Fixes ModuleNotFoundError by using Python's built-in zoneinfo module
instead of the external pytz dependency. zoneinfo is the standard
library solution for timezone handling in Python 3.9+.
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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Fixes 500 error when user timezone is invalid or missing.
Now gracefully falls back to UTC if timezone conversion fails.
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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Tasks were incorrectly showing as overdue when they were due today.
The issue was that the overdue check was comparing the due date
against UTC's "today" instead of the user's local "today".
Now uses the user's timezone setting to determine the current date
when checking if a task is overdue. This ensures tasks due "today"
only become overdue when the user's local date advances to tomorrow.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Previously priority sorting was alphabetical (high < low < medium < urgent)
instead of by importance. Now uses Django Case/When to map priority strings
to numeric values: urgent=4, high=3, medium=2, low=1.
Fixes both queryset sorting and list sorting for overdue filter.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Adds automatic creation of next task instance when recurring tasks are completed.
- Add calculate_next_due_date() and create_next_recurrence() methods to Task model
- Update task completion handlers in views and sync API to create next recurrence
- Add hourly Celery task to process any missed recurring tasks
- Support daily, weekly, biweekly, monthly, yearly recurrence patterns
- Respect recurrence_end_date limits
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Added validation for status, priority, and recurrence fields in web forms to prevent invalid database values.
Changes:
TaskUpdateView.post() (line 419):
- Validate status against Task.STATUS_CHOICES before setting
- Validate priority against Task.PRIORITY_CHOICES before setting
- Validate recurrence against Task.RECURRENCE_CHOICES before setting
- Only update fields if value is in allowed choices
- Default to 'none' for invalid recurrence values
TaskCreateView.post() (line 481):
- Validate status, default to 'pending' if invalid
- Validate priority, default to 'medium' if invalid
- Validate recurrence, default to 'none' if invalid
- Prevents creation with invalid choice values
Allowed Choices:
- Status: pending, in_progress, completed, cancelled
- Priority: low, medium, high, urgent
- Recurrence: none, daily, weekly, biweekly, monthly
Security impact:
- Prevents invalid database values from user input
- Maintains data integrity
- Blocks potential business logic bypasses
- Prevents database constraint violations
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Fixed open redirect vulnerability in 9 locations throughout tasks/views.py.
Changes:
- Added url_has_allowed_host_and_scheme import from django.utils.http
- Created safe_redirect() helper function to validate redirect URLs
- Only allows relative URLs or URLs to the same host
- Prevents attackers from redirecting users to phishing/malicious sites
Fixed locations:
- Line 447: TaskUpdateView - task update redirect
- Line 501: task_quick_add - quick add redirect
- Line 521: subtask_create - subtask creation redirect
- Line 537: task_toggle_status - status toggle redirect
- Line 549: task_delete - task deletion redirect
- Line 601: web_timer_start - timer start redirect
- Line 626: web_timer_stop - timer stop redirect
- Line 672: TagUpdateView - tag update redirect
- Line 684: tag_delete - tag deletion redirect
Security impact:
- Prevents phishing attacks via malicious redirect URLs
- Blocks cache poisoning attacks
- Ensures users stay within the application domain
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Added comprehensive authorization checks to prevent users from:
1. Sharing tasks/tags they don't own
2. Modifying tasks/tags that are only shared with them (read-only access)
Changes:
tasks/serializers.py (TaskShareSerializer):
- Added validation in validate() method to verify task/tag ownership
- Users can only share their own tasks and tags
- Prevents malicious users from sharing other people's resources
tasks/permissions.py (NEW):
- Created IsOwnerOrReadOnlyIfShared permission class
- Owners: full access (read, update, delete)
- Shared users: read-only access
- Prevents privilege escalation via shared access
tasks/views.py:
- Applied IsOwnerOrReadOnlyIfShared to TaskDetailAPIView
- Applied IsOwnerOrReadOnlyIfShared to TagDetailAPIView
- Enforces object-level permissions on all update/delete operations
Security impact:
- Prevents users from modifying or deleting resources they don't own
- Prevents users from sharing resources they don't own
- Maintains proper separation between owner and shared access levels
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Features:
- Django-based REST API with web interface
- Task management with tags, priorities, and due dates
- Time tracking with start/stop timers
- Subtasks support
- Task filtering (all, today, upcoming, overdue, completed)
- Tag-based organization with color coding
- Sorting by due date and priority
- Auto-assign tags when filtering
- Responsive 3-pane layout (sidebar, task list, detail panel)
- Task sharing between users
- Mobile-responsive design with dark mode support
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
