user per peer library (sqlitedict)

oml/item/models.py

@@ -3,7 +3,6 @@
 from datetime import datetime
 import base64
 import hashlib
-import json
 import os
 import re
 import shutil
@@ -98,6 +97,13 @@ class Item(db.Model):
     def find(cls, data):
         return Parser(cls, user_items, Find, Sort).find(data)
 
+    @classmethod
+    def remove_many(cls, ids):
+        Find.query.filter(Find.item_id.in_(ids)).delete(synchronize_session=False)
+        Sort.query.filter(Sort.item_id.in_(ids)).delete(synchronize_session=False)
+        cls.query.filter(cls.id.in_(ids)).delete(synchronize_session=False)
+        state.db.session.expire_all()
+
     def add_user(self, user):
         if not user in self.users:
             self.users.append(user)
@@ -336,7 +342,7 @@ class Item(db.Model):
             f.move()
 
     def get_hash(self):
-        return utils.get_meta_hash(self.meta.copy())
+        return utils.get_meta_hash(self.meta)
 
     def get_sorttitle(self):
         title = self.meta.get('sorttitle')
@@ -346,7 +352,6 @@ class Item(db.Model):
         return title
 
     def sync_metadata(self):
-        from user.models import Metadata
         if self.meta.get('sharemetadata'):
             return
         peers = [u for u in self.users if u.id != settings.USER_ID]
@@ -355,34 +360,44 @@ class Item(db.Model):
         first_peer = None
         # get first peer with sharemetadata set
         for u in peers:
-            m = Metadata.get(u.id, self.id)
+            peer = utils.get_peer(u.id)
+            if self.id in peer.library:
+                m = peer.library[self.id].get('meta')
+            else:
+                m = None
             if m:
-                if m.data.get('sharemetadata'):
+                if m.get('sharemetadata'):
-                    sync_from = m
+                    sync_from = u.id
                     break
                 if not first_peer:
-                    first_peer = m
+                    first_peer = u.id
         # of fall back to first peer that has this item
         # in case its not available locally
         if not sync_from and self.info.get('mediastate') != 'available' and first_peer:
             #logger.debug('syncing from first peer that has item %s', first_peer)
             sync_from = first_peer
         if sync_from:
-            if self.get_hash() != sync_from.data_hash:
+            peer = utils.get_peer(sync_from)
-                logger.debug('update %s with metadata from %s', self, sync_from.user_id)
+            data_hash = peer.get_metahash(self.id)
+            item = peer.library[self.id]
+            sync_meta = item['meta']
+            sync_modified = item.get('modified')
+            if self.get_hash() != data_hash:
+                logger.debug('update %s with metadata from %s', self, sync_from)
                 record = {}
-                for key in sync_from.data:
+                for key in sync_meta:
-                    if key != 'sharemetadata' and self.meta.get(key) != sync_from.data[key]:
+                    if key != 'sharemetadata' and self.meta.get(key) != sync_meta[key]:
-                        record[key] = self.meta[key] = sync_from.data[key]
+                        record[key] = self.meta[key] = sync_meta[key]
-                for key in set(self.meta)-set(sync_from.data):
+                for key in set(self.meta)-set(sync_meta):
                     record[key] = self.meta[key] = [] if key in self.array_keys else ''
-                self.update(sync_from.modified)
+                self.update(sync_modified)
                 self.save()
                 user = state.user()
                 if record and user in self.users:
                     Changelog.record(user, 'edititem', self.id, record, _ts=self.modified)
                 if 'cover' in record:
-                    self.update_cover()
+                    if state.tasks:
+                        state.tasks.queue('getcover', self.id)
 
     def extract_preview(self):
         path = self.get_path()
@@ -450,7 +465,7 @@ class Item(db.Model):
     def update_icons(self):
         if state.online:
             self.update_cover()
-        else:
+        elif state.tasks:
             state.tasks.queue('getcover', self.id)
         self.update_preview()
 

oml/library.py

@@ -0,0 +1,343 @@
+# -*- coding: utf-8 -*-
+# vi:si:et:sw=4:sts=4:ts=4
+import json
+import os
+import time
+
+import ox
+from sqlitedict import SqliteDict
+
+import db
+import settings
+import state
+import utils
+from websocket import trigger_event
+
+import logging
+logger = logging.getLogger(__name__)
+
+COMMIT_TIMEOUT = 20
+
+def maybe_commit(t0):
+    if time.time() - t0 > COMMIT_TIMEOUT:
+        state.db.session.commit()
+        t0 = time.time()
+    return t0
+
+class Peer(object):
+    def __init__(self, id):
+        base = os.path.join(settings.data_path, 'peers')
+        ox.makedirs(base)
+        self._dbpath = os.path.join(base, '%s.db' % id)
+        self._infopath = os.path.join(base, '%s.json' % id)
+
+        self.id = id
+        self.library = SqliteDict(self._dbpath, tablename='library', autocommit=False)
+
+        if os.path.exists(self._infopath):
+            with open(self._infopath) as f:
+                self.info = json.load(f)
+        else:
+            self.info = {}
+        if not 'peers' in self.info:
+            self.info['peers'] = {}
+        if not 'lists' in self.info:
+            self.info['lists'] = {}
+
+    def apply_changes(self, changes):
+        r = True
+        for change in changes:
+            if state.shutdown:
+                r = False
+                break
+            if not self.apply_change(change):
+                logger.debug('FAIL %s', change)
+                r = False
+                break
+        self.library.commit()
+        self.sync_info()
+        self.sync_db()
+        trigger_event('change', {})
+        return r
+
+    def apply_change(self, change):
+        revision, timestamp, data = change
+        action = data[0]
+        args = data[1:]
+        #logger.debug('apply change: %s(%s)', action, args)
+        if action == 'additem':
+            itemid, info = args
+            item = self.library.get(itemid, {})
+            item['info'] = info
+            item['modified'] = utils.ts2datetime(timestamp)
+            self.library[itemid] = item
+            # trigger additem
+        elif action == 'edititem':
+            itemid, meta = args
+            item = self.library.get(itemid, {})
+            if not 'meta' in item:
+                item['meta'] = meta
+            else:
+                item['meta'].update(meta)
+            item['meta_hash'] = utils.get_meta_hash(item['meta'])
+            item['modified'] = utils.ts2datetime(timestamp)
+            self.library[itemid] = item
+            if state.tasks:
+                state.tasks.queue('syncmetadata', [itemid])
+                state.tasks.queue('getpreview', itemid)
+        elif action == 'removeitem':
+            itemid = args[0]
+            if itemid in self.library:
+                del self.library[itemid]
+        elif action == 'addlist':
+            name = args[0]
+            if len(args) > 1:
+                query = args[1]
+            if not name in self.info['lists']:
+                self.info['lists'][name] = []
+        elif action == 'editlist':
+            name, new = args
+            if name in self.info['lists']:
+                self.info['lists'][new] = self.info['lists'].pop(name)
+            else:
+                self.info['lists'][new] = []
+        elif action == 'orderlists':
+            self.info['listorder'] = args[0]
+        elif action == 'removelist':
+            name = args[0]
+            if name in self.info['lists']:
+                del self.info['lists'][name]
+        elif action == 'addlistitems':
+            name, ids = args
+            if not name in self.info['lists']:
+                self.info['lists'][name] = []
+            self.info['lists'][name] = list(set(self.info['lists'][name]) | set(ids))
+        elif action == 'removelistitems':
+            name, ids = args
+            if name in self.info['lists']:
+                self.info['lists'][name] = list(set(self.info['lists'][name]) - set(ids))
+        elif action == 'addpeer':
+            peerid, username = args
+            if len(peerid) == 16:
+                self.info['peers'][peerid] = {'username': username}
+            # fixme, just trigger peer update here
+            from user.models import User
+            peer = User.get_or_create(peerid)
+            if not 'username' in peer.info:
+                peer.info['username'] = username
+                peer.update_name()
+                peer.save()
+        elif action == 'editpeer':
+            peerid, data = args
+            if len(peerid) == 16:
+                if not peerid in self.info['peers']:
+                    self.info['peers'][peerid] = {}
+                for key in ('username', 'contact'):
+                    if key in data:
+                        self.info['peers'][peerid][key] = data[key]
+            # fixme, just trigger peer update here
+            from user.models import User
+            peer = User.get_or_create(peerid)
+            update = False
+            if not peer.peered:
+                for key in ('username', 'contact'):
+                    if key in data and peer.info.get(key) != data[key]:
+                        peer.info[key] = data[key]
+                        update = True
+            if update:
+                peer.save()
+        elif action == 'removepeer':
+            peerid = args[0]
+            if peerid in self.peers['peers']:
+                del self.info['peers']
+            # trigger peer update
+        elif action == 'editusername':
+            self.info['username'] = args[0]
+        elif action == 'editcontact':
+            self.info['contact'] = args[0]
+        else:
+            logger.debug('UNKNOWN ACTION:', action)
+        self.info['revision'] = revision
+        return True
+
+    def get_metahash(self, itemid):
+        item = self.library[itemid]
+        if 'meta_hash' not in item:
+            item['meta_hash'] = utils.get_meta_hash(item['meta'])
+            self.library[itemid] = item
+        return item['meta_hash']
+
+    def sync_info(self):
+        with open(self._infopath, 'w') as fd:
+            json.dump(self.info, fd, indent=4, sort_keys=True)
+
+    def join(self):
+        #self.library.join()
+        self.library.close()
+        self.sync_info()
+
+    def remove(self):
+        self.join()
+        os.unlink(self._dbpath)
+        os.unlink(self._infopath)
+
+    def sync_db(self):
+        import item.models
+        import user.models
+        c_user_id = item.models.user_items.columns['user_id']
+        c_item_id = item.models.user_items.columns['item_id']
+        l_list_id = user.models.list_items.columns['list_id']
+        l_item_id = user.models.list_items.columns['item_id']
+        q = item.models.user_items.select().where(c_user_id.is_(self.id))
+        current = set([r[1] for r in state.db.session.execute(q)])
+        library = set(self.library.keys())
+        remove = list(current - library)
+        logger.debug('remove %s', len(remove))
+        u = user.models.User.get(self.id)
+        listid = u.library.id
+        lists = [l.id for l in u.lists.all()]
+        getpreview = []
+        t0 = time.time()
+        if remove:
+            q = item.models.user_items.delete().where(c_user_id.is_(self.id)).where(c_item_id.in_(remove))
+            state.db.session.execute(q)
+            q = user.models.list_items.delete().where(l_list_id.in_(lists)).where(l_item_id.in_(remove))
+            state.db.session.execute(q)
+        add = list(library - current)
+        logger.debug('add %s', len(add))
+        listitems = {}
+        q = user.models.list_items.select().where(l_list_id.in_(lists))
+        for row in state.db.session.execute(q):
+            if not row['list_id'] in listitems:
+                listitems[row['list_id']] = set()
+            listitems[row['list_id']].add(row['item_id'])
+        t0 = maybe_commit(t0)
+        if add:
+            t0 = time.time()
+            q = item.models.user_items.select().where(c_user_id.is_(self.id))
+            useritems = {r['item_id'] for r in state.db.session.execute(q)}
+            for itemid in add:
+                i = item.models.Item.get(itemid)
+                if not i:
+                    i = item.models.Item(id=itemid)
+                    m = self.library.get(itemid, {})
+                    i.info.update(m.get('info', {}))
+                    i.meta = m.get('meta', {})
+                    state.db.session.add(i)
+                    getpreview.append(itemid)
+                if itemid not in useritems:
+                    q = item.models.user_items.insert({'item_id': itemid, 'user_id': self.id})
+                    state.db.session.execute(q)
+                if itemid not in listitems.get(listid, []):
+                    q = user.models.list_items.insert({'item_id': itemid, 'list_id': listid})
+                    state.db.session.execute(q)
+                if state.shutdown:
+                    break
+                t0 = maybe_commit(t0)
+        state.db.session.commit()
+        if remove:
+            q = item.models.user_items.select()
+            user_items = {i['item_id'] for i in state.db.session.execute(q)}
+            removed_items = set(remove)-user_items
+            if removed_items:
+                item.models.Item.remove_many(removed_items)
+            state.db.session.commit()
+        if state.shutdown:
+            return
+        for itemid in getpreview:
+            state.tasks.queue('getpreview', itemid)
+        update_items = remove + add
+
+        current_lists = set(l.name for l in u.lists.all() if l.name)
+        add = list(set(self.info['lists']) - current_lists)
+        remove = list(current_lists - set(self.info['lists']))
+        t0 = time.time()
+        for l in u.lists.all():
+            if l.name:
+                logger.debug('update list %s', l.name)
+                if l.name in remove:
+                    l.remove(commit=False)
+                else:
+                    if l.id in listitems:
+                        ladd = list(set(self.info['lists'][l.name]) - set(listitems[l.id]))
+                        lremove = list(set(listitems[l.id]) - set(self.info['lists'][l.name]))
+                        if ladd:
+                            l.add_items(ladd, commit=False)
+                            update_items = list(set(update_items) - set(ladd))
+                        if lremove:
+                            l.remove_items(lremove, commit=False)
+                    else:
+                        l.add_items(self.info['lists'][l.name], commit=False)
+                        update_items = list(set(update_items) - set(self.info['lists'][l.name]))
+            if state.shutdown:
+                break
+            t0 = maybe_commit(t0)
+        state.db.session.commit()
+        if state.shutdown:
+            return
+        if add:
+            for name in add:
+                logger.debug('add list %s', name)
+                l = user.models.List.get_or_create(self.id, name)
+                l.add_items(self.info['lists'][name], commit=False)
+                trigger_event('addlist', {'id': l.public_id, 'user': self.id})
+                update_items = list(set(update_items) - set(self.info['lists'][name]))
+                if state.shutdown:
+                    break
+        logger.debug('update %s', len(update_items))
+        t0 = time.time()
+        if update_items:
+            for i in item.models.Item.query.filter(item.models.Item.id.in_(update_items)):
+                i.update(commit=False)
+                t0 = maybe_commit(t0)
+                if state.shutdown:
+                    break
+        state.db.session.commit()
+
+def sync_db():
+    from sqlalchemy.orm import load_only
+    import item.models
+    with db.session():
+        sort_ids = {i.item_id for i in item.models.Sort.query.options(load_only('item_id'))}
+        if sort_ids:
+            t0 = time.time()
+            commit = False
+            for i in item.models.Item.query.filter(item.models.Item.id.notin_(sort_ids)):
+                i.update(commit=False)
+                if i.info['mediastate'] == 'unavailable' and state.tasks:
+                    state.tasks.queue('getpreview', i.id)
+                commit = True
+                #logger.debug('sync:%s', i)
+                t0 = maybe_commit(t0)
+                if state.shutdown:
+                    break
+            if commit:
+                state.db.session.commit()
+    cleanup_lists()
+
+def cleanup_lists():
+    from sqlalchemy.orm import load_only
+    import item.models
+    import user.models
+    with db.session():
+        for l in user.models.List.query.all():
+            if not l.user.peered and not l.user.id == settings.USER_ID:
+                l.remove()
+
+        peers = [u.id for u in user.models.User.query.filter_by(peered=True)] + [settings.USER_ID]
+        q = item.models.user_items.delete().where(item.models.user_items.columns['user_id'].notin_(peers))
+        state.db.session.execute(q)
+
+        lists = [l.id for l in user.models.List.query.all()]
+        q = user.models.list_items.delete().where(user.models.list_items.columns['list_id'].notin_(lists))
+        state.db.session.execute(q)
+
+        state.db.session.commit()
+
+        q = item.models.user_items.select()
+        user_items = {i['item_id'] for i in state.db.session.execute(q)}
+        ids = {i.id for i in item.models.Item.query.options(load_only('id'))}
+        remove = ids - user_items
+        if remove:
+            item.models.Item.remove_many(remove)
+        state.db.session.commit()

oml/node/nodeapi.py

@@ -49,8 +49,9 @@ def api_requestPeering(user_id, username, message):
 
 def api_acceptPeering(user_id, username, message):
     user = User.get(user_id)
+    if user:
         logger.debug('incoming acceptPeering event: pending: %s', user.pending)
-    if user and user.pending == 'sent':
+        if user.pending == 'sent':
             user.info['username'] = username
             user.info['message'] = message
             user.update_name()
@@ -58,7 +59,7 @@ def api_acceptPeering(user_id, username, message):
             state.nodes.queue('add', user.id, True)
             trigger_event('peering.accept', user.json())
             return True
-    elif user and user.peered:
+        elif user.peered:
             return True
     return False
 

oml/nodes.py

@@ -22,9 +22,10 @@ from changelog import Changelog
 from websocket import trigger_event
 from localnodes import LocalNodes
 from tor_request import get_opener
-from utils import user_sort_key
+from utils import user_sort_key, get_peer
 import state
 import db
+import library
 
 import logging
 logger = logging.getLogger(__name__)
@@ -247,24 +248,21 @@ class Node(Thread):
     def pullChanges(self):
         with db.session():
             u = user.models.User.get_or_create(self.user_id)
-            if not self.online or not u.peered:
+            if not u or not self.online or not u.peered:
                 return True
-            last = Changelog.query.filter_by(user_id=self.user_id).order_by('-revision').first()
+        peer = get_peer(self.user_id)
-            from_revision = last.revision + 1 if last else 0
+        from_revision = peer.info.get('revision', -1) + 1
         try:
             changes = self.request('pullChanges', from_revision)
         except:
             self.online = False
-                logger.debug('%s went offline', u.name)
+            logger.debug('%s went offline', u.name, ext_info=True)
             return False
         if not changes:
             return False
-            try:
+        #with open('/tmp/changelog_%s_%s.json' % (self.user_id, from_revision), 'w') as f:
-                r = Changelog.apply_changes(u, changes, first=from_revision == 0)
+        #    json.dump(changes, f, ensure_ascii=False, indent=4)
-            except:
+        return peer.apply_changes(changes)
-                logger.debug('apply_changes failed', exc_info=True)
-                r = False
-            return r
 
     def peering(self, action):
         with db.session():
@@ -411,13 +409,14 @@ class Nodes(Thread):
                     del u.info['local']
                     u.save()
                 self.queue('add', u.id)
+                state.peers[u.id] = library.Peer(u.id)
             for u in user.models.User.query.filter_by(queued=True):
                 logger.debug('adding queued node... %s', u.id)
                 self.queue('add', u.id, True)
         self._local = LocalNodes()
         self._cleanup = PeriodicCallback(lambda: self.queue('cleanup'), 120000)
         self._cleanup.start()
-        self._pullcb = PeriodicCallback(self.pull, 60000)
+        self._pullcb = PeriodicCallback(self.pull, settings.server['pull_interval'])
         self._pullcb.start()
         Thread.__init__(self)
         self.daemon = True
@@ -475,6 +474,7 @@ class Nodes(Thread):
         if state.activity and state.activity.get('activity') == 'import':
             return
         self._pulling = True
+        library.sync_db()
         users = []
         with db.session():
             from user.models import User
@@ -493,6 +493,7 @@ class Nodes(Thread):
         self._pulling = False
 
     def run(self):
+        self.queue('pull')
         while not state.shutdown:
             args = self._q.get()
             if args:
@@ -519,7 +520,6 @@ def publish_node():
     state.check_nodes.start()
     state._online = PeriodicCallback(update_online, 60000)
     state._online.start()
-    state.nodes.pull()
 
 def update_online():
     online = state.tor and state.tor.is_online()

oml/server.py

@@ -74,11 +74,16 @@ def shutdown():
     if state.tasks:
         logger.debug('shutdown tasks')
         state.tasks.join()
+    if state.update:
+        logger.debug('shutdown updates')
+        state.update.join()
     if state.node:
         state.node.stop()
     if state.tor:
         logger.debug('shutdown tor')
         state.tor.shutdown()
+    for peer in state.peers:
+        state.peers[peer].join()
     if state.PID and os.path.exists(state.PID):
         logger.debug('remove %s', state.PID)
         os.unlink(state.PID)
@@ -163,7 +168,7 @@ def run():
         state.tasks = tasks.Tasks()
         state.main.add_callback(start_node)
     else:
-        state.tasks = update.Update()
+        state.update = update.Update()
 
     if ':' in settings.server['address']:
         host = '[%s]' % settings.server['address']

oml/settings.py

@@ -48,6 +48,7 @@ server_defaults = {
     'extract_text': True,
     'localnode_discovery': True,
     'release_url': 'http://downloads.openmedialibrary.com/release.json',
+    'pull_interval': 60000
 }
 
 for key in server_defaults:
@@ -99,4 +100,4 @@ USER_AGENT = 'OpenMediaLibrary/%s' % VERSION
 
 DEBUG_HTTP = server.get('debug_http', False)
 
-DB_VERSION = 10
+DB_VERSION = 11

oml/state.py

@@ -10,6 +10,7 @@ tor = False
 update = False
 shutdown = False
 websockets = []
+peers = {}
 
 activity = {}
 removepeer = {}

oml/update.py

@@ -342,6 +342,8 @@ class Update(Thread):
                 db_version = migrate_8()
             if db_version < 10:
                 db_version = migrate_10()
+            if db_version < 11:
+                db_version = migrate_11()
             settings.server['db_version'] = settings.DB_VERSION
 
     def run(self):
@@ -513,3 +515,27 @@ def migrate_10():
                 Find.query.filter_by(key=key, value=value).update({'sortvalue': updates[key][value]})
         session.commit()
     return 10
+
+def migrate_11():
+    with db.session() as session:
+        from user.models import User, Metadata
+        from changelog import Changelog
+        import utils
+        for u in User.query.filter_by(peered=True):
+            peer = utils.get_peer(u.id)
+            last = Changelog.query.filter_by(user_id=u.id).order_by('-revision').first()
+            if last:
+                peer.info['revision'] = last.revision
+            for m in Metadata.query.filter_by(user_id=u.id):
+                peer.library[m.item_id] = {
+                    'meta': dict(m.data),
+                    'meta_hash': m.data_hash,
+                    'modified': m.modified,
+                }
+            peer.library.commit()
+            peer.sync_info()
+            peer.sync_db()
+            Changelog.query.filter_by(user_id=u.id).delete()
+            Metadata.query.filter_by(user_id=u.id).delete()
+        session.commit()
+    return 11

oml/user/models.py

@@ -93,6 +93,11 @@ class User(db.Model):
         if self.id == settings.USER_ID:
             j['username'] = settings.preferences['username']
             j['contact'] = settings.preferences['contact']
+        elif self.id in state.peers:
+            peer = state.peers[self.id]
+            for key in ('username', 'contact'):
+                if key in peer.info:
+                    j[key] = peer.info[key]
         if keys:
             for k in set(j) - set(keys):
                 del j[k]
@@ -161,6 +166,9 @@ class User(db.Model):
         Changelog.query.filter_by(user_id=self.id).delete()
         Metadata.query.filter_by(user_id=self.id).delete()
         self.save()
+        if self.id in state.peers:
+            state.peers[self.id].remove()
+            del state.peers[self.id]
 
     def update_name(self):
         if self.id == settings.USER_ID:
@@ -297,7 +305,7 @@ class List(db.Model):
             if update_conditions(l._query.get('conditions', [])):
                 l.save()
 
-    def add_items(self, items):
+    def add_items(self, items, commit=True):
         from item.models import Item
         for item_id in items:
             i = Item.get(item_id)
@@ -305,8 +313,9 @@ class List(db.Model):
                 self.items.append(i)
                 if self.user_id == settings.USER_ID:
                     i.queue_download()
-                i.update()
+                i.update(commit=commit)
         state.db.session.add(self)
+        if commit:
             state.db.session.commit()
         if self.user_id == settings.USER_ID and self.name != '':
             Changelog.record(self.user, 'addlistitems', self.name, items)
@@ -318,27 +327,29 @@ class List(db.Model):
         else:
             return self.user.items.join(Item.lists, aliased=True).filter(List.id == self.id)
 
-    def remove_items(self, items):
+    def remove_items(self, items, commit=True):
         from item.models import Item
         for item_id in items:
             i = Item.get(item_id)
             if i:
                 if i in self.items:
                     self.items.remove(i)
-                i.update()
+                i.update(commit=commit)
         state.db.session.add(self)
+        if commit:
             state.db.session.commit()
         if self.user_id == settings.USER_ID and self.name != '':
             Changelog.record(self.user, 'removelistitems', self.name, items)
 
-    def remove(self):
+    def remove(self, commit=True):
         if not self._query:
-            for i in self.items:
+            q = list_items.delete().where(list_items.columns['list_id'].is_(self.id))
-                self.items.remove(i)
+            state.db.session.execute(q)
         if not self._query:
             if self.user_id == settings.USER_ID and self.name != '':
                 Changelog.record(self.user, 'removelist', self.name)
         state.db.session.delete(self)
+        if commit:
             state.db.session.commit()
 
     @property
@@ -445,7 +456,7 @@ class Metadata(db.Model):
         return m
 
     def get_hash(self):
-        return utils.get_meta_hash(self.data.copy())
+        return utils.get_meta_hash(self.data)
 
     def save(self, commit=True, modified=None):
         if modified is None:

oml/utils.py

@@ -409,6 +409,7 @@ def get_ratio(data):
 
 
 def get_meta_hash(data):
+    data = data.copy()
     if 'sharemetadata' in data:
         del data['sharemetadata']
     for key in list(data):
@@ -469,3 +470,10 @@ def ctl(*args):
 
 def user_sort_key(u):
     return ox.sort_string(str(u.get('index', '')) + 'Z' + (u.get('name') or ''))
+
+def get_peer(peerid):
+    import state
+    import library
+    if peerid not in state.peers:
+        state.peers[peerid] = library.Peer(peerid)
+    return state.peers[peerid]

requirements-shared.txt

@@ -8,3 +8,4 @@ python-stdnum==0.9
 PyPDF2==1.23
 pysocks
 stem
+sqlitedict==1.4.0