X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/df65c10360344f2deb01bbe0536c8b2bc1657fb4..e129df379493789f749d7e92b6f1f29db192d01e:/nominatim/api/lookup.py diff --git a/nominatim/api/lookup.py b/nominatim/api/lookup.py index 410d030c..a46cdb69 100644 --- a/nominatim/api/lookup.py +++ b/nominatim/api/lookup.py @@ -7,35 +7,29 @@ """ Implementation of place lookup by ID. """ -from typing import Optional +from typing import Optional, Callable, Tuple, Type +import datetime as dt import sqlalchemy as sa -from nominatim.typing import SaColumn, SaLabel, SaRow +from nominatim.typing import SaColumn, SaRow, SaSelect from nominatim.api.connection import SearchConnection import nominatim.api.types as ntyp import nominatim.api.results as nres +from nominatim.api.logging import log -def _select_column_geometry(column: SaColumn, - geometry_output: ntyp.GeometryFormat) -> SaLabel: - """ Create the appropriate column expression for selecting a - geometry for the details response. - """ - if geometry_output & ntyp.GeometryFormat.GEOJSON: - return sa.literal_column(f""" - ST_AsGeoJSON(CASE WHEN ST_NPoints({0}) > 5000 - THEN ST_SimplifyPreserveTopology({0}, 0.0001) - ELSE {column.name} END) - """).label('geometry_geojson') +RowFunc = Callable[[Optional[SaRow], Type[nres.BaseResultT]], Optional[nres.BaseResultT]] + +GeomFunc = Callable[[SaSelect, SaColumn], SaSelect] - return sa.func.ST_GeometryType(column).label('geometry_type') async def find_in_placex(conn: SearchConnection, place: ntyp.PlaceRef, - details: ntyp.LookupDetails) -> Optional[SaRow]: + add_geometries: GeomFunc) -> Optional[SaRow]: """ Search for the given place in the placex table and return the base information. """ + log().section("Find in placex table") t = conn.t.placex sql = sa.select(t.c.place_id, t.c.osm_type, t.c.osm_id, t.c.name, t.c.class_, t.c.type, t.c.admin_level, @@ -44,9 +38,7 @@ async def find_in_placex(conn: SearchConnection, place: ntyp.PlaceRef, t.c.importance, t.c.wikipedia, t.c.indexed_date, t.c.parent_place_id, t.c.rank_address, t.c.rank_search, t.c.linked_place_id, - sa.func.ST_X(t.c.centroid).label('x'), - sa.func.ST_Y(t.c.centroid).label('y'), - _select_column_geometry(t.c.geometry, details.geometry_output)) + t.c.centroid) if isinstance(place, ntyp.PlaceID): sql = sql.where(t.c.place_id == place.place_id) @@ -61,21 +53,187 @@ async def find_in_placex(conn: SearchConnection, place: ntyp.PlaceRef, else: return None - return (await conn.execute(sql)).one_or_none() + return (await conn.execute(add_geometries(sql, t.c.geometry))).one_or_none() + + +async def find_in_osmline(conn: SearchConnection, place: ntyp.PlaceRef, + add_geometries: GeomFunc) -> Optional[SaRow]: + """ Search for the given place in the osmline table and return the + base information. + """ + log().section("Find in interpolation table") + t = conn.t.osmline + sql = sa.select(t.c.place_id, t.c.osm_id, t.c.parent_place_id, + t.c.indexed_date, t.c.startnumber, t.c.endnumber, + t.c.step, t.c.address, t.c.postcode, t.c.country_code, + t.c.linegeo.ST_Centroid().label('centroid')) + + if isinstance(place, ntyp.PlaceID): + sql = sql.where(t.c.place_id == place.place_id) + elif isinstance(place, ntyp.OsmID) and place.osm_type == 'W': + # There may be multiple interpolations for a single way. + # If 'class' contains a number, return the one that belongs to that number. + sql = sql.where(t.c.osm_id == place.osm_id).limit(1) + if place.osm_class and place.osm_class.isdigit(): + sql = sql.order_by(sa.func.greatest(0, + sa.func.least(int(place.osm_class) - t.c.endnumber), + t.c.startnumber - int(place.osm_class))) + else: + return None + + return (await conn.execute(add_geometries(sql, t.c.linegeo))).one_or_none() + + +async def find_in_tiger(conn: SearchConnection, place: ntyp.PlaceRef, + add_geometries: GeomFunc) -> Optional[SaRow]: + """ Search for the given place in the table of Tiger addresses and return + the base information. Only lookup by place ID is supported. + """ + if not isinstance(place, ntyp.PlaceID): + return None + + log().section("Find in TIGER table") + t = conn.t.tiger + parent = conn.t.placex + sql = sa.select(t.c.place_id, t.c.parent_place_id, + parent.c.osm_type, parent.c.osm_id, + t.c.startnumber, t.c.endnumber, t.c.step, + t.c.postcode, + t.c.linegeo.ST_Centroid().label('centroid'))\ + .where(t.c.place_id == place.place_id)\ + .join(parent, t.c.parent_place_id == parent.c.place_id, isouter=True) + + return (await conn.execute(add_geometries(sql, t.c.linegeo))).one_or_none() + + +async def find_in_postcode(conn: SearchConnection, place: ntyp.PlaceRef, + add_geometries: GeomFunc) -> Optional[SaRow]: + """ Search for the given place in the postcode table and return the + base information. Only lookup by place ID is supported. + """ + if not isinstance(place, ntyp.PlaceID): + return None + + log().section("Find in postcode table") + t = conn.t.postcode + sql = sa.select(t.c.place_id, t.c.parent_place_id, + t.c.rank_search, t.c.rank_address, + t.c.indexed_date, t.c.postcode, t.c.country_code, + t.c.geometry.label('centroid')) \ + .where(t.c.place_id == place.place_id) + + return (await conn.execute(add_geometries(sql, t.c.geometry))).one_or_none() + + +async def find_in_all_tables(conn: SearchConnection, place: ntyp.PlaceRef, + add_geometries: GeomFunc + ) -> Tuple[Optional[SaRow], RowFunc[nres.BaseResultT]]: + """ Search for the given place in all data tables + and return the base information. + """ + row = await find_in_placex(conn, place, add_geometries) + log().var_dump('Result (placex)', row) + if row is not None: + return row, nres.create_from_placex_row + + row = await find_in_osmline(conn, place, add_geometries) + log().var_dump('Result (osmline)', row) + if row is not None: + return row, nres.create_from_osmline_row + + row = await find_in_postcode(conn, place, add_geometries) + log().var_dump('Result (postcode)', row) + if row is not None: + return row, nres.create_from_postcode_row + + row = await find_in_tiger(conn, place, add_geometries) + log().var_dump('Result (tiger)', row) + return row, nres.create_from_tiger_row -async def get_place_by_id(conn: SearchConnection, place: ntyp.PlaceRef, - details: ntyp.LookupDetails) -> Optional[nres.SearchResult]: +async def get_detailed_place(conn: SearchConnection, place: ntyp.PlaceRef, + details: ntyp.LookupDetails) -> Optional[nres.DetailedResult]: """ Retrieve a place with additional details from the database. """ + log().function('get_detailed_place', place=place, details=details) + if details.geometry_output and details.geometry_output != ntyp.GeometryFormat.GEOJSON: raise ValueError("lookup only supports geojosn polygon output.") - row = await find_in_placex(conn, place, details) - if row is not None: - result = nres.create_from_placex_row(row=row) - await nres.add_result_details(conn, result, details) - return result + if details.geometry_output & ntyp.GeometryFormat.GEOJSON: + def _add_geometry(sql: SaSelect, column: SaColumn) -> SaSelect: + return sql.add_columns(sa.literal_column(f""" + ST_AsGeoJSON(CASE WHEN ST_NPoints({column.name}) > 5000 + THEN ST_SimplifyPreserveTopology({column.name}, 0.0001) + ELSE {column.name} END) + """).label('geometry_geojson')) + else: + def _add_geometry(sql: SaSelect, column: SaColumn) -> SaSelect: + return sql.add_columns(sa.func.ST_GeometryType(column).label('geometry_type')) + + row_func: RowFunc[nres.DetailedResult] + row, row_func = await find_in_all_tables(conn, place, _add_geometry) + + if row is None: + return None + + result = row_func(row, nres.DetailedResult) + assert result is not None + + # add missing details + assert result is not None + result.parent_place_id = row.parent_place_id + result.linked_place_id = getattr(row, 'linked_place_id', None) + result.admin_level = getattr(row, 'admin_level', 15) + indexed_date = getattr(row, 'indexed_date', None) + if indexed_date is not None: + result.indexed_date = indexed_date.replace(tzinfo=dt.timezone.utc) + + await nres.add_result_details(conn, [result], details) + + return result + + +async def get_simple_place(conn: SearchConnection, place: ntyp.PlaceRef, + details: ntyp.LookupDetails) -> Optional[nres.SearchResult]: + """ Retrieve a place as a simple search result from the database. + """ + log().function('get_simple_place', place=place, details=details) + + def _add_geometry(sql: SaSelect, col: SaColumn) -> SaSelect: + if not details.geometry_output: + return sql + + out = [] + + if details.geometry_simplification > 0.0: + col = sa.func.ST_SimplifyPreserveTopology(col, details.geometry_simplification) + + if details.geometry_output & ntyp.GeometryFormat.GEOJSON: + out.append(sa.func.ST_AsGeoJSON(col).label('geometry_geojson')) + if details.geometry_output & ntyp.GeometryFormat.TEXT: + out.append(sa.func.ST_AsText(col).label('geometry_text')) + if details.geometry_output & ntyp.GeometryFormat.KML: + out.append(sa.func.ST_AsKML(col).label('geometry_kml')) + if details.geometry_output & ntyp.GeometryFormat.SVG: + out.append(sa.func.ST_AsSVG(col).label('geometry_svg')) + + return sql.add_columns(*out) + + + row_func: RowFunc[nres.SearchResult] + row, row_func = await find_in_all_tables(conn, place, _add_geometry) + + if row is None: + return None + + result = row_func(row, nres.SearchResult) + assert result is not None + + # add missing details + assert result is not None + result.bbox = getattr(row, 'bbox', None) + + await nres.add_result_details(conn, [result], details) - # Nothing found under this ID. - return None + return result