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#[cfg(test)]
#[path = "../../../tests/unit/extensions/import/csv_test.rs"]
mod csv_test;
pub use self::actual::read_csv_problem;
#[cfg(feature = "csv-format")]
mod actual {
extern crate csv;
extern crate serde;
use serde::Deserialize;
use std::collections::{HashMap, HashSet};
use std::error::Error;
use std::io::{BufReader, Read};
use std::ops::Deref;
use vrp_pragmatic::format::problem::*;
use vrp_pragmatic::format::{FormatError, Location};
#[derive(Debug, Deserialize)]
#[serde(rename_all = "UPPERCASE")]
struct CsvJob {
id: String,
lat: f64,
lng: f64,
demand: i32,
duration: usize,
tw_start: Option<String>,
tw_end: Option<String>,
}
#[derive(Debug, Deserialize)]
#[serde(rename_all = "UPPERCASE")]
struct CsvVehicle {
id: String,
lat: f64,
lng: f64,
capacity: i32,
tw_start: String,
tw_end: String,
amount: usize,
profile: String,
}
fn read_csv_entries<T, R: Read>(reader: BufReader<R>) -> Result<Vec<T>, Box<dyn Error>>
where
for<'de> T: Deserialize<'de>,
{
let mut reader = csv::Reader::from_reader(reader);
let mut entries = vec![];
for entry in reader.deserialize() {
entries.push(entry?);
}
Ok(entries)
}
fn parse_tw(start: Option<String>, end: Option<String>) -> Option<Vec<String>> {
match (start, end) {
(Some(start), Some(end)) => Some(vec![start, end]),
_ => None,
}
}
fn read_jobs<R: Read>(reader: BufReader<R>) -> Result<Vec<Job>, Box<dyn Error>> {
let get_task = |job: &CsvJob| JobTask {
places: vec![JobPlace {
location: Location::Coordinate { lat: job.lat, lng: job.lng },
duration: job.duration as f64 * 60.,
times: parse_tw(job.tw_start.clone(), job.tw_end.clone()).map(|tw| vec![tw]),
}],
demand: if job.demand != 0 { Some(vec![job.demand.abs()]) } else { None },
tag: None,
order: None,
};
let get_tasks = |jobs: &Vec<&CsvJob>, filter: Box<dyn Fn(&CsvJob) -> bool>| {
let tasks = jobs.iter().filter(|j| filter.deref()(j)).map(|job| get_task(job)).collect::<Vec<_>>();
if tasks.is_empty() {
None
} else {
Some(tasks)
}
};
let jobs = read_csv_entries::<CsvJob, _>(reader)?
.iter()
.fold(HashMap::new(), |mut acc, job| {
acc.entry(&job.id).or_insert_with(Vec::new).push(job);
acc
})
.into_iter()
.map(|(job_id, tasks)| Job {
id: job_id.clone(),
pickups: get_tasks(&tasks, Box::new(|j| j.demand > 0)),
deliveries: get_tasks(&tasks, Box::new(|j| j.demand < 0)),
replacements: None,
services: get_tasks(&tasks, Box::new(|j| j.demand == 0)),
skills: None,
value: None,
})
.collect();
Ok(jobs)
}
fn read_vehicles<R: Read>(reader: BufReader<R>) -> Result<Vec<VehicleType>, Box<dyn Error>> {
let vehicles = read_csv_entries::<CsvVehicle, _>(reader)?
.into_iter()
.map(|vehicle| {
let depot_location = Location::Coordinate { lat: vehicle.lat, lng: vehicle.lng };
VehicleType {
type_id: vehicle.id.clone(),
vehicle_ids: (1..=vehicle.amount).map(|seq| format!("{}_{}", vehicle.profile, seq)).collect(),
profile: VehicleProfile { matrix: vehicle.profile, scale: None },
costs: VehicleCosts { fixed: Some(25.), distance: 0.0002, time: 0.005 },
shifts: vec![VehicleShift {
start: ShiftStart {
earliest: vehicle.tw_start,
latest: None,
location: depot_location.clone(),
},
end: Some(ShiftEnd { earliest: None, latest: vehicle.tw_end, location: depot_location }),
dispatch: None,
breaks: None,
reloads: None,
}],
capacity: vec![vehicle.capacity],
skills: None,
limits: None,
}
})
.collect();
Ok(vehicles)
}
fn create_format_error(entity: &str, error: Box<dyn Error>) -> FormatError {
FormatError::new_with_details(
"E0000".to_string(),
format!("cannot read {}", entity),
format!("check {} definition", entity),
format!("{}", error),
)
}
pub fn read_csv_problem<R1: Read, R2: Read>(
jobs_reader: BufReader<R1>,
vehicles_reader: BufReader<R2>,
) -> Result<Problem, FormatError> {
let jobs = read_jobs(jobs_reader).map_err(|err| create_format_error("jobs", err))?;
let vehicles = read_vehicles(vehicles_reader).map_err(|err| create_format_error("vehicles", err))?;
let matrix_profile_names = vehicles.iter().map(|v| v.profile.matrix.clone()).collect::<HashSet<_>>();
Ok(Problem {
plan: Plan { jobs, relations: None },
fleet: Fleet {
vehicles,
profiles: matrix_profile_names.into_iter().map(|name| MatrixProfile { name, speed: None }).collect(),
},
objectives: None,
})
}
}
#[cfg(not(feature = "csv-format"))]
mod actual {
use std::io::{BufReader, Read};
use vrp_pragmatic::format::problem::Problem;
use vrp_pragmatic::format::FormatError;
pub fn read_csv_problem<R1: Read, R2: Read>(
_jobs_reader: BufReader<R1>,
_vehicles_reader: BufReader<R2>,
) -> Result<Problem, FormatError> {
unreachable!("csv-format feature is not included")
}
}