Merge pull request #3006 from biswajit-k/generalize-filter

[nominatim.git] / nominatim / api / results.py

diff --git a/nominatim/api/results.py b/nominatim/api/results.py
index 23cb47f40f1b8a63237a1517ff332434087c44e0..98b13380726e98361bc2571c85bd78928c1afc12 100644 (file)
--- a/nominatim/api/results.py
+++ b/nominatim/api/results.py
@@ -11,7 +11,7 @@ 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.
 """
 internal use only. That's why they are implemented as free-standing functions
 instead of member functions.
 """

-from typing import Optional, Tuple, Dict, Sequence
+from typing import Optional, Tuple, Dict, Sequence, TypeVar, Type, List

 import enum
 import dataclasses
 import datetime as dt
 import enum
 import dataclasses
 import datetime as dt


@@ -19,9 +19,10 @@ import datetime as dt
 import sqlalchemy as sa
 
 from nominatim.typing import SaSelect, SaRow
 import sqlalchemy as sa
 
 from nominatim.typing import SaSelect, SaRow

-from nominatim.api.types import Point, LookupDetails
+from nominatim.api.types import Point, Bbox, LookupDetails

 from nominatim.api.connection import SearchConnection
 from nominatim.api.logging import log
 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
 
 # This file defines complex result data classes.
 # pylint: disable=too-many-instance-attributes


@@ -52,8 +53,30 @@ class AddressLine:
     rank_address: int
     distance: float
 
     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
 
 
 @dataclasses.dataclass


@@ -69,18 +92,16 @@ WordInfos = Sequence[WordInfo]
 
 
 @dataclasses.dataclass
 
 
 @dataclasses.dataclass

-class SearchResult:
-    """ Data class collecting all available information about a search result.
+class BaseResult:
+    """ Data class collecting information common to all
+        types of search results.

     """
     source_table: SourceTable
     category: Tuple[str, str]
     centroid: Point
 
     place_id : Optional[int] = None
     """
     source_table: SourceTable
     category: Tuple[str, str]
     centroid: Point
 
     place_id : Optional[int] = None

-    parent_place_id: Optional[int] = None
-    linked_place_id: Optional[int] = None

     osm_object: Optional[Tuple[str, int]] = None
     osm_object: Optional[Tuple[str, int]] = None

-    admin_level: int = 15

 
     names: Optional[Dict[str, str]] = None
     address: Optional[Dict[str, str]] = None
 
     names: Optional[Dict[str, str]] = None
     address: Optional[Dict[str, str]] = None


@@ -96,8 +117,6 @@ class SearchResult:
 
     country_code: Optional[str] = None
 
 
     country_code: Optional[str] = None
 

-    indexed_date: Optional[dt.datetime] = None
-

     address_rows: Optional[AddressLines] = None
     linked_rows: Optional[AddressLines] = None
     parented_rows: Optional[AddressLines] = None
     address_rows: Optional[AddressLines] = None
     linked_rows: Optional[AddressLines] = None
     parented_rows: Optional[AddressLines] = None


@@ -106,10 +125,6 @@ class SearchResult:
 
     geometry: Dict[str, str] = dataclasses.field(default_factory=dict)
 
 
     geometry: Dict[str, str] = dataclasses.field(default_factory=dict)
 

-    def __post_init__(self) -> None:
-        if self.indexed_date is not None and self.indexed_date.tzinfo is None:
-            self.indexed_date = self.indexed_date.replace(tzinfo=dt.timezone.utc)
-

     @property
     def lat(self) -> float:
         """ Get the latitude (or y) of the center point of the place.
     @property
     def lat(self) -> float:
         """ Get the latitude (or y) of the center point of the place.


@@ -131,12 +146,44 @@ class SearchResult:
         """
         return self.importance or (0.7500001 - (self.rank_search/40.0))
 
         """
         return self.importance or (0.7500001 - (self.rank_search/40.0))
 

+BaseResultT = TypeVar('BaseResultT', bound=BaseResult)

 
 

-    # pylint: disable=consider-using-f-string
-    def centroid_as_geojson(self) -> str:
-        """ Get the centroid in GeoJSON format.
-        """
-        return '{"type": "Point","coordinates": [%f, %f]}' % self.centroid
+@dataclasses.dataclass
+class DetailedResult(BaseResult):
+    """ A search result with more internal information from the database
+        added.
+    """
+    parent_place_id: Optional[int] = None
+    linked_place_id: Optional[int] = None
+    admin_level: int = 15
+    indexed_date: Optional[dt.datetime] = None
+
+
+@dataclasses.dataclass
+class ReverseResult(BaseResult):
+    """ A search result for reverse geocoding.
+    """
+    distance: Optional[float] = None
+    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
+
+
+class SearchResults(List[SearchResult]):
+    """ Sequence of forward lookup results ordered by relevance.
+        May be empty when no result was found.
+    """

 
 
 def _filter_geometries(row: SaRow) -> Dict[str, str]:
 
 
 def _filter_geometries(row: SaRow) -> Dict[str, str]:


@@ -144,87 +191,121 @@ def _filter_geometries(row: SaRow) -> Dict[str, str]:
             if k.startswith('geometry_')}
 
 
             if k.startswith('geometry_')}
 
 

-def create_from_placex_row(row: SaRow) -> SearchResult:
-    """ Construct a new SearchResult and add the data from the result row
-        from the placex table.
+def create_from_placex_row(row: Optional[SaRow],
+                           class_type: Type[BaseResultT]) -> Optional[BaseResultT]:
+    """ Construct a new result and add the data from the result row
+        from the placex table. 'class_type' defines the type of result
+        to return. Returns None if the row is None.

     """
     """

-    return SearchResult(source_table=SourceTable.PLACEX,
-                        place_id=row.place_id,
-                        parent_place_id=row.parent_place_id,
-                        linked_place_id=row.linked_place_id,
-                        osm_object=(row.osm_type, row.osm_id),
-                        category=(row.class_, row.type),
-                        admin_level=row.admin_level,
-                        names=row.name,
-                        address=row.address,
-                        extratags=row.extratags,
-                        housenumber=row.housenumber,
-                        postcode=row.postcode,
-                        wikipedia=row.wikipedia,
-                        rank_address=row.rank_address,
-                        rank_search=row.rank_search,
-                        importance=row.importance,
-                        country_code=row.country_code,
-                        indexed_date=getattr(row, 'indexed_date'),
-                        centroid=Point(row.x, row.y),
-                        geometry=_filter_geometries(row))
-
-
-def create_from_osmline_row(row: SaRow) -> SearchResult:
-    """ Construct a new SearchResult and add the data from the result row
-        from the osmline table.
+    if row is None:
+        return None
+
+    return class_type(source_table=SourceTable.PLACEX,
+                      place_id=row.place_id,
+                      osm_object=(row.osm_type, row.osm_id),
+                      category=(row.class_, row.type),
+                      names=row.name,
+                      address=row.address,
+                      extratags=row.extratags,
+                      housenumber=row.housenumber,
+                      postcode=row.postcode,
+                      wikipedia=row.wikipedia,
+                      rank_address=row.rank_address,
+                      rank_search=row.rank_search,
+                      importance=row.importance,
+                      country_code=row.country_code,
+                      centroid=Point.from_wkb(row.centroid.data),
+                      geometry=_filter_geometries(row))
+
+
+def create_from_osmline_row(row: Optional[SaRow],
+                            class_type: Type[BaseResultT]) -> Optional[BaseResultT]:
+    """ Construct a new result and add the data from the result row
+        from the address interpolation table osmline. 'class_type' defines
+        the type of result to return. Returns None if the row is None.
+
+        If the row contains a housenumber, then the housenumber is filled out.
+        Otherwise the result contains the interpolation information in extratags.

     """
     """

-    return SearchResult(source_table=SourceTable.OSMLINE,
-                        place_id=row.place_id,
-                        parent_place_id=row.parent_place_id,
-                        osm_object=('W', row.osm_id),
-                        category=('place', 'houses'),
-                        address=row.address,
-                        postcode=row.postcode,
-                        extratags={'startnumber': str(row.startnumber),
-                                   'endnumber': str(row.endnumber),
-                                   'step': str(row.step)},
-                        country_code=row.country_code,
-                        indexed_date=getattr(row, 'indexed_date'),
-                        centroid=Point(row.x, row.y),
-                        geometry=_filter_geometries(row))
-
-
-def create_from_tiger_row(row: SaRow) -> SearchResult:
-    """ Construct a new SearchResult and add the data from the result row
-        from the Tiger table.
+    if row is None:
+        return None
+
+    hnr = getattr(row, 'housenumber', None)
+
+    res = class_type(source_table=SourceTable.OSMLINE,
+                     place_id=row.place_id,
+                     osm_object=('W', row.osm_id),
+                     category=('place', 'houses' if hnr is None else 'house'),
+                     address=row.address,
+                     postcode=row.postcode,
+                     country_code=row.country_code,
+                     centroid=Point.from_wkb(row.centroid.data),
+                     geometry=_filter_geometries(row))
+
+    if hnr is None:
+        res.extratags = {'startnumber': str(row.startnumber),
+                         'endnumber': str(row.endnumber),
+                         'step': str(row.step)}
+    else:
+        res.housenumber = str(hnr)
+
+    return res
+
+
+def create_from_tiger_row(row: Optional[SaRow],
+                          class_type: Type[BaseResultT]) -> 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.
+
+        If the row contains a housenumber, then the housenumber is filled out.
+        Otherwise the result contains the interpolation information in extratags.

     """
     """

-    return SearchResult(source_table=SourceTable.TIGER,
-                        place_id=row.place_id,
-                        parent_place_id=row.parent_place_id,
-                        category=('place', 'houses'),
-                        postcode=row.postcode,
-                        extratags={'startnumber': str(row.startnumber),
-                                   'endnumber': str(row.endnumber),
-                                   'step': str(row.step)},
-                        country_code='us',
-                        centroid=Point(row.x, row.y),
-                        geometry=_filter_geometries(row))
-
-
-def create_from_postcode_row(row: SaRow) -> SearchResult:
-    """ Construct a new SearchResult and add the data from the result row
-        from the postcode centroid table.
+    if row is None:
+        return None
+
+    hnr = getattr(row, 'housenumber', None)
+
+    res = class_type(source_table=SourceTable.TIGER,
+                     place_id=row.place_id,
+                     osm_object=(row.osm_type, 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),
+                     geometry=_filter_geometries(row))
+
+    if hnr is None:
+        res.extratags = {'startnumber': str(row.startnumber),
+                         'endnumber': str(row.endnumber),
+                         'step': str(row.step)}
+    else:
+        res.housenumber = str(hnr)
+
+    return res
+
+
+def create_from_postcode_row(row: Optional[SaRow],
+                          class_type: Type[BaseResultT]) -> Optional[BaseResultT]:
+    """ Construct a new result and add the data from the result row
+        from the postcode table. 'class_type' defines
+        the type of result to return. Returns None if the row is None.

     """
     """

-    return SearchResult(source_table=SourceTable.POSTCODE,
-                        place_id=row.place_id,
-                        parent_place_id=row.parent_place_id,
-                        category=('place', 'postcode'),
-                        names={'ref': row.postcode},
-                        rank_search=row.rank_search,
-                        rank_address=row.rank_address,
-                        country_code=row.country_code,
-                        centroid=Point(row.x, row.y),
-                        indexed_date=row.indexed_date,
-                        geometry=_filter_geometries(row))
-
-
-async def add_result_details(conn: SearchConnection, result: SearchResult,
+    if row is None:
+        return None
+
+    return class_type(source_table=SourceTable.POSTCODE,
+                      place_id=row.place_id,
+                      category=('place', 'postcode'),
+                      names={'ref': row.postcode},
+                      rank_search=row.rank_search,
+                      rank_address=row.rank_address,
+                      country_code=row.country_code,
+                      centroid=Point.from_wkb(row.centroid.data),
+                      geometry=_filter_geometries(row))
+
+
+async def add_result_details(conn: SearchConnection, result: BaseResult,

                              details: LookupDetails) -> None:
     """ Retrieve more details from the database according to the
         parameters specified in 'details'.
                              details: LookupDetails) -> None:
     """ Retrieve more details from the database according to the
         parameters specified in 'details'.


@@ -248,8 +329,8 @@ 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', {})
     """ 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
     if getattr(row, 'housenumber', None) is not None:
 
     names = row.name
     if getattr(row, 'housenumber', None) is not None:


@@ -269,7 +350,7 @@ def _result_row_to_address_row(row: SaRow) -> AddressLine:
                        distance=row.distance)
 
 
                        distance=row.distance)
 
 

-async def complete_address_details(conn: SearchConnection, result: SearchResult) -> None:
+async def complete_address_details(conn: SearchConnection, result: BaseResult) -> None:

     """ Retrieve information about places that make up the address of the result.
     """
     housenumber = -1
     """ Retrieve information about places that make up the address of the result.
     """
     housenumber = -1


@@ -295,10 +376,11 @@ async def complete_address_details(conn: SearchConnection, result: SearchResult)
     sql = sa.select(sfn).order_by(sa.column('rank_address').desc(),
                                   sa.column('isaddress').desc())
 
     sql = sa.select(sfn).order_by(sa.column('rank_address').desc(),
                                   sa.column('isaddress').desc())
 

-    result.address_rows = []
+    result.address_rows = AddressLines()

     for row in await conn.execute(sql):
         result.address_rows.append(_result_row_to_address_row(row))
 
     for row in await conn.execute(sql):
         result.address_rows.append(_result_row_to_address_row(row))
 

+

 # pylint: disable=consider-using-f-string
 def _placex_select_address_row(conn: SearchConnection,
                                centroid: Point) -> SaSelect:
 # pylint: disable=consider-using-f-string
 def _placex_select_address_row(conn: SearchConnection,
                                centroid: Point) -> SaSelect:


@@ -315,10 +397,10 @@ def _placex_select_address_row(conn: SearchConnection,
                          """ % centroid).label('distance'))
 
 
                          """ % centroid).label('distance'))
 
 

-async def complete_linked_places(conn: SearchConnection, result: SearchResult) -> None:
+async def complete_linked_places(conn: SearchConnection, result: BaseResult) -> None:

     """ Retrieve information about places that link to the result.
     """
     """ Retrieve information about places that link to the result.
     """

-    result.linked_rows = []
+    result.linked_rows = AddressLines()

     if result.source_table != SourceTable.PLACEX:
         return
 
     if result.source_table != SourceTable.PLACEX:
         return
 


@@ -329,7 +411,7 @@ async def complete_linked_places(conn: SearchConnection, result: SearchResult) -
         result.linked_rows.append(_result_row_to_address_row(row))
 
 
         result.linked_rows.append(_result_row_to_address_row(row))
 
 

-async def complete_keywords(conn: SearchConnection, result: SearchResult) -> None:
+async def complete_keywords(conn: SearchConnection, result: BaseResult) -> None:

     """ Retrieve information about the search terms used for this place.
     """
     t = conn.t.search_name
     """ Retrieve information about the search terms used for this place.
     """
     t = conn.t.search_name


@@ -349,11 +431,11 @@ async def complete_keywords(conn: SearchConnection, result: SearchResult) -> Non
             result.address_keywords.append(WordInfo(*row))
 
 
             result.address_keywords.append(WordInfo(*row))
 
 

-async def complete_parented_places(conn: SearchConnection, result: SearchResult) -> None:
+async def complete_parented_places(conn: SearchConnection, result: BaseResult) -> None:

     """ Retrieve information about places that the result provides the
         address for.
     """
     """ 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
 
     if result.source_table != SourceTable.PLACEX:
         return