make first runnable version

daemon/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "sjnmusicd"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+rusqlite = "0.32"
+rodio = "0.19"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+dirs = "5"

daemon/src/audio.rs

@@ -0,0 +1,37 @@
+use rodio::{Decoder, OutputStream, Sink};
+use std::fs::File;
+use std::io::BufReader;
+
+pub struct AudioEngine {
+    sink: Option<Sink>,
+    _stream: Option<OutputStream>,
+}
+
+impl AudioEngine {
+    pub fn new() -> Self {
+        Self {
+            sink: None,
+            _stream: None,
+        }
+    }
+
+    pub fn play(&mut self, path: &str) {
+        let (_stream, handle) = OutputStream::try_default().unwrap();
+        let sink = Sink::try_new(&handle).unwrap();
+
+        let file = File::open(path).unwrap();
+        let source = Decoder::new(BufReader::new(file)).unwrap();
+
+        sink.append(source);
+
+        self.sink = Some(sink);
+        self._stream = Some(_stream);
+    }
+
+    pub fn is_playing(&self) -> bool {
+        match &self.sink {
+            Some(s) => !s.empty(),
+            None => false,
+        }
+    }
+}

daemon/src/daemon.rs

@@ -0,0 +1,36 @@
+use std::sync::{Arc, Mutex};
+use std::thread;
+
+use crate::{
+    state::DaemonState,
+    socket::start_socket,
+    db::init_db,
+    audio::AudioEngine,
+};
+
+pub fn run() {
+    let state = Arc::new(Mutex::new(DaemonState::new()));
+
+    init_db();
+
+    let socket_state = state.clone();
+    thread::spawn(move || {
+        start_socket(socket_state);
+    });
+
+    let mut audio = AudioEngine::new();
+
+    loop {
+        {
+            let mut state = state.lock().unwrap();
+
+            if !state.queue.is_empty() && !audio.is_playing() {
+                let song = state.queue.remove(0);
+                audio.play(&song.path);
+                state.current = Some(song);
+            }
+        }
+
+        std::thread::sleep(std::time::Duration::from_millis(100));
+    }
+}

daemon/src/db.rs

@@ -0,0 +1,16 @@
+use rusqlite::Connection;
+
+use crate::paths::db_path;
+
+pub fn init_db() {
+    let conn = Connection::open(db_path()).unwrap();
+
+    conn.execute(
+        "CREATE TABLE IF NOT EXISTS songs (
+            id INTEGER PRIMARY KEY,
+            name TEXT UNIQUE,
+            path TEXT
+        )",
+        [],
+    ).unwrap();
+}

daemon/src/main.rs

@@ -0,0 +1,11 @@
+mod daemon;
+mod socket;
+mod protocol;
+mod state;
+mod db;
+mod audio;
+mod paths;
+
+fn main() {
+    daemon::run();
+}

daemon/src/paths.rs

@@ -0,0 +1,36 @@
+use std::path::PathBuf;
+
+pub fn base_dir() -> PathBuf {
+    let mut p = dirs::home_dir().unwrap();
+    p.push(".sjn/music");
+    p
+}
+
+pub fn songs_dir() -> PathBuf {
+    let mut p = base_dir();
+    p.push("songs");
+    p
+}
+
+pub fn song_path(name: &str) -> String {
+    let safe: String = name
+        .chars()
+        .map(|c| {
+            if c.is_alphanumeric() || c == ' ' {
+                c
+            } else {
+                '_'
+            }
+        })
+        .collect();
+
+    let mut p = songs_dir();
+    p.push(format!("{safe}.mp3"));
+    p.to_string_lossy().to_string()
+}
+
+pub fn db_path() -> String {
+    let mut p = base_dir();
+    p.push("songs.db");
+    p.to_string_lossy().to_string()
+}

daemon/src/protocol.rs

@@ -0,0 +1,9 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Debug)]
+pub enum Command {
+    Play(String),
+    Add(String),
+    Del(String),
+    Init(String),
+}

daemon/src/socket.rs

@@ -0,0 +1,42 @@
+use std::io::{Read, Write};
+use std::os::unix::net::UnixListener;
+use std::sync::{Arc, Mutex};
+use std::thread;
+
+use crate::{protocol::Command, state::DaemonState};
+
+pub fn start_socket(state: Arc<Mutex<DaemonState>>) {
+    let _ = std::fs::remove_file("/tmp/sjnmusic.sock");
+
+    let listener = UnixListener::bind("/tmp/sjnmusic.sock").unwrap();
+
+    for stream in listener.incoming() {
+        let state = state.clone();
+
+        thread::spawn(move || {
+            let mut stream = stream.unwrap();
+
+            let mut buf = [0; 2048];
+            let size = stream.read(&mut buf).unwrap();
+
+            let msg = String::from_utf8_lossy(&buf[..size]);
+
+            if let Ok(cmd) = serde_json::from_str::<Command>(&msg) {
+                handle(cmd, state);
+            }
+
+            let _ = stream.write_all(b"OK");
+        });
+    }
+}
+
+fn handle(cmd: Command, state: Arc<Mutex<DaemonState>>) {
+    let mut state = state.lock().unwrap();
+
+    match cmd {
+        Command::Play(song) => state.play(song),
+        Command::Add(song) => state.add(song),
+        Command::Del(song) => state.delete(song),
+        Command::Init(song) => state.init(song),
+    }
+}

daemon/src/state.rs

@@ -0,0 +1,66 @@
+use std::process::Command as SysCommand;
+
+#[derive(Clone)]
+pub struct Song {
+    pub name: String,
+    pub path: String,
+}
+
+pub struct DaemonState {
+    pub queue: Vec<Song>,
+    pub current: Option<Song>,
+}
+
+impl DaemonState {
+    pub fn new() -> Self {
+        Self {
+            queue: Vec::new(),
+            current: None,
+        }
+    }
+
+    pub fn play(&mut self, name: String) {
+        let path = crate::paths::song_path(&name);
+
+        self.queue.insert(0, Song { name, path });
+    }
+
+    pub fn add(&mut self, name: String) {
+        let path = crate::paths::song_path(&name);
+
+        self.queue.push(Song { name, path });
+    }
+
+    pub fn delete(&mut self, name: String) {
+        let path = crate::paths::song_path(&name);
+
+        let _ = std::fs::remove_file(&path);
+
+        self.queue.retain(|s| s.name != name);
+    }
+
+    pub fn init(&mut self, name: String) {
+        let path = crate::paths::song_path(&name);
+
+        let result = SysCommand::new("yt-dlp")
+            .args([
+                "-x",
+                "--audio-format",
+                "mp3",
+                "-o",
+                &path,
+                &format!("ytsearch1:{}", name),
+            ])
+            .output();
+
+        if result.is_err() {
+            eprintln!("INIT failed: yt-dlp not available or download error");
+            return;
+        }
+
+        self.queue.push(Song {
+            name,
+            path,
+        });
+    }
+}