add routing api

src/c3nav/api/urls.py

@@ -12,6 +12,7 @@ from c3nav.mapdata.api import (AccessRestrictionViewSet, AreaViewSet, BuildingVi
                                HoleViewSet, LevelViewSet, LineObstacleViewSet, LocationBySlugViewSet,
                                LocationGroupCategoryViewSet, LocationGroupViewSet, LocationViewSet, MapViewSet,
                                ObstacleViewSet, POIViewSet, RampViewSet, SourceViewSet, SpaceViewSet, StairViewSet)
+from c3nav.routing.api import RoutingViewSet
 
 router = SimpleRouter()
 router.register(r'map', MapViewSet, base_name='map')
@@ -35,6 +36,8 @@ router.register(r'locations/by_slug', LocationBySlugViewSet, base_name='location
 router.register(r'locationgroupcategories', LocationGroupCategoryViewSet)
 router.register(r'locationgroups', LocationGroupViewSet)
 
+router.register(r'routing', RoutingViewSet, base_name='routing')
+
 router.register(r'editor', EditorViewSet, base_name='editor')
 router.register(r'changesets', ChangeSetViewSet)
 

src/c3nav/routing/api.py

@@ -0,0 +1,32 @@
+from rest_framework.decorators import list_route
+from rest_framework.response import Response
+from rest_framework.viewsets import ViewSet
+
+from c3nav.routing.forms import RouteForm
+from c3nav.routing.router import Router
+
+
+class RoutingViewSet(ViewSet):
+    """
+    Routing API
+    /geometries/ returns a list of geojson features, you have to specify ?level=<id> or ?space=<id>
+    /geometrystyles/ returns styling information for all geometry types
+    /bounds/ returns the maximum bounds of the map
+    """
+
+    def list(self, request):
+        return []
+
+    @list_route(methods=['get'])
+    def route(self, request, *args, **kwargs):
+        params = request.POST if request.method == 'POST' else request.GET
+        form = RouteForm(params, request=request)
+
+        if not form.is_valid():
+            return Response({
+                'errors': form.errors,
+            })
+
+        route = Router.load().get_route(form.cleaned_data['origin'], form.cleaned_data['destination'])
+
+        return Response(route.serialize())

src/c3nav/routing/forms.py

@@ -0,0 +1,25 @@
+from django import forms
+from django.utils.translation import ugettext_lazy
+
+from c3nav.mapdata.utils.locations import locations_for_request
+
+
+class RouteForm(forms.Form):
+    origin = forms.IntegerField(min_value=1)
+    destination = forms.IntegerField(min_value=1)
+
+    def __init__(self, *args, request=None, **kwargs):
+        self.request = request
+        super().__init__(*args, **kwargs)
+
+    def clean_origin(self):
+        try:
+            return locations_for_request(self.request)[self.cleaned_data['origin']]
+        except KeyError:
+            raise forms.ValidationError(ugettext_lazy('Unknown origin.'))
+
+    def clean_destination(self):
+        try:
+            return locations_for_request(self.request)[self.cleaned_data['destination']]
+        except KeyError:
+            raise forms.ValidationError(ugettext_lazy('Unknown destination.'))