X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/41da298b189949e24ff5271bcd671bf5f7b7a444..878a1d756d34169609ab64ee228d164bbf3bfad7:/nominatim/api/results.py

diff --git a/nominatim/api/results.py b/nominatim/api/results.py
index 84d4ced9..d425ff6c 100644
--- a/nominatim/api/results.py
+++ b/nominatim/api/results.py
@@ -11,21 +11,40 @@ Data classes are part of the public API while the functions are for
 internal use only. That's why they are implemented as free-standing functions
 instead of member functions.
 """
-from typing import Optional, Tuple, Dict, Sequence, TypeVar, Type
+from typing import Optional, Tuple, Dict, Sequence, TypeVar, Type, List, Any, Union
 import enum
 import dataclasses
 import datetime as dt
 
 import sqlalchemy as sa
 
-from nominatim.typing import SaSelect, SaRow
+from nominatim.typing import SaSelect, SaRow, SaColumn
 from nominatim.api.types import Point, Bbox, LookupDetails
 from nominatim.api.connection import SearchConnection
 from nominatim.api.logging import log
+from nominatim.api.localization import Locales
 
 # This file defines complex result data classes.
 # pylint: disable=too-many-instance-attributes
 
+def _mingle_name_tags(names: Optional[Dict[str, str]]) -> Optional[Dict[str, str]]:
+    """ Mix-in names from linked places, so that they show up
+        as standard names where necessary.
+    """
+    if not names:
+        return None
+
+    out = {}
+    for k, v in names.items():
+        if k.startswith('_place_'):
+            outkey = k[7:]
+            out[k if outkey in names else outkey] = v
+        else:
+            out[k] = v
+
+    return out
+
+
 class SourceTable(enum.Enum):
     """ Enumeration of kinds of results.
     """
@@ -46,16 +65,36 @@ class AddressLine:
     names: Dict[str, str]
     extratags: Optional[Dict[str, str]]
 
-    local_name: Optional[str] = None
-
     admin_level: Optional[int]
     fromarea: bool
     isaddress: bool
     rank_address: int
     distance: float
 
+    local_name: Optional[str] = None
+
+
+class AddressLines(List[AddressLine]):
+    """ Sequence of address lines order in descending order by their rank.
+    """
+
+    def localize(self, locales: Locales) -> List[str]:
+        """ Set the local name of address parts according to the chosen
+            locale. Return the list of local names without duplications.
+
+            Only address parts that are marked as isaddress are localized
+            and returned.
+        """
+        label_parts: List[str] = []
+
+        for line in self:
+            if line.isaddress and line.names:
+                line.local_name = locales.display_name(line.names)
+                if not label_parts or label_parts[-1] != line.local_name:
+                    label_parts.append(line.local_name)
+
+        return label_parts
 
-AddressLines = Sequence[AddressLine]
 
 
 @dataclasses.dataclass
@@ -81,7 +120,9 @@ class BaseResult:
 
     place_id : Optional[int] = None
     osm_object: Optional[Tuple[str, int]] = None
-    admin_level: int = 15
+
+    locale_name: Optional[str] = None
+    display_name: Optional[str] = None
 
     names: Optional[Dict[str, str]] = None
     address: Optional[Dict[str, str]] = None
@@ -126,6 +167,19 @@ class BaseResult:
         """
         return self.importance or (0.7500001 - (self.rank_search/40.0))
 
+
+    def localize(self, locales: Locales) -> None:
+        """ Fill the locale_name and the display_name field for the
+            place and, if available, its address information.
+        """
+        self.locale_name = locales.display_name(self.names)
+        if self.address_rows:
+            self.display_name = ', '.join(self.address_rows.localize(locales))
+        else:
+            self.display_name = self.locale_name
+
+
+
 BaseResultT = TypeVar('BaseResultT', bound=BaseResult)
 
 @dataclasses.dataclass
@@ -135,6 +189,7 @@ class DetailedResult(BaseResult):
     """
     parent_place_id: Optional[int] = None
     linked_place_id: Optional[int] = None
+    admin_level: int = 15
     indexed_date: Optional[dt.datetime] = None
 
 
@@ -146,6 +201,40 @@ class ReverseResult(BaseResult):
     bbox: Optional[Bbox] = None
 
 
+class ReverseResults(List[ReverseResult]):
+    """ Sequence of reverse lookup results ordered by distance.
+        May be empty when no result was found.
+    """
+
+
+@dataclasses.dataclass
+class SearchResult(BaseResult):
+    """ A search result for forward geocoding.
+    """
+    bbox: Optional[Bbox] = None
+    accuracy: float = 0.0
+
+
+    @property
+    def ranking(self) -> float:
+        """ Return the ranking, a combined measure of accuracy and importance.
+        """
+        return (self.accuracy if self.accuracy is not None else 1) \
+               - self.calculated_importance()
+
+
+class SearchResults(List[SearchResult]):
+    """ Sequence of forward lookup results ordered by relevance.
+        May be empty when no result was found.
+    """
+
+    def localize(self, locales: Locales) -> None:
+        """ Apply the given locales to all results.
+        """
+        for result in self:
+            result.localize(locales)
+
+
 def _filter_geometries(row: SaRow) -> Dict[str, str]:
     return {k[9:]: v for k, v in row._mapping.items() # pylint: disable=W0212
             if k.startswith('geometry_')}
@@ -164,8 +253,7 @@ def create_from_placex_row(row: Optional[SaRow],
                       place_id=row.place_id,
                       osm_object=(row.osm_type, row.osm_id),
                       category=(row.class_, row.type),
-                      admin_level=row.admin_level,
-                      names=row.name,
+                      names=_mingle_name_tags(row.name),
                       address=row.address,
                       extratags=row.extratags,
                       housenumber=row.housenumber,
@@ -175,7 +263,7 @@ def create_from_placex_row(row: Optional[SaRow],
                       rank_search=row.rank_search,
                       importance=row.importance,
                       country_code=row.country_code,
-                      centroid=Point.from_wkb(row.centroid.data),
+                      centroid=Point.from_wkb(row.centroid),
                       geometry=_filter_geometries(row))
 
 
@@ -200,7 +288,7 @@ def create_from_osmline_row(row: Optional[SaRow],
                      address=row.address,
                      postcode=row.postcode,
                      country_code=row.country_code,
-                     centroid=Point.from_wkb(row.centroid.data),
+                     centroid=Point.from_wkb(row.centroid),
                      geometry=_filter_geometries(row))
 
     if hnr is None:
@@ -214,7 +302,9 @@ def create_from_osmline_row(row: Optional[SaRow],
 
 
 def create_from_tiger_row(row: Optional[SaRow],
-                          class_type: Type[BaseResultT]) -> Optional[BaseResultT]:
+                          class_type: Type[BaseResultT],
+                          osm_type: Optional[str] = None,
+                          osm_id: Optional[int] = None) -> Optional[BaseResultT]:
     """ Construct a new result and add the data from the result row
         from the Tiger data interpolation table. 'class_type' defines
         the type of result to return. Returns None if the row is None.
@@ -229,10 +319,11 @@ def create_from_tiger_row(row: Optional[SaRow],
 
     res = class_type(source_table=SourceTable.TIGER,
                      place_id=row.place_id,
+                     osm_object=(osm_type or row.osm_type, osm_id or row.osm_id),
                      category=('place', 'houses' if hnr is None else 'house'),
                      postcode=row.postcode,
                      country_code='us',
-                     centroid=Point.from_wkb(row.centroid.data),
+                     centroid=Point.from_wkb(row.centroid),
                      geometry=_filter_geometries(row))
 
     if hnr is None:
@@ -261,41 +352,60 @@ def create_from_postcode_row(row: Optional[SaRow],
                       rank_search=row.rank_search,
                       rank_address=row.rank_address,
                       country_code=row.country_code,
-                      centroid=Point.from_wkb(row.centroid.data),
+                      centroid=Point.from_wkb(row.centroid),
                       geometry=_filter_geometries(row))
 
 
-async def add_result_details(conn: SearchConnection, result: BaseResult,
+def create_from_country_row(row: Optional[SaRow],
+                        class_type: Type[BaseResultT]) -> Optional[BaseResultT]:
+    """ Construct a new result and add the data from the result row
+        from the fallback country tables. 'class_type' defines
+        the type of result to return. Returns None if the row is None.
+    """
+    if row is None:
+        return None
+
+    return class_type(source_table=SourceTable.COUNTRY,
+                      category=('place', 'country'),
+                      centroid=Point.from_wkb(row.centroid),
+                      names=row.name,
+                      rank_address=4, rank_search=4,
+                      country_code=row.country_code)
+
+
+async def add_result_details(conn: SearchConnection, results: List[BaseResultT],
                              details: LookupDetails) -> None:
     """ Retrieve more details from the database according to the
         parameters specified in 'details'.
     """
-    log().section('Query details for result')
-    if details.address_details:
-        log().comment('Query address details')
-        await complete_address_details(conn, result)
-    if details.linked_places:
-        log().comment('Query linked places')
-        await complete_linked_places(conn, result)
-    if details.parented_places:
-        log().comment('Query parent places')
-        await complete_parented_places(conn, result)
-    if details.keywords:
-        log().comment('Query keywords')
-        await complete_keywords(conn, result)
+    if results:
+        log().section('Query details for result')
+        if details.address_details:
+            log().comment('Query address details')
+            await complete_address_details(conn, results)
+        if details.linked_places:
+            log().comment('Query linked places')
+            for result in results:
+                await complete_linked_places(conn, result)
+        if details.parented_places:
+            log().comment('Query parent places')
+            for result in results:
+                await complete_parented_places(conn, result)
+        if details.keywords:
+            log().comment('Query keywords')
+            for result in results:
+                await complete_keywords(conn, result)
 
 
 def _result_row_to_address_row(row: SaRow) -> AddressLine:
     """ Create a new AddressLine from the results of a datbase query.
     """
     extratags: Dict[str, str] = getattr(row, 'extratags', {})
-    if 'place_type' in row:
-        extratags['place_type'] = row.place_type
+    if hasattr(row, 'place_type') and row.place_type:
+        extratags['place'] = row.place_type
 
-    names = row.name
+    names = _mingle_name_tags(row.name) or {}
     if getattr(row, 'housenumber', None) is not None:
-        if names is None:
-            names = {}
         names['housenumber'] = row.housenumber
 
     return AddressLine(place_id=row.place_id,
@@ -310,35 +420,88 @@ def _result_row_to_address_row(row: SaRow) -> AddressLine:
                        distance=row.distance)
 
 
-async def complete_address_details(conn: SearchConnection, result: BaseResult) -> None:
+def _get_housenumber_details(results: List[BaseResultT]) -> Tuple[List[int], List[int]]:
+    places = []
+    hnrs = []
+    for result in results:
+        if result.place_id:
+            housenumber = -1
+            if result.source_table in (SourceTable.TIGER, SourceTable.OSMLINE):
+                if result.housenumber is not None:
+                    housenumber = int(result.housenumber)
+                elif result.extratags is not None and 'startnumber' in result.extratags:
+                    # details requests do not come with a specific house number
+                    housenumber = int(result.extratags['startnumber'])
+            places.append(result.place_id)
+            hnrs.append(housenumber)
+
+    return places, hnrs
+
+
+async def complete_address_details(conn: SearchConnection, results: List[BaseResultT]) -> None:
     """ Retrieve information about places that make up the address of the result.
     """
-    housenumber = -1
-    if result.source_table in (SourceTable.TIGER, SourceTable.OSMLINE):
-        if result.housenumber is not None:
-            housenumber = int(result.housenumber)
-        elif result.extratags is not None and 'startnumber' in result.extratags:
-            # details requests do not come with a specific house number
-            housenumber = int(result.extratags['startnumber'])
-
-    sfn = sa.func.get_addressdata(result.place_id, housenumber)\
-            .table_valued( # type: ignore[no-untyped-call]
-                sa.column('place_id', type_=sa.Integer),
-                'osm_type',
-                sa.column('osm_id', type_=sa.BigInteger),
-                sa.column('name', type_=conn.t.types.Composite),
-                'class', 'type', 'place_type',
-                sa.column('admin_level', type_=sa.Integer),
-                sa.column('fromarea', type_=sa.Boolean),
-                sa.column('isaddress', type_=sa.Boolean),
-                sa.column('rank_address', type_=sa.SmallInteger),
-                sa.column('distance', type_=sa.Float))
-    sql = sa.select(sfn).order_by(sa.column('rank_address').desc(),
-                                  sa.column('isaddress').desc())
-
-    result.address_rows = []
+    places, hnrs = _get_housenumber_details(results)
+
+    if not places:
+        return
+
+    def _get_addressdata(place_id: Union[int, SaColumn], hnr: Union[int, SaColumn]) -> Any:
+        return sa.func.get_addressdata(place_id, hnr)\
+                    .table_valued( # type: ignore[no-untyped-call]
+                        sa.column('place_id', type_=sa.Integer),
+                        'osm_type',
+                        sa.column('osm_id', type_=sa.BigInteger),
+                        sa.column('name', type_=conn.t.types.Composite),
+                        'class', 'type', 'place_type',
+                        sa.column('admin_level', type_=sa.Integer),
+                        sa.column('fromarea', type_=sa.Boolean),
+                        sa.column('isaddress', type_=sa.Boolean),
+                        sa.column('rank_address', type_=sa.SmallInteger),
+                        sa.column('distance', type_=sa.Float),
+                        joins_implicitly=True)
+
+
+    if len(places) == 1:
+        # Optimized case for exactly one result (reverse)
+        sql = sa.select(_get_addressdata(places[0], hnrs[0]))\
+                .order_by(sa.column('rank_address').desc(),
+                          sa.column('isaddress').desc())
+
+        alines = AddressLines()
+        for row in await conn.execute(sql):
+            alines.append(_result_row_to_address_row(row))
+
+        for result in results:
+            if result.place_id == places[0]:
+                result.address_rows = alines
+                return
+
+
+    darray = sa.func.unnest(conn.t.types.to_array(places), conn.t.types.to_array(hnrs))\
+                    .table_valued( # type: ignore[no-untyped-call]
+                       sa.column('place_id', type_= sa.Integer),
+                       sa.column('housenumber', type_= sa.Integer)
+                    ).render_derived()
+
+    sfn = _get_addressdata(darray.c.place_id, darray.c.housenumber)
+
+    sql = sa.select(darray.c.place_id.label('result_place_id'), sfn)\
+            .order_by(darray.c.place_id,
+                      sa.column('rank_address').desc(),
+                      sa.column('isaddress').desc())
+
+    current_result = None
     for row in await conn.execute(sql):
-        result.address_rows.append(_result_row_to_address_row(row))
+        if current_result is None or row.result_place_id != current_result.place_id:
+            for result in results:
+                if result.place_id == row.result_place_id:
+                    current_result = result
+                    break
+            else:
+                assert False
+            current_result.address_rows = AddressLines()
+        current_result.address_rows.append(_result_row_to_address_row(row))
 
 
 # pylint: disable=consider-using-f-string
@@ -360,7 +523,7 @@ def _placex_select_address_row(conn: SearchConnection,
 async def complete_linked_places(conn: SearchConnection, result: BaseResult) -> None:
     """ Retrieve information about places that link to the result.
     """
-    result.linked_rows = []
+    result.linked_rows = AddressLines()
     if result.source_table != SourceTable.PLACEX:
         return
 
@@ -373,6 +536,9 @@ async def complete_linked_places(conn: SearchConnection, result: BaseResult) ->
 
 async def complete_keywords(conn: SearchConnection, result: BaseResult) -> None:
     """ Retrieve information about the search terms used for this place.
+
+        Requires that the query analyzer was initialised to get access to
+        the word table.
     """
     t = conn.t.search_name
     sql = sa.select(t.c.name_vector, t.c.nameaddress_vector)\
@@ -380,10 +546,11 @@ async def complete_keywords(conn: SearchConnection, result: BaseResult) -> None:
 
     result.name_keywords = []
     result.address_keywords = []
-    for name_tokens, address_tokens in await conn.execute(sql):
-        t = conn.t.word
-        sel = sa.select(t.c.word_id, t.c.word_token, t.c.word)
 
+    t = conn.t.meta.tables['word']
+    sel = sa.select(t.c.word_id, t.c.word_token, t.c.word)
+
+    for name_tokens, address_tokens in await conn.execute(sql):
         for row in await conn.execute(sel.where(t.c.word_id == sa.any_(name_tokens))):
             result.name_keywords.append(WordInfo(*row))
 
@@ -395,7 +562,7 @@ async def complete_parented_places(conn: SearchConnection, result: BaseResult) -
     """ Retrieve information about places that the result provides the
         address for.
     """
-    result.parented_rows = []
+    result.parented_rows = AddressLines()
     if result.source_table != SourceTable.PLACEX:
         return