checklistModel->delete($checklistId);
+
+        if ($result) {
+            Events::trigger('task.checklist_item_deleted', $taskId, $checklistId, $userId);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Обновить элемент чек-листа
+     */
+    public function updateChecklistItem(int $taskId, int $checklistId, array $data, int $userId): bool
+    {
+        $checklist = $this->checklistModel->find($checklistId);
+        if (!$checklist || $checklist['task_id'] != $taskId) {
+            return false;
+        }
+
+        $result = $this->checklistModel->update($checklistId, $data);
+
+        if ($result) {
+            Events::trigger('task.checklist_item_updated', $taskId, $checklistId, $data, $userId);
+        }
+
+        return $result;
+    }
 }