def get_object_for_viewing(request, uid, target_klass=None):
"""
Return the specified instance by uid for viewing.
If a target_klass is provided, uid will be checked for consistency.
If the request has no authenticated user, a 401 Response will be returned.
If the item is not found, a 404 Response will be returned. If the user is
not authorized to view the item (not the owner or part of a group the item
is shared with), a 403 Not Authorized Response will be returned.
usage:
instance = get_object_for_viewing(request, 'mlpa_mpa_12', target_klass=Mpa)
if isinstance(instance, HttpResponse):
return instance
"""
if target_klass and not target_klass.model_uid() in uid:
return HttpResponse("Target class %s doesn't match the provided uid %s" %
(target_klass, uid),
status=401)
try:
instance = get_feature_by_uid(uid)
except ValueError:
return HttpResponse("Uid not valid: %s" % uid, status=401)
except:
return HttpResponse("Feature not found - %s" % uid, status=404)
viewable, response = instance.is_viewable(request.user)
if viewable:
return instance
else:
return response
def get_object_for_editing(request, uid, target_klass=None):
"""
Return the specified instance by uid for editing.
If a target_klass is provided, uid will be checked for consistency.
If the request has no logged-in user, a 401 Response will be returned. If
the item is not found, a 404 Response will be returned. If the user is
not authorized to edit the item (not the owner or a staff user), a 403 Not
Authorized Response will be returned.
usage:
instance = get_object_for_editing(request, 'mlpa_mpa_12', target_klass=Mpa)
if isinstance(instance, HttpResponse):
return instance
"""
if target_klass and not target_klass.model_uid() in uid:
return HttpResponse("Target class %s doesn't match the provided uid %s" %
(target_klass, uid),
status=401)
try:
instance = get_feature_by_uid(uid)
except ValueError:
return HttpResponse("Uid not valid: %s" % uid, status=401)
except:
return HttpResponse("Feature not found - %s" % uid, status=404)
if not request.user.is_authenticated():
return HttpResponse('You must be logged in.', status=401)
# Check that user owns the object or is staff
if not request.user.is_staff and request.user != instance.user:
return HttpResponseForbidden(
'You do not have permission to modify this object.')
return instance
def get_data_for_feature(user, uid):
try:
f = get_feature_by_uid(uid)
except:
return False , HttpResponse("Feature %s does not exist" % uid, status=404)
viewable, response = f.is_viewable(user)
if not viewable:
return viewable, response
features = []
collections = []
if isinstance(f, FeatureCollection):
obj_id = f.pk
ct = ContentType.objects.get_for_model(f.__class__)
for fmodel in get_feature_models():
unattached = list(fmodel.objects.filter(content_type=ct,object_id=obj_id))
features.extend(unattached)
for cmodel in get_collection_models():
collections_top = list(cmodel.objects.filter(content_type=ct,object_id=obj_id))
collections.extend(collections_top)
elif isinstance(f, Feature):
features.append(f)
return features, collections
def get_features(uids, user):
"""
Returns list of tuples representing mapnik layers
Tuple => (model_class, [pks])
Note: currently just a single pk per 'layer' which is
incredibly inefficient but the only way to ensure
proper layer ordering (??).
features = [ (Mpa, [49, 50]),
(Pipeline, [32, 31]),
(Shipwreck, [32, 31])
]
"""
feature_models = get_feature_models()
collection_models = get_collection_models()
features = [] # list of tuples => (model, [pks])
for uid in uids:
log.debug("processing uid %s" % uid)
applabel, modelname, pk = uid.split('_')
model = get_model_by_uid("%s_%s" % (applabel, modelname))
feature = get_feature_by_uid(uid)
if user:
viewable, response = feature.is_viewable(user)
if not viewable:
continue
if model in collection_models:
collection = get_feature_by_uid(uid)
if user:
viewable, response = collection.is_viewable(user)
if not viewable:
continue
all_children = collection.feature_set(recurse=True)
children = [
x for x in all_children if x.__class__ in feature_models
]
for child in children:
features.append((child.__class__, [child.pk]))
else:
features.append((model, [int(pk)]))
return features
def get_features(uids,user):
"""
Returns list of tuples representing mapnik layers
Tuple => (model_class, [pks])
Note: currently just a single pk per 'layer' which is
incredibly inefficient but the only way to ensure
proper layer ordering (??).
features = [ (Mpa, [49, 50]),
(Pipeline, [32, 31]),
(Shipwreck, [32, 31])
]
"""
feature_models = get_feature_models()
collection_models = get_collection_models()
features = [] # list of tuples => (model, [pks])
for uid in uids:
log.debug("processing uid %s" % uid)
applabel, modelname, pk = uid.split('_')
model = get_model_by_uid("%s_%s" % (applabel,modelname))
feature = get_feature_by_uid(uid)
if user:
viewable, response = feature.is_viewable(user)
if not viewable:
continue
if model in collection_models:
collection = get_feature_by_uid(uid)
if user:
viewable, response = collection.is_viewable(user)
if not viewable:
continue
all_children = collection.feature_set(recurse=True)
children = [x for x in all_children if x.__class__ in feature_models]
for child in children:
features.append((child.__class__,[child.pk]))
else:
features.append((model,[int(pk)]))
return features
def overlap_geotiff(collection_uids, user=None):
collections = [get_feature_by_uid(x) for x in collection_uids.split(',')]
collections = [x for x in collections if x.__class__ in get_collection_models()]
if len(collections) < 1:
raise Http404
filenames = []
for collection in collections:
viewable, response = collection.is_viewable(user)
if user and not viewable:
return response
fs = collection.feature_set(recurse=True)
poly_fs = [x for x in fs if isinstance(x,PolygonFeature)]
unique_types = list(set([x.__class__ for x in poly_fs]))
for model in unique_types:
responder = ShpResponder(model.objects.filter(pk__in=[x.pk for x in poly_fs if x.__class__ == model]))
responder.geo_field = 'geometry_final'
fn = responder('return_file_not_response')
filenames.append(fn)
temp_geotiff = create_heatmap(filenames)
return temp_geotiff
