📄 PHASE4_DELIVERABLES.md 4,799 bytes Apr 21, 2026 📋 Raw

Phase 4 Backend Deliverables - Complete

Delivered by: Socrates 🧠
Date: 2026-04-21
Status: ✅ Complete

Deliverables Summary

1. Search Endpoint (FTS5) ✅

Endpoint: GET /api/blog/search?q={query}

Features:
- Full-text search using SQLite FTS5 virtual table
- Searches across title, excerpt, and content
- Results ranked by relevance (using BM25 ranking algorithm)
- Configurable limit parameter (default 20, max 50)
- Only searches published posts
- Proper FTS5 query escaping (handles special characters like hyphens)

Implementation:
- service.py: search_posts() function
- storage.py: FTS5 virtual table with sync triggers
- router.py: /search endpoint with query parameter validation
- models.py: SearchResponse and SearchResult models

Endpoint: GET /api/blog/posts/{slug}/related?limit={n}

Algorithm:
- Posts in the same category score +2 points
- Each shared tag scores +1 point
- Results sorted by score (descending), then by publication date (descending)
- Returns only published posts
- Excludes the source post
- Respects the limit parameter (default 3, max 10)

Implementation:
- service.py: get_related_posts() function
- Uses efficient SQL with GROUP_CONCAT for tag matching
- Returns PostListResponse for consistent API response format

Files Created/Modified

Core Module Files

File	Description
`__init__.py`	Module initialization, exports `blog_router`
`models.py`	Pydantic models for requests/responses including SearchResponse
`storage.py`	SQLite + Markdown I/O, FTS5 schema, sync triggers
`service.py`	Business logic: search, related posts, CRUD operations
`router.py`	FastAPI routes including `/search` and `/{slug}/related`

Tests

File	Description
`test_phase4.py`	15 unit tests covering search and related posts
`test_integration.py`	Integration tests for API endpoints

Supporting Files

File	Description
`requirements.txt`	Dependencies (FastAPI, Pydantic, Markdown, PyYAML, pytest)
`main.py`	FastAPI application entry point
`PHASE4_DELIVERABLES.md`	This document

API Endpoints Summary

Public Endpoints

GET  /api/blog/posts              # List posts (paginated, filterable)
GET  /api/blog/posts/{slug}        # Get single post
GET  /api/blog/posts/{slug}/related # Get related posts (NEW ✅)
GET  /api/blog/categories          # List categories
GET  /api/blog/tags               # List tags
GET  /api/blog/search?q={query}   # Full-text search (NEW ✅)

Admin Endpoints (already working, confirmed)

GET    /api/blog/admin/posts                    # List all posts (with status filter)
POST   /api/blog/admin/posts                    # Create new post
GET    /api/blog/admin/posts/{slug}             # Get post (any status)
PATCH  /api/blog/admin/posts/{slug}             # Update post
DELETE /api/blog/admin/posts/{slug}            # Archive post
POST   /api/blog/admin/posts/{slug}/publish     # Publish draft
POST   /api/blog/admin/posts/{slug}/unpublish   # Unpublish to draft
POST   /api/blog/admin/posts/{slug}/preview     # Preview Markdown → HTML
POST   /api/blog/admin/posts/{slug}/regenerate  # Regenerate static HTML
POST   /api/blog/admin/rebuild                 # Full rebuild

Test Results

Phase 4 Unit Tests: 15/15 passed
- TestSearch: 5/5 passed
- TestRelatedPosts: 7/7 passed  
- TestSlugGeneration: 3/3 passed

Integration Tests: 6/6 passed
- Health check
- Root endpoint
- Empty posts listing
- Empty search
- Empty categories
- Empty tags

Database Schema (FTS5)

-- Full-text search virtual table
CREATE VIRTUAL TABLE posts_fts USING fts5(
    title,
    excerpt,
    content,
    content='posts',
    content_rowid='id'
);

-- Sync triggers keep FTS index in sync with posts table
CREATE TRIGGER posts_fts_insert AFTER INSERT ON posts ...
CREATE TRIGGER posts_fts_delete AFTER DELETE ON posts ...
CREATE TRIGGER posts_fts_update AFTER UPDATE ON posts ...

# Algorithm implemented in service.py:get_related_posts()
score = 0
if post.category == source.category:
    score += 2  # Same category bonus

shared_tags = post.tags & source.tags
score += len(shared_tags)  # +1 per shared tag

Next Steps

The Phase 4 backend deliverables are complete. Daedalus can now:

Wire the /search endpoint into the blog UI search box
Display related posts on individual article pages
Continue building admin UI templates (already has working API endpoints)

Ready for integration testing with Daedalus' frontend work.

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