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271 lines
7.8 KiB
Rust
271 lines
7.8 KiB
Rust
use crate::config::{Config, Section, Entry, TimeSpan};
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use std::error::Error;
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use std::fmt::{Display, Formatter, Write};
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use std::borrow::{Borrow, BorrowMut};
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#[derive(Debug)]
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struct ParserError {
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filename: String,
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line_no: usize,
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description: String,
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}
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impl Error for ParserError {}
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impl Display for ParserError {
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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), std::fmt::Error> {
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f.write_str(&format!("Config didn't start with section header in file {} at line {}", self.filename, self.line_no))
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}
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}
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pub fn parse_time_span(val: &str) -> Option<TimeSpan> {
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let parse = val.replace(" ", "");
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let mut time_span = TimeSpan::default();
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let mut current_value = String::new();
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let mut current_num = 0usize;
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let finish = &mut |name: &str, amount: usize| {
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match name {
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"nsec" | "ns" => {
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time_span.nanoseconds += amount;
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}
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"usec" | "us" | "µs" => {
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time_span.microseconds += amount;
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}
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"msec" | "ms" => {
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time_span.milliseconds += amount;
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}
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"" | "s" | "sec" | "second" | "seconds" => {
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time_span.seconds += amount;
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}
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"minutes" | "minute" | "min" | "m" => {
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time_span.minutes += amount;
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}
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"hours" | "hour" | "hr" | "h" => {
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time_span.hours += amount;
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}
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"days" | "day" | "d" => {
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time_span.days += amount;
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}
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"weeks" | "week" | "w" => {
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time_span.weeks += amount;
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}
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"M" | "months" | "month" => {
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time_span.months += amount;
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}
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"years" | "year" | "y" => {
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time_span.years += amount;
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}
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_ => return false
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}
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true
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};
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let mut last_is_nr = false;
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for chxr in parse.chars() {
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match chxr.to_ascii_lowercase() {
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'0'..='9' => {
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if !last_is_nr {
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if !finish(current_value.as_str(), current_num) {
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return None;
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}
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current_value = String::new();
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current_num = 0;
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last_is_nr = true
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}
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current_num *= 10;
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current_num += chxr.to_digit(10).unwrap_or(0) as usize
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}
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'a'..='z' => {
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current_value += &chxr.to_string();
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last_is_nr = false;
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}
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_ => {
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return None;
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}
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}
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}
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if !finish(current_value.as_str(), current_num) {
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None
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} else {
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Some(time_span)
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}
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}
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fn parse_config(config: &mut Config, filename: String, contents: String) -> Result<(), ParserError> {
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let file_id = config.add_file(filename.clone());
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let mut current_entry: Option<(&str, String)> = None;
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let mut current_section: Option<&mut Section> = None;
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let mut line_no = 0;
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for line in contents.lines() {
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line_no += 1;
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let line_trimmed = line.trim();
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// We can ignore comments or empty lines
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if line_trimmed == "" || line_trimmed.starts_with("#") || line_trimmed.starts_with(";") {
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continue;
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}
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// Start of group
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if line_trimmed.starts_with('[') {
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if let Some(x) = line_trimmed.rfind(']') {
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let name = &line_trimmed[1..x];
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current_section = Some(
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config
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.sections
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.entry(name.to_string())
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.or_insert_with(|| Section::new(name.to_string()))
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);
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}
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continue;
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}
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if let Some(section) = &mut current_section {
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let (key, value) = if let Some((key, value)) = ¤t_entry {
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(*key, value.clone() + line_trimmed)
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} else {
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let split: Vec<&str> = line_trimmed.splitn(2, "=").collect();
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if split.len() < 2 {
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return Err(ParserError {
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filename,
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line_no,
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description: "Line didn't have Key=Value syntax".to_string(),
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});
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}
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(split.get(0).unwrap().trim(), split.get(1).unwrap().trim().to_string())
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};
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if value.ends_with("\\") {
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let value = value[..value.len() - 1].to_string();
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current_entry = Some((key, value + " "))
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} else {
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section
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.entries
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.entry(key.to_string())
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.or_insert_with(|| Entry::new(key.to_string()))
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.add(&value, file_id)
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}
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} else {
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return Err(ParserError {
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filename,
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line_no,
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description: "Config should start with section header".to_string(),
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});
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}
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}
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Ok(())
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use crate::config::TimeSpan;
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#[test]
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fn test_parse() {
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let mut config = Config::default();
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let res = parse_config(&mut config, "test.unit".to_string(), r"
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[Unit]
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Hello=no
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Hello=
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Hello=Hell
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Hello=World
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Jump=Oh no\
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1336".to_string());
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assert!(res.is_ok());
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assert!(config.sections.get("Unit").is_some());
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let section = config.sections.get("Unit").unwrap();
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let hello_entry = section.entry("Hello").unwrap();
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assert_eq!(hello_entry.get_string(), "World");
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assert_eq!(hello_entry.get_list(), vec!["Hell", "World"]);
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assert_eq!(section.entry("Jump").unwrap().get_string(), "Oh no 1336")
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}
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#[test]
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fn test_config_without_section() {
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let mut config = Config::default();
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let err = parse_config(&mut config, "test.unit".to_string(), r"Hello=World".to_string());
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assert!(err.is_err());
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let err = err.unwrap_err();
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assert_eq!(err.line_no, 1);
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assert_eq!(err.description, "Config should start with section header")
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}
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#[test]
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fn test_booleans() {
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let mut config = Config::default();
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let res = parse_config(&mut config, "test.unit".to_string(), r"
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[Unit]
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1=no
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2=off
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3=0
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4=false
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5=yes
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6=on
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7=1
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8=true
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9=x".to_string());
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assert!(res.is_ok());
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assert!(config.sections.get("Unit").is_some());
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let unit = config.sections.get("Unit").unwrap();
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assert_eq!(unit.get_boolean("1"), Some(false));
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assert_eq!(unit.get_boolean("2"), Some(false));
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assert_eq!(unit.get_boolean("3"), Some(false));
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assert_eq!(unit.get_boolean("4"), Some(false));
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assert_eq!(unit.get_boolean("5"), Some(true));
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assert_eq!(unit.get_boolean("6"), Some(true));
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assert_eq!(unit.get_boolean("7"), Some(true));
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assert_eq!(unit.get_boolean("8"), Some(true));
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assert_eq!(unit.get_boolean("9"), None);
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}
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fn test_time_span() {
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let mut config = Config::default();
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let res = parse_config(&mut config, "test.unit".to_string(), r"
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[Unit]
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1=3 hours
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2=1h
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3=3 M
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4=3m
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5=1M1m
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6=blaat
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".to_string());
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assert!(res.is_ok());
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assert!(config.sections.get("Unit").is_some());
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let unit = config.sections.get("Unit").unwrap();
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assert_eq!(unit.get_time_span("1"), Some(TimeSpan::new().with_hours(3)));
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assert_eq!(unit.get_time_span("2"), Some(TimeSpan::new().with_hours(1)));
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assert_eq!(unit.get_time_span("3"), Some(TimeSpan::new().with_months(3)));
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assert_eq!(unit.get_time_span("4"), Some(TimeSpan::new().with_minutes(3)));
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assert_eq!(unit.get_time_span("5"), Some(TimeSpan::new().with_months(1).with_minutes(1)));
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assert_eq!(unit.get_time_span("6"), None);
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}
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} |