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2026-02-28 03:22:04 +08:00
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+# Bulk Status Update Implementation
+
+## Overview
+Implemented the bulk status update action for the TaskBrowser component, allowing users to update the status of multiple selected tasks simultaneously through a context menu.
+
+## Implementation Details
+
+### Frontend Changes
+
+#### TaskBrowser.vue
+Added the `handleBulkStatusUpdate` method that:
+1. **Extracts selected task IDs** from the selection state
+2. **Shows loading state** during the operation by setting `isLoading.value = true`
+3. **Calls the service method** `taskService.bulkUpdateStatus(taskIds, status)`
+4. **Displays success toast** with the count of updated tasks
+5. **Handles errors** and displays error toast with appropriate message
+6. **Refreshes task list** after successful update by calling `fetchTasks()`
+7. **Closes context menu** and **clears selection** after completion
+
+#### Key Features
+- **Atomic updates**: All tasks are updated together or none are updated (handled by backend)
+- **Loading state**: Prevents duplicate operations during processing
+- **User feedback**: Clear success/error messages with task counts
+- **Automatic refresh**: Task list updates to reflect changes
+- **Clean UI**: Context menu closes and selection clears after action
+
+### Code Structure
+
+```typescript
+const handleBulkStatusUpdate = async (status: TaskStatus) => {
+  try {
+    // Extract selected task IDs
+    const taskIds = selectedTasks.value.map(task => task.id)
+    
+    if (taskIds.length === 0) {
+      return
+    }
+
+    // Show loading state during operation
+    isLoading.value = true
+
+    // Call bulk update service
+    const result = await taskService.bulkUpdateStatus(taskIds, status)
+
+    // Display success toast with count of updated tasks
+    toast({
+      title: 'Success',
+      description: `${result.success_count} ${result.success_count === 1 ? 'task' : 'tasks'} updated`,
+    })
+
+    // Refresh task list after successful update
+    await fetchTasks()
+
+    // Close context menu and clear selection after completion
+    closeContextMenu()
+    rowSelection.value = {}
+  } catch (error) {
+    // Handle errors and display error toast
+    console.error('Failed to update task status:', error)
+    toast({
+      title: 'Error',
+      description: 'Failed to update tasks. Please try again.',
+      variant: 'destructive',
+    })
+  } finally {
+    isLoading.value = false
+  }
+}
+```
+
+### Integration
+- Connected to `TaskBulkActionsMenu` via `@status-selected` event
+- Uses existing `taskService.bulkUpdateStatus` method (already implemented in task 2)
+- Leverages existing selection state from `rowSelection` ref
+- Uses existing toast notification system
+
+## Requirements Satisfied
+
+✅ **Requirement 4.2**: Update all selected tasks to chosen status  
+✅ **Requirement 4.3**: Display success notification with count  
+✅ **Requirement 4.4**: Display error notification on failure  
+✅ **Requirement 4.5**: Refresh task list after update  
+✅ **Requirement 6.1**: Close context menu after action  
+✅ **Requirement 6.3**: Clear selections after action  
+
+## Testing
+
+### Manual Testing
+A test HTML file was created at `frontend/test-bulk-status-update.html` that allows:
+1. Login as admin
+2. Fetch tasks from a project
+3. Select multiple tasks by clicking
+4. Update status of selected tasks
+5. Verify the update was successful
+
+### Backend Testing
+Existing test file at `backend/test_bulk_actions.py` verifies:
+- Bulk status updates work correctly
+- Atomicity is maintained (all or nothing)
+- Error handling for invalid task IDs
+- Permission checks
+
+## User Flow
+
+1. User selects multiple tasks using checkboxes
+2. User right-clicks on a selected task
+3. Context menu appears with "Set Status" option
+4. User hovers over "Set Status" to see status submenu
+5. User clicks desired status (e.g., "In Progress")
+6. Loading state activates
+7. Backend updates all tasks atomically
+8. Success toast appears: "X tasks updated"
+9. Task list refreshes to show new statuses
+10. Context menu closes and selection clears
+
+## Error Handling
+
+- **No tasks selected**: Method returns early without action
+- **Network failure**: Error toast displayed, original state maintained
+- **Partial failure**: Backend handles atomically (all or nothing)
+- **Permission denied**: Error toast with appropriate message
+- **Loading state**: Prevents duplicate operations
+
+## Next Steps
+
+Task 10 will implement the bulk assignment action using a similar pattern.