diff -r 34a75bd8d0b9 -r d48946d164c6 client/src/sagas/syncSaga.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/client/src/sagas/syncSaga.js	Fri Jul 28 19:40:35 2017 +0200
@@ -0,0 +1,41 @@
+import { put, take, all, select } from 'redux-saga/effects'
+import * as types from '../constants/actionTypes';
+import { getLastSync } from './selectors';
+import moment from 'moment';
+import { endSynchronize, updateLastSync } from '../actions/syncActions';
+import SessionSynchronizer from './SessionSyncronizer';
+import NoteSynchronizer from './NoteSyncronizer';
+
+
+function* watchSync(context) {
+  while (true) {
+    yield take(types.SYNC_DO_SYNC);
+    const lastSync = yield select(getLastSync);
+
+
+    //const sessions = yield context.client.get('/api/notes/sessions/', {modified_since: lastSync});
+    const nextLastSync = moment().unix()
+
+    // TODO: manage errors
+    try {
+      const syncObjects = yield context.client.get('/api/notes/sync/', { modified_since: lastSync });
+
+      const sessionSynchronizer = new SessionSynchronizer(syncObjects.sessions, context.client);
+      yield sessionSynchronizer.syncObjects();
+
+      const noteSynchronizer = new NoteSynchronizer(syncObjects.notes, context.client);
+      yield noteSynchronizer.syncObjects();
+
+      yield put(updateLastSync(nextLastSync));
+    } finally {
+      yield put(endSynchronize());
+    }
+  }
+}
+
+//--- The root saga
+export default function* rootSaga(context) {
+  yield all([
+    watchSync(context)
+  ]);
+}