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use chrono::{Local, Date, Datelike, Duration};
use std::collections::HashMap;
use std::{hash, cmp};
use icalwrap::{IcalVEvent, IcalVCalendar};
use utils::misc;
pub trait Bucketable {
fn get_buckets(&self) -> Result<HashMap<String, Vec<String>>, String>;
fn buckets_for_interval(mut start: Date<Local>, end: Date<Local>) -> Vec<String> {
let mut buckets = Vec::new();
while start.iso_week() <= end.iso_week() {
let bucket = misc::get_bucket_for_date(start);
buckets.push(bucket);
start = start.checked_add_signed(Duration::days(7)).unwrap();
}
buckets
}
}
impl Bucketable for IcalVEvent {
fn get_buckets(&self) -> Result<HashMap<String, Vec<String>>, String> {
let mut result: HashMap<String, Vec<String>> = HashMap::new();
let start_date = self.get_dtstart_date().ok_or_else(|| format!("Invalid DTSTART in {}", self.get_uid()))?;
let mut end_date = self.get_dtend_date().unwrap_or(start_date);
// end-dtimes are non-inclusive
// so in case of date-only events, the last day of the event is dtend-1
if self.is_allday() {
end_date = end_date.pred();
}
let buckets = Self::buckets_for_interval(start_date, end_date);
for bucketid in buckets {
result
.entry(bucketid)
.and_modify(|items| items.push(self.get_khaleesi_line().unwrap()))
.or_insert_with(|| vec!(self.get_khaleesi_line().unwrap()));
}
if self.has_recur() {
for instance in self.get_recur_instances() {
let recur_buckets = instance.get_buckets()?;
result.merge(recur_buckets)
}
}
for vec in result.values_mut() {
vec.dedup()
}
Ok(result)
}
}
impl Bucketable for IcalVCalendar {
fn get_buckets(&self) -> Result<HashMap<String, Vec<String>>, String> {
let mut result: HashMap<String, Vec<String>> = HashMap::new();
for event in self.events_iter() {
let recur_buckets = event.get_buckets()?;
result.merge(recur_buckets);
}
Ok(result)
}
}
pub trait Merge<K>
where K: cmp::Eq + hash::Hash
{
fn merge(&mut self, other: HashMap<K, Vec<String>>);
}
impl<K, S> Merge<K> for HashMap<K, Vec<String>, S>
where K: cmp::Eq + hash::Hash,
S: std::hash::BuildHasher
{
fn merge(&mut self, other: HashMap<K, Vec<String>>) {
for (key, mut lines) in other.into_iter() {
self
.entry(key)
.and_modify(|items| items.append(&mut lines))
.or_insert(lines);
}
}
}
#[test]
fn merge_test() {
let mut map_a: HashMap<&str, Vec<String>> = HashMap::new();
let mut map_b: HashMap<&str, Vec<String>> = HashMap::new();
let key = "key";
map_a.insert(&key, vec!["a".to_string(), "b".to_string()]);
map_b.insert(&key, vec!["c".to_string(), "d".to_string()]);
map_a.merge(map_b);
assert_eq!(map_a.get(&key).unwrap(), &vec!["a".to_string(), "b".to_string(), "c".to_string(), "d".to_string()]);
}
#[test]
fn buckets_multi_day_allday() {
use testdata;
use std::path::PathBuf;
let path = PathBuf::from("test/path");
let cal = IcalVCalendar::from_str(testdata::TEST_EVENT_MULTIDAY_ALLDAY, Some(&path)).unwrap();
let event_buckets = cal.get_principal_event().get_buckets().unwrap();
assert_eq!(2, event_buckets.len());
let mut bucket_names = event_buckets.keys().collect::<Vec<&String>>();
bucket_names.sort_unstable();
assert_eq!(vec!("2007-W26", "2007-W27"), bucket_names);
let cal_buckets = cal.get_buckets().unwrap();
assert_eq!(event_buckets, cal_buckets);
}
#[test]
fn buckets_single_event() {
use testdata;
use std::path::PathBuf;
let path = PathBuf::from("test/path");
let cal = IcalVCalendar::from_str(testdata::TEST_EVENT_ONE_MEETING, Some(&path)).unwrap();
let comp_buckets = cal.get_buckets().unwrap();
assert_eq!(vec!("1997-W13"), comp_buckets.keys().collect::<Vec<&String>>());
}
#[test]
fn buckets_simple_recurring_event() {
use testdata;
use std::path::PathBuf;
let path = PathBuf::from("test/path");
let cal = IcalVCalendar::from_str(testdata::TEST_EVENT_RECUR, Some(&path)).unwrap();
let event = cal.get_principal_event();
let event_buckets = event.get_buckets().unwrap();
let cal_buckets = cal.get_buckets().unwrap();
assert_eq!(event_buckets, cal_buckets);
let mut cal_bucket_names = cal_buckets.keys().collect::<Vec<&String>>();
cal_bucket_names.sort_unstable();
assert_eq!(vec!("2018-W41", "2018-W42", "2018-W43", "2018-W44", "2018-W45", "2018-W46", "2018-W47", "2018-W48", "2018-W49", "2018-W50"), cal_bucket_names);
}
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