40 lines
961 B
Python
40 lines
961 B
Python
from flask import Flask
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import os
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import urllib.request
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from icalendar.cal import Calendar, Component
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app = Flask(__name__)
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@app.route("/")
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def hello():
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url = os.environ.get('URL', None)
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if url is None:
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return ""
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cal_str = urllib.request.urlopen(url).read()
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FILTERED_EVENTS = os.environ.get('COURSES', '').split(',')
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cal = Component.from_ical(cal_str)
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other = Calendar()
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# Copy all properties of calendar
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for k, v in cal.items():
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other.add(k, v)
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# Copy the VTIMEZONE component
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other.add_component(cal.walk('VTIMEZONE')[0])
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# Filter and copy VEVENTs
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for ev in cal.walk('VEVENT'):
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course_code = ev['SUMMARY'].split('-')[1].split('/')[0]
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if course_code not in FILTERED_EVENTS:
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other.add_component(ev)
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return other.to_ical().replace(b'\r\n', b'\n').strip()
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if __name__ == "__main__":
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port = int(os.environ.get('PORT', 5000))
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app.run('0.0.0.0', port)
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