# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
import json
from datetime import datetime
from ed25519_utils import valid
import settings
from settings import db
import state
from websocket import trigger_event
class Changelog(db.Model):
'''
additem itemid metadata from file (info) + OLID
edititem itemid name->id (i.e. olid-> OL...M)
removeitem itemid
addlist name
editlist name {name: newname}
orderlists [name, name, name]
removelist name
addlistitems listname [ids]
removelistitems listname [ids]
editusername username
editcontact string
addpeer peerid peername
removepeer peerid peername
'''
id = db.Column(db.Integer(), primary_key=True)
created = db.Column(db.DateTime())
user_id = db.Column(db.String(43))
revision = db.Column(db.BigInteger())
data = db.Column(db.Text())
sig = db.Column(db.String(96))
@classmethod
def record(cls, user, action, *args):
c = cls()
c.created = datetime.now()
c.user_id = user.id
c.revision = cls.query.filter_by(user_id=user.id).count()
c.data = json.dumps([action, args])
timestamp = c.timestamp
_data = str(c.revision) + str(timestamp) + c.data
c.sig = settings.sk.sign(_data, encoding='base64')
db.session.add(c)
db.session.commit()
if state.online:
state.nodes.queue('peered', 'pushChanges', [c.json()])
@property
def timestamp(self):
return self.created.strftime('%s')
@classmethod
def apply_change(cls, user, change, rebuild=False):
revision, timestamp, sig, data = change
last = Changelog.query.filter_by(user_id=user.id).order_by('-revision').first()
next_revision = last.revision + 1 if last else 0
if revision == next_revision:
_data = str(revision) + str(timestamp) + data
if rebuild:
sig = settings.sk.sign(_data, encoding='base64')
if valid(user.id, _data, sig):
c = cls()
c.created = datetime.now()
c.user_id = user.id
c.revision = revision
c.data = data
c.sig = sig
action, args = json.loads(data)
print 'apply change', action
if getattr(c, 'action_' + action)(user, timestamp, *args):
print 'change applied'
db.session.add(c)
db.session.commit()
return True
else:
print 'INVLAID SIGNATURE ON CHANGE', change
raise Exception, 'invalid signature'
else:
print 'revsion does not match! got', revision, 'expecting', next_revision
return False
def __repr__(self):
return self.data
def verify(self):
_data = str(self.revision) + str(self.timestamp) + self.data
return valid(self.user_id, _data, self.sig)
def json(self):
return [self.revision, self.timestamp, self.sig, self.data]
@classmethod
def restore(cls, user_id, path=None):
from user.models import User
user = User.get_or_create(user_id)
if not path:
path = '/tmp/oml_changelog_%s.json' % user_id
with open(path, 'r') as fd:
for change in fd:
change = json.loads(change)
cls.apply_change(user, change, user_id == settings.USER_ID)
@classmethod
def export(cls, user_id, path=None):
if not path:
path = '/tmp/oml_changelog_%s.json' % user_id
with open(path, 'w') as fd:
for c in cls.query.filter_by(user_id=user_id).order_by('revision'):
fd.write(json.dumps(c.json()) + '\n')
def action_additem(self, user, timestamp, itemid, info):
from item.models import Item
i = Item.get(itemid)
if i and i.timestamp > timestamp:
return True
if not i:
i = Item.get_or_create(itemid, info)
i.users.append(user)
i.update()
trigger_event('itemchange', {'fixme': 'new remote changes'})
return True
def action_edititem(self, user, timestamp, itemid, meta):
from item.models import Item
i = Item.get(itemid)
if i.timestamp > timestamp:
return True
key = meta.keys()[0]
if not meta[key] and i.meta.get('mainid') == key:
print 'remove id mapping', key, meta[key], 'currently', i.meta[key]
i.update_mainid(key, meta[key])
elif meta[key] and (i.meta.get('mainid') != key or meta[key] != i.meta.get(key)):
print 'new mapping', key, meta[key], 'currently', i.meta.get('mainid'), i.meta.get(i.meta.get('mainid'))
i.update_mainid(key, meta[key])
trigger_event('itemchange', {'fixme': 'new remote changes'})
return True
def action_removeitem(self, user, timestamp, itemid):
from item.models import Item
i = Item.get(itemid)
if not i or i.timestamp > timestamp:
return True
i.users.remove(user)
if i.users:
i.update()
else:
db.session.delete(i)
db.session.commit()
trigger_event('itemchange', {'fixme': 'new remote changes'})
return True
def action_addlist(self, user, timestamp, name, query=None):
from user.models import List
l = List.create(user.id, name)
return True
def action_editlist(self, user, timestamp, name, new):
from user.models import List
l = List.get_or_create(user.id, name)
if 'name' in new:
l.name = new['name']
l.save()
return True
def action_orderlists(self, user, timestamp, lists):
from user.models import List
position = 0
for name in lists:
l = List.get_or_create(user.id, name)
l.position = position
l.save()
position += 1
return True
def action_removelist(self, user, timestamp, name):
from user.models import List
l = List.get(user.id, name)
if l:
l.remove()
return True
def action_addlistitems(self, user, timestamp, name, ids):
from user.models import List
l = List.get_or_create(user.id, name)
l.add_items(ids)
return True
def action_removelistitems(self, user, timestamp, name, ids):
from user.models import List
l = List.get(user.id, name)
if l:
l.remove_items(ids)
return True
def action_editusername(self, user, timestamp, username):
user.info['username'] = username
user.save()
return True
def action_editcontact(self, user, timestamp, contact):
user.info['contact'] = contact
user.save()
return True
def action_addpeer(self, user, timestamp, peerid, username):
from user.models import User
if not 'users' in user.info:
user.info['users'] = {}
user.info['users'][peerid] = username
user.save()
peer = User.get_or_create(peerid)
if not 'username' in peer.info:
peer.info['username'] = username
peer.save()
return True
def action_removepeer(self, user, timestamp, peerid):
if 'users' in user.info and peerid in user.info['users']:
del user.info['users'][peerid]
user.save()
#fixme, remove from User table if no other connection exists
return True