"""REST API view model serializers for the projectroles app"""
from email.utils import parseaddr
from django.conf import settings
from django.contrib.auth import get_user_model
from rest_framework import exceptions, serializers
from drf_keyed_list import KeyedListSerializer
from projectroles.models import (
Project,
Role,
RoleAssignment,
ProjectInvite,
AppSetting,
SODARUserAdditionalEmail,
SODAR_CONSTANTS,
ROLE_RANKING,
CAT_DELIMITER,
CAT_DELIMITER_ERROR_MSG,
ROLE_PROJECT_TYPE_ERROR_MSG,
)
from projectroles.utils import build_secret
from projectroles.views import (
ProjectModifyMixin,
RoleAssignmentModifyMixin,
ProjectInviteMixin,
)
User = get_user_model()
# SODAR constants
PROJECT_TYPE_PROJECT = SODAR_CONSTANTS['PROJECT_TYPE_PROJECT']
PROJECT_TYPE_CATEGORY = SODAR_CONSTANTS['PROJECT_TYPE_CATEGORY']
PROJECT_ROLE_OWNER = SODAR_CONSTANTS['PROJECT_ROLE_OWNER']
PROJECT_ROLE_DELEGATE = SODAR_CONSTANTS['PROJECT_ROLE_DELEGATE']
PROJECT_ROLE_CONTRIBUTOR = SODAR_CONSTANTS['PROJECT_ROLE_CONTRIBUTOR']
PROJECT_ROLE_GUEST = SODAR_CONSTANTS['PROJECT_ROLE_GUEST']
PROJECT_ROLE_FINDER = SODAR_CONSTANTS['PROJECT_ROLE_FINDER']
SYSTEM_USER_GROUP = SODAR_CONSTANTS['SYSTEM_USER_GROUP']
# Local constants
REMOTE_MODIFY_MSG = (
'Modification of remote projects is not allowed, modify on the SOURCE site '
'instead'
)
# Base Serializers -------------------------------------------------------------
[docs]
class SODARModelSerializer(serializers.ModelSerializer):
"""Base serializer for any SODAR model with a sodar_uuid field"""
sodar_uuid = serializers.CharField(read_only=True)
class Meta:
pass
[docs]
def to_representation(self, instance):
"""
Override to_representation() to ensure sodar_uuid is included for object
creation POST responses.
"""
ret = super().to_representation(instance)
if 'sodar_uuid' not in ret and 'sodar_uuid' in self.context:
ret['sodar_uuid'] = str(self.context['sodar_uuid'])
return ret
[docs]
def save(self, **kwargs):
"""
Override save() to ensure sodar_uuid is included for object creation
POST responses.
"""
obj = super().save(**kwargs)
return self.post_save(obj)
[docs]
def post_save(self, obj):
"""
Function to call at the end of a custom save() method. Ensures the
returning of sodar_uuid in object creation POST responses.
:param obj: Object created in save()
:return: obj
"""
if hasattr(obj, 'sodar_uuid'):
self.context['sodar_uuid'] = obj.sodar_uuid
return obj
[docs]
class SODARProjectModelSerializer(SODARModelSerializer):
"""
Base serializer for SODAR models with a project relation.
The project field is read only because it is retrieved through the object
reference in the URL.
"""
project = serializers.SlugRelatedField(
slug_field='sodar_uuid', read_only=True
)
class Meta:
pass
[docs]
def to_representation(self, instance):
"""
Override to_representation() to ensure the project value is included
in responses.
"""
ret = super().to_representation(instance)
if 'project' not in ret and 'project' in self.context:
ret['project'] = str(self.context['project'].sodar_uuid)
return ret
[docs]
def create(self, validated_data):
"""Override create() to add project into validated data"""
if 'project' not in validated_data and 'project' in self.context:
validated_data['project'] = self.context['project']
return super().create(validated_data)
[docs]
class SODARNestedListSerializer(SODARModelSerializer):
"""
Serializer to display nested SODAR models as dicts with sodar_uuid as key.
"""
class Meta:
list_serializer_class = KeyedListSerializer
keyed_list_serializer_field = 'sodar_uuid'
duplicate_list_key = True # Extension to drf-keyed-list
[docs]
def to_representation(self, instance):
"""
Override to_representation() to pop project from a nested list
representation, where the project context is already known in the
topmost model.
"""
ret = super().to_representation(instance)
if self.context.get('project'):
ret.pop('project', None)
return ret
[docs]
class SODARUserSerializer(SODARModelSerializer):
"""Serializer for the user model used in SODAR Core based sites"""
additional_emails = serializers.SerializerMethodField()
class Meta:
model = User
fields = [
'username',
'name',
'email',
'additional_emails',
'is_superuser',
'sodar_uuid',
]
def get_additional_emails(self, obj):
return [
e.email
for e in SODARUserAdditionalEmail.objects.filter(
user=obj, verified=True
).order_by('email')
]
# Projectroles Serializers -----------------------------------------------------
class RoleAssignmentValidateMixin:
"""Mixin for common role assignment validation"""
def validate(self, attrs):
project = self.context['project']
current_user = self.context['request'].user
del_limit = getattr(settings, 'PROJECTROLES_DELEGATE_LIMIT', 1)
# Validation for remote sites and projects
if project.is_remote():
raise serializers.ValidationError(REMOTE_MODIFY_MSG)
if 'role' not in attrs:
return attrs
# Do not allow modifying/inviting owner
if attrs['role'].name == PROJECT_ROLE_OWNER:
raise serializers.ValidationError('Modifying owner not allowed')
# Check delegate perms
if attrs[
'role'
].name == PROJECT_ROLE_DELEGATE and not current_user.has_perm(
'projectroles.update_project_delegate', project
):
raise exceptions.PermissionDenied(
'User lacks permission to assign delegates'
)
# Check delegate limit
if (
attrs['role'].name == PROJECT_ROLE_DELEGATE
and del_limit != 0
and len(project.get_delegates(inherited=False)) >= del_limit
):
raise serializers.ValidationError(
'Project delegate limit of {} has been reached'.format(
del_limit
)
)
return attrs
class RoleAssignmentSerializer(
RoleAssignmentModifyMixin,
RoleAssignmentValidateMixin,
SODARProjectModelSerializer,
):
"""Serializer for the RoleAssignment model"""
role = serializers.SlugRelatedField(
slug_field='name', queryset=Role.objects.all()
)
user = serializers.SlugRelatedField(
slug_field='sodar_uuid', queryset=User.objects.all()
)
class Meta:
model = RoleAssignment
fields = ['project', 'role', 'user', 'sodar_uuid']
def validate(self, attrs):
attrs = super().validate(attrs)
project = self.context['project']
# Add user to instance for PATCH requests
if self.instance and not attrs.get('user'):
attrs['user'] = self.instance.user
# Do not allow updating user
if (
self.instance
and 'user' in attrs
and attrs['user'] != self.instance.user
):
raise serializers.ValidationError(
'Updating the user is not allowed, create a new role '
'assignment instead'
)
# Validate project type
if project.type not in attrs['role'].project_types:
raise serializers.ValidationError(
ROLE_PROJECT_TYPE_ERROR_MSG.format(
project_type=project.type, role_name=attrs['role'].name
)
)
# Check for existing role if creating
if not self.instance:
old_as = RoleAssignment.objects.filter(
project=project, user=attrs['user']
).first()
if old_as:
raise serializers.ValidationError(
'User already has the role of "{}" in project '
'(UUID={})'.format(old_as.role.name, old_as.sodar_uuid)
)
# Prevent demoting if inherited role exists
for old_role_as in RoleAssignment.objects.filter(
project__in=project.get_parents(), user=attrs['user']
):
if attrs['role'].rank > old_role_as.role.rank:
raise serializers.ValidationError(
'User inherits role "{}", demoting from inherited role is '
'not allowed'.format(old_role_as.role.name)
)
return attrs
def save(self, **kwargs):
"""Override save() to handle saving with project modify API"""
# NOTE: Role not updated in response data unless we set self.instance
# TODO: Figure out a clean fix
self.instance = self.post_save(
self.modify_assignment(
data=self.validated_data,
request=self.context['request'],
project=self.context['project'],
instance=self.instance,
)
)
return self.instance
class RoleAssignmentNestedListSerializer(
SODARNestedListSerializer, RoleAssignmentSerializer
):
"""Nested list serializer for the RoleAssignment model."""
user = SODARUserSerializer(read_only=True)
class Meta(SODARNestedListSerializer.Meta):
model = RoleAssignment
fields = ['role', 'user', 'sodar_uuid']
read_only_fields = ['role']
class ProjectInviteSerializer(
ProjectInviteMixin, RoleAssignmentValidateMixin, SODARProjectModelSerializer
):
"""Serializer for the ProjectInvite model"""
issuer = SODARUserSerializer(read_only=True)
role = serializers.SlugRelatedField(
slug_field='name', queryset=Role.objects.all()
)
class Meta:
model = ProjectInvite
fields = [
'email',
'project',
'role',
'issuer',
'date_created',
'date_expire',
'message',
'sodar_uuid',
]
read_only_fields = ['issuer', 'date_created', 'date_expire', 'active']
def validate(self, attrs):
attrs = super().validate(attrs)
# Validate email
if not parseaddr(attrs['email'])[1]:
raise serializers.ValidationError(
'Invalid email address "{}"'.format(attrs['email'])
)
# Check for existing user
user = User.objects.filter(email=attrs['email']).first()
if user:
raise serializers.ValidationError(
'User already exist in system with given email '
'"{}": {} ({})'.format(
attrs['email'], user.username, user.sodar_uuid
)
)
return attrs
def create(self, validated_data):
validated_data['issuer'] = self.context['request'].user
# validated_data['date_expire'] = get_expiry_date()
validated_data['secret'] = build_secret()
return super().create(validated_data)
def save(self, **kwargs):
obj = super().save(**kwargs)
self.handle_invite(obj, self.context['request'], add_message=False)
return self.post_save(obj)
class ProjectSerializer(ProjectModifyMixin, SODARModelSerializer):
"""Serializer for the Project model"""
owner = serializers.CharField(write_only=True, required=False)
parent = serializers.SlugRelatedField(
slug_field='sodar_uuid',
many=False,
allow_null=True,
queryset=Project.objects.filter(type=PROJECT_TYPE_CATEGORY),
)
readme = serializers.CharField(required=False, allow_blank=True)
archive = serializers.BooleanField(read_only=True)
roles = RoleAssignmentNestedListSerializer(
read_only=True, many=True, source='get_roles'
)
class Meta:
model = Project
fields = [
'title',
'type',
'parent',
'description',
'readme',
'public_guest_access',
'archive',
'full_title',
'owner',
'roles',
'sodar_uuid',
]
read_only_fields = ['full_title']
def _validate_parent(self, parent, attrs, current_user, disable_categories):
"""Validate parent field"""
# Attempting to move project under category without perms
if (
parent
and not current_user.is_superuser
and not current_user.has_perm('projectroles.create_project', parent)
and (not self.instance or self.instance.parent != parent)
):
raise exceptions.PermissionDenied(
'User lacks permission to place project under given category'
)
if parent and parent.type != PROJECT_TYPE_CATEGORY:
raise serializers.ValidationError('Parent is not a category')
elif (
'parent' in attrs
and not parent
and self.instance
and self.instance.parent
and not current_user.is_superuser
):
raise exceptions.PermissionDenied(
'Only superusers are allowed to place categories in root'
)
# Attempting to create/move project in root
if (
'parent' in attrs
and not parent
and attrs.get('type') == PROJECT_TYPE_PROJECT
and not disable_categories
):
raise serializers.ValidationError(
'Project must be placed under a category'
)
# Ensure we are not moving a category under one of its children
if (
parent
and self.instance
and self.instance.type == PROJECT_TYPE_CATEGORY
and parent in self.instance.get_children(flat=True)
):
raise serializers.ValidationError(
'Moving a category under its own child is not allowed'
)
def _validate_title(self, parent, attrs):
"""Validate title field"""
title = attrs.get('title')
if title and (
CAT_DELIMITER in title
or title.startswith(CAT_DELIMITER.strip())
or title.endswith(CAT_DELIMITER.strip())
):
raise serializers.ValidationError(CAT_DELIMITER_ERROR_MSG)
if parent and title == parent.title:
raise serializers.ValidationError('Title can\'t match with parent')
if (
title
and not self.instance
and Project.objects.filter(title=attrs['title'], parent=parent)
):
raise serializers.ValidationError(
'Title must be unique within parent'
)
def _validate_type(self, attrs):
"""Validate type field"""
project_type = attrs.get('type')
if project_type not in [
PROJECT_TYPE_CATEGORY,
PROJECT_TYPE_PROJECT,
None,
]: # None is ok for PATCH (will be updated in modify_project())
raise serializers.ValidationError(
'Type is not {} or {}'.format(
PROJECT_TYPE_CATEGORY, PROJECT_TYPE_PROJECT
)
)
if (
project_type
and self.instance
and attrs['type'] != self.instance.type
):
raise serializers.ValidationError(
'Changing the project type is not allowed'
)
def _validate_owner(self, attrs):
"""Validate owner field"""
if attrs.get('owner'):
if (
self.partial
and attrs['owner'] != self.instance.get_owner().user.sodar_uuid
):
raise serializers.ValidationError(
'Modifying owner not allowed here, '
'use ownership transfer API view instead'
)
owner = User.objects.filter(sodar_uuid=attrs['owner']).first()
if not owner:
raise serializers.ValidationError('Owner not found')
attrs['owner'] = owner
elif not self.instance:
raise serializers.ValidationError(
'The "owner" parameter must be supplied for project creation'
)
def validate(self, attrs):
site_mode = getattr(
settings,
'PROJECTROLES_SITE_MODE',
SODAR_CONSTANTS['SITE_MODE_SOURCE'],
)
target_create = getattr(settings, 'PROJECTROLES_TARGET_CREATE', True)
disable_categories = getattr(
settings, 'PROJECTROLES_DISABLE_CATEGORIES', False
)
current_user = self.context['request'].user
# Validation for remote sites and projects
if self.instance and self.instance.is_remote():
raise serializers.ValidationError(REMOTE_MODIFY_MSG)
elif (
not self.instance
and site_mode == SODAR_CONSTANTS['SITE_MODE_TARGET']
and not target_create
):
raise serializers.ValidationError(
'Creation of local projects not allowed on this target site'
)
# Validate parent
parent = attrs.get('parent')
self._validate_parent(parent, attrs, current_user, disable_categories)
# Validate title
self._validate_title(parent, attrs)
# Validate type
self._validate_type(attrs)
# Validate and set owner
self._validate_owner(attrs)
# Validate public_guest_access for categories
if attrs.get('type') == PROJECT_TYPE_CATEGORY and attrs.get(
'public_guest_access'
):
raise serializers.ValidationError(
'Public guest access is not allowed for categories'
)
# Set readme
if 'readme' in attrs and 'raw' in attrs['readme']:
attrs['readme'] = attrs['readme']['raw']
return attrs
def save(self, **kwargs):
"""Override save() to handle saving with project modify API"""
# NOTE: post_save() not needed here since we do an atomic model.save()
return self.modify_project(
data=self.validated_data,
request=self.context['request'],
instance=self.instance,
)
def to_representation(self, instance):
"""
Override to make sure fields are correctly returned.
NOTE: Requires request in context object!
"""
ret = super().to_representation(instance)
# Set up project to get instance with UUID
parent = ret.get('parent')
project = Project.objects.get(
title=ret['title'],
**{'parent__sodar_uuid': parent} if parent else {},
)
# Return only title, full title and UUID for projects with finder role
user = self.context['request'].user
if (
project.type == PROJECT_TYPE_PROJECT
and project.parent
and not project.has_role(user)
):
parent_as = project.parent.get_role(user)
if (
parent_as
and parent_as.role.rank >= ROLE_RANKING[PROJECT_ROLE_FINDER]
):
return {
'title': project.title,
'full_title': project.full_title,
'sodar_uuid': str(project.sodar_uuid),
}
# Else return full serialization
# Proper rendering of readme
ret['readme'] = project.readme.raw or ''
# Force project UUID
if not ret.get('sodar_uuid'):
ret['sodar_uuid'] = str(project.sodar_uuid)
# Add "inherited" info to roles
if ret.get('roles'):
for k, v in ret['roles'].items():
role_as = RoleAssignment.objects.get(sodar_uuid=k)
ret['roles'][k]['inherited'] = (
True if role_as.project != project else False
)
# Set full_title manually
ret['full_title'] = project.full_title
return ret
class AppSettingSerializer(SODARProjectModelSerializer):
"""
Serializer for the AppSetting model. Should only be used for read and list
views. The sodar_uuid is not provided, as interacting with database objects
directly is not the intended way to set/get app settings.
"""
plugin_name = serializers.CharField(read_only=True)
user = SODARUserSerializer(read_only=True)
class Meta:
model = AppSetting
fields = [
'plugin_name',
'project',
'user',
'name',
'type',
'value',
'user_modifiable',
]
read_only_fields = [*fields]
def to_representation(self, instance):
"""Override to clean up data for serialization"""
ret = super().to_representation(instance)
if instance.app_plugin:
ret['plugin_name'] = instance.app_plugin.name
else:
ret['plugin_name'] = 'projectroles'
ret['value'] = instance.get_value()
return ret