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use chrono::offset::TimeZone;
use chrono::{Duration, Utc};
use rangemap::RangeMap;
fn main() {
let people = ["Alice", "Bob", "Carol"];
let mut roster = RangeMap::new();
// Set up initial roster.
let start_of_roster = Utc.with_ymd_and_hms(2019, 1, 7, 0, 0, 0).unwrap();
let mut week_start = start_of_roster;
for _ in 0..3 {
for person in &people {
let next_week = week_start + Duration::weeks(1);
roster.insert(week_start..next_week, person);
week_start = next_week;
}
}
// Bob is covering Alice's second shift (the fourth shift overall).
let fourth_shift_start = start_of_roster + Duration::weeks(3);
let fourth_shift_end = fourth_shift_start + Duration::weeks(1);
roster.insert(fourth_shift_start..fourth_shift_end, &"Bob");
// Print out the roster, and observe that
// the fourth and fifth shifts have been coalesced
// into one range.
for (range, person) in roster.iter() {
println!("{} ({}): {}", range.start, range.end - range.start, person);
}
}
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