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use crate::format::{CoordIndex, JobIndex};
use crate::parse_time;
use std::iter::once;
use std::sync::Arc;
use vrp_core::models::common::*;
use vrp_core::models::problem::{Job, Single};
use vrp_core::models::solution::{Activity, Place};
use crate::format::solution::Activity as FormatActivity;
use crate::format::solution::Stop as FormatStop;
use crate::format::solution::Tour as FormatTour;
use hashbrown::HashSet;
pub(crate) struct JobInfo(pub Job, pub Arc<Single>, pub Place, pub TimeWindow);
pub(crate) fn try_match_job(
tour: &FormatTour,
stop: &FormatStop,
activity: &FormatActivity,
job_index: &JobIndex,
coord_index: &CoordIndex,
) -> Result<Option<JobInfo>, String> {
let ctx = ActivityContext {
route_start_time: tour
.stops
.first()
.map(|stop| parse_time(&stop.time.departure))
.ok_or_else(|| "empty route".to_owned())?,
location: coord_index
.get_by_loc(activity.location.as_ref().unwrap_or(&stop.location))
.ok_or_else(|| format!("cannot get location for activity for job '{}'", activity.job_id))?,
time: activity
.time
.as_ref()
.map(|time| TimeWindow::new(parse_time(&time.start), parse_time(&time.end)))
.unwrap_or_else(|| TimeWindow::new(parse_time(&stop.time.arrival), parse_time(&stop.time.departure))),
act_type: &activity.activity_type,
job_id: &activity.job_id,
tag: activity.job_tag.as_ref(),
};
match activity.activity_type.as_str() {
"departure" | "arrival" => Ok(None),
"pickup" | "delivery" | "replacement" | "service" => {
let job =
job_index.get(&activity.job_id).ok_or_else(|| format!("unknown job id: '{}'", activity.job_id))?;
let singles: Box<dyn Iterator<Item = &Arc<_>>> = match job {
Job::Single(single) => Box::new(once(single)),
Job::Multi(multi) => {
let tags = multi.jobs.iter().filter_map(|job| get_tag(job).cloned()).collect::<HashSet<_>>();
if tags.len() < multi.jobs.len() {
return Err(format!(
"cannot check multi job without unique tags, check '{}' job",
activity.job_id
));
}
Box::new(multi.jobs.iter())
}
};
let (single, place) = singles
.filter_map(|single| match_place(single, true, &ctx).map(|place| (single, place)))
.next()
.ok_or_else(|| format!("cannot match job '{}'", activity.job_id))?;
Ok(Some(JobInfo(job.clone(), single.clone(), place, ctx.time)))
}
"break" | "dispatch" | "reload" => Ok(Some(
(1..)
.map(|idx| format!("{}_{}_{}_{}", tour.vehicle_id, activity.activity_type, tour.shift_index, idx))
.map(|job_id| job_index.get(&job_id))
.take_while(|job| job.is_some())
.filter_map(|job| job.and_then(|job| job.as_single().map(|s| (job.clone(), s.clone()))))
.filter_map(|(job, single)| {
match_place(&single, false, &ctx).map(|place| JobInfo(job, single, place, ctx.time.clone()))
})
.next()
.ok_or_else(|| format!("cannot match '{}' for '{}'", ctx.act_type, tour.vehicle_id))?,
)),
_ => Err(format!("unknown activity type: {}", activity.activity_type)),
}
}
struct ActivityContext<'a> {
route_start_time: Timestamp,
location: Location,
time: TimeWindow,
act_type: &'a String,
job_id: &'a String,
tag: Option<&'a String>,
}
fn match_place<'a>(single: &Arc<Single>, is_job_activity: bool, activity_ctx: &'a ActivityContext) -> Option<Place> {
let job_id = get_job_id(single);
let is_same_ids = *activity_ctx.job_id == job_id;
let is_same_tags = match (get_tag(single), activity_ctx.tag) {
(Some(job_tag), Some(activity_tag)) => job_tag == activity_tag,
(None, None) => true,
_ => false,
};
match (is_same_tags, is_same_ids, is_job_activity) {
(true, false, true) => None,
(true, true, _) | (true, false, false) => single
.places
.iter()
.find(|place| {
let is_same_location = place.location.map_or(true, |l| l == activity_ctx.location);
let is_proper_time =
place.times.iter().any(|time| time.intersects(activity_ctx.route_start_time, &activity_ctx.time));
is_same_location && is_proper_time
})
.map(|place| {
let time = place
.times
.iter()
.rfind(|time| time.intersects(activity_ctx.route_start_time, &activity_ctx.time))
.unwrap();
let time = match time {
TimeSpan::Window(tw) => tw.clone(),
TimeSpan::Offset(_) => {
TimeWindow::new(activity_ctx.time.end - place.duration, activity_ctx.time.end)
}
};
Place { location: activity_ctx.location, duration: place.duration, time }
}),
_ => None,
}
}
fn get_tag(single: &Single) -> Option<&String> {
single.dimens.get_value::<String>("tag")
}
fn get_job_id(single: &Arc<Single>) -> String {
Activity {
place: Place { location: 0, duration: 0.0, time: TimeWindow::new(0., 0.) },
schedule: Schedule { arrival: 0.0, departure: 0.0 },
job: Some(single.clone()),
}
.retrieve_job()
.unwrap()
.dimens()
.get_id()
.cloned()
.expect("cannot get job id")
}