New version of SampleSyncAdapter sample code that allows local editing

The changes made were
pretty sweeping. The biggest addition was to allow on-device contact
creation/editing, and supporting 2-way sync to the sample server that
runs in Google App Engine.

The client-side sample code also includes examples of how to support
the user of AuthTokens (instead of always sending username/password
to the server), how to change a contact's picture, and how to set
IM-style status messages for each contact.

I also greatly simplified the server code so that instead of mimicking
both an addressbook and an IM-style status update system for multiple
users, it really just simulates an addressbook for a single user. The
server code also includes a cron job that (once a week) blows away the
contact database, so that it's relatively self-cleaning.

Change-Id: I017f1d3f9320a02fe05a20f1613846963107145e

samples/SampleSyncAdapter/samplesyncadapter_server/model/datastore.py

@@ -14,80 +14,51 @@
 # License for the specific language governing permissions and limitations under
 # the License.
 
-"""Represents user's contact information, friends and credentials."""
+"""Represents user's contact information"""
 
 from google.appengine.ext import db
 
 
-class User(db.Model):
+class Contact(db.Model):
   """Data model class to hold user objects."""
 
   handle = db.StringProperty(required=True)
-  firstname = db.TextProperty()
-  lastname = db.TextProperty()
-  status = db.TextProperty()
+  firstname = db.StringProperty()
+  lastname = db.StringProperty()
   phone_home = db.PhoneNumberProperty()
   phone_office = db.PhoneNumberProperty()
   phone_mobile = db.PhoneNumberProperty()
   email = db.EmailProperty()
+  status = db.TextProperty()
+  avatar = db.BlobProperty()
   deleted = db.BooleanProperty()
   updated = db.DateTimeProperty(auto_now_add=True)
 
   @classmethod
-  def get_user_info(cls, username):
+  def get_contact_info(cls, username):
     if username not in (None, ''):
       query = cls.gql('WHERE handle = :1', username)
       return query.get()
     return None
 
   @classmethod
-  def get_user_last_updated(cls, username):
+  def get_contact_last_updated(cls, username):
     if username not in (None, ''):
       query = cls.gql('WHERE handle = :1', username)
       return query.get().updated
     return None
 
   @classmethod
-  def get_user_id(cls, username):
+  def get_contact_id(cls, username):
     if username not in (None, ''):
       query = cls.gql('WHERE handle = :1', username)
       return query.get().key().id()
     return None
 
   @classmethod
-  def get_user_status(cls, username):
+  def get_contact_status(cls, username):
     if username not in (None, ''):
       query = cls.gql('WHERE handle = :1', username)
       return query.get().status
     return None
 
-
-class UserCredentials(db.Model):
-  """Data model class to hold credentials for a Voiper user."""
-
-  username = db.StringProperty(required=True)
-  password = db.StringProperty()
-
-  @classmethod
-  def get(cls, username):
-    if username not in (None, ''):
-      query = cls.gql('WHERE username = :1', username)
-      return query.get().password
-    return None
-
-
-class UserFriends(db.Model):
-  """Data model class to hold user's friendlist info."""
-
-  username = db.StringProperty()
-  friend_handle = db.StringProperty(required=True)
-  updated = db.DateTimeProperty(auto_now_add=True)
-  deleted = db.BooleanProperty()
-
-  @classmethod
-  def get_friends(cls, username):
-    if username not in (None, ''):
-      query = cls.gql('WHERE username = :1', username)
-      friends = query.fetch(50)
-      return friends
-    return None