add REST API

src/c3nav/api/views/map.py

@@ -0,0 +1,65 @@
+import mimetypes
+import os
+
+from django.conf import settings
+from django.core.files import File
+from django.http import HttpResponse
+
+from rest_framework.viewsets import ReadOnlyModelViewSet
+from rest_framework.decorators import detail_route
+
+from ...mapdata.models import Level, Package, Source
+from ..serializers import LevelSerializer, PackageSerializer, SourceSerializer
+from ..permissions import filter_source_queryset
+
+
+class LevelViewSet(ReadOnlyModelViewSet):
+    """
+    Returns a list of all levels on the map.
+    """
+    queryset = Level.objects.all()
+    serializer_class = LevelSerializer
+    lookup_value_regex = '[^/]+'
+    filter_fields = ('altitude', 'package')
+    ordering_fields = ('altitude', 'package')
+    ordering = ('altitude',)
+    search_fields = ('name',)
+
+
+class PackageViewSet(ReadOnlyModelViewSet):
+    """
+    Returns a list of all packages the map consists of.
+    """
+    queryset = Package.objects.all()
+    serializer_class = PackageSerializer
+    lookup_value_regex = '[^/]+'
+    filter_fields = ('name', 'depends')
+    ordering_fields = ('name',)
+    ordering = ('name',)
+    search_fields = ('name',)
+
+
+class SourceViewSet(ReadOnlyModelViewSet):
+    """
+    Returns a list of source images (to use as a drafts).
+    Call /sources/{name}/image to get the image.
+    """
+    queryset = Source.objects.all()
+    serializer_class = SourceSerializer
+    lookup_value_regex = '[^/]+'
+    filter_fields = ('package',)
+    ordering_fields = ('name', 'package')
+    ordering = ('name',)
+    search_fields = ('name',)
+
+    def get_queryset(self):
+        return filter_source_queryset(self.request, super().get_queryset())
+
+    @detail_route(methods=['get'])
+    def image(self, request, pk=None, version=None):
+        source = self.get_object()
+        response = HttpResponse(content_type=mimetypes.guess_type(source.name)[0])
+        image_path = os.path.join(settings.MAP_ROOT, source.package.directory, 'sources', source.name)
+        for chunk in File(open(image_path, 'rb')).chunks():
+            response.write(chunk)
+        return response