price_cdr_with_unknown_version/
price_cdr_with_unknown_version.rs

1#![expect(clippy::expect_used, reason = "examples can panic")]
2#![expect(clippy::print_stderr, reason = "examples can log to stderr")]
3
4use ocpi_tariffs::{cdr, json, price, timezone, warning, Version};
5
6fn main() {
7    const CDR_JSON: &str = include_str!("data/cdr_time_and_parking_time.json");
8
9    // First the raw JSON is parsed into a `json::Document` and the OCPI version of the CDR is
10    // guessed. The `guess::CdrVersion` returned from calling `cdr::infer_version` is either certain
11    // or uncertain about the version of the contained `cdr::Versioned` object.
12    let cdr = json::parse_object(CDR_JSON).expect("Unable to parse CDR JSON");
13    let cdr = cdr::infer_version(cdr);
14
15    // The guessed Version can be either certain or uncertain.
16    // If the version is uncertain then fallback to presuming the CDR is v211.
17    let cdr = cdr.certain_or(Version::V211);
18    let cdr = cdr::build_versioned(cdr).ignore_warnings();
19
20    // The timezone can be inferred or found in the CDR, but a versioned CDR is required.
21    let timezone = match timezone::find_or_infer(&cdr) {
22        Ok(tz) => tz,
23        Err(err_set) => {
24            let (error, warnings) = err_set.into_parts();
25            eprintln!("Unable to infer timezone");
26            print_timezone_error(&error);
27            print_timezone_warnings(&warnings);
28            return;
29        }
30    };
31    let (timezone_source, warnings) = timezone.into_parts();
32
33    if !warnings.is_empty() {
34        print_timezone_warnings(&warnings);
35    }
36
37    // We don't care whether the timezone was found or inferred.
38    let timezone = timezone_source.into_timezone();
39
40    let report = match cdr::price(&cdr, price::TariffSource::UseCdr, timezone) {
41        Ok(r) => r,
42        Err(set) => {
43            let (error, warnings) = set.into_parts();
44            print_pricing_error(&error);
45            print_pricing_warnings(&warnings);
46            return;
47        }
48    };
49
50    let (report, warnings) = report.into_parts();
51
52    print_pricing_warnings(&warnings);
53
54    // The various fields of the `price::Report` can be examined or converted to JSON.
55    let price::Report {
56        periods: _,
57        tariff_used: _,
58        tariff_reports: _,
59        timezone: _,
60        billed_energy: _,
61        billed_idle_time: _,
62        total_charging_time: _,
63        billed_charging_time: _,
64        total_cost: _,
65        total_fixed_cost: _,
66        total_time: _,
67        total_charging_time_cost: _,
68        total_energy: _,
69        total_energy_cost: _,
70        total_idle_time: _,
71        total_idle_cost: _,
72    } = report;
73}
74
75/// Print the `timezone::Warning` that halted the example to `stderr`.
76fn print_timezone_error(error: &warning::Error<timezone::Warning>) {
77    eprintln!(
78        "ERR: Unable to find timezone due to error at path `{}`: {}",
79        error.element().path,
80        error.warning()
81    );
82}
83
84/// Print the `timezone::Warning`s to `stderr`.
85fn print_timezone_warnings(warnings: &warning::Set<timezone::Warning>) {
86    if warnings.is_empty() {
87        return;
88    }
89
90    eprintln!(
91        "WARN: {} warnings from the timezone search",
92        warnings.len_warnings()
93    );
94
95    eprintln!(
96        "WARN: {} warnings from the timezone search:\n {}",
97        warnings.len_warnings(),
98        warning::SetWriter::new(warnings)
99    );
100}
101
102/// Print the `price::Warning` that halted the process to `stderr`.
103fn print_pricing_error(error: &warning::Error<price::Warning>) {
104    eprintln!(
105        "ERR: Unable to price CDR due to error at path `{}`: {}",
106        error.element().path,
107        error.warning()
108    );
109}
110
111/// Print the `price::Warning`s to `stderr`.
112fn print_pricing_warnings(warnings: &warning::Set<price::Warning>) {
113    if warnings.is_empty() {
114        return;
115    }
116
117    eprintln!(
118        "WARN: {} warnings from the linting:\n {}",
119        warnings.len_warnings(),
120        warning::SetWriter::new(warnings)
121    );
122}
price_cdr_with_unknown_version/price_cdr_with_unknown_version.rs

price_cdr_with_unknown_version/
price_cdr_with_unknown_version.rs
