90a3f41c2d
This is a monumental release in the development of sterling, culminating in the finalization of the command-line API and a stabilization of sterling's features. Woo-hoo!! Sterling's functionality is very basic: conversion of PHB currencies into user-defined ones, basic arithmetic operations, and converting custom currency amounts to the equivalent amount in PHB copper. It's unlikely that I will be adding any additional features ontop of this set, as it already provides functionality appropriate enough for most usecases. Congrats to me on finally finishing a side-project!
93 lines
2.5 KiB
Rust
93 lines
2.5 KiB
Rust
use std::convert::From;
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use std::error::Error;
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use std::fmt::{self, Display, Formatter};
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use std::fs::File;
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use std::io::{self, BufReader, ErrorKind};
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use serde_yaml;
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use currency::Currency;
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pub fn load_config(filename: &str) -> Result<Vec<Currency>, ConfigError> {
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let config_file = File::open(filename)?;
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let config: Vec<Currency> = serde_yaml::from_reader(BufReader::new(config_file))?;
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Ok(config)
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}
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pub fn parse_currency_config(
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config_result: Result<Vec<Currency>, ConfigError>,
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config_file_path: Option<&str>,
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) -> Result<Vec<Currency>, String> {
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match config_result {
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Ok(values) => Ok(values),
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Err(error) => match error.kind {
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ErrorKind::NotFound => {
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if let Some(file_path) = config_file_path {
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Err(format!(
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"Sterling Error: Can't find configuration file: \"{}\"",
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&file_path
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))
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} else {
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Ok(silver_standard_config())
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}
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}
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_ => Err(format!("Sterling Error: {}", error)),
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},
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}
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}
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pub fn phb_config() -> Vec<Currency> {
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vec![
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Currency::new("platinum", 1000, "p", None, None),
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Currency::new("gold", 100, "g", None, None),
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Currency::new("electrum", 50, "e", None, Some(true)),
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Currency::new("silver", 10, "s", None, None),
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Currency::new("copper", 1, "c", None, None),
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]
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}
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fn silver_standard_config() -> Vec<Currency> {
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vec![
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Currency::new("platinum", 1_000_000, "p", None, None),
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Currency::new("gold", 10_000, "g", None, None),
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Currency::new("silver", 100, "s", None, None),
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Currency::new("copper", 1, "c", None, None),
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]
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}
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#[derive(Debug)]
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pub struct ConfigError {
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desc: String,
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pub kind: ErrorKind,
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}
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impl Display for ConfigError {
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fn fmt(&self, f: &mut Formatter) -> fmt::Result {
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write!(f, "Sterling Error: {}", self.desc)
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}
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}
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impl Error for ConfigError {
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fn description(&self) -> &str {
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&self.desc
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}
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}
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impl From<io::Error> for ConfigError {
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fn from(error: io::Error) -> Self {
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ConfigError {
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desc: error.description().to_owned(),
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kind: error.kind(),
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}
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}
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}
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impl From<serde_yaml::Error> for ConfigError {
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fn from(error: serde_yaml::Error) -> Self {
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ConfigError {
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desc: error.description().to_owned(),
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kind: ErrorKind::Other,
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}
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}
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}
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