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#[cfg(test)]
#[path = "../../../tests/unit/construction/constraints/area_test.rs"]
mod area_test;
use crate::construction::constraints::*;
use crate::construction::heuristics::{ActivityContext, RouteContext, SolutionContext};
use crate::models::common::Location;
use crate::models::problem::{Actor, Job, Single};
use crate::utils::compare_floats;
use std::cmp::Ordering;
use std::ops::Deref;
use std::slice::Iter;
use std::sync::Arc;
pub struct Area {
pub priority: Option<usize>,
pub outer_shape: Vec<(f64, f64)>,
}
pub type AreaResolver = Arc<dyn Fn(&Actor) -> Option<&Vec<Area>> + Sync + Send>;
pub type LocationResolver = Arc<dyn Fn(Location) -> (f64, f64) + Sync + Send>;
pub struct AreaModule {
constraints: Vec<ConstraintVariant>,
keys: Vec<i32>,
}
impl AreaModule {
pub fn new(area_resolver: AreaResolver, location_resolver: LocationResolver, code: i32) -> Self {
Self {
constraints: vec![
ConstraintVariant::HardRoute(Arc::new(AreaHardRouteConstraint {
area_resolver: area_resolver.clone(),
location_resolver: location_resolver.clone(),
code,
})),
ConstraintVariant::HardActivity(Arc::new(AreaHardActivityConstraint {
area_resolver: area_resolver.clone(),
location_resolver: location_resolver.clone(),
code,
})),
ConstraintVariant::SoftActivity(Arc::new(AreaSoftActivityConstraint {
area_resolver,
location_resolver,
})),
],
keys: vec![],
}
}
}
impl ConstraintModule for AreaModule {
fn accept_insertion(&self, _solution_ctx: &mut SolutionContext, _route_index: usize, _job: &Job) {}
fn accept_route_state(&self, _ctx: &mut RouteContext) {}
fn accept_solution_state(&self, _ctx: &mut SolutionContext) {}
fn state_keys(&self) -> Iter<i32> {
self.keys.iter()
}
fn get_constraints(&self) -> Iter<ConstraintVariant> {
self.constraints.iter()
}
}
struct AreaHardRouteConstraint {
area_resolver: AreaResolver,
location_resolver: LocationResolver,
code: i32,
}
impl HardRouteConstraint for AreaHardRouteConstraint {
fn evaluate_job(&self, _: &SolutionContext, ctx: &RouteContext, job: &Job) -> Option<RouteConstraintViolation> {
if let Some(areas) = self.area_resolver.deref()(&ctx.route.actor) {
let can_serve = match job {
Job::Single(job) => find_allowed_area_for_job(job, areas, &self.location_resolver).is_some(),
Job::Multi(job) => job
.jobs
.iter()
.all(|single| find_allowed_area_for_job(single, areas, &self.location_resolver).is_some()),
};
if !can_serve {
return Some(RouteConstraintViolation { code: self.code });
}
}
None
}
}
struct AreaHardActivityConstraint {
area_resolver: AreaResolver,
location_resolver: LocationResolver,
code: i32,
}
impl HardActivityConstraint for AreaHardActivityConstraint {
fn evaluate_activity(
&self,
route_ctx: &RouteContext,
activity_ctx: &ActivityContext,
) -> Option<ActivityConstraintViolation> {
if let Some(areas) = self.area_resolver.deref()(&route_ctx.route.actor) {
let location = self.location_resolver.deref()(activity_ctx.target.place.location);
let can_serve = areas.iter().any(|area| is_location_in_area(&location, area.outer_shape.as_slice()));
if !can_serve {
let stopped = activity_ctx
.target
.job
.as_ref()
.map_or(false, |job| job.places.iter().filter_map(|place| place.location).count() == 1);
return Some(ActivityConstraintViolation { code: self.code, stopped });
}
}
None
}
}
struct AreaSoftActivityConstraint {
area_resolver: AreaResolver,
location_resolver: LocationResolver,
}
impl SoftActivityConstraint for AreaSoftActivityConstraint {
fn estimate_activity(&self, route_ctx: &RouteContext, activity_ctx: &ActivityContext) -> f64 {
let location = activity_ctx.target.place.location;
self.area_resolver.deref()(&route_ctx.route.actor)
.and_then(|areas| find_allowed_area_for_location(location, areas, &self.location_resolver))
.and_then(|area| area.priority)
.map(|priority| {
let route_cost = route_ctx.get_route_cost();
let penalty = if compare_floats(route_cost, 0.) == Ordering::Equal { 1E9 } else { route_cost * 2. };
(priority - 1) as f64 * penalty
})
.unwrap_or(0.)
}
}
fn find_allowed_area_for_location<'a>(
location: Location,
areas: &'a [Area],
location_resolver: &LocationResolver,
) -> Option<&'a Area> {
let location = location_resolver.deref()(location);
areas.iter().find(|area| is_location_in_area(&location, area.outer_shape.as_slice()))
}
fn find_allowed_area_for_job<'a>(
job: &Single,
areas: &'a [Area],
location_resolver: &LocationResolver,
) -> Option<&'a Area> {
job.places
.iter()
.filter_map(|place| place.location)
.filter_map(|location| find_allowed_area_for_location(location, areas, location_resolver))
.next()
}
fn is_location_in_area(location: &(f64, f64), outer_shape: &[(f64, f64)]) -> bool {
let &(x, y) = location;
let mut is_inside = false;
let mut i = 0;
let mut j = outer_shape.len() - 1;
while i < outer_shape.len() {
let &(ix, iy) = outer_shape.get(i).unwrap();
let &(jx, jy) = outer_shape.get(j).unwrap();
if ((ix > x) != (jx > x)) && (y < (jy - iy) * (x - ix) / (jx - ix) + iy) {
is_inside = !is_inside;
}
j = i;
i += 1;
}
is_inside
}