bitsy-parser/src/sprite.rs

use crate::{AnimationFrames, Image, Position, mock, from_base36, ToBase36, optional_data_line};

#[derive(Debug, Eq, PartialEq)]
pub struct Sprite {
    pub id: u64,
    pub name: Option<String>,
    pub animation_frames: Vec<Image>,
    pub dialogue_id: Option<String>,
    pub room_id: u64,
    pub position: Position,
}

impl Sprite {
    fn name_line(&self) -> String {
        optional_data_line("NAME", self.name.as_ref())
    }

    fn dialogue_line(&self) -> String {
        optional_data_line("DLG", self.dialogue_id.as_ref())
    }
}

impl From<String> for Sprite {
    fn from(string: String) -> Sprite {
        let mut lines: Vec<&str> = string.lines().collect();

        let id = from_base36(&lines[0].replace("SPR ", ""));
        let mut name = None;
        let mut dialogue_id: Option<String> = None;
        let mut room_id: Option<u64> = None;
        let mut position: Option<Position> = None;

        for _ in 0..3 {
            let last_line = lines.pop().unwrap();

            if last_line.starts_with("NAME") {
                name = Some(last_line.replace("NAME ", "").to_string());
            } else if last_line.starts_with("DLG") {
                dialogue_id = Some(last_line.replace("DLG ", "").to_string());
            } else if last_line.starts_with("POS") {
                let last_line = last_line.replace("POS ", "");
                let room_position: Vec<&str> = last_line.split(' ').collect();
                room_id = Some(from_base36(&room_position[0]));
                position = Some(Position::from(room_position[1].to_string()));
            } else {
                lines.push(last_line);
                break;
            }
        }

        let room_id = room_id.unwrap();
        let position = position.unwrap();

        // todo dedupe
        let animation_frames = lines[1..].join("");
        let animation_frames: Vec<&str> = animation_frames.split("\n>\n").collect();
        let animation_frames: Vec<Image> = animation_frames.iter().map(|&frame| {
            Image::from(frame.to_string())
        }).collect();

        Sprite { id, name, animation_frames, dialogue_id, room_id, position }
    }
}

impl ToString for Sprite {
    #[inline]
    fn to_string(&self) -> String {
        format!(
            "SPR {}\n{}{}{}\nPOS {} {}",
            self.id.to_base36(),
            self.animation_frames.to_string(),
            self.name_line(),
            self.dialogue_line(),
            self.room_id.to_base36(),
            self.position.to_string(),
        )
    }
}

#[test]
fn test_sprite_from_string() {
    let output = Sprite::from(
        include_str!("test-resources/sprite").to_string()
    );

    let expected = mock::sprite();

    assert_eq!(output, expected);
}

#[test]
fn test_sprite_to_string() {
    assert_eq!(mock::sprite().to_string(), include_str!("test-resources/sprite").to_string());
}