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use std::collections::HashMap;
use std::fs::File;
use std::io::{BufReader, BufWriter, Write};
use std::sync::Arc;
use vrp_core::models::{Problem, Solution};
use vrp_pragmatic::format::problem::PragmaticProblem;
use vrp_pragmatic::format::solution::PragmaticSolution;
use vrp_scientific::common::read_init_solution;
use vrp_scientific::lilim::{LilimProblem, LilimSolution};
use vrp_scientific::solomon::{SolomonProblem, SolomonSolution};
use vrp_solver::SolverBuilder;
use super::app::*;
use super::*;
struct ProblemReader(pub Box<dyn Fn(File, Option<Vec<File>>) -> Result<Problem, String>>);
struct InitSolutionReader(pub Box<dyn Fn(File, Arc<Problem>) -> Option<Solution>>);
struct SolutionWriter(
pub Box<
dyn Fn(&Problem, Solution, BufWriter<Box<dyn Write>>, Option<BufWriter<Box<dyn Write>>>) -> Result<(), String>,
>,
);
struct LocationWriter(pub Box<dyn Fn(File, BufWriter<Box<dyn Write>>) -> Result<(), String>>);
fn get_formats<'a>() -> HashMap<&'a str, (ProblemReader, InitSolutionReader, SolutionWriter, LocationWriter)> {
vec![
(
"solomon",
(
ProblemReader(Box::new(|problem: File, matrices: Option<Vec<File>>| {
assert!(matrices.is_none());
BufReader::new(problem).read_solomon()
})),
InitSolutionReader(Box::new(|file, problem| read_init_solution(BufReader::new(file), problem).ok())),
SolutionWriter(Box::new(|_, solution, writer, _| solution.write_solomon(writer))),
LocationWriter(Box::new(|_, _| unimplemented!())),
),
),
(
"lilim",
(
ProblemReader(Box::new(|problem: File, matrices: Option<Vec<File>>| {
assert!(matrices.is_none());
BufReader::new(problem).read_lilim()
})),
InitSolutionReader(Box::new(|_file, _problem| None)),
SolutionWriter(Box::new(|_, solution, writer, _| solution.write_lilim(writer))),
LocationWriter(Box::new(|_, _| unimplemented!())),
),
),
(
"pragmatic",
(
ProblemReader(Box::new(|problem: File, matrices: Option<Vec<File>>| {
if let Some(matrices) = matrices {
let matrices = matrices.into_iter().map(|m| BufReader::new(m)).collect();
(BufReader::new(problem), matrices).read_pragmatic()
} else {
println!("configured to use single approximated routing matrix");
BufReader::new(problem).read_pragmatic()
}
.map_err(|errors| errors.iter().map(|err| err.to_string()).collect::<Vec<_>>().join("\t\n"))
})),
InitSolutionReader(Box::new(|_file, _problem| None)),
SolutionWriter(Box::new(|problem, solution, default_writer, geojson_writer| {
geojson_writer
.map_or(Ok(()), |geojson_writer| solution.write_geo_json(problem, geojson_writer))
.and_then(|_| solution.write_pragmatic_json(problem, default_writer))
})),
LocationWriter(Box::new(|problem, writer| {
let mut writer = writer;
deserialize_problem(BufReader::new(problem))
.map_err(|errors| get_errors_serialized(&errors))
.and_then(|problem| get_locations_serialized(&problem))
.and_then(|locations| writer.write_all(locations.as_bytes()).map_err(|err| err.to_string()))
})),
),
),
]
.into_iter()
.collect()
}
pub fn run_solve(matches: &ArgMatches) {
let formats = get_formats();
let problem_path = matches.value_of(PROBLEM_ARG_NAME).unwrap();
let problem_format = matches.value_of(FORMAT_ARG_NAME).unwrap();
let problem_file = open_file(problem_path, "problem");
let max_generations = matches.value_of(GENERATIONS_ARG_NAME).map(|arg| {
arg.parse::<usize>().unwrap_or_else(|err| {
eprintln!("Cannot get max generations: '{}'", err.to_string());
process::exit(1);
})
});
let max_time = matches.value_of(TIME_ARG_NAME).map(|arg| {
arg.parse::<usize>().unwrap_or_else(|err| {
eprintln!("Cannot get max time: '{}'", err.to_string());
process::exit(1);
})
});
let init_solution = matches.value_of(INIT_SOLUTION_ARG_NAME).map(|path| open_file(path, "init solution"));
let matrix_files = matches
.values_of(MATRIX_ARG_NAME)
.map(|paths: Values| paths.map(|path| open_file(path, "routing matrix")).collect());
let out_result = matches.value_of(OUT_RESULT_ARG_NAME).map(|path| create_file(path, "out solution"));
let out_geojson = matches.value_of(GEO_JSON_ARG_NAME).map(|path| create_file(path, "out geojson"));
let is_get_locations_set = matches.is_present(GET_LOCATIONS_ARG_NAME);
match formats.get(problem_format) {
Some((problem_reader, init_reader, solution_writer, locations_writer)) => {
let out_buffer = create_write_buffer(out_result);
let geo_buffer = out_geojson.map(|geojson| create_write_buffer(Some(geojson)));
if is_get_locations_set {
locations_writer.0(problem_file, out_buffer).unwrap_or_else(|err| {
eprintln!("Cannot get locations '{}'", err);
process::exit(1);
});
} else {
match problem_reader.0(problem_file, matrix_files) {
Ok(problem) => {
let problem = Arc::new(problem);
let solution = init_solution.and_then(|file| init_reader.0(file, problem.clone()));
let solution = SolverBuilder::default()
.with_init_solution(solution.map(|s| (problem.clone(), Arc::new(s))))
.with_max_generations(max_generations)
.with_max_time(max_time)
.build()
.solve(problem.clone());
match solution {
Some(solution) => solution_writer.0(&problem, solution.0, out_buffer, geo_buffer).unwrap(),
None => println!("Cannot find any solution"),
};
}
Err(error) => {
eprintln!("Cannot read {} problem from '{}': '{}'", problem_format, problem_path, error);
process::exit(1);
}
};
}
}
None => {
eprintln!("Unknown format: '{}'", problem_format);
process::exit(1);
}
}
}