def create_blob(self, user, web_id, content, mime_type=None, title=None, tags=[], revises=[]) :
if web_id not in [w.id for w in models.UserWebAccess.get_for_user(user)] :
raise Exception("no such web") # makes sure has explicit access
web = models.Web.get_by_id(web_id)
content_type = "mime:" + (mime_type or "plain/text")
c = models.Content.get_by_stuff(str(content))
b = models.Blob.make_blob(user, content_type, c)
models.WebBlobAccess.add_for_blob(web, b)
for puuid in revises :
parent_blob = models.Blob.get_by_uuid(puuid)
if parent_blob :
relations.BinaryRelation.make(web, user, "revises", b, parent_blob)
# we don't want to just add tags and title; we want to ensure their presence
inherited = relations.get_inherited_relations(web, b)
if title :
inherited_title = [r for r in inherited if not r.deleted and r.name == "title"]
for r in inherited_title :
if r.payload != title :
relations.BinaryRelation.make(web, user, "deletes", b, r.blob)
print "deleting",r
if not any(r.payload == title for r in inherited_title) :
relations.BinaryRelation.make(web, user, "title", b, title)
print "adding"
tags = set([t.strip() for t in tags if t.strip()])
inherited_tags = [r for r in inherited if not r.deleted and r.name == "tag"]
inherited_tags_payloads = set(r.payload for r in inherited_tags)
for r in inherited_tags :
if r.payload not in tags :
relations.BinaryRelation.make(web, user, "deletes", b, r.blob)
for tag in tags :
if tag not in inherited_tags_payloads :
relations.BinaryRelation.make(web, user, "tag", b, tag)
self.channels.broadcast([channel.NewBlobMessage(b)])
return b.uuid
def remove_tag(self, user, web_id, uuid, tag) :
if web_id not in [w.id for w in models.UserWebAccess.get_for_user(user)] :
raise Exception("no such web") # makes sure has explicit access
web = models.Web.get_by_id(web_id)
b = models.Blob.get_by_uuid(uuid)
inherited = relations.get_inherited_relations(web_id, b)
inherited_tags = [r for r in inherited if not r.deleted and r.name == "tag"]
for r in inherited_tags :
if r.payload == tag :
relations.BinaryRelation.make(web, user, "deletes", b, r.blob)
return True
def get_blob_metadata(self, user, web_id, uuids) :
if web_id not in [w.id for w in models.UserWebAccess.get_for_user(user)] :
raise Exception("no such web") # makes sure has explicit access
blobs = []
for uuid in set(uuids) :
b = models.Blob.get_by_uuid(uuid)
if b != None :
srels = relations.get_inherited_relations(web_id, uuid)
orels = relations.CachedRelation.get_for_object(web_id, uuid)
blobs.append({"blob" : self.blob_as_dict(b),
"srels" : [self.rel_as_dict(r) for r in srels],
"orels" : [self.rel_as_dict(r) for r in orels]})
return blobs
