1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145

//! This module defines logic to serialize/deserialize problem and routing matrix in pragmatic
//! format from json input and create and write pragmatic solution.
//!

extern crate serde_json;
use serde::{Deserialize, Serialize};
use std::io::BufWriter;
use vrp_core::models::problem::Job as CoreJob;
use vrp_core::models::Problem as CoreProblem;

mod coord_index;
pub(crate) use self::coord_index::CoordIndex;
use hashbrown::HashMap;
use std::fmt;

pub mod problem;
pub mod solution;

/// Represents a location type.
#[derive(Clone, Debug, Deserialize, Serialize)]
#[serde(untagged)]
pub enum Location {
    /// A location type represented by geocoordinate with latitude and longitude.
    Coordinate {
        /// Latitude.
        lat: f64,
        /// Longitude.
        lng: f64,
    },
    /// A location type represented by index reference in routing matrix.
    Reference {
        /// An index in routing matrix.
        index: usize,
    },
}

impl Location {
    /// Creates a new `[Location]` as coordinate.
    pub fn new_coordinate(lat: f64, lng: f64) -> Self {
        Self::Coordinate { lat, lng }
    }

    /// Creates a new `[Location]` as index reference.
    pub fn new_reference(index: usize) -> Self {
        Self::Reference { index }
    }

    /// Returns lat lng if location is coordinate, panics otherwise.
    pub fn to_lat_lng(&self) -> (f64, f64) {
        match self {
            Self::Coordinate { lat, lng } => (*lat, *lng),
            _ => unreachable!("expect coordinate"),
        }
    }
}

impl fmt::Display for Location {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            Location::Coordinate { lat, lng } => write!(f, "lat={}, lng={}", lat, lng),
            Location::Reference { index } => write!(f, "index={}", index),
        }
    }
}

/// A format error.
#[derive(Clone, Debug, Serialize)]
pub struct FormatError {
    /// An error code in registry.
    pub code: String,
    /// A possible error cause.
    pub cause: String,
    /// An action to take in order to recover from error.
    pub action: String,
    /// A details about exception.
    pub details: Option<String>,
}

impl FormatError {
    /// Creates a new instance of `FormatError` action without details.
    pub fn new(code: String, cause: String, action: String) -> Self {
        Self { code, cause, action, details: None }
    }

    /// Creates a new instance of `FormatError` action.
    pub fn new_with_details(code: String, cause: String, action: String, details: String) -> Self {
        Self { code, cause, action, details: Some(details) }
    }

    /// Serializes error into json.
    pub fn to_json(&self) -> String {
        let mut buffer = String::new();
        let writer = unsafe { BufWriter::new(buffer.as_mut_vec()) };
        serde_json::to_writer_pretty(writer, &self).unwrap();

        buffer
    }

    /// Formats multiple format errors into string.
    pub fn format_many(errors: &[Self], separator: &str) -> String {
        errors.iter().map(|err| err.to_string()).collect::<Vec<_>>().join(separator)
    }
}

impl std::fmt::Display for FormatError {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        write!(f, "{}, cause: '{}', action: '{}'.", self.code, self.cause, self.action)
    }
}

const TIME_CONSTRAINT_CODE: i32 = 1;
const DISTANCE_LIMIT_CONSTRAINT_CODE: i32 = 2;
const DURATION_LIMIT_CONSTRAINT_CODE: i32 = 3;
const CAPACITY_CONSTRAINT_CODE: i32 = 4;
const BREAK_CONSTRAINT_CODE: i32 = 5;
const SKILL_CONSTRAINT_CODE: i32 = 6;
const LOCKING_CONSTRAINT_CODE: i32 = 7;
const REACHABLE_CONSTRAINT_CODE: i32 = 8;
const PRIORITY_CONSTRAINT_CODE: i32 = 9;
const AREA_CONSTRAINT_CODE: i32 = 10;
const DISPATCH_CONSTRAINT_CODE: i32 = 11;
const TOUR_SIZE_CONSTRAINT_CODE: i32 = 12;

pub(crate) const UNASSIGNABLE_ROUTE_KEY: i32 = 100;

/// An job id to job index.
pub type JobIndex = HashMap<String, CoreJob>;

/// Gets job index from core problem definition.
pub(crate) fn get_job_index(problem: &CoreProblem) -> &JobIndex {
    problem
        .extras
        .get("job_index")
        .and_then(|s| s.downcast_ref::<JobIndex>())
        .unwrap_or_else(|| panic!("cannot get job index!"))
}

/// Gets coord index from core problem definition.
pub(crate) fn get_coord_index(problem: &CoreProblem) -> &CoordIndex {
    problem
        .extras
        .get("coord_index")
        .and_then(|s| s.downcast_ref::<CoordIndex>())
        .unwrap_or_else(|| panic!("Cannot get coord index!"))
}