Migrate from workout datatype to timer

[a-mabe]

TODO

• Allow legacy workout import

Testing

1. Start from old version with timers configured. [ ]
2. Upgrade and verify migration. [ ]
3. Test on new version: [ ]

• Number of intervals can be set correctly.
  • Minimum value is validated.
  • Maximum value is validated.
• Work time can be set correctly.
  • Minimum value is validated.
  • Maximum value is validated.
• Rest time can be set correctly.
  • Minimum value is validated.
  • Maximum value is validated.
• Warmup time can be set correctly.
  • Minimum value is validated.
  • Maximum value is validated.
• Cooldown time can be set correctly.
  • Minimum value is validated.
  • Maximum value is validated.
• Get ready time can be set correctly.
  • Minimum value is validated.
  • Maximum value is validated.
• Number of auto restarts can be set correctly.
  • Minimum value is validated.
  • Maximum value is validated.
• Break time between restarts can be set correctly.
  • Minimum value is validated.
  • Maximum value is validated.
• Exercises can be added to the work intervals.
  • Exercise names can be edited.
  • Exercise list is saved with the timer.

• Timer Actions

• Create Timer

• User can create a new timer with all default settings.
• User can create a timer with customized settings.
• User is prompted if required fields are left empty.
• Validation is enforced for invalid inputs.

• Import Timer

• User can import a timer from a valid file (can be legacy workout or new timer file).
• App handles invalid file formats gracefully.
• Imported timers retain all their settings accurately.
• App handles duplicate timer imports.

• Export Timer

• User can export an existing timer to a file.
• Exported file format is valid and compatible for re-import.
• Timer settings are preserved in the exported file.

• Copy Timer

• User can copy an existing timer.
• Copied timer retains all settings of the original timer.
• Copied timer is assigned a unique identifier.

• Delete Timer

• User can delete an existing timer.
• App prompts user for confirmation before deletion.
• Deleted timers are removed from the timer list.

• Edit Timer

• User can edit all settings of an existing timer.
• Edits are saved correctly.
• App prevents invalid edits (e.g., removing all exercises).

• General Functionality

• Timer list displays all created timers.
  • List updates dynamically after adding, editing, or deleting timers.
• UI is responsive and handles different screen sizes.
• App displays error messages for invalid actions.
• App handles edge cases gracefully (e.g., importing an empty file, deleting the only timer).

• Timer Playback

• Timer plays all intervals as per settings.
  • Correct durations for work, rest, warmup, cooldown, and break times.
• Timer announces or displays "Get ready" time.
• Auto restarts function as expected.
  • Break time is honored between restarts.
  • If no break time is added, another Rest interval is used between restarts.
• Exercises are displayed correctly during work intervals.
• Timer stops at the end of all intervals.
• App handles timer interruptions (e.g., app minimized or closed).

• Notifications and Background Behavior

• Timer runs correctly when the app is in the background.
• Timer continues to function when screen is off.
• App handles interruptions like incoming calls or system notifications.

• Edge Cases

• User creates a timer with the minimum valid settings.
• User creates a timer with the maximum valid settings.
• User sets a timer with unusual combinations (e.g., 0 rest time, 0 work time, etc.).
• User imports/exported timer data with unsupported modifications (e.g., tampered file).

• Performance

• Timer playback remains smooth with complex settings (e.g., many intervals, exercises, auto restarts).
• App does not crash under high usage.