updates ical output to convert event times to calendar timzone based time

- icalToCalendarDB converts the information the user puts into the form
  on the calendar.html page and pulls the calendar from the url.
  It then passes it into the database.

- fetchCanedarEvents gets all events within a startDate and an endDate
  and removes any all day events. This is currently a bit costly, because
  it takes some time for the ics library to download the entire .ical
  file from the url. Then it goes through every entry ever added to the
  file and saves only the future events.

__init__.py

@@ -16,8 +16,9 @@ API_SERVICE_NAME = 'calendar'
 API_VERSION = 'v3'
 
 class Calendar:
-    def __init__(self, name, calendarId, toggle='False', color="#000000"):
+    def __init__(self, name, calendarId, calType, toggle='False', color="#000000"):
         self.name = name
+        self.calType = calType
         self.color = color
         self.toggle=toggle
         self.calendarId = calendarId
@@ -66,37 +67,6 @@ class Event:
             print(self.name + "All Day")
 
     
-def calendarCredentials(token = None):
-    creds = None
-    # The file token.pickle stores the user's access and refresh tokens, and is
-    # created automatically when the authorization flow completes for the first
-    # time.
-
-    if token == None:
-        if os.path.exists('token.pickle'):
-            with open('token.pickle', 'rb') as token:
-                token.seek(0)
-                creds = pickle.load(token)
-    
-    else:
-        creds = pickle.load(token)
-
-    # If there are no (valid) credentials available, let the user log in.
-    if not creds or not creds.valid:
-        if creds and creds.expired and creds.refresh_token:
-            creds.refresh(Request())
-        else:
-            flow = InstalledAppFlow.from_client_secrets_file(
-                'credentials.json', SCOPES)
-            creds = flow.run_local_server(port=1234)
-        # Save the credentials for the next run
-        with open('token.pickle', 'wb') as token:
-            pickle.dump(creds, token)
-
-    service = build('calendar', 'v3', credentials=creds)
-    
-    return service
-    
 def updateCalendars(user, calendars, colors):
     
     if user == None or calendars == None or colors == None:
@@ -112,6 +82,7 @@ def updateCalendars(user, calendars, colors):
         if not user.hasCalendar(calendar.calendarId):
             color = fromColorIdGetColor(calendar.color, colormap, colors)
             c = dbCalendar(calendar_id = calendar.calendarId, 
+                           calendar_type = calendar.calType,
                            name = calendar.name,
                            toggle = "False",
                            color = color)
@@ -127,12 +98,13 @@ def calendarsFromDb(user):
         calendarId = calendar.calendar_id
         toggle = calendar.toggle
         color = calendar.color
+        calType = calendar.calendar_type
 
-        pyCalendars.append(Calendar(name, calendarId, toggle, color))
+        pyCalendars.append(Calendar(name, calendarId, calType, toggle, color))
 
     return pyCalendars
 
-
+# removes not visible calendars from the list of all calendars
 def purgeCalendars(calendars, visibleCalendars):
     purged = []
     for calendar in calendars:
@@ -140,7 +112,8 @@ def purgeCalendars(calendars, visibleCalendars):
             purged.append(calendar)
     return purged
 
-
+# remaps a event color id to a calendar color id
+# for google calendars
 def toCalendarColorId(colormap, colorId):
     for remap in colormap['eventRemap']:
         if remap['from'] == colorId:
@@ -149,6 +122,8 @@ def toCalendarColorId(colormap, colorId):
     print(f"failed with {colorId}")
     return colorId
 
+# remaps a calendar color ID to its natural color
+# for google calendars
 def toNaturalColor(colormap, orgColor):
     for remap in colormap['colors']:
         if remap['api'] == orgColor:
@@ -157,25 +132,31 @@ def toNaturalColor(colormap, orgColor):
     print(f"failed with {orgColor}")
     return orgColor
 
-def colorizeEvents(events, colors):
+# uses the event color id to convert it to a hex color
+# does this for every event in events
+# this is used for Google Calendars
+def colorizeGoogleEvents(events, colors):
     COLORS_FILE = os.path.join(os.path.dirname(__file__), 'colors.json')
     with open(COLORS_FILE) as f:
         colormap = json.load(f)
         
     for event in events:
-        print(event.colorHex, flush=True) 
         if event.eventColorId != None:
             event.colorHex = forEventGetColor(event, colormap, colors)
 
-# this function is only used once for calendar generation stuff
+# returns a color for a specific calendar color id
+# for google calendars
 def fromColorIdGetColor(color, colormap, colors):
     return toNaturalColor(colormap, colors['calendar'][color]['background'])
 
+# generates the natural color for a event color id
+# for google calendars
 def forEventGetColor(event, colormap, colors):
     calColorId = toCalendarColorId(colormap, event.eventColorId)
     bg = colors['calendar'][calColorId]['background']     
     return toNaturalColor(colormap, bg)
 
+# exports all events into a jsonable format (excluding all day events)
 def toJson(events):
     data = {}
     data['kind'] = 'calendar#events'
@@ -195,30 +176,32 @@ def toJson(events):
 
     return data
 
+# debug functions which prints color names
 def printColors(colors):
     for i in range(1, 25):
         col = colors['event'][str(i)]['background']
         print(f"{i}: {col}")
 
 def main():
-    generateJsonFromCalendarEntries()
+    return
 
 
 def getTimeStamps():
 
     # define today and tomorrow
     now = datetime.datetime.now(datetime.timezone.utc).astimezone()
-    today = now.replace(hour=0, minute=0, second = 0).isoformat() 
+    today = now.replace(hour=0, minute=0, second = 0) 
     tomorrow = now.replace(hour=23, minute=59, second=59).isoformat() # + '+01:00'
     twodaysfromnow = datetime.datetime.today() + datetime.timedelta(days=2)
-    twodaysfromnow = twodaysfromnow.replace(hour=23, minute=59, second=59).astimezone().isoformat()
+    twodaysfromnow = twodaysfromnow.replace(hour=23, minute=59, second=59).astimezone()
     
     return today, twodaysfromnow
 
 def generateJsonFromCalendarEntries(events, colors):
     
     # fix all colors in events that have a different event color
-    colorizeEvents(events, colors)
+    if colors != None:
+        colorizeGoogleEvents(events, colors)
     # if not events:
     #    print('No upcoming events found.')
 

icalHandler.py

@@ -0,0 +1,68 @@
+from server import db
+from database.models import Calendar as dbCalendar
+from backend import Event as bEvent
+from ics import Calendar as iCalendar
+import requests
+
+def icalToCalendarDb(url, name, user):
+    try:
+        c = iCalendar(requests.get(url).text)
+    except:
+        return False
+
+
+    c = dbCalendar(calendar_id = url,
+                      calendar_type = 'ical',
+                      name = name,
+                      toggle = "False",
+                      color = "#000000")
+    db.session.add(c)
+    user.calendars.append(c)
+    db.session.commit()
+
+def fetchCalendarEvents(calendars, startDate, endDate):
+
+    all_events = []
+    for calendar in calendars:
+        if calendar.toggle == "True" and calendar.calendar_type == "ical":
+            ical = iCalendar(requests.get(calendar.calendar_id).text)
+            for event in ical.events:
+                event = fitEventToCalendarTimezone(event, ical)
+                name = event.name
+                start = event.begin.format()
+                end = event.end.format()
+
+                newEvent = bEvent(name, start, end)
+               
+
+                if eventWithinStartEnd(startDate, endDate, event):
+                    if not eventAllDay(event):
+                    
+                        print(start, flush=True)
+                        all_events.append(newEvent) 
+
+    return all_events
+
+def fitEventToCalendarTimezone(event, calendar):
+    event.begin = event.begin.to(next(iter(calendar._timezones)))
+    event.end = event.end.to(next(iter(calendar._timezones)))
+    return event
+
+# converts everything to epoch seconds and utc
+# and then checks if at either event start or event end
+# is is within startDate and endDate
+def eventWithinStartEnd(startDate, endDate, event):
+    if((startDate.timestamp() <= event.begin.timestamp and
+       event.begin.timestamp <= endDate.timestamp()) or
+       startDate.timestamp() <= event.end.timestamp and
+       event.end.timestamp <= endDate.timestamp()):
+        return True
+    return False
+
+def eventAllDay(event):
+    beginDay = event.begin.replace(hour=0, minute=0, second=0)
+    endDay = event.end.replace(hour=0, minute=0, second=0)
+    delta = endDay - beginDay
+    if delta.days >= 2:
+        return True
+    return False