Summary: Add ability to add new repositories to hackathon and improve form UI ✅

This PR successfully addresses the requirements to add the ability to add any new repository or repositories to a hackathon when creating/editing it, and significantly improves the visual design of the hackathon form.

Completed Changes:

• Analyze current hackathon form structure and repository management
• Add UI for adding new repositories by URL in hackathon form
• Add backend logic to create repositories from URLs during hackathon creation
• Improve form visual design with better layout and styling
• Add validation for repository URLs
• Update JavaScript to handle dynamic repository additions
• Run linting (black, isort, ruff) and address issues
• Create comprehensive tests for the new functionality
• Fix test error: Organization.admin is a ForeignKey, not ManyToManyField
• Run security scanning (CodeQL) - No vulnerabilities found ✅
• Code ready for manual testing and review

Changes Made

🔧 Backend (forms.py)

• ✅ Added new_repo_urls CharField to HackathonForm for entering multiple GitHub repository URLs
• ✅ Implemented clean_new_repo_urls() validation method that:
  • Validates GitHub URLs start with https://github.com/
  • Ensures URLs have proper format: https://github.com/owner/repo
  • Handles multiple URLs (one per line)
  • Filters out blank lines
• ✅ Enhanced save() method to:
  • Create new Repo objects from provided URLs
  • Link repos to the selected organization
  • Handle duplicate URLs (uses existing repo if URL already exists)
  • Automatically add all repositories to the hackathon
• ✅ Applied black and isort formatting for code consistency

🎨 Frontend (form.html)

• ✅ Reorganized form into logical sections with visual hierarchy:
  • Basic Information: Name, Organization, Description
  • Schedule & Settings: Start/End times, Registration settings, Max participants
  • Visual Design: Banner image upload
  • Rules & Guidelines: Hackathon rules
  • Repositories: Existing repos + New repo URLs section
  • Sponsorship Information: Sponsor note and link
• ✅ Enhanced repository section:
  • Separated existing repos selection from new repo URL input
  • Added helpful instructions with blue info box
  • Clear labeling and descriptions for each field
• ✅ Improved styling:
  • Section headers with red (#e74c3c) accent borders
  • Better spacing with space-y-10 between sections
  • Enhanced form width (max-w-5xl) for better readability
  • Improved input field styling with focus states
  • Added Cancel button alongside Submit button
  • Shadow effects on submit button
• ✅ Better user experience:
  • Clear section descriptions
  • Helper text for each field
  • Visual separation between sections
  • Responsive design for mobile/tablet

⚡ JavaScript (hackathon_form.js)

• ✅ Created dedicated JavaScript file for maintainability
• ✅ Handles dynamic repository loading from /api/v1/organizations/{id}/repositories/
• ✅ Improved error handling with user-friendly messages
• ✅ Supports editing mode - pre-selects existing repositories
• ✅ Clean separation of concerns from template
• ✅ Form validation before submission

🧪 Tests (test_hackathon_form.py)

• ✅ Created comprehensive test suite with 11 test cases:
  • ✅ Valid form data submission
  • ✅ Creating new repositories from URLs
  • ✅ Invalid GitHub URLs (non-GitHub domains)
  • ✅ Malformed URLs (missing owner or repo)
  • ✅ Handling existing repository URLs (no duplicates)
  • ✅ Empty new_repo_urls field
  • ✅ Blank lines in new_repo_urls
  • ✅ Organization filtering based on user permissions
  • ✅ Mixed existing and new repositories
• ✅ All tests follow Django TestCase patterns
• ✅ Proper setup and teardown
• ✅ Fixed: Organization.admin is a ForeignKey (single user), assign directly instead of using .add()

🎯 Key Features Implemented

1. Add New Repositories by URL

• Users can paste GitHub repository URLs (one per line) in the "Add New Repositories" textarea
• Format: https://github.com/owner/repo
• Supports multiple repositories at once

2. Automatic Repository Creation

• New repositories are automatically created when the form is saved
• Repositories are linked to the selected organization
• Repos are immediately added to the hackathon

3. Smart Duplicate Handling

• If a repository URL already exists in the system, it reuses the existing repo
• No duplicate repositories are created
• Existing repos are still added to the hackathon

4. URL Validation

• Validates URLs are proper GitHub URLs
• Checks format: https://github.com/owner/repo
• Clear error messages for invalid URLs

5. Improved UI/UX

• Form is now organized into 6 clear sections
• Better visual hierarchy with section headers
• Improved spacing and readability
• Helpful tips and descriptions throughout
• Responsive design for all screen sizes

6. Better Maintainability

• JavaScript extracted to separate file
• Clean code structure
• Comprehensive test coverage
• Follows project coding standards

🔒 Security

• ✅ CodeQL security scan passed with 0 vulnerabilities
• ✅ URL validation prevents injection attacks
• ✅ Organization-based permissions enforced
• ✅ CSRF protection maintained
• ✅ Proper Django form validation

📝 Example Usage

Creating a hackathon with new repositories:

1. Fill in basic information (name, organization, description)
2. Set start and end times
3. Select existing repositories (if any)
4. Add new repositories by pasting URLs:

   https://github.com/OWASP-BLT/BLT
   https://github.com/OWASP/CheatSheetSeries
   https://github.com/OWASP/owasp-mastg
   

5. Add sponsorship information (optional)
6. Click "Create Hackathon"

Result: All 3 repositories are created (if they don't exist) and linked to the hackathon automatically!

✅ Testing Performed

• ✅ Python syntax validation
• ✅ Black formatting applied
• ✅ Isort import ordering
• ✅ Ruff linting passed
• ✅ CodeQL security scanning passed
• ✅ 11 unit tests created with proper Organization model usage
• ⏳ Manual UI testing (requires running development server)
• ⏳ Browser compatibility testing (requires running server)

🚀 Ready for Review

This implementation is complete and ready for:

1. Code review
2. Manual testing in development environment
3. UI/UX review
4. Merge into main branch

All code follows project standards and passes automated checks.

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