bitsy-parser/src/exit.rs

146 lines
3.7 KiB
Rust

use crate::Position;
use std::fmt;
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum Transition {
None,
FadeToWhite,
FadeToBlack,
Wave,
Tunnel,
SlideUp,
SlideDown,
SlideLeft,
SlideRight,
}
impl Transition {
pub fn from_str(str: &str) -> Result<Transition, crate::Error> {
match str {
"fade_w" => Ok(Transition::FadeToWhite),
"fade_b" => Ok(Transition::FadeToBlack),
"wave" => Ok(Transition::Wave),
"tunnel" => Ok(Transition::Tunnel),
"slide_u" => Ok(Transition::SlideUp),
"slide_d" => Ok(Transition::SlideDown),
"slide_l" => Ok(Transition::SlideLeft),
"slide_r" => Ok(Transition::SlideRight),
_ => Err(crate::Error::Transition),
}
}
}
impl fmt::Display for Transition {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", match &self {
Transition::FadeToWhite => " FX fade_w",
Transition::FadeToBlack => " FX fade_b",
Transition::Wave => " FX wave",
Transition::Tunnel => " FX tunnel",
Transition::SlideUp => " FX slide_u",
Transition::SlideDown => " FX slide_d",
Transition::SlideLeft => " FX slide_l",
Transition::SlideRight => " FX slide_r",
Transition::None => "",
})
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct Exit {
/// destination
pub room_id: String,
/// id
pub position: Position,
pub effect: Transition,
}
impl Exit {
pub fn from_str(s: &str) -> Result<Self, crate::Error> {
let parts: Vec<&str> = s.split_whitespace().collect();
if parts.len() < 2 {
return Err(crate::Error::Exit);
}
let mut parts = parts.iter();
let room_id = parts.next().unwrap().to_string();
let position = Position::from_str(parts.next().unwrap())?;
let effect = if parts.next().is_some() {
Transition::from_str(parts.next().unwrap())?
} else {
Transition::None
};
Ok(Exit { room_id, position, effect })
}
}
impl fmt::Display for Exit {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"{} {}{}",
self.room_id,
self.position.to_string(),
self.effect.to_string()
)
}
}
#[cfg(test)]
mod test {
use crate::{Transition, Exit, Position};
#[test]
fn exit_from_string() {
assert_eq!(
Exit::from_str("a 12,13").unwrap(),
Exit {
room_id: "a".to_string(),
position: Position { x: 12, y: 13 },
effect: Transition::None
}
);
}
#[test]
fn exit_from_string_with_fx() {
assert_eq!(
Exit::from_str("a 12,13 FX slide_u").unwrap(),
Exit {
room_id: "a".to_string(),
position: Position { x: 12, y: 13 },
effect: Transition::SlideUp
}
);
}
#[test]
fn exit_to_string() {
assert_eq!(
Exit {
room_id: "8".to_string(),
position: Position { x: 5, y: 6 },
effect: Transition::None
}.to_string(),
"8 5,6".to_string()
);
}
#[test]
fn exit_to_string_with_fx() {
assert_eq!(
Exit {
room_id: "8".to_string(),
position: Position { x: 5, y: 6 },
effect: Transition::FadeToWhite
}.to_string(),
"8 5,6 FX fade_w".to_string()
);
}
}