register updated geometries for tile cache invalidation

src/c3nav/mapdata/models/geometry/base.py

@@ -28,6 +28,10 @@ class GeometryMixin(SerializableMixin):
         abstract = True
         base_manager_name = 'objects'
 
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.orig_geometry = None if 'geometry' in self.get_deferred_fields() else self.geometry
+
     def get_geojson_properties(self, *args, **kwargs) -> dict:
         result = OrderedDict((
             ('type', self.__class__.__name__.lower()),
@@ -76,6 +80,14 @@ class GeometryMixin(SerializableMixin):
     def recalculate_bounds(self):
         self.minx, self.miny, self.maxx, self.maxy = self.geometry.bounds
 
+    @property
+    def geometry_changed(self):
+        return self.orig_geometry is None or (self.geometry is not self.orig_geometry and
+                                              not self.geometry.almost_equals(self.orig_geometry, 2))
+
+    def get_changed_geometry(self):
+        return self.geometry if self.orig_geometry is None else self.geometry.symmetric_difference(self.orig_geometry)
+
     def save(self, *args, **kwargs):
         self.recalculate_bounds()
         super().save(*args, **kwargs)

src/c3nav/mapdata/models/geometry/level.py

@@ -15,6 +15,7 @@ from c3nav.mapdata.models import Level
 from c3nav.mapdata.models.access import AccessRestrictionMixin
 from c3nav.mapdata.models.geometry.base import GeometryMixin
 from c3nav.mapdata.models.locations import SpecificLocation
+from c3nav.mapdata.render.cache import changed_geometries
 from c3nav.mapdata.utils.geometry import assert_multilinestring, assert_multipolygon, clean_geometry
 
 
@@ -41,6 +42,17 @@ class LevelGeometryMixin(GeometryMixin):
             result['level'] = self.level_id
         return result
 
+    def register_change(self, force=False):
+        if force or self.geometry_changed:
+            changed_geometries.register(self.level_id, self.geometry if force else self.get_changed_geometry())
+
+    def register_delete(self):
+        changed_geometries.register(self.level_id, self.geometry)
+
+    def save(self, *args, **kwargs):
+        self.register_change()
+        super().save(*args, **kwargs)
+
 
 class Building(LevelGeometryMixin, models.Model):
     """

src/c3nav/mapdata/models/geometry/space.py

@@ -5,6 +5,7 @@ from shapely.geometry import CAP_STYLE, JOIN_STYLE, mapping
 from c3nav.mapdata.fields import GeometryField
 from c3nav.mapdata.models.geometry.base import GeometryMixin
 from c3nav.mapdata.models.locations import SpecificLocation
+from c3nav.mapdata.render.cache import changed_geometries
 from c3nav.mapdata.utils.json import format_geojson
 
 
@@ -28,6 +29,21 @@ class SpaceGeometryMixin(GeometryMixin):
                 result['color'] = color
         return result
 
+    def register_change(self, force=True):
+        space = self.space
+        if force or self.geometry_changed:
+            changed_geometries.register(space.level_id, space.geometry.intersection(
+                self.geometry if force else self.get_changed_geometry()
+            ))
+
+    def register_delete(self):
+        space = self.space
+        changed_geometries.register(space.level_id, space.geometry.intersection(self.geometry))
+
+    def save(self, *args, **kwargs):
+        self.register_change()
+        super().save(*args, **kwargs)
+
 
 class Column(SpaceGeometryMixin, models.Model):
     """