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#[macro_use]
extern crate combine;
use std::collections::HashMap;
use combine::*;
use combine::parser::choice::or;
use combine::parser::char::{string, string_cmp};
#[derive(Debug, PartialEq)]
pub enum HeadphoneButton {
Play,
Up,
Down,
}
type Trigger = Vec<HeadphoneButton>;
type Action = String;
#[derive(Debug, PartialEq)]
pub enum MapKind {
Map,
Command,
}
pub struct Map {
pub action: Action,
pub kind: MapKind,
}
type MapCollection = HashMap<Trigger, Map>;
pub struct DKMapGroup {
maps: MapCollection,
modes: HashMap<Trigger, MapCollection>,
}
fn map_kind<I>() -> impl Parser<Input = I, Output = MapKind>
where
I: Stream<Item = char>,
I::Error: ParseError<I::Item, I::Range, I::Position>,
{
or(
string("map").map(|_| MapKind::Map),
string("cmd").map(|_| MapKind::Command),
)
}
fn headphone_button<I>() -> impl Parser<Input = I, Output = HeadphoneButton>
where
I: Stream<Item = char>,
I::Error: ParseError<I::Item, I::Range, I::Position>,
{
between(
token('<'),
token('>'),
choice!(
string_cmp("play", |l, r| l.eq_ignore_ascii_case(&r))
.map(|_| HeadphoneButton::Play),
string_cmp("up", |l, r| l.eq_ignore_ascii_case(&r))
.map(|_| HeadphoneButton::Up),
string_cmp("down", |l, r| l.eq_ignore_ascii_case(&r))
.map(|_| HeadphoneButton::Down)
),
)
}
fn trigger<I>() -> impl Parser<Input = I, Output = Trigger>
where
I: Stream<Item = char>,
I::Error: ParseError<I::Item, I::Range, I::Position>,
{
many1(headphone_button())
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn map_kind_parses_kind_map() {
let text = "map";
let result = map_kind().parse(text).map(|t| t.0);
assert_eq!(result, Ok(MapKind::Map));
}
#[test]
fn map_kind_parses_kind_command() {
let text = "cmd";
let result = map_kind().parse(text).map(|t| t.0);
assert_eq!(result, Ok(MapKind::Command));
}
#[test]
fn headphone_button_parses_play() {
let text = "<play>";
let result = headphone_button().parse(text).map(|t| t.0);
assert_eq!(result, Ok(HeadphoneButton::Play));
}
#[test]
fn headphone_button_ignores_case() {
let text = "<Play>";
let result = headphone_button().parse(text).map(|t| t.0);
assert_eq!(result, Ok(HeadphoneButton::Play));
}
#[test]
fn trigger_parses_headphone_button_sequence() {
let text = "<up><down><play>";
let result = trigger().parse(text).map(|t| t.0);
assert_eq!(result, Ok(vec![
HeadphoneButton::Up,
HeadphoneButton::Down,
HeadphoneButton::Play,
]));
}
}
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