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Extract notification functions from app/index.js into a dedicated NotificationService module. This is Week 2 of the incremental refactoring plan (see incremental-refactoring-plan.md).

Changes:

  • Create app/notifications/service.js with NotificationService class
  • Extract showNotification() and playNotificationSound() functions (84 lines removed)
  • Break coupling by injecting getUserStatus dependency instead of direct global access
  • Register IPC handlers through service.initialize() method
  • Remove notificationSounds array from index.js (now encapsulated in service)

Benefits:

  • Breaks coupling between notifications and global user status
  • Encapsulates notification logic in single-responsibility module
  • Improves testability by allowing dependency injection
  • Reduces index.js from 656 to 572 lines (13% reduction)

Related to #1960, part of epic #1959
Week 2 of 8-week incremental refactoring plan

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Summary of Changes

Hello @IsmaelMartinez, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request implements the second week of an incremental refactoring plan by extracting all notification-related logic from the monolithic app/index.js into a dedicated NotificationService module. This change significantly improves the modularity and maintainability of the application by centralizing notification responsibilities, reducing coupling through dependency injection, and making the code more testable.

Highlights

  • Notification Module Extraction: Moved showNotification() and playNotificationSound() functions from app/index.js to a new NotificationService module (app/notifications/service.js).
  • Dependency Injection: Decoupled notification logic from global user status by injecting a getUserStatus function into the NotificationService.
  • Encapsulation: The notificationSounds array is now encapsulated within the NotificationService instead of being a global variable in app/index.js.
  • IPC Handler Registration: IPC handlers for notifications are now registered via the NotificationService.initialize() method, centralizing their setup.
  • Code Reduction: app/index.js saw a significant reduction in lines of code (84 lines removed from notification functions, plus the notificationSounds array).
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Code Review

This pull request successfully extracts the notification logic from app/index.js into a new NotificationService, which is a great step towards better modularity and testability. The use of dependency injection to break the coupling with global state is well-executed. My review includes a few suggestions to further improve the new service by handling potential errors and improving code clarity. Specifically, I've pointed out a potential unhandled promise rejection, a case where a missing notification icon could cause a crash, and some opportunities to improve readability by removing magic numbers and simplifying module imports.

@IsmaelMartinez IsmaelMartinez changed the title Investigate issue #1960 from epic #1959 [Refactor]: Extract notification functions from app/index.js - part of #1960 Nov 17, 2025
@IsmaelMartinez IsmaelMartinez self-assigned this Nov 17, 2025
@IsmaelMartinez IsmaelMartinez moved this to In Progress in 2.x Nov 17, 2025
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Extract notification functions from app/index.js into a dedicated NotificationService module.
This is Week 2 of the incremental refactoring plan (see incremental-refactoring-plan.md).

Changes:
- Create app/notifications/service.js with NotificationService class
- Extract showNotification() and playNotificationSound() functions (84 lines removed)
- Break coupling by injecting getUserStatus dependency instead of direct global access
- Register IPC handlers through service.initialize() method
- Remove notificationSounds array from index.js (now encapsulated in service)

Benefits:
- Breaks coupling between notifications and global user status
- Encapsulates notification logic in single-responsibility module
- Improves testability by allowing dependency injection
- Reduces index.js from 656 to 572 lines (13% reduction)

Related to #1960, part of epic #1959
Week 2 of 8-week incremental refactoring plan
Address code review feedback from Gemini Code to improve robustness and maintainability:

1. Add USER_STATUS constants for better code readability
   - Define UNKNOWN (-1) and AVAILABLE (1) as named constants
   - Replace magic numbers with semantic names

2. Await playNotificationSound call to prevent unhandled promise rejections
   - Ensures errors are caught by try-catch block
   - Makes error handling more robust

3. Handle null/undefined icon gracefully
   - Only add icon to notification config if provided
   - Prevents errors from createFromDataURL with invalid input

4. Separate IPC handlers from core logic
   - Create dedicated #handleShowNotification and #handlePlayNotificationSound
   - Internal methods #showNotification and #playNotificationSound contain core logic
   - Improves separation of concerns and clarity

5. Fix redundant mainAppWindow require in index.js
   - Move mainAppWindow require before NotificationService instantiation
   - Use the constant instead of inline require()
   - Makes dependencies clearer and avoids duplicate requires

All changes maintain backward compatibility and pass linting.
@IsmaelMartinez IsmaelMartinez force-pushed the claude/investigate-issue-1960-018a5U9t1H3QJvMD8pi5x2Uz branch from 8961f2c to 5fefd19 Compare November 17, 2025 15:46
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✅ Changelog entry generated and committed to this PR:

[Refactor]: Extract notification functions from app/index.js - part of #1960 - by @IsmaelMartinez (#1962)

The file .changelog/pr-1962.txt will be included when you merge this PR.

You can edit it directly in this PR if needed.

@sonarqubecloud
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@IsmaelMartinez IsmaelMartinez merged commit fde955a into main Nov 17, 2025
3 checks passed
@IsmaelMartinez IsmaelMartinez deleted the claude/investigate-issue-1960-018a5U9t1H3QJvMD8pi5x2Uz branch November 17, 2025 15:49
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