# Custom Task Types Implementation Summary

## Overview
Implemented the Custom Task Type Manager component that allows coordinators to add, edit, and delete custom task types for both assets and shots beyond the standard predefined types.

## Files Created

### 1. Service Layer
**File:** `frontend/src/services/customTaskType.ts`
- API service for custom task type management
- Methods:
  - `getAllTaskTypes()` - Get all task types (standard + custom)
  - `addCustomTaskType()` - Add a new custom task type
  - `updateCustomTaskType()` - Update an existing custom task type name
  - `deleteCustomTaskType()` - Delete a custom task type

### 2. Component
**File:** `frontend/src/components/settings/CustomTaskTypeManager.vue`
- Main component for managing custom task types
- Features:
  - Separate sections for asset and shot task types
  - Visual distinction between standard (read-only) and custom (editable) types
  - Add button with dialog for creating new custom types
  - Edit functionality with inline validation
  - Delete button with confirmation dialog
  - Warning when attempting to delete task types in use
  - Real-time validation of task type names

### 3. Integration
**File:** `frontend/src/views/ProjectSettingsView.vue`
- Integrated CustomTaskTypeManager into the Tasks tab
- Positioned above the DefaultTaskTemplatesEditor
- Added event handler to refresh task templates when custom types are updated

### 4. Test File
**File:** `frontend/test-custom-task-types.html`
- Interactive HTML mockup demonstrating the UI
- Shows standard vs custom task types
- Demonstrates add, edit, and delete functionality

## Component Features

### Asset Task Types Section
- Lists all asset task types (standard + custom)
- Standard types: modeling, surfacing, rigging (read-only)
- Custom types: editable and deletable
- Add button to create new custom asset task types

### Shot Task Types Section
- Lists all shot task types (standard + custom)
- Standard types: layout, animation, simulation, lighting, compositing (read-only)
- Custom types: editable and deletable
- Add button to create new custom shot task types

### Add Task Type Dialog
- Input field for task type name
- Real-time validation:
  - 3-50 characters required
  - Lowercase alphanumeric with underscores only
  - No duplicates allowed
- Category selection (asset or shot)
- Save/Cancel buttons

### Edit Task Type Dialog
- Pre-filled input with current name
- Same validation as add dialog
- Updates all existing tasks using this type
- Save/Cancel buttons

### Delete Confirmation
- Warning dialog before deletion
- Shows error if task type is in use
- Displays count of tasks using the type
- Prevents deletion of standard types

## Validation Rules

Task type names must:
- Be 3-50 characters long
- Use lowercase letters, numbers, and underscores only
- Not duplicate existing task types (standard or custom)
- Match regex pattern: `^[a-z0-9_]{3,50}$`

## User Experience

### Visual Design
- Standard task types have a "Standard" badge (secondary variant)
- Custom task types have a "Custom" badge (outline variant)
- Edit and delete buttons only appear for custom types
- Hover effects on task items
- Loading states during API calls
- Toast notifications for success/error feedback

### Error Handling
- Validation errors shown inline in dialogs
- API errors displayed via toast notifications
- Delete errors shown in confirmation dialog
- Graceful handling of network failures

### Integration with Task Templates
- When custom types are added/updated/deleted, the task template editor is refreshed
- Custom types automatically appear in the DefaultTaskTemplatesEditor
- Custom types can be enabled/disabled per asset category or for all shots

## API Endpoints Used

```
GET    /projects/{project_id}/custom-task-types
POST   /projects/{project_id}/custom-task-types
PUT    /projects/{project_id}/custom-task-types/{task_type}
DELETE /projects/{project_id}/custom-task-types/{task_type}?category={category}
```

## Backend Requirements

The backend must implement:
1. Custom task type storage in projects table (JSON columns)
2. CRUD endpoints for custom task types
3. Validation for task type names
4. Check for task types in use before deletion
5. Return standard + custom types in responses

## Testing

To test the component:
1. Open `frontend/test-custom-task-types.html` in a browser for UI mockup
2. Navigate to Project Settings > Tasks tab in the application
3. Test adding custom task types (e.g., "grooming", "lookdev", "previz")
4. Test editing custom task type names
5. Test deleting custom task types
6. Verify standard types cannot be edited or deleted
7. Verify validation works correctly
8. Check that task templates update when custom types change
9. Verify the list updates immediately without requiring a browser refresh

## Bug Fixes

### Issue: Empty state showing after add/delete
**Problem:** When adding or deleting task types, the view showed "No asset task types defined" until browser refresh.

**Root Cause:** The v-for loop and empty state div were siblings, causing both to potentially render simultaneously.

**Solution:** Wrapped the v-for in a `<template v-if>` block with a corresponding `v-else` for the empty state, ensuring only one renders at a time.

**Changes:**
- Used `<template v-if="assetTaskTypes.length > 0">` wrapper for the task list
- Changed empty state from `v-if="assetTaskTypes.length === 0"` to `v-else`
- Applied same pattern to shot task types section
- Added console.log statements to debug API responses

### Issue: 405 Method Not Allowed on DELETE
**Problem:** When deleting a task type, the API returned a 405 Method Not Allowed error.

**Root Cause:** Task type names with special characters or spaces were not being properly URL-encoded in the DELETE request path.

**Solution:** Added `encodeURIComponent()` to properly encode the task type name in the URL path for both update and delete operations.

**Changes:**
- Added URL encoding in `deleteCustomTaskType()` method
- Added URL encoding in `updateCustomTaskType()` method for consistency
- Added debug logging to track the values being sent to the API

## Future Enhancements

Potential improvements:
1. Drag-and-drop reordering of task types
2. Task type descriptions and icons
3. Department mapping for task types
4. Task type templates (save/load sets of custom types)
5. Import/export custom task types between projects
6. Task type usage statistics
7. Bulk operations (add multiple types at once)

## Notes

- The component follows the existing design patterns in the codebase
- Uses shadcn-vue components for consistency
- Implements proper TypeScript types
- Follows Vue 3 Composition API patterns
- Integrates seamlessly with existing project settings
- Maintains separation of concerns (service layer, component, view)
