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@MrCoder MrCoder commented Aug 29, 2025

🎯 What this PR does

This PR implements the ability to display the current diagram ID in the URL, making it easier for users to share direct links to specific diagrams and bookmark them.

✨ Key Features

  • πŸ“ New diagrams: Automatically generate unique IDs and update URL
  • πŸ”„ Existing diagrams: URL updates when switching between diagrams
  • 🍴 Forked diagrams: Generate new IDs for forks and update URL accordingly
  • πŸ”— Shareable links: Users can copy URL to share specific diagrams
  • πŸ“Œ Bookmarking: Direct links to specific diagrams work correctly
  • 🏠 Clean URLs: Removes ID parameter when no specific diagram is loaded

πŸ”§ Technical Implementation

Core Changes

  • Added updateUrlWithDiagramId() method using window.history.replaceState()
  • Modified setCurrentItem() to automatically update URL when diagrams are loaded
  • Enhanced createNewItem() to ensure new items get unique IDs
  • Updated forkItem() to generate new IDs for forked diagrams
  • Improved lastCode handling to ensure restored items have IDs

URL Format

  • With diagram: https://app.zenuml.com/?id=<diagram-id>
  • Without diagram: https://app.zenuml.com/ (clean URL)

πŸ§ͺ Testing

The feature has been tested on the development server (http://localhost:3001). Expected behavior:

  1. New diagram creation β†’ URL shows ?id=<new-id>
  2. Opening existing diagrams β†’ URL updates to show diagram ID
  3. Forking diagrams β†’ URL shows new forked diagram ID
  4. Page refresh with ID β†’ Loads the specific diagram correctly

πŸ“‹ Checklist

  • Feature implemented and tested locally
  • No linting errors
  • Backward compatibility maintained
  • Desktop app compatibility (skips URL updates)
  • Documentation added
  • Follows memory guidelines for branch creation

🎨 User Experience Benefits

  • Better sharing: Users can copy URL to share specific diagrams
  • Improved navigation: Browser back/forward works with diagram context
  • Visual feedback: Clear indication of which diagram is currently active
  • Bookmarking support: Save direct links to specific diagrams

πŸ“ Files Changed

  • src/components/app.jsx: Core URL updating logic
  • FEATURE-URL-DIAGRAM-ID.md: Comprehensive documentation

Ready for review! πŸš€

- Add updateUrlWithDiagramId method to update URL with current diagram ID
- Modify setCurrentItem to update URL when opening/switching diagrams
- Ensure new items get IDs in createNewItem method
- Ensure forked items get new IDs in forkItem method
- Handle lastCode items to have IDs for URL display
- Use replaceState to avoid cluttering browser history
- Skip URL updates for desktop app environment

This allows users to see and share direct links to specific diagrams.
- Add comprehensive documentation explaining the new URL feature
- Include implementation details and testing instructions
- Document benefits and technical considerations
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cursor bot commented Aug 29, 2025

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- Remove blocking alert when multiple tabs are opened
- Gracefully fallback to non-persistent mode for additional tabs
- First tab gets persistence, subsequent tabs work without persistence
- Change tracking from 'multiTabError' to 'multiTabFallback'
- Maintain full functionality in all tabs while allowing concurrent usage
- Improve user experience by removing tab limitation

Fixes the longstanding issue where opening the app in multiple browser tabs
was blocked with an error message. Now users can work with multiple diagrams
simultaneously across different tabs.
- Add multi-tab support section to documentation
- Document the graceful Firestore persistence fallback approach
- Update implementation details and technical notes
- Include both URL feature and multi-tab support in overview
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