def validate(self, attrs):
"""
Validate url if we are adding a media uri instead of a media file
"""
value = attrs.get('data_value')
data_type = attrs.get('data_type')
data_file = attrs.get('data_file')
if not ('project' in attrs or 'xform' in attrs or 'instance' in attrs):
raise serializers.ValidationError({
'missing_field':
_(u"`xform` or `project` or `instance`"
"field is required.")
})
if data_type == 'media' and data_file is None:
try:
URLValidator()(value)
except ValidationError:
parts = value.split()
if len(parts) < 3:
raise serializers.ValidationError({
'data_value':
_(u"Expecting 'xform [xform id] [media name]' "
"or 'dataview [dataview id] [media name]' "
"or a valid URL.")
})
obj = get_linked_object(parts)
if obj:
xform = obj.xform if isinstance(obj, DataView) else obj
request = self.context['request']
user_has_role = ManagerRole.user_has_role
has_perm = user_has_role(request.user, xform) or \
user_has_role(request.user, obj.project)
if not has_perm:
raise serializers.ValidationError({
'data_value':
_(u"User has no permission to "
"the dataview.")
})
else:
raise serializers.ValidationError(
{'data_value': _(u"Invalid url '%s'." % value)})
else:
# check if we have a value for the filename.
if not os.path.basename(urlparse(value).path):
raise serializers.ValidationError({
'data_value':
_(u"Cannot get filename from URL %s. URL should "
u"include the filename e.g "
u"http://example.com/data.csv" % value)
})
if data_type == XFORM_META_PERMS:
perms = value.split('|')
if len(perms) != 2 or not set(perms).issubset(set(ROLES.keys())):
raise serializers.ValidationError(
_(u"Format 'role'|'role' or Invalid role"))
return attrs
