84e7a9906c
- "backend/search_service.py" - "backend/schemas.py" - "backend/routers/search.py" - "backend/tests/test_search.py" GSD-Task: S01/T01
119 lines
3.6 KiB
Python
119 lines
3.6 KiB
Python
"""Search endpoint for semantic + keyword search with graceful fallback."""
|
||
|
||
from __future__ import annotations
|
||
|
||
import logging
|
||
from typing import Annotated
|
||
|
||
from fastapi import APIRouter, Depends, Query
|
||
from sqlalchemy import func, select
|
||
from sqlalchemy.ext.asyncio import AsyncSession
|
||
|
||
from config import get_settings
|
||
from database import get_session
|
||
from models import Creator, TechniquePage
|
||
from schemas import (
|
||
SearchResponse,
|
||
SearchResultItem,
|
||
SuggestionItem,
|
||
SuggestionsResponse,
|
||
)
|
||
from search_service import SearchService
|
||
|
||
logger = logging.getLogger("chrysopedia.search.router")
|
||
|
||
router = APIRouter(prefix="/search", tags=["search"])
|
||
|
||
|
||
def _get_search_service() -> SearchService:
|
||
"""Build a SearchService from current settings."""
|
||
return SearchService(get_settings())
|
||
|
||
|
||
@router.get("", response_model=SearchResponse)
|
||
async def search(
|
||
q: Annotated[str, Query(max_length=500)] = "",
|
||
scope: Annotated[str, Query()] = "all",
|
||
limit: Annotated[int, Query(ge=1, le=100)] = 20,
|
||
db: AsyncSession = Depends(get_session),
|
||
) -> SearchResponse:
|
||
"""Semantic search with keyword fallback.
|
||
|
||
- **q**: Search query (max 500 chars). Empty → empty results.
|
||
- **scope**: ``all`` | ``topics`` | ``creators``. Invalid → defaults to ``all``.
|
||
- **limit**: Max results (1–100, default 20).
|
||
"""
|
||
svc = _get_search_service()
|
||
result = await svc.search(query=q, scope=scope, limit=limit, db=db)
|
||
return SearchResponse(
|
||
items=[SearchResultItem(**item) for item in result["items"]],
|
||
partial_matches=[SearchResultItem(**item) for item in result.get("partial_matches", [])],
|
||
total=result["total"],
|
||
query=result["query"],
|
||
fallback_used=result["fallback_used"],
|
||
)
|
||
|
||
|
||
@router.get("/suggestions", response_model=SuggestionsResponse)
|
||
async def suggestions(
|
||
db: AsyncSession = Depends(get_session),
|
||
) -> SuggestionsResponse:
|
||
"""Return popular search suggestions for autocomplete.
|
||
|
||
Combines top technique pages (by view_count), popular topic tags
|
||
(by technique count), and top creators (by view_count).
|
||
Returns 8–12 deduplicated items.
|
||
"""
|
||
seen: set[str] = set()
|
||
items: list[SuggestionItem] = []
|
||
|
||
def _add(text: str, type_: str) -> None:
|
||
key = text.lower()
|
||
if key not in seen:
|
||
seen.add(key)
|
||
items.append(SuggestionItem(text=text, type=type_))
|
||
|
||
# Top 4 technique pages by view_count
|
||
tp_stmt = (
|
||
select(TechniquePage.title)
|
||
.order_by(TechniquePage.view_count.desc(), TechniquePage.title)
|
||
.limit(4)
|
||
)
|
||
tp_result = await db.execute(tp_stmt)
|
||
for (title,) in tp_result.all():
|
||
_add(title, "technique")
|
||
|
||
# Top 4 topic tags by how many technique pages use them
|
||
# Unnest the topic_tags ARRAY and count occurrences
|
||
tag_unnest = (
|
||
select(
|
||
func.unnest(TechniquePage.topic_tags).label("tag"),
|
||
)
|
||
.where(TechniquePage.topic_tags.isnot(None))
|
||
.subquery()
|
||
)
|
||
tag_stmt = (
|
||
select(
|
||
tag_unnest.c.tag,
|
||
func.count().label("cnt"),
|
||
)
|
||
.group_by(tag_unnest.c.tag)
|
||
.order_by(func.count().desc(), tag_unnest.c.tag)
|
||
.limit(4)
|
||
)
|
||
tag_result = await db.execute(tag_stmt)
|
||
for tag, _cnt in tag_result.all():
|
||
_add(tag, "topic")
|
||
|
||
# Top 4 creators by view_count
|
||
cr_stmt = (
|
||
select(Creator.name)
|
||
.where(Creator.hidden.is_(False))
|
||
.order_by(Creator.view_count.desc(), Creator.name)
|
||
.limit(4)
|
||
)
|
||
cr_result = await db.execute(cr_stmt)
|
||
for (name,) in cr_result.all():
|
||
_add(name, "creator")
|
||
|
||
return SuggestionsResponse(suggestions=items)
|