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Source code for galaxy.managers.sharable
"""
Superclass Manager and Serializers for Sharable objects.
A sharable Galaxy object:
has an owner/creator User
is sharable with other, specific Users
is importable (copyable) by users that have access
has a slug which can be used as a link to view the resource
can be published effectively making it available to all other Users
can be rated
"""
import logging
import re
from sqlalchemy import true
from galaxy import exceptions
from galaxy.managers import (
annotatable,
base,
ratable,
secured,
taggable,
users
)
log = logging.getLogger(__name__)
[docs]class SharableModelManager(base.ModelManager, secured.OwnableManagerMixin, secured.AccessibleManagerMixin,
taggable.TaggableManagerMixin, annotatable.AnnotatableManagerMixin, ratable.RatableManagerMixin):
# e.g. histories, pages, stored workflows, visualizations
# base.DeleteableModelMixin? (all four are deletable)
#: the model used for UserShareAssociations with this model
user_share_model = None
#: the single character abbreviation used in username_and_slug: e.g. 'h' for histories: u/user/h/slug
SINGLE_CHAR_ABBR = None
[docs] def __init__(self, app):
super(SharableModelManager, self).__init__(app)
# user manager is needed to check access/ownership/admin
self.user_manager = users.UserManager(app)
# .... has a user
[docs] def by_user(self, user, filters=None, **kwargs):
"""
Return list for all items (of model_class type) associated with the given
`user`.
"""
user_filter = self.model_class.user_id == user.id
filters = self._munge_filters(user_filter, filters)
return self.list(filters=filters, **kwargs)
# .... owned/accessible interfaces
[docs] def is_owner(self, item, user, **kwargs):
"""
Return true if this sharable belongs to `user` (or `user` is an admin).
"""
# ... effectively a good fit to have this here, but not semantically
if self.user_manager.is_admin(user, trans=kwargs.get("trans", None)):
return True
return item.user == user
[docs] def is_accessible(self, item, user, **kwargs):
"""
If the item is importable, is owned by `user`, or (the valid) `user`
is in 'users shared with' list for the item: return True.
"""
if item.importable:
return True
# note: owners always have access - checking for accessible implicitly checks for ownership
if self.is_owner(item, user, **kwargs):
return True
if self.user_manager.is_anonymous(user):
return False
if user in item.users_shared_with_dot_users:
return True
return False
# .... importable
[docs] def make_importable(self, item, flush=True):
"""
Makes item accessible--viewable and importable--and sets item's slug.
Does not flush/commit changes, however. Item must have name, user,
importable, and slug attributes.
"""
self.create_unique_slug(item, flush=False)
return self._session_setattr(item, 'importable', True, flush=flush)
[docs] def make_non_importable(self, item, flush=True):
"""
Makes item accessible--viewable and importable--and sets item's slug.
Does not flush/commit changes, however. Item must have name, user,
importable, and slug attributes.
"""
# item must be unpublished if non-importable
if item.published:
self.unpublish(item, flush=False)
return self._session_setattr(item, 'importable', False, flush=flush)
# .... published
[docs] def publish(self, item, flush=True):
"""
Set both the importable and published flags on `item` to True.
"""
# item must be importable to be published
if not item.importable:
self.make_importable(item, flush=False)
return self._session_setattr(item, 'published', True, flush=flush)
[docs] def unpublish(self, item, flush=True):
"""
Set the published flag on `item` to False.
"""
return self._session_setattr(item, 'published', False, flush=flush)
def _query_published(self, filters=None, **kwargs):
"""
Return a query for all published items.
"""
published_filter = self.model_class.published == true()
filters = self._munge_filters(published_filter, filters)
return self.query(filters=filters, **kwargs)
[docs] def list_published(self, filters=None, **kwargs):
"""
Return a list of all published items.
"""
published_filter = self.model_class.published == true()
filters = self._munge_filters(published_filter, filters)
return self.list(filters=filters, **kwargs)
# .... user sharing
# sharing is often done via a 3rd table btwn a User and an item -> a <Item>UserShareAssociation
def _create_user_share_assoc(self, item, user, flush=True):
"""
Create a share for the given user.
"""
user_share_assoc = self.user_share_model()
self.session().add(user_share_assoc)
self.associate(user_share_assoc, item)
user_share_assoc.user = user
# ensure an item slug so shared users can access
if not item.slug:
self.create_unique_slug(item)
if flush:
self.session().flush()
return user_share_assoc
def _query_shared_with(self, user, eagerloads=True, **kwargs):
"""
Return a query for this model already filtered to models shared
with a particular user.
"""
query = self.session().query(self.model_class).join('users_shared_with')
if eagerloads is False:
query = query.enable_eagerloads(False)
# TODO: as filter in FilterParser also
query = query.filter(self.user_share_model.user == user)
return self._filter_and_order_query(query, **kwargs)
# .... slugs
# slugs are human readable strings often used to link to sharable resources (replacing ids)
# TODO: as validator, deserializer, etc. (maybe another object entirely?)
[docs] def set_slug(self, item, new_slug, user, flush=True):
"""
Validate and set the new slug for `item`.
"""
# precondition: has been validated
if not self.is_valid_slug(new_slug):
raise exceptions.RequestParameterInvalidException("Invalid slug", slug=new_slug)
# error if slug is already in use
if self._slug_exists(user, new_slug):
raise exceptions.Conflict("Slug already exists", slug=new_slug)
item.slug = new_slug
if flush:
self.session().flush()
return item
[docs] def is_valid_slug(self, slug):
"""
Returns true if `slug` is valid.
"""
VALID_SLUG_RE = re.compile("^[a-z0-9\-]+$")
return VALID_SLUG_RE.match(slug)
def _existing_set_of_slugs(self, user):
query = (self.session().query(self.model_class.slug)
.filter_by(user=user))
return list(set(query.all()))
def _slug_exists(self, user, slug):
query = (self.session().query(self.model_class.slug)
.filter_by(user=user, slug=slug))
return query.count() != 0
def _slugify(self, start_with):
# Replace whitespace with '-'
slug_base = re.sub("\s+", "-", start_with)
# Remove all non-alphanumeric characters.
slug_base = re.sub("[^a-zA-Z0-9\-]", "", slug_base)
# Remove trailing '-'.
if slug_base.endswith('-'):
slug_base = slug_base[:-1]
return slug_base
def _default_slug_base(self, item):
# override in subclasses
if hasattr(item, 'title'):
return item.title.lower()
return item.name.lower()
[docs] def get_unique_slug(self, item):
"""
Returns a slug that is unique among user's importable items
for item's class.
"""
cur_slug = item.slug
# Setup slug base.
if cur_slug is None or cur_slug == "":
slug_base = self._slugify(self._default_slug_base(item))
else:
slug_base = cur_slug
# Using slug base, find a slug that is not taken. If slug is taken,
# add integer to end.
new_slug = slug_base
count = 1
while (self.session().query(item.__class__)
.filter_by(user=item.user, slug=new_slug, importable=True)
.count() != 0):
# Slug taken; choose a new slug based on count. This approach can
# handle numerous items with the same name gracefully.
new_slug = '%s-%i' % (slug_base, count)
count += 1
return new_slug
[docs] def create_unique_slug(self, item, flush=True):
"""
Set a new, unique slug on the item.
"""
item.slug = self.get_unique_slug(item)
self.session().add(item)
if flush:
self.session().flush()
return item
# TODO: def by_slug( self, user, **kwargs ):
[docs]class SharableModelSerializer(base.ModelSerializer,
taggable.TaggableSerializerMixin, annotatable.AnnotatableSerializerMixin, ratable.RatableSerializerMixin):
# TODO: stub
SINGLE_CHAR_ABBR = None
[docs] def __init__(self, app, **kwargs):
super(SharableModelSerializer, self).__init__(app, **kwargs)
self.add_view('sharing', [
'id',
'title',
'importable',
'published',
'username_and_slug',
'users_shared_with'
])
[docs] def add_serializers(self):
super(SharableModelSerializer, self).add_serializers()
taggable.TaggableSerializerMixin.add_serializers(self)
annotatable.AnnotatableSerializerMixin.add_serializers(self)
ratable.RatableSerializerMixin.add_serializers(self)
self.serializers.update({
'id' : self.serialize_id,
'title' : self.serialize_title,
'username_and_slug' : self.serialize_username_and_slug,
'users_shared_with' : self.serialize_users_shared_with
})
# these use the default serializer but must still be white-listed
self.serializable_keyset.update([
'importable', 'published', 'slug'
])
[docs] def serialize_title(self, item, key, **context):
if hasattr(item, "title"):
return item.title
elif hasattr(item, "name"):
return item.name
[docs] def serialize_username_and_slug(self, item, key, **context):
if not (item.user and item.user.username and item.slug and self.SINGLE_CHAR_ABBR):
return None
return ('/').join(('u', item.user.username, self.SINGLE_CHAR_ABBR, item.slug))
# the only ones that needs any fns:
# user/user_id
# username_and_slug?
[docs]class SharableModelDeserializer(base.ModelDeserializer,
taggable.TaggableDeserializerMixin, annotatable.AnnotatableDeserializerMixin, ratable.RatableDeserializerMixin):
[docs] def add_deserializers(self):
super(SharableModelDeserializer, self).add_deserializers()
taggable.TaggableDeserializerMixin.add_deserializers(self)
annotatable.AnnotatableDeserializerMixin.add_deserializers(self)
ratable.RatableDeserializerMixin.add_deserializers(self)
self.deserializers.update({
'published' : self.deserialize_published,
'importable' : self.deserialize_importable,
'users_shared_with' : self.deserialize_users_shared_with,
})
[docs] def deserialize_published(self, item, key, val, **context):
"""
"""
val = self.validate.bool(key, val)
if item.published == val:
return val
if val:
self.manager.publish(item, flush=False)
else:
self.manager.unpublish(item, flush=False)
return item.published
[docs] def deserialize_importable(self, item, key, val, **context):
"""
"""
val = self.validate.bool(key, val)
if item.importable == val:
return val
if val:
self.manager.make_importable(item, flush=False)
else:
self.manager.make_non_importable(item, flush=False)
return item.importable
# TODO: def deserialize_slug( self, item, val, **context ):
[docs]class SharableModelFilters(base.ModelFilterParser,
taggable.TaggableFilterMixin, annotatable.AnnotatableFilterMixin, ratable.RatableFilterMixin):
def _add_parsers(self):
super(SharableModelFilters, self)._add_parsers()
taggable.TaggableFilterMixin._add_parsers(self)
annotatable.AnnotatableFilterMixin._add_parsers(self)
ratable.RatableFilterMixin._add_parsers(self)
self.orm_filter_parsers.update({
'importable' : {'op': ('eq'), 'val': self.parse_bool},
'published' : {'op': ('eq'), 'val': self.parse_bool},
'slug' : {'op': ('eq', 'contains', 'like')},
# chose by user should prob. only be available for admin? (most often we'll only need trans.user)
# 'user' : { 'op': ( 'eq' ), 'val': self.parse_id_list },
})