generate_cdr_from_tariff/
generate_cdr_from_tariff.rs

1#![expect(clippy::unwrap_used, reason = "examples can panic")]
2#![expect(clippy::print_stdout, reason = "examples can log to stdout")]
3#![expect(clippy::print_stderr, reason = "examples can log to stderr")]
4
5use std::str::FromStr as _;
6
7use chrono::{DateTime, Utc};
8use ocpi_tariffs::{cdr, generate, guess, tariff, warning, Version};
9use rust_decimal::Decimal;
10
11fn main() {
12    const TARIFF_JSON: &str = include_str!(
13        "../test_data/v211/real_world/time_and_parking_time_separate_tariff/tariff.json"
14    );
15
16    let report = tariff::parse_and_report(TARIFF_JSON).unwrap();
17    let guess::Report {
18        unexpected_fields,
19        version,
20    } = report;
21
22    if !unexpected_fields.is_empty() {
23        eprintln!("Strange... there are fields in the tariff that are not defined in the spec.");
24
25        for path in &unexpected_fields {
26            eprintln!("  * {path}");
27        }
28
29        eprintln!();
30    }
31
32    let tariff = version.certain_or(Version::V221);
33
34    let config = generate::Config {
35        timezone: chrono_tz::Europe::Amsterdam,
36        start_date_time: DateTime::<Utc>::from_str("2025-06-12 18:22:33+00:00").unwrap(),
37        end_date_time: DateTime::<Utc>::from_str("2025-06-12 22:33:44+00:00").unwrap(),
38        max_current_supply_amp: Decimal::from(4),
39        max_energy_battery_kwh: Decimal::from(24),
40        max_power_supply_kw: Decimal::from(80),
41    };
42    let report = match cdr::generate_from_tariff(&tariff, config) {
43        Ok(r) => r,
44        Err(set) => {
45            let (error, warnings) = set.into_parts();
46            print_error(&error);
47            print_warnings(&warnings);
48            return;
49        }
50    };
51    let (report, warnings) = report.into_parts();
52
53    print_warnings(&warnings);
54
55    let generate::Report {
56        tariff_id,
57        tariff_currency_code,
58        partial_cdr,
59    } = report;
60
61    println!("CDR genereated for tariff with id: `{tariff_id}` and currency code: `{tariff_currency_code}`");
62    println!("{partial_cdr:#?}");
63}
64
65fn print_error(error: &warning::Error<generate::Warning>) {
66    eprintln!(
67        "ERR: Unable to generate CDR due to error at path `{}`: {}",
68        error.element().path,
69        error.warning()
70    );
71}
72
73fn print_warnings(warnings: &warning::Set<generate::Warning>) {
74    if warnings.is_empty() {
75        return;
76    }
77
78    eprintln!(
79        "WARN: {} warnings from the linting:\n {}",
80        warnings.len_warnings(),
81        warning::SetWriter::new(warnings)
82    );
83}
generate_cdr_from_tariff/generate_cdr_from_tariff.rs

generate_cdr_from_tariff/
generate_cdr_from_tariff.rs
