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from pyparsing import (
Optional,
oneOf,
Literal,
Word,
printables,
Group,
OneOrMore,
ZeroOrMore,
)
"""
A simple parser for calendar (*.ics) files,
as exported by the Mozilla calendar.
Any suggestions and comments welcome.
Version: 0.1
Copyright: Petri Savolainen <firstname.lastname@iki.fi>
License: Free for any use
"""
# TERMINALS
BEGIN = Literal("BEGIN:").suppress()
END = Literal("END:").suppress()
valstr = printables + "\xe4\xf6\xe5\xd6\xc4\xc5 "
EQ = Literal("=").suppress()
SEMI = Literal(";").suppress()
COLON = Literal(":").suppress()
EVENT = Literal("VEVENT").suppress()
CALENDAR = Literal("VCALENDAR").suppress()
ALARM = Literal("VALARM").suppress()
# TOKENS
CALPROP = oneOf("VERSION PRODID METHOD", asKeyword=True)
ALMPROP = oneOf("TRIGGER", asKeyword=True)
EVTPROP = oneOf(
"""X-MOZILLA-RECUR-DEFAULT-INTERVAL
X-MOZILLA-RECUR-DEFAULT-UNITS
UID DTSTAMP LAST-MODIFIED X RRULE EXDATE""", asKeyword=True
)
valuestr = Word(valstr).setName("valuestr")
propval = valuestr
typeval = valuestr
typename = oneOf("VALUE MEMBER FREQ UNTIL INTERVAL", asKeyword=True)
proptype = Group(SEMI + typename + EQ + typeval).setName("proptype").suppress()
calprop = Group(CALPROP + ZeroOrMore(proptype) + COLON + propval)
almprop = Group(ALMPROP + ZeroOrMore(proptype) + COLON + propval)
evtprop = (
Group(EVTPROP + ZeroOrMore(proptype) + COLON + propval).suppress()
| "CATEGORIES" + COLON + propval.setResultsName("categories")
| "CLASS" + COLON + propval.setResultsName("class")
| "DESCRIPTION" + COLON + propval.setResultsName("description")
| "DTSTART" + proptype + COLON + propval.setResultsName("begin")
| "DTEND" + proptype + COLON + propval.setResultsName("end")
| "LOCATION" + COLON + propval.setResultsName("location")
| "PRIORITY" + COLON + propval.setResultsName("priority")
| "STATUS" + COLON + propval.setResultsName("status")
| "SUMMARY" + COLON + propval.setResultsName("summary")
| "URL" + COLON + propval.setResultsName("url")
).setName("evtprop")
calprops = Group(OneOrMore(calprop)).setName("calprops").suppress()
evtprops = Group(OneOrMore(evtprop))
almprops = Group(OneOrMore(almprop)).setName("almprops").suppress()
alarm = (BEGIN + ALARM + almprops + END + ALARM).setName("alarm")
event = (BEGIN + EVENT + evtprops + Optional(alarm) + END + EVENT).setName("event")
events = Group(OneOrMore(event))
calendar = (BEGIN + CALENDAR + calprops + ZeroOrMore(event) + END + CALENDAR).setName("calendar")
calendars = OneOrMore(calendar)
# PARSE ACTIONS
def gotEvent(s, loc, toks):
for event in toks:
print(event.dump())
event.setParseAction(gotEvent)
# MAIN PROGRAM
if __name__ == "__main__":
calendars.parseFile("mozilla.ics")