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use std::collections::HashMap;
use std::str;
use winnow::prelude::*;
use winnow::{
ascii::{alphanumeric1 as alphanumeric, multispace0 as multispace, space0 as space},
combinator::opt,
combinator::repeat,
combinator::{delimited, separated_pair, terminated},
token::take_while,
};
pub type Stream<'i> = &'i [u8];
pub fn categories(i: Stream<'_>) -> IResult<Stream<'_>, HashMap<&str, HashMap<&str, &str>>> {
repeat(
0..,
separated_pair(
category,
opt(multispace),
repeat(0.., terminated(key_value, opt(multispace))),
),
)
.parse_next(i)
}
fn category(i: Stream<'_>) -> IResult<Stream<'_>, &str> {
delimited('[', take_while(0.., |c| c != b']'), ']')
.try_map(str::from_utf8)
.parse_next(i)
}
pub fn key_value(i: Stream<'_>) -> IResult<Stream<'_>, (&str, &str)> {
let (i, key) = alphanumeric.try_map(str::from_utf8).parse_next(i)?;
let (i, _) = (opt(space), '=', opt(space)).parse_next(i)?;
let (i, val) = take_while(0.., |c| c != b'\n' && c != b';')
.try_map(str::from_utf8)
.parse_next(i)?;
let (i, _) = opt((';', take_while(0.., |c| c != b'\n'))).parse_next(i)?;
Ok((i, (key, val)))
}
#[test]
fn parse_category_test() {
let ini_file = &b"[category]
parameter=value
key = value2"[..];
let ini_without_category = &b"\n\nparameter=value
key = value2"[..];
let res = category(ini_file);
println!("{:?}", res);
match res {
Ok((i, o)) => println!("i: {:?} | o: {:?}", str::from_utf8(i), o),
_ => println!("error"),
}
assert_eq!(res, Ok((ini_without_category, "category")));
}
#[test]
fn parse_key_value_test() {
let ini_file = &b"parameter=value
key = value2"[..];
let ini_without_key_value = &b"\nkey = value2"[..];
let res = key_value(ini_file);
println!("{:?}", res);
match res {
Ok((i, (o1, o2))) => println!("i: {:?} | o: ({:?},{:?})", str::from_utf8(i), o1, o2),
_ => println!("error"),
}
assert_eq!(res, Ok((ini_without_key_value, ("parameter", "value"))));
}
#[test]
fn parse_key_value_with_space_test() {
let ini_file = &b"parameter = value
key = value2"[..];
let ini_without_key_value = &b"\nkey = value2"[..];
let res = key_value(ini_file);
println!("{:?}", res);
match res {
Ok((i, (o1, o2))) => println!("i: {:?} | o: ({:?},{:?})", str::from_utf8(i), o1, o2),
_ => println!("error"),
}
assert_eq!(res, Ok((ini_without_key_value, ("parameter", "value"))));
}
#[test]
fn parse_key_value_with_comment_test() {
let ini_file = &b"parameter=value;abc
key = value2"[..];
let ini_without_key_value = &b"\nkey = value2"[..];
let res = key_value(ini_file);
println!("{:?}", res);
match res {
Ok((i, (o1, o2))) => println!("i: {:?} | o: ({:?},{:?})", str::from_utf8(i), o1, o2),
_ => println!("error"),
}
assert_eq!(res, Ok((ini_without_key_value, ("parameter", "value"))));
}
#[test]
fn parse_multiple_categories_test() {
let ini_file = &b"[abcd]
parameter=value;abc
key = value2
[category]
parameter3=value3
key4 = value4
"[..];
let ini_after_parser = &b""[..];
let res = categories(ini_file);
//println!("{:?}", res);
match res {
Ok((i, ref o)) => println!("i: {:?} | o: {:?}", str::from_utf8(i), o),
_ => println!("error"),
}
let mut expected_1: HashMap<&str, &str> = HashMap::new();
expected_1.insert("parameter", "value");
expected_1.insert("key", "value2");
let mut expected_2: HashMap<&str, &str> = HashMap::new();
expected_2.insert("parameter3", "value3");
expected_2.insert("key4", "value4");
let mut expected_h: HashMap<&str, HashMap<&str, &str>> = HashMap::new();
expected_h.insert("abcd", expected_1);
expected_h.insert("category", expected_2);
assert_eq!(res, Ok((ini_after_parser, expected_h)));
}
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