def allocate_workslice_features(self, workslice, extent, feature_filter):
layer_in_dataset = workslice.layer_in_dataset
covered_fids = osm.get_layer_feature_ids(layer_in_dataset, extent)
if covered_fids is None:
raise WorksliceTooFeaturefulError
if len(covered_fids) == 0:
raise WorksliceInsufficientlyFeaturefulError
ws_feats = [
WorksliceFeature(
workslice=workslice,
layer_in_dataset=layer_in_dataset,
feature_id=fid
) for fid
in covered_fids
if not self.filter(
layer_in_dataset=layer_in_dataset,
feature_id=fid,
dirty=0
).exists()
]
if len(ws_feats) > layer_in_dataset.layer.feature_limit:
raise WorksliceTooFeaturefulError
if len(ws_feats) == 0:
raise WorksliceInsufficientlyFeaturefulError
ws_feats = feature_filter.apply(ws_feats)
self.bulk_create(ws_feats)
workslice.feature_count = len(ws_feats)
workslice.save()
def workslice_info(request, layer_in_dataset_id):
layer_in_dataset = get_object_or_404(LayerInDataset, pk=layer_in_dataset_id)
layer = layer_in_dataset.layer
dataset = layer_in_dataset.dataset
ctx = {}
form = WorksliceForm(request.POST, error_class=BootstrapErrorList, hide_filters=layer_in_dataset.hide_filters)
if form.is_valid():
feature_count = osm.get_layer_feature_count(dataset.name, layer, form.extent)
if feature_count > layer.feature_limit:
ctx['info'] = "Too many features (over %d): please reduce selection." % layer.feature_limit
ctx['osm_conflict_info'] = ""
else:
if feature_count > 1:
ctx['info'] = "%d features in selection." % feature_count
elif feature_count == 1:
ctx['info'] = "1 feature in selection."
elif feature_count == 0:
ctx['info'] = "No features in selection."
else:
ctx['info'] = "Serious error calculating features."
if form.cleaned_data['show_conflicting_features'] in ['yes', 'count'] or form.cleaned_data['show_features_in_selection'] in ['yes', 'centroids']:
feature_ids = osm.get_layer_feature_ids(layer_in_dataset, form.extent)
workslice_features = [WorksliceFeature(feature_id=feat_id, layer_in_dataset=layer_in_dataset) for feat_id in feature_ids]
if form.cleaned_data['show_conflicting_features'] in ['yes', 'count']:
if layer.tags_ql:
osm_conflicts = overpass.osm_conflicts_json(workslice_features, layer.tags_ql)['elements'] # FIXME: tagging
nodes = dict([(n['id'], n) for n in osm_conflicts if n['type'] == 'node'])
ways = dict([(n['id'], n) for n in osm_conflicts if n['type'] == 'way'])
rels = dict([(n['id'], n) for n in osm_conflicts if n['type'] == 'rel'])
if layer.geometry_type == 'POINT':
conflict_count = len(nodes)
if form.cleaned_data['show_conflicting_features'] == 'yes':
ctx['osm_conflict_geometry'] = overpass.osm_geojson(nodes.values())
elif layer.geometry_type == 'LINESTRING':
conflict_count = len(ways)
if form.cleaned_data['show_conflicting_features'] == 'yes':
ctx['osm_conflict_geometry'] = overpass.osm_geojson(ways.values(), nodes)
elif layer.geometry_type == 'POLYGON':
conflict_count = len(ways) # FIXME: count rels too.
if form.cleaned_data['show_conflicting_features'] == 'yes':
ctx['osm_conflict_geometry'] = overpass.osm_geojson(rels.values(), nodes, ways)
elif layer.geometry_type == 'RELATION':
conflict_count = len(rels)
if form.cleaned_data['show_conflicting_features'] == 'yes':
ctx['osm_conflict_geometry'] = overpass.osm_geojson(rels.values(), nodes, ways)
if conflict_count > 1:
ctx['osm_conflict_info'] = "%d nearby features of this type in OSM." % conflict_count
elif conflict_count == 1:
ctx['osm_conflict_info'] = "1 nearby feature of this type in OSM."
elif conflict_count == 0:
ctx['osm_conflict_info'] = "No nearby features of this type in OSM."
else:
ctx['osm_conflict_info'] = "Error querying OSM."
else:
ctx["osm_conflict_info"] = "Could not check for conflicting features - no OSM query set for this layer."
else:
ctx['osm_conflict_info'] = ""
if form.cleaned_data['show_features_in_selection'] == 'yes':
ctx['feature_selection_geometry'] = osm.feature_selection_geojson(workslice_features)
elif form.cleaned_data['show_features_in_selection'] == 'centroids':
ctx['feature_selection_geometry'] = osm.feature_selection_geojson(workslice_features, True)
else:
ctx['info'] = " ".join(form.errors['__all__'])
# ctx['queries'] = django.db.connections[layer_in_dataset.dataset.name].queries
return HttpResponse(json.dumps(ctx), content_type='application/json')
