src/nominatim_api/v1/format_json.py

   1 # SPDX-License-Identifier: GPL-3.0-or-later
   2 #
   3 # This file is part of Nominatim. (https://nominatim.org)
   4 #
   5 # Copyright (C) 2024 by the Nominatim developer community.
   6 # For a full list of authors see the git log.
   7 """
   8 Helper functions for output of results in json formats.
   9 """
  10 from typing import Mapping, Any, Optional, Tuple, Union
  11
  12 from ..utils.json_writer import JsonWriter
  13 from ..results import AddressLines, ReverseResults, SearchResults
  14 from . import classtypes as cl
  15
  16
  17 def _write_osm_id(out: JsonWriter, osm_object: Optional[Tuple[str, int]]) -> None:
  18     if osm_object is not None:
  19         out.keyval_not_none('osm_type', cl.OSM_TYPE_NAME.get(osm_object[0], None))\
  20            .keyval('osm_id', osm_object[1])
  21
  22
  23 def _write_typed_address(out: JsonWriter, address: Optional[AddressLines],
  24                          country_code: Optional[str]) -> None:
  25     parts = {}
  26     for line in (address or []):
  27         if line.isaddress:
  28             if line.local_name:
  29                 label = cl.get_label_tag(line.category, line.extratags,
  30                                          line.rank_address, country_code)
  31                 if label not in parts:
  32                     parts[label] = line.local_name
  33             if line.names and 'ISO3166-2' in line.names and line.admin_level:
  34                 parts[f"ISO3166-2-lvl{line.admin_level}"] = line.names['ISO3166-2']
  35
  36     for k, v in parts.items():
  37         out.keyval(k, v)
  38
  39     if country_code:
  40         out.keyval('country_code', country_code)
  41
  42
  43 def _write_geocodejson_address(out: JsonWriter,
  44                                address: Optional[AddressLines],
  45                                obj_place_id: Optional[int],
  46                                country_code: Optional[str]) -> None:
  47     extra = {}
  48     for line in (address or []):
  49         if line.isaddress and line.local_name:
  50             if line.category[1] in ('postcode', 'postal_code'):
  51                 out.keyval('postcode', line.local_name)
  52             elif line.category[1] == 'house_number':
  53                 out.keyval('housenumber', line.local_name)
  54             elif ((obj_place_id is None or obj_place_id != line.place_id)
  55                   and line.rank_address >= 4 and line.rank_address < 28):
  56                 rank_name = GEOCODEJSON_RANKS[line.rank_address]
  57                 if rank_name not in extra:
  58                     extra[rank_name] = line.local_name
  59
  60     for k, v in extra.items():
  61         out.keyval(k, v)
  62
  63     if country_code:
  64         out.keyval('country_code', country_code)
  65
  66
  67 def format_base_json(results: Union[ReverseResults, SearchResults],
  68                      options: Mapping[str, Any], simple: bool,
  69                      class_label: str) -> str:
  70     """ Return the result list as a simple json string in custom Nominatim format.
  71     """
  72     out = JsonWriter()
  73
  74     if simple:
  75         if not results:
  76             return '{"error":"Unable to geocode"}'
  77     else:
  78         out.start_array()
  79
  80     for result in results:
  81         out.start_object()\
  82              .keyval_not_none('place_id', result.place_id)\
  83              .keyval('licence', cl.OSM_ATTRIBUTION)\
  84
  85         _write_osm_id(out, result.osm_object)
  86
  87         out.keyval('lat', f"{result.centroid.lat}")\
  88            .keyval('lon', f"{result.centroid.lon}")\
  89            .keyval(class_label, result.category[0])\
  90            .keyval('type', result.category[1])\
  91            .keyval('place_rank', result.rank_search)\
  92            .keyval('importance', result.calculated_importance())\
  93            .keyval('addresstype', cl.get_label_tag(result.category, result.extratags,
  94                                                    result.rank_address,
  95                                                    result.country_code))\
  96            .keyval('name', result.locale_name or '')\
  97            .keyval('display_name', result.display_name or '')
  98
  99         if options.get('icon_base_url', None):
 100             icon = cl.ICONS.get(result.category)
 101             if icon:
 102                 out.keyval('icon', f"{options['icon_base_url']}/{icon}.p.20.png")
 103
 104         if options.get('addressdetails', False):
 105             out.key('address').start_object()
 106             _write_typed_address(out, result.address_rows, result.country_code)
 107             out.end_object().next()
 108
 109         if options.get('extratags', False):
 110             out.keyval('extratags', result.extratags)
 111
 112         if options.get('namedetails', False):
 113             out.keyval('namedetails', result.names)
 114
 115         bbox = cl.bbox_from_result(result)
 116         out.key('boundingbox').start_array()\
 117            .value(f"{bbox.minlat:0.7f}").next()\
 118            .value(f"{bbox.maxlat:0.7f}").next()\
 119            .value(f"{bbox.minlon:0.7f}").next()\
 120            .value(f"{bbox.maxlon:0.7f}").next()\
 121            .end_array().next()
 122
 123         if result.geometry:
 124             for key in ('text', 'kml'):
 125                 out.keyval_not_none('geo' + key, result.geometry.get(key))
 126             if 'geojson' in result.geometry:
 127                 out.key('geojson').raw(result.geometry['geojson']).next()
 128             out.keyval_not_none('svg', result.geometry.get('svg'))
 129
 130         out.end_object()
 131
 132         if simple:
 133             return out()
 134
 135         out.next()
 136
 137     out.end_array()
 138
 139     return out()
 140
 141
 142 def format_base_geojson(results: Union[ReverseResults, SearchResults],
 143                         options: Mapping[str, Any],
 144                         simple: bool) -> str:
 145     """ Return the result list as a geojson string.
 146     """
 147     if not results and simple:
 148         return '{"error":"Unable to geocode"}'
 149
 150     out = JsonWriter()
 151
 152     out.start_object()\
 153        .keyval('type', 'FeatureCollection')\
 154        .keyval('licence', cl.OSM_ATTRIBUTION)\
 155        .key('features').start_array()
 156
 157     for result in results:
 158         out.start_object()\
 159              .keyval('type', 'Feature')\
 160              .key('properties').start_object()
 161
 162         out.keyval_not_none('place_id', result.place_id)
 163
 164         _write_osm_id(out, result.osm_object)
 165
 166         out.keyval('place_rank', result.rank_search)\
 167            .keyval('category', result.category[0])\
 168            .keyval('type', result.category[1])\
 169            .keyval('importance', result.calculated_importance())\
 170            .keyval('addresstype', cl.get_label_tag(result.category, result.extratags,
 171                                                    result.rank_address,
 172                                                    result.country_code))\
 173            .keyval('name', result.locale_name or '')\
 174            .keyval('display_name', result.display_name or '')
 175
 176         if options.get('addressdetails', False):
 177             out.key('address').start_object()
 178             _write_typed_address(out, result.address_rows, result.country_code)
 179             out.end_object().next()
 180
 181         if options.get('extratags', False):
 182             out.keyval('extratags', result.extratags)
 183
 184         if options.get('namedetails', False):
 185             out.keyval('namedetails', result.names)
 186
 187         out.end_object().next()  # properties
 188
 189         out.key('bbox').start_array()
 190         for coord in cl.bbox_from_result(result).coords:
 191             out.float(coord, 7).next()
 192         out.end_array().next()
 193
 194         out.key('geometry').raw(result.geometry.get('geojson')
 195                                 or result.centroid.to_geojson()).next()
 196
 197         out.end_object().next()
 198
 199     out.end_array().next().end_object()
 200
 201     return out()
 202
 203
 204 def format_base_geocodejson(results: Union[ReverseResults, SearchResults],
 205                             options: Mapping[str, Any], simple: bool) -> str:
 206     """ Return the result list as a geocodejson string.
 207     """
 208     if not results and simple:
 209         return '{"error":"Unable to geocode"}'
 210
 211     out = JsonWriter()
 212
 213     out.start_object()\
 214        .keyval('type', 'FeatureCollection')\
 215        .key('geocoding').start_object()\
 216                         .keyval('version', '0.1.0')\
 217                         .keyval('attribution', cl.OSM_ATTRIBUTION)\
 218                         .keyval('licence', 'ODbL')\
 219                         .keyval_not_none('query', options.get('query'))\
 220                         .end_object().next()\
 221        .key('features').start_array()
 222
 223     for result in results:
 224         out.start_object()\
 225              .keyval('type', 'Feature')\
 226              .key('properties').start_object()\
 227                                .key('geocoding').start_object()
 228
 229         out.keyval_not_none('place_id', result.place_id)
 230
 231         _write_osm_id(out, result.osm_object)
 232
 233         out.keyval('osm_key', result.category[0])\
 234            .keyval('osm_value', result.category[1])\
 235            .keyval('type', GEOCODEJSON_RANKS[max(3, min(28, result.rank_address))])\
 236            .keyval_not_none('accuracy', getattr(result, 'distance', None), transform=int)\
 237            .keyval('label', result.display_name or '')\
 238            .keyval_not_none('name', result.locale_name or None)\
 239
 240         if options.get('addressdetails', False):
 241             _write_geocodejson_address(out, result.address_rows, result.place_id,
 242                                        result.country_code)
 243
 244             out.key('admin').start_object()
 245             if result.address_rows:
 246                 for line in result.address_rows:
 247                     if line.isaddress and (line.admin_level or 15) < 15 and line.local_name \
 248                        and line.category[0] == 'boundary' and line.category[1] == 'administrative':
 249                         out.keyval(f"level{line.admin_level}", line.local_name)
 250             out.end_object().next()
 251
 252         out.end_object().next().end_object().next()
 253
 254         out.key('geometry').raw(result.geometry.get('geojson')
 255                                 or result.centroid.to_geojson()).next()
 256
 257         out.end_object().next()
 258
 259     out.end_array().next().end_object()
 260
 261     return out()
 262
 263
 264 GEOCODEJSON_RANKS = {
 265     3: 'locality',
 266     4: 'country',
 267     5: 'state', 6: 'state', 7: 'state', 8: 'state', 9: 'state',
 268     10: 'county', 11: 'county', 12: 'county',
 269     13: 'city', 14: 'city', 15: 'city', 16: 'city',
 270     17: 'district', 18: 'district', 19: 'district', 20: 'district', 21: 'district',
 271     22: 'locality', 23: 'locality', 24: 'locality',
 272     25: 'street', 26: 'street', 27: 'street', 28: 'house'}