split SearchResult type

Use adapted types for the different result types. This makes it
easier to have adapted output formatting and means there are only
result fields that are filled.

nominatim/api/lookup.py

@@ -8,6 +8,7 @@
 Implementation of place lookup by ID.
 """
 from typing import Optional
+import datetime as dt
 
 import sqlalchemy as sa
 
@@ -137,7 +138,7 @@ async def find_in_postcode(conn: SearchConnection, place: ntyp.PlaceRef,
 
 
 async def get_place_by_id(conn: SearchConnection, place: ntyp.PlaceRef,
-                          details: ntyp.LookupDetails) -> Optional[nres.SearchResult]:
+                          details: ntyp.LookupDetails) -> Optional[nres.DetailedResult]:
     """ Retrieve a place with additional details from the database.
     """
     log().function('get_place_by_id', place=place, details=details)
@@ -146,32 +147,35 @@ async def get_place_by_id(conn: SearchConnection, place: ntyp.PlaceRef,
         raise ValueError("lookup only supports geojosn polygon output.")
 
     row = await find_in_placex(conn, place, details)
+    log().var_dump('Result (placex)', row)
     if row is not None:
-        result = nres.create_from_placex_row(row)
-        log().var_dump('Result', result)
-        await nres.add_result_details(conn, result, details)
-        return result
+        result = nres.create_from_placex_row(row, nres.DetailedResult)
+    else:
+        row = await find_in_osmline(conn, place, details)
+        log().var_dump('Result (osmline)', row)
+        if row is not None:
+            result = nres.create_from_osmline_row(row, nres.DetailedResult)
+        else:
+            row = await find_in_postcode(conn, place, details)
+            log().var_dump('Result (postcode)', row)
+            if row is not None:
+                result = nres.create_from_postcode_row(row, nres.DetailedResult)
+            else:
+                row = await find_in_tiger(conn, place, details)
+                log().var_dump('Result (tiger)', row)
+                if row is not None:
+                    result = nres.create_from_tiger_row(row, nres.DetailedResult)
+                else:
+                    return None
 
-    row = await find_in_osmline(conn, place, details)
-    if row is not None:
-        result = nres.create_from_osmline_row(row)
-        log().var_dump('Result', result)
-        await nres.add_result_details(conn, result, details)
-        return result
+    # 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)
+    indexed_date = getattr(row, 'indexed_date', None)
+    if indexed_date is not None:
+        result.indexed_date = indexed_date.replace(tzinfo=dt.timezone.utc)
 
-    row = await find_in_postcode(conn, place, details)
-    if row is not None:
-        result = nres.create_from_postcode_row(row)
-        log().var_dump('Result', result)
-        await nres.add_result_details(conn, result, details)
-        return result
+    await nres.add_result_details(conn, result, details)
 
-    row = await find_in_tiger(conn, place, details)
-    if row is not None:
-        result = nres.create_from_tiger_row(row)
-        log().var_dump('Result', result)
-        await nres.add_result_details(conn, result, details)
-        return result
-
-    # Nothing found under this ID.
-    return None
+    return result