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
@@ -81,6 +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)
@@ -96,8 +98,9 @@ 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
 
@@ -110,6 +113,7 @@ def purgeCalendars(calendars, visibleCalendars):
     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:
@@ -119,6 +123,7 @@ def toCalendarColorId(colormap, 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:
@@ -127,8 +132,10 @@ def toNaturalColor(colormap, orgColor):
     print(f"failed with {orgColor}")
     return orgColor
 
-# use the event color id to convert it to a hex color
+# uses the event color id to convert it to a hex color
-def colorizeEvents(events, colors):
+# 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)
@@ -138,10 +145,12 @@ def colorizeEvents(events, colors):
             event.colorHex = forEventGetColor(event, colormap, colors)
 
 # 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']     
@@ -181,17 +190,18 @@ 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