feat(taiko): support shiftjis encoding

taiko-game/Cargo.toml

@@ -43,6 +43,7 @@ tracing-subscriber = { version = "0.3.17", features = ["env-filter", "serde"] }
 rodio = "0.17.3"
 cpal = "0.15.3"
 anyhow = "1.0.82"
+encoding_rs = "0.8.34"
 
 [build-dependencies]
 vergen = { version = "8.3.1", features = [ "build", "git", "gitoxide", "cargo" ]}

taiko-game/src/app.rs

@@ -20,6 +20,7 @@ use tja::{TJACourse, TJAParser, TaikoNote, TaikoNoteType, TaikoNoteVariant, TJA}
 use crate::assets::{DON_WAV, KAT_WAV};
 use crate::cli::AppArgs;
 use crate::sound::{SoundData, SoundPlayer};
+use crate::utils::read_shiftjis_or_utf8;
 use crate::{action::Action, sound, tui};
 
 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -117,7 +118,7 @@ impl App {
 
     async fn enter_course_menu(&mut self) -> Result<()> {
         let selected = self.song_selector.selected().unwrap_or(0);
-        let content = fs::read_to_string(&self.songs[selected].1).unwrap();
+        let content = read_shiftjis_or_utf8(&self.songs[selected].1).unwrap();
         let parser = TJAParser::new();
         let mut song = parser
             .parse(content)

taiko-game/src/sound.rs

@@ -15,7 +15,8 @@ impl SoundData {
     pub fn load_from_path(
         file_path: impl AsRef<Path>,
     ) -> Result<Self, rodio::decoder::DecoderError> {
-        let file = File::open(file_path).expect("Failed to open file");
+        let file = File::open(&file_path)
+            .expect(format!("Failed to open file: {:?}", file_path.as_ref()).as_str());
         Self::load_from_file(file)
     }
 

taiko-game/src/utils.rs

@@ -172,3 +172,16 @@ Config directory: {config_dir_path}
 Data directory: {data_dir_path}"
     )
 }
+
+pub fn read_shiftjis_or_utf8<P: AsRef<std::path::Path>>(path: P) -> Result<String> {
+    let path = path.as_ref();
+    let bytes = std::fs::read(path)?;
+    let encoding = if !encoding_rs::SHIFT_JIS.decode_without_bom_handling(&bytes).1 {
+        encoding_rs::SHIFT_JIS
+    } else {
+        encoding_rs::UTF_8
+    };
+
+    let (cow, _, _) = encoding.decode(&bytes);
+    Ok(cow.into_owned())
+}