from itertools import chain from django.db.models import Prefetch, Q from django.urls import Resolver404, resolve from django.utils.functional import cached_property from django.utils.translation import ugettext_lazy as _ from rest_framework.authentication import SessionAuthentication from rest_framework.decorators import action from rest_framework.exceptions import NotFound, PermissionDenied, ValidationError from rest_framework.generics import get_object_or_404 from rest_framework.response import Response from rest_framework.viewsets import ReadOnlyModelViewSet, ViewSet from shapely.ops import cascaded_union from c3nav.editor.models import ChangeSet from c3nav.editor.views.base import etag_func from c3nav.mapdata.api import api_etag from c3nav.mapdata.models import Area, Door, MapUpdate, Source from c3nav.mapdata.models.geometry.space import POI from c3nav.mapdata.utils.user import can_access_editor class EditorViewSet(ViewSet): """ Editor API /geometries/ returns a list of geojson features, you have to specify ?level= or ?space= /geometrystyles/ returns styling information for all geometry types /bounds/ returns the maximum bounds of the map """ lookup_field = 'path' lookup_value_regex = r'.+' @staticmethod def _get_level_geometries(level): buildings = level.buildings.all() buildings_geom = cascaded_union([building.geometry for building in buildings]) spaces = {space.pk: space for space in level.spaces.all()} holes_geom = [] for space in spaces.values(): if space.outside: space.geometry = space.geometry.difference(buildings_geom) columns_geom = cascaded_union([column.geometry for column in space.columns.all()]) space.geometry = space.geometry.difference(columns_geom) space_holes_geom = cascaded_union([hole.geometry for hole in space.holes.all()]) holes_geom.append(space_holes_geom.intersection(space.geometry)) space.geometry = space.geometry.difference(space_holes_geom) holes_geom = cascaded_union(holes_geom) for building in buildings: building.original_geometry = building.geometry for obj in buildings: obj.geometry = obj.geometry.difference(holes_geom) results = [] results.extend(buildings) for door in level.doors.all(): results.append(door) results.extend(spaces.values()) return results @staticmethod def _get_levels_pk(request, level): # noinspection PyPep8Naming Level = request.changeset.wrap_model('Level') levels_under = () levels_on_top = () lower_level = level.lower(Level).first() primary_levels = (level,) + ((lower_level,) if lower_level else ()) secondary_levels = Level.objects.filter(on_top_of__in=primary_levels).values_list('pk', 'on_top_of') if lower_level: levels_under = tuple(pk for pk, on_top_of in secondary_levels if on_top_of == lower_level.pk) if True: levels_on_top = tuple(pk for pk, on_top_of in secondary_levels if on_top_of == level.pk) levels = chain([level.pk], levels_under, levels_on_top) return levels, levels_on_top, levels_under # noinspection PyPep8Naming @action(detail=False, methods=['get']) @api_etag(etag_func=etag_func, cache_parameters={'level': str, 'space': str}) def geometries(self, request, *args, **kwargs): if not can_access_editor(request): raise PermissionDenied Level = request.changeset.wrap_model('Level') Space = request.changeset.wrap_model('Space') level = request.GET.get('level') space = request.GET.get('space') if level is not None: if space is not None: raise ValidationError('Only level or space can be specified.') if not request.user_permissions.can_access_base_mapdata: raise PermissionDenied level = get_object_or_404(Level.objects.filter(Level.q_for_request(request)), pk=level) levels, levels_on_top, levels_under = self._get_levels_pk(request, level) # don't prefetch groups for now as changesets do not yet work with m2m-prefetches levels = Level.objects.filter(pk__in=levels).filter(Level.q_for_request(request)) # graphnodes_qs = request.changeset.wrap_model('GraphNode').objects.all() levels = levels.prefetch_related( Prefetch('spaces', request.changeset.wrap_model('Space').objects.filter(Space.q_for_request(request))), Prefetch('doors', request.changeset.wrap_model('Door').objects.filter(Door.q_for_request(request))), 'buildings', 'spaces__holes', 'spaces__groups', 'spaces__columns', 'spaces__altitudemarkers', # Prefetch('spaces__graphnodes', graphnodes_qs) ) levels = {s.pk: s for s in levels} level = levels[level.pk] levels_under = [levels[pk] for pk in levels_under] levels_on_top = [levels[pk] for pk in levels_on_top] # todo: permissions # graphnodes = tuple(chain(*(space.graphnodes.all() # for space in chain(*(level.spaces.all() for level in levels.values()))))) # graphnodes_lookup = {node.pk: node for node in graphnodes} # graphedges = request.changeset.wrap_model('GraphEdge').objects.all() # graphedges = graphedges.filter(Q(from_node__in=graphnodes) | Q(to_node__in=graphnodes)) # graphedges = graphedges.select_related('waytype') # this is faster because we only deserialize graphnode geometries once # missing_graphnodes = graphnodes_qs.filter(pk__in=set(chain(*((edge.from_node_id, edge.to_node_id) # for edge in graphedges)))) # graphnodes_lookup.update({node.pk: node for node in missing_graphnodes}) # for edge in graphedges: # edge._from_node_cache = graphnodes_lookup[edge.from_node_id] # edge._to_node_cache = graphnodes_lookup[edge.to_node_id] # graphedges = [edge for edge in graphedges if edge.from_node.space_id != edge.to_node.space_id] results = chain( *(self._get_level_geometries(l) for l in levels_under), self._get_level_geometries(level), *(self._get_level_geometries(l) for l in levels_on_top), *(space.altitudemarkers.all() for space in level.spaces.all()), # graphedges, # graphnodes, ) return Response([obj.to_geojson(instance=obj) for obj in results]) elif space is not None: space_q_for_request = Space.q_for_request(request) qs = Space.objects.filter(space_q_for_request) space = get_object_or_404(qs.select_related('level', 'level__on_top_of'), pk=space) level = space.level if not request.user_permissions.can_access_base_mapdata and not space.base_mapdata_accessible: raise PermissionDenied if request.user_permissions.can_access_base_mapdata: doors = [door for door in level.doors.filter(Door.q_for_request(request)).all() if door.geometry.intersects(space.geometry)] doors_space_geom = cascaded_union([door.geometry for door in doors]+[space.geometry]) levels, levels_on_top, levels_under = self._get_levels_pk(request, level.primary_level) if level.on_top_of_id is not None: levels = chain([level.pk], levels_on_top) other_spaces = Space.objects.filter(space_q_for_request, level__pk__in=levels).prefetch_related('groups') space = next(s for s in other_spaces if s.pk == space.pk) other_spaces = [s for s in other_spaces if s.geometry.intersects(doors_space_geom) and s.pk != space.pk] all_other_spaces = other_spaces if level.on_top_of_id is None: other_spaces_lower = [s for s in other_spaces if s.level_id in levels_under] other_spaces_upper = [s for s in other_spaces if s.level_id in levels_on_top] else: other_spaces_lower = [s for s in other_spaces if s.level_id == level.on_top_of_id] other_spaces_upper = [] other_spaces = [s for s in other_spaces if s.level_id == level.pk] space.bounds = True buildings = level.buildings.all() buildings_geom = cascaded_union([building.geometry for building in buildings]) for other_space in other_spaces: if other_space.outside: other_space.geometry = other_space.geometry.difference(buildings_geom) for other_space in chain(other_spaces, other_spaces_lower, other_spaces_upper): other_space.opacity = 0.4 other_space.color = '#ffffff' for building in buildings: building.opacity = 0.5 else: buildings = [] doors = [] other_spaces = [] other_spaces_lower = [] other_spaces_upper = [] all_other_spaces = [] # todo: permissions graphnodes = request.changeset.wrap_model('GraphNode').objects.all() graphnodes = graphnodes.filter((Q(space__in=all_other_spaces)) | Q(space__pk=space.pk)) space_graphnodes = tuple(node for node in graphnodes if node.space_id == space.pk) graphedges = request.changeset.wrap_model('GraphEdge').objects.all() graphedges = graphedges.filter(Q(from_node__in=space_graphnodes) | Q(to_node__in=space_graphnodes)) graphedges = graphedges.select_related('from_node', 'to_node', 'waytype') areas = space.areas.filter(Area.q_for_request(request)).prefetch_related('groups') for area in areas: area.opacity = 0.5 results = chain( buildings, other_spaces_lower, doors, other_spaces, [space], areas, space.holes.all(), space.stairs.all(), space.ramps.all(), space.obstacles.all(), space.lineobstacles.all(), space.columns.all(), space.altitudemarkers.all(), space.wifi_measurements.all(), space.pois.filter(POI.q_for_request(request)).prefetch_related('groups'), other_spaces_upper, graphedges, graphnodes ) return Response([obj.to_geojson(instance=obj) for obj in results]) else: raise ValidationError('No level or space specified.') @action(detail=False, methods=['get']) @api_etag(etag_func=MapUpdate.current_cache_key, cache_parameters={}) def geometrystyles(self, request, *args, **kwargs): if not can_access_editor(request): raise PermissionDenied return Response({ 'building': '#aaaaaa', 'space': '#eeeeee', 'hole': 'rgba(255, 0, 0, 0.3)', 'door': '#ffffff', 'area': '#55aaff', 'stair': '#a000a0', 'ramp': 'rgba(160, 0, 160, 0.2)', 'obstacle': '#999999', 'lineobstacle': '#999999', 'column': '#888888', 'poi': '#4488cc', 'shadow': '#000000', 'graphnode': '#009900', 'graphedge': '#00CC00', 'altitudemarker': '#0000FF', 'wifimeasurement': '#DDDD00', }) @action(detail=False, methods=['get']) @api_etag(etag_func=etag_func, cache_parameters={}) def bounds(self, request, *args, **kwargs): if not can_access_editor(request): return PermissionDenied return Response({ 'bounds': Source.max_bounds(), }) def __getattr__(self, name): # allow POST and DELETE methods for the editor API if getattr(self, 'get', None).__name__ in ('list', 'retrieve'): if name == 'post' and (self.resolved.url_name.endswith('.create') or self.resolved.url_name.endswith('.edit')): return self.post_or_delete if name == 'delete' and self.resolved.url_name.endswith('.edit'): return self.post_or_delete raise AttributeError def post_or_delete(self, request, *args, **kwargs): # django-rest-framework doesn't automatically do this for logged out requests SessionAuthentication().enforce_csrf(request) return self.retrieve(request, *args, **kwargs) def list(self, request, *args, **kwargs): return self.retrieve(request, *args, **kwargs) @cached_property def resolved(self): resolved = None path = self.kwargs.get('path', '') if path: try: resolved = resolve('/editor/'+path+'/') except Resolver404: pass if not resolved: try: resolved = resolve('/editor/'+path) except Resolver404: pass self.request.sub_resolver_match = resolved return resolved def retrieve(self, request, *args, **kwargs): if not can_access_editor(request): return PermissionDenied resolved = self.resolved if not resolved: raise NotFound(_('No matching editor view endpoint found.')) if not getattr(resolved.func, 'api_hybrid', False): raise NotFound(_('Matching editor view point does not provide an API.')) response = resolved.func(request, api=True, *resolved.args, **resolved.kwargs) return response class ChangeSetViewSet(ReadOnlyModelViewSet): """ List change sets /current/ returns the current changeset. """ queryset = ChangeSet.objects.all() def get_queryset(self): return ChangeSet.qs_for_request(self.request).select_related('last_update', 'last_state_update', 'last_change') def list(self, request, *args, **kwargs): if not can_access_editor(request): return PermissionDenied return Response([obj.serialize() for obj in self.get_queryset().order_by('id')]) def retrieve(self, request, *args, **kwargs): if not can_access_editor(request): return PermissionDenied return Response(self.get_object().serialize()) @action(detail=False, methods=['get']) def current(self, request, *args, **kwargs): if not can_access_editor(request): return PermissionDenied changeset = ChangeSet.get_for_request(request) return Response(changeset.serialize()) @action(detail=True, methods=['get']) def changes(self, request, *args, **kwargs): if not can_access_editor(request): return PermissionDenied changeset = self.get_object() changeset.fill_changes_cache() return Response([obj.serialize() for obj in changeset.iter_changed_objects()])