Google calendar sync

eventplanner/__init__.py

@@ -0,0 +1 @@
+

eventplanner/models.py

@@ -2,12 +2,14 @@ from django.db import models
 from django.utils.translation import ugettext as _
 from django.contrib.auth.models import User, Permission
 
-
-from django.db.models import Q
-
 from datetime import datetime
 from location_field.models import PlainLocationField
 
+from django.db.models import Q
+from django.dispatch import Signal
+
+
+
 
 class NoNextEventException( Exception ):
     def __str__(self):
@@ -113,7 +115,10 @@ class Event ( models.Model ):
                     
             return nextEvent
 
-    
+
+before_read = Signal()
+
+
 class EventParticipation( models.Model ):
     OPTIONS = ( ('?'  , _('?'  )),
                 ('Yes', _('Yes')),
@@ -124,7 +129,8 @@ class EventParticipation( models.Model ):
     user      = models.ForeignKey( User, verbose_name=_("user") )
     status    = models.CharField ( max_length=3, choices = OPTIONS, default='?', verbose_name=_("status") )
     comment   = models.CharField ( max_length=64, blank=True, verbose_name=_("comment") )
-    
+
+
     def get_username(self):
         return self.user.username
     
@@ -140,7 +146,11 @@ class EventParticipation( models.Model ):
             return False
         else:
             return True
-    
+
+    @staticmethod
+    def raiseBeforeReadSignal():
+        before_read.send( sender=EventParticipation )
+
     @staticmethod
     def isMember( user ):
         return user.has_perm('eventplanner.member')

eventplanner/views.py

@@ -6,7 +6,6 @@ from django.forms import TextInput
 
 from models import Event, EventParticipation
 
-
 from serializers import ParticipationSerializer
 
 import datetime
@@ -62,7 +61,8 @@ def eventplanning( request ):
     """
         View for a specific user, to edit his events
     """
-    # non-members see the grid - but cannot edit anything 
+    EventParticipation.raiseBeforeReadSignal()
+    # non-members see the grid - but cannot edit anything
     if not EventParticipation.isMember( request.user ):
         return events_grid(request)
     
@@ -78,6 +78,8 @@ def eventplanning( request ):
     
 
 def events_grid( request ):
+    EventParticipation.raiseBeforeReadSignal()
+
     usernames = [ u.username for u in EventParticipation.members()  ]
     
     all_future_events = list ( Event.objects.filter( date__gte = datetime.date.today() ).order_by( 'date') )

eventplanner_gcal/__init__.py

@@ -1 +1,2 @@
-__author__ = 'martin'
+import signals
+

eventplanner_gcal/googleapiTest/createCredentials.py

@@ -0,0 +1,22 @@
+
+from oauth2client.client import OAuth2WebServerFlow
+from oauth2client.file import Storage
+
+
+flow = OAuth2WebServerFlow(client_id='34462582242-4kpdvvbi27ajt4u22uitqurpve9o8ipj.apps.googleusercontent.com',
+                           client_secret='y4t9XBrJdCODPTO5UvtONWWn',
+                           scope='https://www.googleapis.com/auth/calendar',
+                           redirect_uri='http://localhost')
+
+createLink = False
+if createLink:
+  auth_uri = flow.step1_get_authorize_url()
+  print "AuthURI:"
+  print auth_uri
+  print "Visit this link - grab the key from the url and paste it into the else block"
+  exit(0)
+else:
+  code = "4/Iais8aK8_KxbMQjq3Rtw3PFXu6Nr.8itpukY_6ZgZOl05ti8ZT3ax27a3hAI"
+  credentials = flow.step2_exchange( code )
+  storage = Storage('calendarCredentials.dat')
+  storage.put( credentials )

eventplanner_gcal/googleapiTest/test.py

@@ -0,0 +1,76 @@
+from oauth2client.client import OAuth2WebServerFlow
+from apiclient.discovery import build
+from oauth2client.file import Storage
+import httplib2
+
+
+flow = OAuth2WebServerFlow(client_id='34462582242-4kpdvvbi27ajt4u22uitqurpve9o8ipj.apps.googleusercontent.com',
+                           client_secret='y4t9XBrJdCODPTO5UvtONWWn',
+                           scope='https://www.googleapis.com/auth/calendar',
+                           redirect_uri='http://localhost')
+
+
+#auth_uri = flow.step1_get_authorize_url()
+#print "AuthURI:"
+#print auth_uri
+#exit(0)
+
+#code="4/z524dROAcIc24igDftg99LqjyJPG.4jR5ZcA_RPYaOl05ti8ZT3a5aIW3hAI"
+#credentials = flow.step2_exchange( code )
+
+storage = Storage('calendarCredentials.dat')
+credentials = storage.get()
+if credentials is None or credentials.invalid == True:
+   print "Invalid credentials"
+   exit( 0)
+
+
+http = httplib2.Http()
+http = credentials.authorize( http )
+service = build( serviceName='calendar', version='v3', http=http, developerKey='blechreiz-homepage' )
+calendarId = 'blechreizensemble@gmail.com'
+
+
+def getEvents(pageToken=None):
+    events = service.events().list(
+        calendarId='primary',
+        singleEvents=True,
+        maxResults=1000,
+        orderBy='startTime',
+        timeMin='2012-11-01T00:00:00-08:00',
+        timeMax='2018-11-30T00:00:00-08:00',
+        pageToken=pageToken,
+        ).execute()
+    return events
+
+
+def createEvent():
+    print ( "Creating Event ")
+    event = {
+        'summary': 'Blechreiz Probe',
+        'description': 'Eine Beschreibung.. bitte alle instrumente mitbringen',
+        'location': 'Rohr',
+        'start': {
+            'dateTime': '2014-03-23T19:00:00',
+            'timeZone': 'Europe/Berlin'
+        },
+        'end': {
+            'dateTime': '2014-03-23T23:05:00',
+            'timeZone': 'Europe/Berlin'
+        },
+        'attendees': [
+            {
+            'id': 'martinbauer86@gmail.com',
+            'email': 'martinbauer86@gmail.com',
+            'displayName': "MartinB",
+            },
+        ],
+    }
+    created_event = service.events().insert(calendarId='primary', body=event).execute()
+
+
+    print created_event['id']
+  
+
+#createEvent()
+print getEvents()

eventplanner_gcal/models.py

@@ -106,13 +106,20 @@ def buildGCalEvent( event, timezone="Europe/Berlin" ):
 
 # -------------------------------------------------------------------------------
 
-def getAllGCalEvents(pageToken=None):
+def getAllGCalEvents( fromNow=False, pageToken=None ):
+
+    if fromNow:
+        now = datetime.datetime.now()
+        minTime = now.strftime("%Y-%m-%dT%H:%M:%S-00:00")
+    else:
+        minTime = '2000-01-01T00:00:00-00:00'
+
     events = service.events().list(
         calendarId='primary',
         singleEvents=True,
         maxResults=1000,
         orderBy='startTime',
-        timeMin='2000-01-01T00:00:00-00:00',
+        timeMin=minTime,
         timeMax='2100-01-01T00:00:00-00:00',
         pageToken=pageToken,
         privateExtendedProperty='blechreizEvent=true',
@@ -208,3 +215,25 @@ def syncGCalEvents():
     return len (eventsToCreate_djangoID), len(eventsToDelete_googleID )
 
 
+def syncParticipationFromGoogleToLocal():
+    allEvents = getAllGCalEvents(fromNow=True)
+
+    for e in allEvents:
+        localId    = e['extendedProperties']['private']['blechreizID']
+        localEvent = Event.objects.get( pk=localId )
+        for a in e['attendees']:
+            user = User.objects.get( email= a['email'] )
+            part = EventParticipation.get_or_create( user, localEvent )
+            if 'comment' in a:
+                part.comment = a['comment']
+
+            if a['responseStatus'] == 'needsAction' or a['responseStatus']=='tentative':
+                part.status = '?'
+            elif a['responseStatus'] == 'accepted':
+                part.status = 'Yes'
+            elif a['responseStatus'] == 'declined':
+                part.status = 'No'
+            else:
+                logger.error("Unknown response status when mapping gcal event: " + a['responseStatus'] )
+
+            part.save()

eventplanner_gcal/signals.py

@@ -1,27 +1,67 @@
 from django.db.models.signals import post_save,pre_delete
 from django.dispatch import receiver
-from eventplanner.models import Event, EventParticipation
+from eventplanner.models import Event, EventParticipation, before_read
+
+from eventplanner_gcal.models import createGCalEvent, updateGCalEvent
+from eventplanner_gcal.models import deleteGCalEvent, syncParticipationFromGoogleToLocal
+
+
+class SignalLock:
+    def __init__(self):
+        self.locked=False
+
+    def __enter__(self):
+        if self.locked:
+            return False
+
+        self.locked=True
+        return True
+
+    def __exit__(self, type, value, traceback):
+        self.locked=False
+
+    def isLocked(self):
+        return self.locked
+
+signalLock = SignalLock()
 
-from eventplanner_gcal.models import createGCalEvent, updateGCalEvent, deleteGCalEvent
 
 @receiver( post_save,sender= Event)
-def event_post_save_handler(event, **kwargs):
+def event_post_save_handler( **kwargs):
-    created = kwargs['created']
+    if not signalLock.isLocked():
-    if created:
+        with signalLock:
-        createGCalEvent( event ).execute()
+            event = kwargs['instance']
-    else:
+            created = kwargs['created']
-        updateGCalEvent( event ).execute()
+            if created:
+                print("Creating Gcal event")
+                createGCalEvent( event ).execute()
+            else:
+                print( "Updating Gcal event")
+                updateGCalEvent( event ).execute()
+
 
 
 @receiver( pre_delete,sender= Event)
-def event_pre_delete_handler(event, **kwargs):
+def event_pre_delete_handler( **kwargs):
-    deleteGCalEvent( event ).execute()
+    if not signalLock.isLocked():
-
+        with signalLock:
+            event = kwargs['instance']
+            print ("Deleting GCAL event")
+            deleteGCalEvent( event ).execute()
 
 
 @receiver( post_save, sender=EventParticipation )
-def participation_post_save_handler(participation, **kwargs):
+def participation_post_save_handler( **kwargs):
-    updateGCalEvent( participation.event ).execute()
+    if not signalLock.isLocked():
-
+        with signalLock:
+            participation = kwargs['instance']
+            print("Participation post save -> update gcal")
+            updateGCalEvent( participation.event ).execute()
 
 
+@receiver( before_read, sender=EventParticipation )
+def participation_before_read_handler( **kwargs):
+    if not signalLock.isLocked():
+        with signalLock:
+            print("SyncParticipation from google")
+            syncParticipationFromGoogleToLocal()