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StarPunk/docs/design/v1.2.0/2025-12-09-media-display-validation.md
Phil Skentelbery f10d0679da feat(tags): Add database schema and tags module (v1.3.0 Phase 1) 
Implements tag/category system backend following microformats2 p-category specification.

Database changes:
- Migration 008: Add tags and note_tags tables
- Normalized tag storage (case-insensitive lookup, display name preserved)
- Indexes for performance

New module:
- starpunk/tags.py: Tag management functions
  - normalize_tag: Normalize tag strings
  - get_or_create_tag: Get or create tag records
  - add_tags_to_note: Associate tags with notes (replaces existing)
  - get_note_tags: Retrieve note tags (alphabetically ordered)
  - get_tag_by_name: Lookup tag by normalized name
  - get_notes_by_tag: Get all notes with specific tag
  - parse_tag_input: Parse comma-separated tag input

Model updates:
- Note.tags property (lazy-loaded, prefer pre-loading in routes)
- Note.to_dict() add include_tags parameter

CRUD updates:
- create_note() accepts tags parameter
- update_note() accepts tags parameter (None = no change, [] = remove all)

Micropub integration:
- Pass tags to create_note() (tags already extracted by extract_tags())
- Return tags in q=source response

Per design doc: docs/design/v1.3.0/microformats-tags-design.md

Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>
2025-12-10 11:24:23 -07:00

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Media Display Implementation Validation Report

Date: 2025-12-09 Developer: Agent-Developer Task: Validate existing media display implementation against architect's specification Specification: /docs/design/media-display-fixes.md

Executive Summary

Validated the complete media display implementation against the authoritative specification. All requirements successfully implemented - no gaps found. Added comprehensive security tests for HTML/JavaScript escaping. Fixed unrelated test fixture issues in test_media_upload.py.

Validation Results

1. CSS Implementation (static/css/style.css)

Status: PASS - Complete implementation

Lines 103-193: All CSS requirements from spec implemented:

  • ✓ .note-media container with proper margin and width
  • ✓ Single image full-width layout with :has() pseudo-class
  • ✓ Two-image side-by-side grid layout
  • ✓ Three/four-image 2x2 grid layout
  • ✓ Media item wrapper with Instagram-style square aspect ratio (1:1)
  • ✓ Image constraints with object-fit: cover for grid items
  • ✓ Single image natural aspect ratio with 500px max-height constraint
  • ✓ Figcaption hidden with display: none (captions for alt text only)
  • ✓ Mobile responsive adjustments (vertical stacking, 16:9 aspect)

Note: Implementation uses semantic <figure> elements as specified, not <div> elements.

2. Template Implementation

templates/partials/media.html

Status: PASS - Exact match to spec

  • ✓ Reusable display_media() macro defined
  • ✓ .note-media container
  • ✓ .media-item figure elements (semantic HTML)
  • ✓ Image with u-photo class for Microformats2
  • ✓ Alt text from caption or "Image" fallback
  • ✓ loading="lazy" for performance optimization
  • ✓ No visible figcaption (comment documents this decision)
  • ✓ Uses url_for('public.media_file', path=item.path) for URLs

templates/note.html

Status: PASS - Correct usage

  • ✓ Line 2: Imports display_media from partials/media.html
  • ✓ Line 17: Uses macro with {{ display_media(note.media) }}
  • ✓ Media displays at TOP before e-content (as per ADR-057)

templates/index.html

Status: PASS - Correct usage

  • ✓ Line 2: Imports display_media from partials/media.html
  • ✓ Line 29: Uses macro with {{ display_media(note.media) }}
  • ✓ Media preview between title and content

3. Route Handler Implementation (starpunk/routes/public.py)

index() function (lines 219-241)

Status: PASS - Exact match to spec

  • ✓ Imports get_note_media from starpunk.media
  • ✓ Fetches notes with list_notes(published_only=True, limit=20)
  • ✓ Loops through notes and fetches media for each
  • ✓ Attaches media using object.__setattr__(note, 'media', media) (frozen dataclass)
  • ✓ Renders template with media-enhanced notes

note() function (lines 244-277)

Status: PASS - Already implemented

  • ✓ Imports and uses get_note_media
  • ✓ Fetches and attaches media to note

_get_cached_notes() helper (lines 38-74)

Status: PASS - Feed integration

  • ✓ Feed caching also includes media attachment for each note

Security Validation

Security Test Implementation

File: tests/test_media_upload.py (lines 318-418)

Added comprehensive security test class TestMediaSecurityEscaping with three test methods:

  1. test_caption_html_escaped_in_alt_attribute

    • Tests malicious caption: <script>alert("XSS")</script><img src=x onerror=alert(1)>
    • Verifies HTML tags are escaped to &lt;script&gt;, &lt;img, etc.
    • Confirms XSS attack vectors are neutralized
    • Result: PASS - Jinja2 auto-escaping works correctly

  2. test_caption_quotes_escaped_in_alt_attribute

    • Tests quote injection: Image" onload="alert('XSS')
    • Verifies quotes are escaped to &#34; or &quot;
    • Confirms attribute breakout attempts fail
    • Result: PASS - Quote escaping prevents attribute injection

  3. test_caption_displayed_on_homepage

    • Tests malicious caption on homepage: <img src=x onerror=alert(1)>
    • Verifies same escaping on index page
    • Confirms consistent security across templates
    • Result: PASS - Homepage uses same secure macro

Security Findings

No security vulnerabilities found. Jinja2's auto-escaping properly handles:

  • HTML tags (<script>, <img>) → Escaped to entities
  • Quotes (", ') → Escaped to numeric entities
  • Special characters (<, >, &) → Escaped to named entities

The display_media macro in templates/partials/media.html does NOT use |safe filter on caption content, ensuring all user-provided text is escaped.

Additional Work Completed

Test Fixture Cleanup

Issue: All tests in test_media_upload.py referenced a non-existent db fixture parameter.

Fix: Removed unused db parameter from 11 test functions:

  • TestMediaSave: 3 tests fixed
  • TestMediaAttachment: 4 tests fixed
  • TestMediaDeletion: 2 tests fixed
  • TestMediaSecurityEscaping: 3 tests fixed (new)
  • Fixture sample_note: 1 fixture fixed

This was a pre-existing issue unrelated to the media display implementation, but blocked test execution.

Documentation Updates

Marked superseded design documents with status headers:

  1. docs/design/v1.2.0-media-css-design.md

    • Added "Status: Superseded by media-display-fixes.md" header
    • Explained this was an earlier design iteration

  2. docs/design/v1.1.2-caption-alttext-update.md

    • Added "Status: Superseded by media-display-fixes.md" header
    • Explained this was an earlier approach to caption handling

Test Results

New Security Tests

tests/test_media_upload.py::TestMediaSecurityEscaping
  test_caption_html_escaped_in_alt_attribute PASSED
  test_caption_quotes_escaped_in_alt_attribute PASSED
  test_caption_displayed_on_homepage PASSED

All Media Tests

tests/test_media_upload.py
  23 passed (including 3 new security tests)

Template and Route Tests

tests/test_templates.py: 37 passed
tests/test_routes_public.py: 20 passed

Total: 80 tests passed, 0 failed

Compliance with Specification

Spec Requirement Implementation Status
CSS media display rules style.css lines 103-193 ✓ Complete
Reusable media macro templates/partials/media.html ✓ Complete
note.html uses macro Line 2 import, line 17 usage ✓ Complete
index.html uses macro Line 2 import, line 29 usage ✓ Complete
index route fetches media public.py lines 236-239 ✓ Complete
Security: HTML escaping Jinja2 auto-escape, tested ✓ Verified
Accessibility: alt text Template uses item.caption or 'Image' ✓ Complete
Performance: lazy loading loading="lazy" attribute ✓ Complete
Responsive design Mobile breakpoint at 767px ✓ Complete

Architecture Compliance

The implementation follows all architectural principles from the spec:

  1. Consistency: Same media display logic on all pages via shared macro
  2. Responsive: Images adapt to viewport with grid layouts and aspect ratios
  3. Accessible: Alt text present, no visible captions (as designed)
  4. Performance: Lazy loading, efficient CSS selectors
  5. Standards: Proper Microformats2 (u-photo), semantic HTML (figure elements)

Recommendations

For Future Versions (Not V1)

The spec lists these as future enhancements:

  • Image optimization/resizing on upload (consider for v1.3)
  • WebP format with fallbacks (consider for v1.3)
  • Lightbox for full-size viewing (consider for v1.4)
  • Video/audio media support (consider for v2.0)
  • CDN integration (consider for production deployments)

For Immediate Use

No changes needed. Implementation is complete and ready for deployment.

Conclusion

Validation Result: COMPLETE SUCCESS

All components of the media display system are correctly implemented according to the architect's specification in docs/design/media-display-fixes.md. No gaps found. Security validated. Tests passing.

The three reported issues from the spec are resolved:

  1. ✓ Images constrained with responsive CSS
  2. ✓ Captions hidden (alt text only)
  3. ✓ Media displayed on homepage

This implementation is ready for production use.

Implementation Report: This validation confirms the existing implementation meets all architectural requirements. No additional development work required.

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