# Task 18: User Profile Management with Avatar Upload and Password Change

## Implementation Summary

This document summarizes the implementation of user profile management features including avatar upload and password change functionality.

## Completed Subtasks

### 18.1: Add avatar field to user model and create upload endpoints ✅

**Backend Changes:**
- Added `avatar_url` field to User model (`backend/models/user.py`)
- Created migration script (`backend/migrate_avatar_field.py`)
- Added avatar upload endpoint: `POST /users/me/avatar`
- Added avatar removal endpoint: `DELETE /users/me/avatar`
- Added password change endpoint: `PUT /users/me/password`
- Updated UserResponse schema to include `avatar_url` field
- Added UserPasswordChange schema for password change requests

**Features:**
- Image validation (format: jpg, jpeg, png, gif, webp; max size: 5MB)
- Automatic image processing (resize and crop to 200x200)
- Unique filename generation to prevent conflicts
- Storage in `backend/uploads/avatars` directory
- Old avatar cleanup when uploading new one

### 18.2: Create password change endpoint ✅

**Backend Changes:**
- Endpoint: `PUT /users/me/password`
- Requires current password for authentication
- Validates new password (minimum 8 characters)
- Hashes password with bcrypt before storing
- Returns success message after update

### 18.3: Create avatar upload component ✅

**Frontend Component:** `frontend/src/components/user/AvatarUpload.vue`

**Features:**
- Drag-and-drop file upload
- Click-to-browse file selection
- Real-time image preview
- Client-side validation (format and size)
- Upload progress indicator
- Current avatar display with remove button
- Initials-based placeholder when no avatar
- Success/error toast notifications

**UI Components Created:**
- Progress component (`frontend/src/components/ui/progress/Progress.vue`)

### 18.4: Create password change component ✅

**Frontend Component:** `frontend/src/components/user/PasswordChangeForm.vue`

**Features:**
- Current password field with show/hide toggle
- New password field with show/hide toggle
- Confirm password field with real-time matching validation
- Password requirements display with visual indicators:
  - At least 8 characters
  - One uppercase letter
  - One lowercase letter
  - One number
  - One special character
- Password strength indicator (weak, medium, strong)
- Real-time validation for all fields
- Submit button disabled until all validations pass
- Success toast after password change
- Clear error messages for validation failures

### 18.5: Update profile page with avatar and password management ✅

**Updated Component:** `frontend/src/views/ProfileView.vue`

**Changes:**
- Added avatar management section with AvatarUpload component
- Added password management card with PasswordChangeForm component
- Updated profile header to display user avatar
- Added section separators for visual organization
- Implemented avatar update and removal handlers
- Implemented password change handler

**Updated Component:** `frontend/src/components/layout/AppHeader.vue`

**Changes:**
- Updated user menu trigger to display avatar instead of icon
- Added Avatar component with image display
- Shows user initials as fallback
- Displays avatar from backend URL

### 18.6: Update user service and store for avatar and password ✅

**Service Updates:** `frontend/src/services/user.ts`

**New Methods:**
- `uploadAvatar(file: File)`: Upload user avatar image
- `removeAvatar()`: Remove user avatar
- `changePassword(passwordData)`: Change user password

**Type Updates:** `frontend/src/types/auth.ts`

**Changes:**
- Added `avatar_url?: string | null` to User interface

**Model Updates:** `backend/models/__init__.py`

**Changes:**
- Added Notification and Activity model imports to fix database creation

## API Endpoints

### Avatar Management
```
POST   /users/me/avatar     - Upload avatar (multipart/form-data)
DELETE /users/me/avatar     - Remove avatar
```

### Password Management
```
PUT    /users/me/password   - Change password
```

## Database Schema Changes

### Users Table
```sql
ALTER TABLE users ADD COLUMN avatar_url TEXT;
```

## File Structure

```
backend/
├── models/
│   └── user.py                          # Added avatar_url field
├── routers/
│   └── users.py                         # Added avatar and password endpoints
├── schemas/
│   └── user.py                          # Added avatar_url to UserResponse
├── uploads/
│   └── avatars/                         # Avatar storage directory
└── migrate_avatar_field.py              # Migration script

frontend/
├── src/
│   ├── components/
│   │   ├── user/
│   │   │   ├── AvatarUpload.vue         # New component
│   │   │   └── PasswordChangeForm.vue   # New component
│   │   ├── layout/
│   │   │   └── AppHeader.vue            # Updated with avatar display
│   │   └── ui/
│   │       └── progress/
│   │           ├── Progress.vue         # New component
│   │           └── index.ts
│   ├── services/
│   │   └── user.ts                      # Added avatar and password methods
│   ├── types/
│   │   └── auth.ts                      # Added avatar_url to User type
│   └── views/
│       └── ProfileView.vue              # Updated with avatar and password sections
└── docs/
    └── task-18-implementation-summary.md
```

## Testing Checklist

### Backend Testing
- [ ] Test avatar upload with valid image formats
- [ ] Test avatar upload with invalid formats (should fail)
- [ ] Test avatar upload with oversized files (should fail)
- [ ] Test avatar removal
- [ ] Test password change with correct current password
- [ ] Test password change with incorrect current password (should fail)
- [ ] Test password change with weak password (should fail)
- [ ] Verify avatar URL is returned in user profile responses
- [ ] Verify old avatar is deleted when uploading new one

### Frontend Testing
- [ ] Test avatar upload via drag-and-drop
- [ ] Test avatar upload via file browser
- [ ] Test avatar preview before upload
- [ ] Test avatar upload progress indicator
- [ ] Test avatar removal
- [ ] Test avatar display in profile page
- [ ] Test avatar display in app header
- [ ] Test avatar display in user menu
- [ ] Test password change with all validations
- [ ] Test password strength indicator
- [ ] Test password requirements display
- [ ] Test password matching validation
- [ ] Test show/hide password toggles
- [ ] Test error handling for all operations
- [ ] Test success notifications

## Known Issues

### TypeScript Type Caching
- TypeScript may cache the old User type without avatar_url
- Solution: Restart TypeScript server or reload VS Code window
- The type definition has been updated correctly in `frontend/src/types/auth.ts`

## Security Considerations

- Avatar uploads are validated for file type and size
- Images are processed server-side to prevent malicious content
- Passwords are hashed with bcrypt before storage
- Current password is required for password changes
- Password strength requirements are enforced
- File uploads use unique filenames to prevent conflicts
- Old avatars are cleaned up to prevent storage bloat

## Future Enhancements

- [ ] Add image cropping interface for avatar upload
- [ ] Add avatar image optimization (compression)
- [ ] Add support for more image formats (SVG, AVIF)
- [ ] Add password history to prevent reuse
- [ ] Add two-factor authentication
- [ ] Add email verification for password changes
- [ ] Add avatar upload from URL
- [ ] Add avatar templates/presets
- [ ] Add password strength meter with more detailed feedback
- [ ] Add "forgot password" functionality

## Requirements Satisfied

This implementation satisfies the following requirements from the spec:

- **Requirement 1.2.1**: Profile page accessible to all registered users
- **Requirement 1.2.2**: Allow users to upload profile avatar image
- **Requirement 1.2.3**: Accept common image formats for avatars
- **Requirement 1.2.4**: Resize and crop uploaded avatars to standard size
- **Requirement 1.2.5**: Limit avatar file size to maximum of 5MB
- **Requirement 1.2.6**: Display user's avatar in application header and profile page
- **Requirement 1.2.7**: Provide password change form requiring current password
- **Requirement 1.2.8**: Require current password for authentication
- **Requirement 1.2.9**: Require new password to be entered twice for confirmation
- **Requirement 1.2.10**: Validate new password meets minimum security requirements
- **Requirement 1.2.11**: Display password strength indicators during password entry
- **Requirement 1.2.12**: Display confirmation message when password is successfully changed
- **Requirement 1.2.13**: Allow users to remove their avatar and revert to default placeholder
