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// icaltool - a tool to get information out of ical/ics files.
// Copyright (C) 2018 Harald Eilertsen <haraldei@anduin.net>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
use ical;
use chrono::{DateTime, TimeZone, Utc};
use regex::RegexBuilder;
use std::fs::File;
use std::io::BufReader;
fn parse_datetime(datetime: Option<String>) -> Option<DateTime<Utc>> {
if let Some(mut dt) = datetime {
if dt.is_empty() {
return None;
}
if !dt.contains('T') {
dt += "T000000";
}
Utc.datetime_from_str(&dt, "%Y%m%dT%H%M%S").ok()
}
else {
None
}
}
fn print_event(event: &ical::parser::ical::component::IcalEvent) {
let mut start: Option<DateTime<Utc>> = None;
let mut end: Option<DateTime<Utc>> = None;
let mut summary = String::new();
for p in &event.properties {
match p.name.as_ref() {
"DTSTART" => start = parse_datetime(p.value.clone()),
"DTEND" => end = parse_datetime(p.value.clone()),
"SUMMARY" => summary = p.value.clone().unwrap_or_default(),
_ => (),
}
}
println!("---> {} - {}: {}",
start.unwrap_or_else(Utc::now),
end.unwrap_or_else(Utc::now),
summary);
}
fn read_icalendar_from_file(filename: &str) -> std::io::Result<Vec<ical::parser::ical::component::IcalCalendar>> {
let buf = BufReader::new(File::open(filename)?);
Ok(ical::IcalParser::new(buf)
.filter_map(|c| c.ok())
.collect())
}
fn match_event(event: &ical::parser::ical::component::IcalEvent, pattern: &str) -> bool {
if pattern == "*" {
true
}
else {
let parts: Vec<&str> = pattern.split(':').collect();
let (key, pat) = (parts[0].to_uppercase(), parts[1]);
let re = RegexBuilder::new(&pat)
.case_insensitive(true)
.build()
.unwrap();
event.properties.iter()
.filter(|ref p| p.name == key && re.is_match(&p.value.clone().unwrap()))
.count() > 0
}
}
#[cfg(test)]
fn test_match_event_helper(pattern: &str) -> Vec<ical::parser::ical::component::IcalEvent> {
let cal = read_icalendar_from_file("test/fixtures/events.ics").unwrap();
cal[0].events.iter()
.filter_map(|event| {
if match_event(&event, pattern) {
Some(event.clone())
}
else {
None
}
})
.collect()
}
#[test]
fn match_all_events() {
let events:Vec<_> = test_match_event_helper("*");
assert_eq!(3, events.len());
}
#[test]
fn match_events_by_summary() {
let events:Vec<_> = test_match_event_helper("summary:All");
assert_eq!(2, events.len());
}
#[test]
fn match_events_by_regex() {
let events:Vec<_> = test_match_event_helper("summary:^All.+1$");
assert_eq!(1, events.len());
}
#[test]
fn match_events_regardless_of_case() {
let events:Vec<_> = test_match_event_helper("summary:^aLl.+1$");
assert_eq!(1, events.len());
}
fn main() {
let mut args = std::env::args().skip(1);
let filename = args.next().unwrap();
let pattern = args.next().unwrap();
let calendars = read_icalendar_from_file(&filename).unwrap();
println!("Found {} calendard in file...", calendars.len());
for c in calendars {
for e in c.events.iter().filter(|e| match_event(&e, &pattern)) {
print_event(&e);
}
}
}
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