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- fixes #27 - provides ical output at /calendar.ics - refactor: use ics and dhtmlx strategy in files
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| import datetime | ||
| import io | ||
| import traceback | ||
| from flask import jsonify | ||
|
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||
| class ConvertToDhtmlx: | ||
| """Convert events to dhtmlx. This conforms to a stratey pattern.""" | ||
|
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| def __init__(self, specification): | ||
| """Create a DHTMLX conversion strategy. | ||
| - timeshift_minutes is the timeshift specified by the calendar | ||
| for dates. | ||
| """ | ||
| self.timeshift = int(specification["timeshift"]) | ||
|
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| def date_to_string(self, date): | ||
| """Convert a date to a string.""" | ||
| # use ISO format | ||
| # see https://docs.dhtmlx.com/scheduler/howtostart_nodejs.html#step4implementingcrud | ||
| # see https://docs.python.org/3/library/datetime.html#datetime.datetime.isoformat | ||
| # see https://docs.python.org/3/library/datetime.html#strftime-and-strptime-behavior | ||
| timezone = datetime.timezone(datetime.timedelta(minutes=-self.timeshift)) | ||
| if isinstance(date, datetime.date) and not isinstance(date, datetime.datetime): | ||
| date = datetime.datetime(date.year, date.month, date.day, tzinfo=timezone) | ||
| elif date.tzinfo is None: | ||
| date = date.replace(tzinfo=timezone) | ||
| date = date.astimezone(datetime.timezone.utc) | ||
| return date.strftime("%Y-%m-%d %H:%M") | ||
|
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| def convert_ical_event(self, calendar_event): | ||
| start = calendar_event["DTSTART"].dt | ||
| end = calendar_event.get("DTEND", calendar_event["DTSTART"]).dt | ||
| geo = calendar_event.get("GEO", None) | ||
| if geo: | ||
| geo = {"lon": geo.longitude, "lat": geo.latitude} | ||
| name = calendar_event.get("SUMMARY", "") | ||
| sequence = str(calendar_event.get("SEQUENCE", 0)) | ||
| uid = calendar_event["UID"] | ||
| start_date = self.date_to_string(start) | ||
| return { | ||
| "start_date": start_date, | ||
| "end_date": self.date_to_string(end), | ||
| "start_date_iso": start.isoformat(), | ||
| "end_date_iso": end.isoformat(), | ||
| "start_date_iso_0": start.isoformat(), | ||
| "end_date_iso_0": end.isoformat(), | ||
| "text": name, | ||
| "description": calendar_event.get("DESCRIPTION", ""), | ||
| "location": calendar_event.get("LOCATION", None), | ||
| "geo": geo, | ||
| "uid": uid, | ||
| "ical": calendar_event.to_ical().decode("UTF-8"), | ||
| "sequence": sequence, | ||
| "recurrence": None, | ||
| "url": calendar_event.get("URL"), | ||
| "id": (uid, start_date), | ||
| "type": "event" | ||
| } | ||
|
|
||
| def error(self, ty, error, tb, url=None): | ||
| """Create an error which can be used by the dhtmlx scheduler.""" | ||
| now = datetime.datetime.now(); | ||
| now_iso = now.isoformat() | ||
| now_s = self.date_to_string(now) | ||
| tb_s = io.StringIO() | ||
| traceback.print_exception(ty, error, tb, file=tb_s) | ||
| return { | ||
| "start_date": now_s, | ||
| "end_date": now_s, | ||
| "start_date_iso": now_iso, | ||
| "end_date_iso": now_iso, | ||
| "start_date_iso_0": now_iso, | ||
| "end_date_iso_0": now_iso, | ||
| "text": type(error).__name__, | ||
| "description": str(error), | ||
| "traceback": tb_s.getvalue(), | ||
| "location": None, | ||
| "geo": None, | ||
| "uid": "error", | ||
| "ical": "", | ||
| "sequence": 0, | ||
| "recurrence": None, | ||
| "url": url, | ||
| "id": id(error), | ||
| "type": "error" | ||
| } | ||
|
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| def merge(self, events): | ||
| return jsonify(events) | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| import datetime | ||
| from icalendar import Event, Calendar | ||
| from icalendar.prop import vDDDTypes | ||
| from flask import Response | ||
| import io | ||
| import traceback | ||
|
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| class ConvertToICS: | ||
| """Convert events to dhtmlx. This conforms to a stratey pattern.""" | ||
|
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| def __init__(self, specification): | ||
| """Create an ICS conversion strategy.""" | ||
| self.title = specification["title"] | ||
|
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| def convert_ical_event(self, calendar_event): | ||
| return calendar_event | ||
|
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| def error(self, ty, error, tb, url=None): | ||
| """Create an error which can be used by the dhtmlx scheduler.""" | ||
| tb_s = io.StringIO() | ||
| traceback.print_exception(ty, error, tb, file=tb_s) | ||
| event = Event() | ||
| event["DTSTART"] = event["DTEND"] = vDDDTypes(datetime.datetime.now()) | ||
| event["SUMMARY"] = type(error).__name__ | ||
| event["DESCRIPTION"] = str(error) + "\n\n" + tb_s.getvalue() | ||
| event["UID"] = "error" + str(id(error)) | ||
| if url: | ||
| event["URL"] = url | ||
| return event | ||
|
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| def create_calendar(self): | ||
| calendar = Calendar() | ||
| calendar["VERSION"] = "2.0" | ||
| calendar["PRODID"] = "open-web-calendar" | ||
| calendar["CALSCALE"] = "GREGORIAN" | ||
| calendar["METHOD"] = "PUBLISH" | ||
| calendar["X-WR-CALNAME"] = self.title | ||
| calendar["X-PROD-SOURCE"] = "https://github.com/niccokunzmann/open-web-calendar/" | ||
| return calendar | ||
|
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| def merge(self, events): | ||
| calendar = self.create_calendar() | ||
| for event in events: | ||
| calendar.add_component(event) | ||
| return Response(calendar.to_ical(), mimetype="text/calendar") | ||
|
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