breedr/SPRINT1_PEDIGREE_COMPLETE.md

Sprint 1 Complete: Interactive Pedigree Tree ✅

What Was Built

A fully interactive, production-ready pedigree tree visualization system for BREEDR.

Components Created

1. PedigreeTree.jsx - Core D3 tree visualization component

   • Interactive zoom and pan controls
   • Color-coded nodes (blue for males, pink for females)
   • Click-to-navigate functionality
   • Responsive design
   • COI display with risk indicators
   • Legend for visual reference

2. PedigreeTree.css - Complete styling

   • Polished UI with controls overlay
   • Mobile-responsive breakpoints
   • Print-friendly styles
   • Smooth animations and transitions

3. pedigreeHelpers.js - Utility functions

   • transformPedigreeData() - Converts API data to D3 tree format
   • countAncestors() - Counts total ancestors
   • getGenerationCounts() - Analyzes generation distribution
   • isPedigreeComplete() - Checks pedigree completeness
   • findCommonAncestors() - Identifies shared ancestors
   • formatCOI() - Formats COI with risk levels
   • getPedigreeCompleteness() - Calculates completeness percentage

4. PedigreeView.jsx - Full page implementation

   • Stats dashboard showing COI, completeness, generation selector
   • Loading and error states
   • Breadcrumb navigation
   • Help tips for users
   • Responsive grid layout

Features

✅ Interactive Controls

• Zoom In/Out buttons
• Reset view button
• Mouse wheel zoom
• Click and drag to pan
• Touch support for mobile

✅ Visual Enhancements

• Color-coded by sex (♂ blue, ♀ pink)
• Registration numbers displayed
• Birth years shown
• Clean, modern design
• Smooth animations

✅ Data Display

• COI with color-coded risk levels:
  • Green (≤5%): Low inbreeding, excellent diversity
  • Yellow (5-10%): Moderate inbreeding, acceptable with caution
  • Red (>10%): High inbreeding, consider genetic diversity
• Pedigree completeness percentage
• Generation selector (3, 4, or 5 generations)
• Progress bars and visual indicators

✅ Navigation

• Click any node to view that dog's profile
• Back to Profile button
• Breadcrumb navigation
• Deep linking support

✅ Responsive Design

• Desktop optimized
• Tablet friendly
• Mobile responsive
• Print-friendly layout

Installation & Setup

1. Install Dependencies

The required dependencies should already be in package.json:

cd client
npm install

Key dependencies:

• react-d3-tree: ^3.6.2 - D3 tree visualization
• date-fns: ^2.30.0 - Date formatting utilities
• d3: ^7.9.0 - D3 core library

2. Deploy the Branch

git checkout feature/enhanced-litters-and-pedigree
git pull origin feature/enhanced-litters-and-pedigree

3. Restart the Application

With Docker:

docker-compose down
docker-compose up --build -d

Without Docker:

# Terminal 1 - Server
cd server
npm install
npm run dev

# Terminal 2 - Client
cd client
npm install
npm run dev

4. Access the Pedigree

Navigate to any dog and access the pedigree at:

http://localhost:5173/pedigree/:dogId

For example:

http://localhost:5173/pedigree/1

Testing Checklist

Basic Functionality

• Pedigree page loads without errors
• Tree displays correctly for dogs with parents
• Nodes show correct information (name, registration, birth year)
• Colors are correct (blue=male, pink=female)

Interactive Controls

• Zoom in button works
• Zoom out button works
• Reset button returns to default view
• Mouse wheel zoom works
• Click and drag panning works

Navigation

• Clicking a node navigates to that dog's profile
• Back to Profile button works
• Generation selector changes displayed generations

Data Display

• COI displays correctly with proper color
• Pedigree completeness calculates accurately
• Stats update when generation selector changes

Edge Cases

• Handles dogs with no parents gracefully
• Handles dogs with only one parent
• Handles incomplete pedigrees
• Shows appropriate message when no data available

Responsive Design

• Works on desktop (1920x1080)
• Works on tablet (768x1024)
• Works on mobile (375x667)
• Print view displays correctly

API Requirements

The pedigree tree depends on these existing API endpoints:

Required Endpoints

1. GET /api/pedigree/:id - Get pedigree tree

   • Must return nested sire/dam objects
   • Should include: id, name, sex, registration_number, birth_date
   • Example response:

   {
     "id": 1,
     "name": "Dog Name",
     "sex": "male",
     "registration_number": "ABC123",
     "birth_date": "2020-01-01",
     "sire": {
       "id": 2,
       "name": "Father Name",
       "sex": "male",
       "sire": { ... },
       "dam": { ... }
     },
     "dam": {
       "id": 3,
       "name": "Mother Name",
       "sex": "female",
       "sire": { ... },
       "dam": { ... }
     }
   }
   

2. GET /api/pedigree/:id/coi - Get COI calculation

   • Returns coefficient of inbreeding
   • Example response:

   {
     "coi": 3.125,
     "generations": 5
   }
   

Known Limitations

1. Performance: Very large pedigrees (>100 nodes) may experience slowdown
2. COI: Calculation requires complete pedigree data
3. Mobile: Tree may be difficult to navigate on very small screens
4. Print: May require landscape orientation for best results

Future Enhancements (Not in Sprint 1)

• PDF export functionality
• Highlight common ancestors between two dogs
• Show inbreeding loops visually
• Ancestor search/filter
• Save custom tree views
• Share pedigree links
• Printable certificate template

Troubleshooting

Tree Doesn't Display

• Check browser console for errors
• Verify API endpoint /api/pedigree/:id is working
• Check that dog has parent data in database
• Ensure dependencies are installed (npm install)

Zoom/Pan Not Working

• Check that react-d3-tree is properly installed
• Clear browser cache and reload
• Try in different browser

COI Not Showing

• Verify /api/pedigree/:id/coi endpoint exists
• Check that pedigree has sufficient data (at least 3 generations)
• COI may be null for incomplete pedigrees

Styling Issues

• Ensure PedigreeTree.css is imported in component
• Check that CSS variables are defined in main stylesheet
• Clear browser cache

Files Modified/Created

New Files

client/src/
├── components/
│   ├── PedigreeTree.jsx          ✅ NEW
│   └── PedigreeTree.css          ✅ NEW
├── utils/
│   └── pedigreeHelpers.js        ✅ NEW
└── pages/
    └── PedigreeView.jsx           ✅ UPDATED

Modified Files

• client/package.json - Dependencies already present
• client/src/pages/PedigreeView.jsx - Rebuilt from placeholder

Next Steps

Sprint 1 is COMPLETE ✅

Ready to proceed with Sprint 2:

• Litter Detail Page with comprehensive information
• Countdown Widget for whelping dates
• Enhanced Litter List with filters and sorting
• Database Migration for additional litter fields

---

Support

If you encounter issues:

1. Check browser console for errors
2. Review this documentation
3. Check API endpoints are responding
4. Verify database has parent relationships

Success Criteria Met ✅

• ✅ Interactive tree with D3 visualization
• ✅ 5-generation display (configurable to 3, 4, or 5)
• ✅ Zoom, pan, and navigation controls
• ✅ Color-coded nodes by sex
• ✅ COI display with risk indicators
• ✅ Pedigree completeness tracking
• ✅ Click-to-navigate functionality
• ✅ Responsive design
• ✅ Loading and error states
• ✅ Helper utilities for data transformation
• ✅ Print-friendly layout

Sprint 1: COMPLETE AND READY FOR TESTING 🎉