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feat(geocode): add viewport bias for location-aware search

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- Add lat/lon/zoom params to geocode() and _retrieve_photon_freetext()
- Update nav_tools.py wrapper to pass through viewport params
- Add /api/geocode handler support for lat/lon/zoom query params
- Add _safe_float() helper for param validation
- Cast zoom to int for Photon compatibility

Allows the frontend to pass current map center/zoom to bias
search results toward the visible area.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Matt 2026-04-26 04:03:44 +00:00
commit 2ed9335f4e
3 changed files with 29 additions and 12 deletions
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17
lib/geocode.py
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@ -334,21 +334,20 @@ def _retrieve_photon_structured(parsed, limit=10):
return _parse_photon_features(data.get('features', []), 'photon')
def _retrieve_photon_freetext(query, limit=10):
def _retrieve_photon_freetext(query, limit=10, lat=None, lon=None, zoom=None):
"""Query Photon /api for free-text search with location bias."""
try:
params = {
'q': query,
'limit': limit,
'lat': GEOCODE_BIAS_LAT,
'lon': GEOCODE_BIAS_LON,
'zoom': GEOCODE_BIAS_ZOOM,
'lat': lat if lat is not None else GEOCODE_BIAS_LAT,
'lon': lon if lon is not None else GEOCODE_BIAS_LON,
'zoom': int(zoom) if zoom is not None else GEOCODE_BIAS_ZOOM,
}
resp = requests.get(f"{PHOTON_URL}/api", params=params, timeout=5)
resp.raise_for_status()
data = resp.json()
except Exception as e:
logger.debug("Photon /api failed: %s", e)
return []
return _parse_photon_features(data.get('features', []), 'photon')
@ -663,7 +662,7 @@ def _annotate_with_address_book(results):
# PUBLIC API
# ═══════════════════════════════════════════════════════════════════
def geocode(query, limit=10):
def geocode(query, limit=10, lat=None, lon=None, zoom=None):
"""
Structured geocoding with multi-source retrieval and reranking.
@ -731,7 +730,7 @@ def geocode(query, limit=10):
# Parallel: Netsyms (structured) + Photon (freetext with expanded query)
netsyms_results = _retrieve_netsyms(parsed, limit=limit)
photon_results = _retrieve_photon_freetext(
parsed.get('expanded_query', q), limit=limit
parsed.get('expanded_query', q), limit=limit, lat=lat, lon=lon, zoom=zoom
)
# Also try Photon /structured for addresses
photon_struct = _retrieve_photon_structured(parsed, limit=5)
@ -739,11 +738,11 @@ def geocode(query, limit=10):
elif intent == 'POSTCODE':
netsyms_results = _retrieve_netsyms(parsed, limit=limit)
photon_results = _retrieve_photon_freetext(q, limit=limit)
photon_results = _retrieve_photon_freetext(q, limit=limit, lat=lat, lon=lon, zoom=zoom)
candidates = netsyms_results + photon_results
elif intent in ('LOCALITY', 'POI', 'UNKNOWN'):
candidates = _retrieve_photon_freetext(q, limit=limit)
candidates = _retrieve_photon_freetext(q, limit=limit, lat=lat, lon=lon, zoom=zoom)
# ── Deduplicate by (lat, lon) proximity ──
deduped = []