Refactor to Cargo Workspace (#129)

* Refactor project into a Cargo workspace with distinct packages

- Created a root `Cargo.toml` defining a workspace.
- Moved `src/types` and `src/utils` into a new `pwsp-lib` crate for shared logic.
- Split binaries into their own crates: `pwsp-daemon`, `pwsp-cli`, and `pwsp-gui`.
- Shifted all dependencies into `[workspace.dependencies]` for centralized version management.
- Updated import paths across all crates (e.g. from `pwsp::` to `pwsp_lib::`).
- Updated build scripts, GitHub actions, Flatpak manifest, and AUR PKGBUILD to support the new workspace structure.
- Ensured no core application logic was altered.

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

* Fix cargo-deb build process in GitHub actions for workspace architecture

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

* Fix cargo-deb asset discovery by using exact target/release paths

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

* refactor deps in Cargo.toml files

* fix incorrect assets path

---------

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

pwsp-lib/Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name = "pwsp-lib"
+version.workspace = true
+edition.workspace = true
+authors.workspace = true
+homepage.workspace = true
+repository.workspace = true
+license.workspace = true
+
+[dependencies]
+tokio.workspace = true
+async-trait.workspace = true
+
+serde.workspace = true
+serde_json.workspace = true
+
+dirs.workspace = true
+itertools.workspace = true
+evdev.workspace = true
+anyhow.workspace = true
+rustix.workspace = true
+
+rodio.workspace = true
+pipewire.workspace = true
+
+egui.workspace = true
+
+reqwest.workspace = true

pwsp-lib/src/lib.rs

@@ -0,0 +1,2 @@
+pub mod types;
+pub mod utils;

pwsp-lib/src/types/audio_player.rs

@@ -0,0 +1,491 @@
+use crate::{
+    types::pipewire::{DeviceType, Terminate},
+    utils::{
+        daemon::get_daemon_config,
+        pipewire::{create_link, get_device, link_player_to_virtual_mic},
+    },
+};
+use anyhow::{Result, anyhow};
+use rodio::{Decoder, DeviceSinkBuilder, MixerDeviceSink, Player, Source};
+use serde::{Deserialize, Serialize};
+use std::{
+    collections::HashMap,
+    error::Error,
+    fs,
+    path::{Path, PathBuf},
+    time::Duration,
+};
+
+#[derive(Debug, Eq, PartialEq, Default, Clone, Serialize, Deserialize)]
+pub enum PlayerState {
+    #[default]
+    Stopped,
+    Paused,
+    Playing,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TrackInfo {
+    pub id: u32,
+    pub path: PathBuf,
+    pub duration: Option<f32>,
+    pub position: f32,
+    pub volume: f32,
+    pub looped: bool,
+    pub paused: bool,
+}
+
+#[derive(Default, Debug, Clone, Serialize, Deserialize)]
+pub struct FullState {
+    pub state: PlayerState,
+    pub tracks: Vec<TrackInfo>,
+    pub volume: f32,
+    pub current_input: String,
+    pub all_inputs: HashMap<String, String>,
+}
+
+pub struct PlayingSound {
+    pub id: u32,
+    pub sink: Player,
+    pub path: PathBuf,
+    pub duration: Option<f32>,
+    pub looped: bool,
+    pub volume: f32,
+}
+
+pub struct AudioPlayer {
+    stream_handle: Option<MixerDeviceSink>,
+    pub tracks: HashMap<u32, PlayingSound>,
+    pub next_id: u32,
+
+    input_link_sender: Option<pipewire::channel::Sender<Terminate>>,
+    player_link_sender: Option<pipewire::channel::Sender<Terminate>>,
+    pub input_device_name: Option<String>,
+
+    pub volume: f32, // Master volume
+}
+
+impl AudioPlayer {
+    pub async fn new() -> Result<Self> {
+        let daemon_config = get_daemon_config();
+        let default_volume = daemon_config.default_volume.unwrap_or(1.0);
+
+        let mut audio_player = AudioPlayer {
+            stream_handle: None,
+            tracks: HashMap::new(),
+            next_id: 1,
+
+            input_link_sender: None,
+            player_link_sender: None,
+            input_device_name: daemon_config.default_input_name.clone(),
+
+            volume: default_volume,
+        };
+
+        if audio_player.input_device_name.is_some() {
+            audio_player.link_devices().await?;
+        }
+
+        Ok(audio_player)
+    }
+
+    fn ensure_stream(&mut self) -> Result<&MixerDeviceSink> {
+        if self.stream_handle.is_none() {
+            let mut sink = DeviceSinkBuilder::open_default_sink()?;
+            sink.log_on_drop(false);
+            self.stream_handle = Some(sink);
+        }
+        self.stream_handle
+            .as_ref()
+            .ok_or_else(|| anyhow!("Failed to initialize stream_handle"))
+    }
+
+    fn drop_stream(&mut self) {
+        if self.stream_handle.is_some() {
+            self.stream_handle = None;
+            self.abort_player_link_thread();
+        }
+    }
+
+    fn abort_link_thread(&mut self) {
+        if let Some(sender) = &self.input_link_sender {
+            if sender.send(Terminate {}).is_ok() {
+                println!("Sent terminate signal to input link thread");
+                self.input_link_sender = None;
+            } else {
+                eprintln!("Failed to send terminate signal to input link thread");
+            }
+        }
+    }
+
+    fn abort_player_link_thread(&mut self) {
+        if let Some(sender) = &self.player_link_sender {
+            if sender.send(Terminate {}).is_ok() {
+                println!("Sent terminate signal to player link thread");
+                self.player_link_sender = None;
+            } else {
+                eprintln!("Failed to send terminate signal to player link thread");
+            }
+        }
+    }
+
+    async fn link_player(&mut self) -> Result<()> {
+        if self.player_link_sender.is_some() {
+            return Ok(());
+        }
+
+        match link_player_to_virtual_mic().await {
+            Ok(sender) => {
+                self.player_link_sender = Some(sender);
+                Ok(())
+            }
+            Err(_) => Ok(()),
+        }
+    }
+
+    async fn link_devices(&mut self) -> Result<()> {
+        self.abort_link_thread();
+
+        let input_device;
+        if let Some(input_device_name) = &self.input_device_name {
+            if let Ok(device) = get_device(input_device_name).await {
+                input_device = device;
+            } else {
+                eprintln!(
+                    "Could not find selected input device {}, skipping device linking",
+                    input_device_name
+                );
+                return Ok(());
+            }
+        } else {
+            eprintln!("No input device selected, skipping device linking");
+            return Ok(());
+        }
+
+        let daemon_input;
+        if let Ok(device) = get_device("pwsp-virtual-mic").await {
+            daemon_input = device;
+        } else {
+            eprintln!("Could not find pwsp-virtual-mic device, skipping device linking");
+            return Ok(());
+        }
+
+        let Some(output_fl) = input_device.output_fl.clone() else {
+            eprintln!("Failed to get pwsp-daemon output_fl");
+            return Ok(());
+        };
+        let Some(output_fr) = input_device.output_fr.clone() else {
+            eprintln!("Failed to get pwsp-daemon output_fr");
+            return Ok(());
+        };
+        let Some(input_fl) = daemon_input.input_fl.clone() else {
+            eprintln!("Failed to get pwsp-daemon input_fl");
+            return Ok(());
+        };
+        let Some(input_fr) = daemon_input.input_fr.clone() else {
+            eprintln!("Failed to get pwsp-daemon input_fr");
+            return Ok(());
+        };
+
+        self.input_link_sender = Some(create_link(output_fl, output_fr, input_fl, input_fr)?);
+
+        Ok(())
+    }
+
+    pub fn pause(&mut self, id: Option<u32>) {
+        if let Some(id) = id {
+            if let Some(sound) = self.tracks.get_mut(&id) {
+                sound.sink.pause();
+            }
+        } else {
+            for sound in self.tracks.values_mut() {
+                sound.sink.pause();
+            }
+        }
+    }
+
+    pub fn resume(&mut self, id: Option<u32>) {
+        if let Some(id) = id {
+            if let Some(sound) = self.tracks.get_mut(&id) {
+                sound.sink.play();
+            }
+        } else {
+            for sound in self.tracks.values_mut() {
+                sound.sink.play();
+            }
+        }
+    }
+
+    pub fn stop(&mut self, id: Option<u32>) {
+        if let Some(id) = id {
+            self.tracks.remove(&id);
+        } else {
+            self.tracks.clear();
+        }
+        if self.tracks.is_empty() {
+            self.drop_stream();
+        }
+    }
+
+    pub fn is_paused(&self) -> bool {
+        if self.tracks.is_empty() {
+            return false;
+        }
+        self.tracks.values().all(|s| s.sink.is_paused())
+    }
+
+    pub fn get_state(&self) -> PlayerState {
+        if self.tracks.is_empty() {
+            return PlayerState::Stopped;
+        }
+
+        if self
+            .tracks
+            .values()
+            .any(|s| !s.sink.is_paused() && !s.sink.empty())
+        {
+            return PlayerState::Playing;
+        }
+
+        if self.is_paused() {
+            return PlayerState::Paused;
+        }
+
+        PlayerState::Stopped
+    }
+
+    pub fn get_volume(&mut self, id: Option<u32>) -> Option<f32> {
+        if let Some(id) = id {
+            if let Some(sound) = self.tracks.get_mut(&id) {
+                Some(sound.sink.volume())
+            } else {
+                None
+            }
+        } else {
+            Some(self.volume)
+        }
+    }
+
+    pub fn set_volume(&mut self, volume: f32, id: Option<u32>) {
+        if let Some(id) = id {
+            if let Some(sound) = self.tracks.get_mut(&id) {
+                sound.volume = volume;
+                sound.sink.set_volume(self.volume * volume);
+            }
+        } else {
+            self.volume = volume;
+            for sound in self.tracks.values_mut() {
+                sound.sink.set_volume(self.volume * sound.volume);
+            }
+        }
+    }
+
+    pub fn get_position(&self, id: Option<u32>) -> f32 {
+        if let Some(id) = id {
+            if let Some(sound) = self.tracks.get(&id) {
+                return sound.sink.get_pos().as_secs_f32();
+            }
+        } else if let Some(sound) = self.tracks.values().last() {
+            // Fallback to last added track if no ID
+            return sound.sink.get_pos().as_secs_f32();
+        }
+        0.0
+    }
+
+    pub fn seek(&mut self, position: f32, id: Option<u32>) -> Result<()> {
+        let position = if position < 0.0 { 0.0 } else { position };
+
+        if let Some(id) = id {
+            if let Some(sound) = self.tracks.get_mut(&id) {
+                sound.sink.try_seek(Duration::from_secs_f32(position))?;
+            }
+        } else {
+            // Seek all? Or last? Let's seek all for now if no ID provided
+            for sound in self.tracks.values_mut() {
+                sound.sink.try_seek(Duration::from_secs_f32(position)).ok();
+            }
+        }
+        Ok(())
+    }
+
+    pub fn get_duration(&mut self, id: Option<u32>) -> Result<f32> {
+        if let Some(id) = id {
+            if let Some(sound) = self.tracks.get(&id) {
+                return sound.duration.ok_or(anyhow!("Unknown duration"));
+            }
+        } else if let Some(sound) = self.tracks.values().last() {
+            return sound.duration.ok_or(anyhow!("Unknown duration"));
+        }
+        Err(anyhow!("No track playing"))
+    }
+
+    pub async fn play(&mut self, file_path: &Path, concurrent: bool) -> Result<u32> {
+        let path_buf = file_path.to_path_buf();
+
+        let decoder_result =
+            tokio::task::spawn_blocking(move || -> Result<_, Box<dyn Error + Send + Sync>> {
+                if !path_buf.exists() {
+                    return Err(format!("File does not exist: {}", path_buf.display()).into());
+                }
+
+                let file = fs::File::open(&path_buf)?;
+                let decoder = Decoder::try_from(file)
+                    .map_err(|e| Box::new(e) as Box<dyn Error + Send + Sync>)?;
+                Ok(decoder)
+            })
+            .await?;
+
+        match decoder_result {
+            Ok(source) => {
+                if !concurrent {
+                    self.tracks.clear();
+                }
+
+                self.ensure_stream()?;
+                self.link_player().await.ok();
+
+                let id = self.next_id;
+                self.next_id += 1;
+
+                let duration = source.total_duration().map(|d| d.as_secs_f32());
+
+                let mixer = self
+                    .stream_handle
+                    .as_ref()
+                    .ok_or_else(|| anyhow::anyhow!("stream_handle is unexpectedly missing"))?
+                    .mixer();
+                let sink = Player::connect_new(mixer);
+                sink.set_volume(self.volume); // Default volume is 1.0 * master
+                sink.append(source);
+                sink.play();
+
+                let sound = PlayingSound {
+                    id,
+                    sink,
+                    path: file_path.to_path_buf(),
+                    duration,
+                    looped: false,
+                    volume: 1.0,
+                };
+
+                self.tracks.insert(id, sound);
+
+                Ok(id)
+            }
+            Err(err) => Err(anyhow!(err)),
+        }
+    }
+
+    pub fn set_loop(&mut self, enabled: bool, id: Option<u32>) {
+        if let Some(id) = id {
+            if let Some(sound) = self.tracks.get_mut(&id) {
+                sound.looped = enabled;
+            }
+        } else {
+            // Set loop for all? Or just last?
+            // Let's set for all.
+            for sound in self.tracks.values_mut() {
+                sound.looped = enabled;
+            }
+        }
+    }
+
+    pub fn get_tracks(&self) -> Vec<TrackInfo> {
+        let mut tracks: Vec<_> = self
+            .tracks
+            .values()
+            .map(|sound| TrackInfo {
+                id: sound.id,
+                path: sound.path.clone(),
+                duration: sound.duration,
+                position: sound.sink.get_pos().as_secs_f32(),
+                volume: sound.volume,
+                looped: sound.looped,
+                paused: sound.sink.is_paused(),
+            })
+            .collect();
+        tracks.sort_by_key(|t| t.id);
+        tracks
+    }
+
+    pub async fn update(&mut self, check_devices: bool) {
+        if check_devices {
+            if let Some(input_device_name) = &self.input_device_name {
+                // Unlink devices if selected input device was removed
+                if self.input_link_sender.is_some() && get_device(input_device_name).await.is_err()
+                {
+                    eprintln!(
+                        "Selected input device {} was removed, unlinking devices",
+                        input_device_name
+                    );
+                    self.abort_link_thread();
+                }
+                // Link devices if not linked
+                else if self.input_link_sender.is_none() {
+                    self.link_devices().await.ok();
+                }
+            }
+
+            if self.stream_handle.is_some() && self.player_link_sender.is_none() {
+                self.link_player().await.ok();
+            }
+        }
+
+        // Handle looped sounds
+        let mut restarts = vec![];
+
+        for (id, sound) in &self.tracks {
+            if sound.sink.empty() && sound.looped {
+                restarts.push(*id);
+            }
+        }
+
+        let mut restart_futures = vec![];
+
+        for id in restarts {
+            if let Some(sound) = self.tracks.get(&id) {
+                let path = sound.path.clone();
+                let handle = tokio::task::spawn_blocking(move || {
+                    if let Ok(file) = fs::File::open(&path)
+                        && let Ok(source) = Decoder::try_from(file)
+                    {
+                        return Some((id, source));
+                    }
+                    None
+                });
+                restart_futures.push(handle);
+            }
+        }
+
+        for handle in restart_futures {
+            if let Ok(res) = handle.await
+                && let Some((id, source)) = res
+                && let Some(sound) = self.tracks.get_mut(&id)
+            {
+                sound.sink.append(source);
+                sound.sink.play();
+            }
+        }
+
+        self.tracks
+            .retain(|_, sound| !sound.sink.empty() || sound.looped);
+
+        if self.tracks.is_empty() {
+            self.drop_stream();
+        }
+    }
+
+    pub async fn set_current_input_device(&mut self, name: &str) -> Result<()> {
+        let input_device = get_device(name).await?;
+
+        if input_device.device_type != DeviceType::Input {
+            return Err(anyhow!("Selected device is not an input device"));
+        }
+
+        self.input_device_name = Some(name.to_string());
+
+        self.link_devices().await?;
+
+        Ok(())
+    }
+}

pwsp-lib/src/types/commands.rs

@@ -0,0 +1,725 @@
+use crate::{
+    types::{
+        audio_player::{FullState, PlayerState},
+        config::HotkeyConfig,
+        socket::{Request, Response},
+    },
+    utils::{
+        commands::parse_command,
+        daemon::get_audio_player,
+        pipewire::{get_all_devices, get_device},
+    },
+};
+use async_trait::async_trait;
+use std::{collections::HashMap, path::PathBuf};
+
+#[async_trait]
+pub trait Executable {
+    async fn execute(&self) -> Response;
+}
+
+pub struct PingCommand {}
+
+pub struct KillCommand {}
+
+pub struct PauseCommand {
+    pub id: Option<u32>,
+}
+
+pub struct ResumeCommand {
+    pub id: Option<u32>,
+}
+
+pub struct TogglePauseCommand {
+    pub id: Option<u32>,
+}
+
+pub struct StopCommand {
+    pub id: Option<u32>,
+}
+
+pub struct IsPausedCommand {}
+
+pub struct GetStateCommand {}
+
+pub struct GetVolumeCommand {
+    pub id: Option<u32>,
+}
+
+pub struct SetVolumeCommand {
+    pub volume: Option<f32>,
+    pub id: Option<u32>,
+}
+
+pub struct GetPositionCommand {
+    pub id: Option<u32>,
+}
+
+pub struct SeekCommand {
+    pub position: Option<f32>,
+    pub id: Option<u32>,
+}
+
+pub struct GetDurationCommand {
+    pub id: Option<u32>,
+}
+
+pub struct PlayCommand {
+    pub file_path: Option<PathBuf>,
+    pub concurrent: Option<bool>,
+}
+
+pub struct GetTracksCommand {}
+
+pub struct GetCurrentInputCommand {}
+
+pub struct GetAllInputsCommand {}
+
+pub struct SetCurrentInputCommand {
+    pub name: Option<String>,
+}
+
+pub struct SetLoopCommand {
+    pub enabled: Option<bool>,
+    pub id: Option<u32>,
+}
+
+pub struct ToggleLoopCommand {
+    pub id: Option<u32>,
+}
+
+pub struct GetDaemonVersionCommand {}
+
+pub struct GetFullStateCommand {}
+
+pub struct GetHotkeysCommand {}
+
+pub struct SetHotkeyCommand {
+    pub slot: Option<String>,
+    pub file_path: Option<PathBuf>,
+}
+
+pub struct SetHotkeyActionCommand {
+    pub slot: Option<String>,
+    pub action: Option<Request>,
+}
+
+pub struct SetHotkeyKeyCommand {
+    pub slot: Option<String>,
+    pub key_chord: Option<String>,
+}
+
+pub struct SetHotkeyActionAndKeyCommand {
+    pub slot: Option<String>,
+    pub action: Option<Request>,
+    pub key_chord: Option<String>,
+}
+
+pub struct PlayHotkeyCommand {
+    pub slot: Option<String>,
+}
+
+pub struct ClearHotkeyCommand {
+    pub slot: Option<String>,
+}
+
+pub struct ClearHotkeyKeyCommand {
+    pub slot: Option<String>,
+}
+
+#[async_trait]
+impl Executable for PingCommand {
+    async fn execute(&self) -> Response {
+        Response::new(true, "pong")
+    }
+}
+
+#[async_trait]
+impl Executable for KillCommand {
+    async fn execute(&self) -> Response {
+        Response::new(true, "killed")
+    }
+}
+
+#[async_trait]
+impl Executable for PauseCommand {
+    async fn execute(&self) -> Response {
+        let mut audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        audio_player.pause(self.id);
+        Response::new(true, "Audio was paused")
+    }
+}
+
+#[async_trait]
+impl Executable for ResumeCommand {
+    async fn execute(&self) -> Response {
+        let mut audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        audio_player.resume(self.id);
+        Response::new(true, "Audio was resumed")
+    }
+}
+
+#[async_trait]
+impl Executable for TogglePauseCommand {
+    async fn execute(&self) -> Response {
+        let mut audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+
+        if audio_player.get_state() == PlayerState::Stopped {
+            return Response::new(false, "Audio is not playing");
+        }
+
+        // This logic is a bit tricky with multiple tracks.
+        // If ID is provided, toggle that track.
+        // If not, toggle global pause state?
+        // For now, let's just use pause/resume based on global state if no ID.
+
+        if let Some(id) = self.id {
+            if let Some(track) = audio_player.tracks.get(&id) {
+                if track.sink.is_paused() {
+                    audio_player.resume(Some(id));
+                    Response::new(true, "Audio was resumed")
+                } else {
+                    audio_player.pause(Some(id));
+                    Response::new(true, "Audio was paused")
+                }
+            } else {
+                Response::new(false, "Track not found")
+            }
+        } else {
+            if audio_player.is_paused() {
+                audio_player.resume(None);
+                Response::new(true, "Audio was resumed")
+            } else {
+                audio_player.pause(None);
+                Response::new(true, "Audio was paused")
+            }
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for StopCommand {
+    async fn execute(&self) -> Response {
+        let mut audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        audio_player.stop(self.id);
+        Response::new(true, "Audio was stopped")
+    }
+}
+
+#[async_trait]
+impl Executable for IsPausedCommand {
+    async fn execute(&self) -> Response {
+        let audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        let is_paused = audio_player.is_paused().to_string();
+        Response::new(true, is_paused)
+    }
+}
+
+#[async_trait]
+impl Executable for GetStateCommand {
+    async fn execute(&self) -> Response {
+        let audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        let state = audio_player.get_state();
+        match serde_json::to_string(&state) {
+            Ok(json) => Response::new(true, json),
+            Err(err) => Response::new(false, format!("Failed to serialize state: {}", err)),
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for GetVolumeCommand {
+    async fn execute(&self) -> Response {
+        let mut audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        let volume = audio_player.get_volume(self.id);
+
+        if let Some(volume) = volume {
+            Response::new(true, volume.to_string())
+        } else {
+            Response::new(false, "Failed to get volume")
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for SetVolumeCommand {
+    async fn execute(&self) -> Response {
+        if let Some(volume) = self.volume {
+            let mut audio_player = match get_audio_player().await {
+                Ok(player) => player.lock().await,
+                Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+            };
+            audio_player.set_volume(volume, self.id);
+            Response::new(true, format!("Audio volume was set to {}", volume))
+        } else {
+            Response::new(false, "Invalid volume value")
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for GetPositionCommand {
+    async fn execute(&self) -> Response {
+        let audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        let position = audio_player.get_position(self.id);
+        Response::new(true, position.to_string())
+    }
+}
+
+#[async_trait]
+impl Executable for SeekCommand {
+    async fn execute(&self) -> Response {
+        if let Some(position) = self.position {
+            let mut audio_player = match get_audio_player().await {
+                Ok(player) => player.lock().await,
+                Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+            };
+            match audio_player.seek(position, self.id) {
+                Ok(_) => Response::new(true, format!("Audio position was set to {}", position)),
+                Err(err) => Response::new(false, err.to_string()),
+            }
+        } else {
+            Response::new(false, "Invalid position value")
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for GetDurationCommand {
+    async fn execute(&self) -> Response {
+        let mut audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        match audio_player.get_duration(self.id) {
+            Ok(duration) => Response::new(true, duration.to_string()),
+            Err(err) => Response::new(false, err.to_string()),
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for PlayCommand {
+    async fn execute(&self) -> Response {
+        if let Some(file_path) = &self.file_path {
+            let mut audio_player = match get_audio_player().await {
+                Ok(player) => player.lock().await,
+                Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+            };
+            match audio_player
+                .play(file_path, self.concurrent.unwrap_or(false))
+                .await
+            {
+                Ok(id) => Response::new(true, id.to_string()),
+                Err(err) => Response::new(false, err.to_string()),
+            }
+        } else {
+            Response::new(false, "Invalid file path")
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for GetTracksCommand {
+    async fn execute(&self) -> Response {
+        let audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        let tracks = audio_player.get_tracks();
+        match serde_json::to_string(&tracks) {
+            Ok(json) => Response::new(true, json),
+            Err(err) => Response::new(false, format!("Failed to serialize tracks: {}", err)),
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for GetCurrentInputCommand {
+    async fn execute(&self) -> Response {
+        let audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        if let Some(input_device_name) = &audio_player.input_device_name {
+            if let Ok(input_device) = get_device(input_device_name).await {
+                Response::new(
+                    true,
+                    format!("{} - {}", input_device.name, input_device.nick),
+                )
+            } else {
+                Response::new(false, "Failed to get current input device")
+            }
+        } else {
+            Response::new(false, "No input device selected")
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for GetAllInputsCommand {
+    async fn execute(&self) -> Response {
+        let (input_devices, _output_devices) = match get_all_devices().await {
+            Ok(devices) => devices,
+            Err(err) => return Response::new(false, format!("Failed to get devices: {}", err)),
+        };
+        let mut input_devices_strings = vec![];
+        for device in input_devices {
+            if device.name == "pwsp-virtual-mic" {
+                continue;
+            }
+
+            let string = format!("{} - {}", device.name, device.nick);
+            input_devices_strings.push(string);
+        }
+        let response_message = input_devices_strings.join("; ");
+
+        Response::new(true, response_message)
+    }
+}
+
+#[async_trait]
+impl Executable for SetCurrentInputCommand {
+    async fn execute(&self) -> Response {
+        if let Some(name) = &self.name {
+            let mut audio_player = match get_audio_player().await {
+                Ok(player) => player.lock().await,
+                Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+            };
+            match audio_player.set_current_input_device(name).await {
+                Ok(_) => Response::new(true, "Input device was set"),
+                Err(err) => Response::new(false, err.to_string()),
+            }
+        } else {
+            Response::new(false, "Invalid index value")
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for SetLoopCommand {
+    async fn execute(&self) -> Response {
+        let mut audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+
+        match self.enabled {
+            Some(enabled) => {
+                audio_player.set_loop(enabled, self.id);
+                Response::new(true, format!("Loop was set to {}", enabled))
+            }
+            None => Response::new(false, "Invalid enabled value"),
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for ToggleLoopCommand {
+    async fn execute(&self) -> Response {
+        let mut audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        if let Some(id) = self.id {
+            if let Some(track) = audio_player.tracks.get_mut(&id) {
+                track.looped = !track.looped;
+                Response::new(true, format!("Loop was set to {}", track.looped))
+            } else {
+                Response::new(false, "Track not found")
+            }
+        } else {
+            // Toggle all?
+            for track in audio_player.tracks.values_mut() {
+                track.looped = !track.looped;
+            }
+            Response::new(true, "Loop toggled for all tracks")
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for GetDaemonVersionCommand {
+    async fn execute(&self) -> Response {
+        Response::new(true, env!("CARGO_PKG_VERSION"))
+    }
+}
+
+#[async_trait]
+impl Executable for GetFullStateCommand {
+    async fn execute(&self) -> Response {
+        let (input_devices, _output_devices) = match get_all_devices().await {
+            Ok(devices) => devices,
+            Err(err) => return Response::new(false, format!("Failed to get devices: {}", err)),
+        };
+        let mut all_inputs = HashMap::new();
+        let mut current_input_nick = String::new();
+
+        let audio_player = match get_audio_player().await {
+            Ok(player) => player.lock().await,
+            Err(err) => return Response::new(false, format!("Audio player error: {}", err)),
+        };
+        if let Some(current_input_name) = &audio_player.input_device_name {
+            for device in input_devices {
+                if device.name == "pwsp-virtual-mic" {
+                    continue;
+                }
+                if device.name == *current_input_name {
+                    current_input_nick = format!("{} - {}", device.name, device.nick);
+                }
+
+                all_inputs.insert(device.name, device.nick);
+            }
+        } else {
+            for device in input_devices {
+                if device.name == "pwsp-virtual-mic" {
+                    continue;
+                }
+
+                all_inputs.insert(device.name, device.nick);
+            }
+        }
+
+        let full_state = FullState {
+            state: audio_player.get_state(),
+            tracks: audio_player.get_tracks(),
+            volume: audio_player.volume,
+            current_input: current_input_nick,
+            all_inputs,
+        };
+
+        match serde_json::to_string(&full_state) {
+            Ok(json) => Response::new(true, json),
+            Err(err) => Response::new(false, format!("Failed to serialize full state: {}", err)),
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for GetHotkeysCommand {
+    async fn execute(&self) -> Response {
+        match HotkeyConfig::load() {
+            Ok(config) => match serde_json::to_string(&config) {
+                Ok(json) => Response::new(true, json),
+                Err(err) => Response::new(false, format!("Failed to serialize hotkeys: {}", err)),
+            },
+            Err(err) => Response::new(false, format!("Failed to load hotkeys: {}", err)),
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for SetHotkeyCommand {
+    async fn execute(&self) -> Response {
+        let Some(slot) = &self.slot else {
+            return Response::new(false, "Missing slot name");
+        };
+        let Some(file_path) = &self.file_path else {
+            return Response::new(false, "Missing file path");
+        };
+
+        let mut config = match HotkeyConfig::load() {
+            Ok(c) => c,
+            Err(err) => return Response::new(false, format!("Failed to load hotkeys: {}", err)),
+        };
+
+        config.set_slot(
+            slot.clone(),
+            Request::play(&file_path.to_string_lossy(), false),
+        );
+
+        match config.save() {
+            Ok(_) => Response::new(true, format!("Hotkey slot '{}' set", slot)),
+            Err(err) => Response::new(false, format!("Failed to save hotkeys: {}", err)),
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for SetHotkeyActionCommand {
+    async fn execute(&self) -> Response {
+        let Some(slot) = &self.slot else {
+            return Response::new(false, "Missing slot name");
+        };
+        let Some(action) = &self.action else {
+            return Response::new(false, "Missing or invalid action");
+        };
+
+        let mut config = match HotkeyConfig::load() {
+            Ok(c) => c,
+            Err(err) => return Response::new(false, format!("Failed to load hotkeys: {}", err)),
+        };
+
+        config.set_slot(slot.clone(), action.clone());
+
+        match config.save() {
+            Ok(_) => Response::new(true, format!("Hotkey slot '{}' set", slot)),
+            Err(err) => Response::new(false, format!("Failed to save hotkeys: {}", err)),
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for SetHotkeyKeyCommand {
+    async fn execute(&self) -> Response {
+        let Some(slot) = &self.slot else {
+            return Response::new(false, "Missing slot name");
+        };
+        let Some(key_chord) = &self.key_chord else {
+            return Response::new(false, "Missing key chord");
+        };
+
+        let mut config = match HotkeyConfig::load() {
+            Ok(c) => c,
+            Err(err) => return Response::new(false, format!("Failed to load hotkeys: {}", err)),
+        };
+
+        if !config.set_key_chord(slot, Some(key_chord.clone())) {
+            return Response::new(false, format!("Slot '{}' not found", slot));
+        }
+
+        match config.save() {
+            Ok(_) => Response::new(
+                true,
+                format!("Key chord for slot '{}' set to '{}'", slot, key_chord),
+            ),
+            Err(err) => Response::new(false, format!("Failed to save hotkeys: {}", err)),
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for SetHotkeyActionAndKeyCommand {
+    async fn execute(&self) -> Response {
+        let Some(slot) = &self.slot else {
+            return Response::new(false, "Missing slot name");
+        };
+        let Some(action) = &self.action else {
+            return Response::new(false, "Missing or invalid action");
+        };
+        let Some(key_chord) = &self.key_chord else {
+            return Response::new(false, "Missing key chord");
+        };
+
+        let mut config = match HotkeyConfig::load() {
+            Ok(c) => c,
+            Err(err) => return Response::new(false, format!("Failed to load hotkeys: {}", err)),
+        };
+
+        // Set the action and then the key chord
+        config.set_slot(slot.clone(), action.clone());
+        if !config.set_key_chord(slot, Some(key_chord.clone())) {
+            return Response::new(
+                false,
+                format!("Slot '{}' not found after setting action", slot),
+            );
+        }
+
+        match config.save() {
+            Ok(_) => Response::new(
+                true,
+                format!(
+                    "Hotkey slot '{}' set with action and key chord '{}'",
+                    slot, key_chord
+                ),
+            ),
+            Err(err) => Response::new(false, format!("Failed to save hotkeys: {}", err)),
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for PlayHotkeyCommand {
+    async fn execute(&self) -> Response {
+        let Some(slot) = &self.slot else {
+            return Response::new(false, "Missing slot name");
+        };
+
+        let config = match HotkeyConfig::load() {
+            Ok(c) => c,
+            Err(err) => return Response::new(false, format!("Failed to load hotkeys: {}", err)),
+        };
+
+        let Some(hotkey_slot) = config.find_slot(slot) else {
+            return Response::new(false, format!("Slot '{}' not found", slot));
+        };
+
+        let action = hotkey_slot.action.clone();
+
+        if let Some(cmd) = parse_command(&action) {
+            cmd.execute().await
+        } else {
+            Response::new(false, "Unknown command in hotkey slot")
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for ClearHotkeyCommand {
+    async fn execute(&self) -> Response {
+        let Some(slot) = &self.slot else {
+            return Response::new(false, "Missing slot name");
+        };
+
+        let mut config = match HotkeyConfig::load() {
+            Ok(c) => c,
+            Err(err) => return Response::new(false, format!("Failed to load hotkeys: {}", err)),
+        };
+
+        if config.remove_slot(slot) {
+            match config.save() {
+                Ok(_) => Response::new(true, format!("Hotkey slot '{}' cleared", slot)),
+                Err(err) => Response::new(false, format!("Failed to save hotkeys: {}", err)),
+            }
+        } else {
+            Response::new(false, format!("Slot '{}' not found", slot))
+        }
+    }
+}
+
+#[async_trait]
+impl Executable for ClearHotkeyKeyCommand {
+    async fn execute(&self) -> Response {
+        let Some(slot) = &self.slot else {
+            return Response::new(false, "Missing slot name");
+        };
+
+        let mut config = match HotkeyConfig::load() {
+            Ok(c) => c,
+            Err(err) => return Response::new(false, format!("Failed to load hotkeys: {}", err)),
+        };
+
+        if !config.set_key_chord(slot, None) {
+            return Response::new(false, format!("Slot '{}' not found", slot));
+        }
+
+        match config.save() {
+            Ok(_) => Response::new(true, format!("Key chord for slot '{}' cleared", slot)),
+            Err(err) => Response::new(false, format!("Failed to save hotkeys: {}", err)),
+        }
+    }
+}

pwsp-lib/src/types/config.rs

@@ -0,0 +1,220 @@
+use crate::{
+    types::socket::Request,
+    utils::{config::get_config_path, gui::ensure_pwsp_audio_dir},
+};
+use anyhow::Result;
+use serde::{Deserialize, Serialize};
+use std::{collections::HashMap, fs, path::PathBuf};
+
+#[derive(Default, Clone, Serialize, Deserialize)]
+#[serde(default)]
+pub struct DaemonConfig {
+    pub default_input_name: Option<String>,
+    pub default_volume: Option<f32>,
+}
+
+impl DaemonConfig {
+    pub fn save_to_file(&self) -> Result<()> {
+        let config_path = get_config_path()?.join("daemon.json");
+
+        if let Some(config_dir) = config_path.parent()
+            && !config_path.exists()
+        {
+            fs::create_dir_all(config_dir)?;
+        }
+
+        let config_json = serde_json::to_string_pretty(self)?;
+        fs::write(config_path, config_json.as_bytes())?;
+        Ok(())
+    }
+
+    pub fn load_from_file() -> Result<DaemonConfig> {
+        let config_path = get_config_path()?.join("daemon.json");
+        let bytes = fs::read(config_path)?;
+        match serde_json::from_slice::<DaemonConfig>(&bytes) {
+            Ok(config) => Ok(config),
+            Err(_) => Ok(DaemonConfig::default()),
+        }
+    }
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
+pub enum PreferredTheme {
+    System,
+    Light,
+    Dark,
+}
+
+#[derive(Clone, Serialize, Deserialize)]
+#[serde(default)]
+pub struct GuiConfig {
+    pub scale_factor: f32,
+    pub left_panel_width: f32,
+
+    pub save_volume: bool,
+    pub save_input: bool,
+    pub save_scale_factor: bool,
+    pub pause_on_exit: bool,
+
+    pub dirs: Vec<PathBuf>,
+
+    pub preferred_theme: PreferredTheme,
+}
+
+impl Default for GuiConfig {
+    fn default() -> Self {
+        GuiConfig {
+            scale_factor: 1.0,
+            left_panel_width: 280.0,
+
+            save_volume: false,
+            save_input: false,
+            save_scale_factor: false,
+            pause_on_exit: false,
+
+            dirs: vec![ensure_pwsp_audio_dir()],
+
+            preferred_theme: PreferredTheme::System,
+        }
+    }
+}
+
+impl GuiConfig {
+    pub fn save_to_file(&mut self) -> Result<()> {
+        let config_path = get_config_path()?.join("gui.json");
+
+        if let Some(config_dir) = config_path.parent()
+            && !config_path.exists()
+        {
+            fs::create_dir_all(config_dir)?;
+        }
+
+        // Do not save scale factor if user does not want to
+        if !self.save_scale_factor {
+            self.scale_factor = 1.0;
+        }
+
+        let config_json = serde_json::to_string_pretty(self)?;
+        fs::write(config_path, config_json.as_bytes())?;
+        Ok(())
+    }
+
+    pub fn load_from_file() -> Result<GuiConfig> {
+        let config_path = get_config_path()?.join("gui.json");
+        let bytes = fs::read(config_path)?;
+        match serde_json::from_slice::<GuiConfig>(&bytes) {
+            Ok(config) => Ok(config),
+            Err(_) => Ok(GuiConfig::default()),
+        }
+    }
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct HotkeySlot {
+    pub slot: String,
+    pub action: Request,
+    pub key_chord: Option<String>,
+}
+
+#[derive(Default, Clone, Debug, Serialize, Deserialize)]
+pub struct HotkeyConfig {
+    #[serde(default)]
+    pub slots: Vec<HotkeySlot>,
+}
+
+impl HotkeyConfig {
+    pub fn config_path() -> Result<PathBuf> {
+        Ok(get_config_path()?.join("hotkeys.json"))
+    }
+
+    pub fn load() -> Result<HotkeyConfig> {
+        let path = Self::config_path()?;
+        if !path.exists() {
+            return Ok(HotkeyConfig::default());
+        }
+        let bytes = fs::read(&path)?;
+        match serde_json::from_slice::<HotkeyConfig>(&bytes) {
+            Ok(config) => Ok(config),
+            Err(e) => Err(e.into()),
+        }
+    }
+
+    pub fn save(&self) -> Result<()> {
+        let path = Self::config_path()?;
+        if let Some(dir) = path.parent()
+            && !dir.exists()
+        {
+            fs::create_dir_all(dir)?;
+        }
+        let json = serde_json::to_string_pretty(self)?;
+        fs::write(path, json.as_bytes())?;
+        Ok(())
+    }
+
+    pub fn find_slot(&self, slot: &str) -> Option<&HotkeySlot> {
+        self.slots.iter().find(|s| s.slot == slot)
+    }
+
+    pub fn find_slot_mut(&mut self, slot: &str) -> Option<&mut HotkeySlot> {
+        self.slots.iter_mut().find(|s| s.slot == slot)
+    }
+
+    pub fn set_slot(&mut self, slot: String, action: Request) {
+        if let Some(existing) = self.find_slot_mut(&slot) {
+            existing.action = action;
+        } else {
+            self.slots.push(HotkeySlot {
+                slot,
+                action,
+                key_chord: None,
+            });
+        }
+    }
+
+    pub fn set_key_chord(&mut self, slot: &str, key_chord: Option<String>) -> bool {
+        if let Some(existing) = self.find_slot_mut(slot) {
+            existing.key_chord = key_chord;
+            true
+        } else {
+            false
+        }
+    }
+
+    pub fn remove_slot(&mut self, slot: &str) -> bool {
+        let len = self.slots.len();
+        self.slots.retain(|s| s.slot != slot);
+        self.slots.len() != len
+    }
+
+    /// Returns pairs of slot names that share the same key chord.
+    pub fn find_conflicts(&self) -> Vec<(&str, &str)> {
+        let mut conflicts = vec![];
+        let mut chord_map: HashMap<&str, Vec<&str>> = HashMap::new();
+
+        for s in &self.slots {
+            if let Some(chord) = &s.key_chord {
+                chord_map.entry(chord.as_str()).or_default().push(&s.slot);
+            }
+        }
+
+        for slots in chord_map.values() {
+            if slots.len() > 1 {
+                for i in 0..slots.len() {
+                    for j in (i + 1)..slots.len() {
+                        conflicts.push((slots[i], slots[j]));
+                    }
+                }
+            }
+        }
+
+        conflicts
+    }
+
+    /// Find which slot(s) have the given key chord.
+    pub fn slots_for_chord(&self, chord: &str) -> Vec<&HotkeySlot> {
+        self.slots
+            .iter()
+            .filter(|s| s.key_chord.as_deref() == Some(chord))
+            .collect()
+    }
+}

pwsp-lib/src/types/gui.rs

@@ -0,0 +1,76 @@
+use crate::types::{
+    audio_player::{PlayerState, TrackInfo},
+    config::HotkeyConfig,
+};
+
+use egui::Id;
+
+use std::{
+    collections::{HashMap, HashSet},
+    path::PathBuf,
+    time::Instant,
+};
+
+#[derive(Default, Debug)]
+pub struct TrackUiState {
+    pub position_slider_value: f32,
+    pub volume_slider_value: f32,
+
+    pub position_dragged: bool,
+    pub volume_dragged: bool,
+
+    pub ignore_position_update_until: Option<Instant>,
+    pub ignore_volume_update_until: Option<Instant>,
+}
+
+#[derive(Default, Debug)]
+pub struct AppState {
+    pub search_query: String,
+
+    pub track_ui_states: HashMap<u32, TrackUiState>,
+
+    pub show_settings: bool,
+    pub volume_dragged: bool,
+    pub force_focus_search: bool,
+
+    pub volume_slider_value: f32,
+
+    pub search_field_id: Option<Id>,
+
+    pub ignore_volume_update_until: Option<Instant>,
+
+    pub current_dir: Option<PathBuf>,
+    pub dirs: Vec<PathBuf>,
+    pub dirs_to_remove: HashSet<PathBuf>,
+
+    pub listed_files: HashSet<PathBuf>,
+    pub listed_dirs: HashSet<PathBuf>,
+    pub dir_cache: HashMap<PathBuf, Vec<PathBuf>>,
+
+    pub show_hotkeys: bool,
+    pub hotkey_capture_active: bool,
+
+    pub hotkey_config: HotkeyConfig,
+    pub hotkey_search_query: String,
+
+    pub assigning_hotkey_slot: Option<String>,
+    pub assigning_hotkey_for_file: Option<PathBuf>,
+}
+
+#[derive(Default, Debug, Clone)]
+pub struct AudioPlayerState {
+    pub state: PlayerState,
+    pub new_state: Option<PlayerState>,
+
+    pub tracks: Vec<TrackInfo>,
+
+    pub volume: f32, // Master volume
+
+    pub current_input: String,
+    pub all_inputs: HashMap<String, String>,
+    pub all_inputs_sorted: Vec<(String, String)>,
+
+    pub is_daemon_running: bool,
+
+    pub hotkey_config: Option<HotkeyConfig>,
+}

pwsp-lib/src/types/mod.rs

@@ -0,0 +1,6 @@
+pub mod audio_player;
+pub mod commands;
+pub mod config;
+pub mod gui;
+pub mod pipewire;
+pub mod socket;

pwsp-lib/src/types/pipewire.rs

@@ -0,0 +1,74 @@
+#[derive(Debug)]
+pub struct Terminate {}
+
+#[derive(Debug, Clone, Ord, PartialOrd, Eq, PartialEq)]
+pub struct Port {
+    pub node_id: u32,
+    pub port_id: u32,
+
+    pub name: String,
+}
+
+#[derive(Debug, Clone, Ord, PartialOrd, Eq, PartialEq)]
+pub enum DeviceType {
+    Input,
+    Output,
+}
+
+#[derive(Debug, Clone, Ord, PartialOrd, Eq, PartialEq)]
+pub struct AudioDevice {
+    pub id: u32,
+
+    pub nick: String,
+    pub name: String,
+
+    pub device_type: DeviceType,
+
+    pub input_fl: Option<Port>,
+    pub input_fr: Option<Port>,
+    pub output_fl: Option<Port>,
+    pub output_fr: Option<Port>,
+}
+
+impl AudioDevice {
+    pub fn new(
+        id: u32,
+        nick: Option<&str>,
+        description: Option<&str>,
+        name: Option<&str>,
+        device_type: DeviceType,
+    ) -> Self {
+        Self {
+            id,
+            nick: nick
+                .or(description)
+                .or(name)
+                .unwrap_or_default()
+                .to_string(),
+            name: name.unwrap_or_default().to_string(),
+            device_type,
+            input_fl: None,
+            input_fr: None,
+            output_fl: None,
+            output_fr: None,
+        }
+    }
+
+    pub fn add_port(&mut self, port: Port) {
+        match port.name.as_str() {
+            "input_FL" => self.input_fl = Some(port),
+            "input_FR" => self.input_fr = Some(port),
+            "output_FL" | "capture_FL" => self.output_fl = Some(port),
+            "output_FR" | "capture_FR" => self.output_fr = Some(port),
+            "input_MONO" => {
+                self.input_fl = Some(port.clone());
+                self.input_fr = Some(port);
+            }
+            "output_MONO" | "capture_MONO" => {
+                self.output_fl = Some(port.clone());
+                self.output_fr = Some(port);
+            }
+            _ => {}
+        }
+    }
+}

pwsp-lib/src/types/socket.rs

@@ -0,0 +1,240 @@
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+
+pub const MAX_MESSAGE_SIZE: usize = 128 * 1024;
+
+#[derive(Default, Debug, Clone, Serialize, Deserialize, PartialEq)]
+pub struct Request {
+    pub name: String,
+    pub args: HashMap<String, String>,
+}
+
+impl Request {
+    pub fn new<T: AsRef<str>>(function_name: T, data: Vec<(T, T)>) -> Self {
+        let hashmap_data: HashMap<String, String> = data
+            .into_iter()
+            .map(|(key, value)| (key.as_ref().to_string(), value.as_ref().to_string()))
+            .collect();
+
+        Request {
+            name: function_name.as_ref().to_string(),
+            args: hashmap_data,
+        }
+    }
+
+    pub fn ping() -> Self {
+        Request::new("ping", vec![])
+    }
+
+    pub fn kill() -> Self {
+        Request::new("kill", vec![])
+    }
+
+    pub fn pause(id: Option<u32>) -> Self {
+        let mut args = vec![];
+        let id_str;
+        if let Some(id) = id {
+            id_str = id.to_string();
+            args.push(("id", id_str.as_str()));
+        }
+        Request::new("pause", args)
+    }
+
+    pub fn resume(id: Option<u32>) -> Self {
+        let mut args = vec![];
+        let id_str;
+        if let Some(id) = id {
+            id_str = id.to_string();
+            args.push(("id", id_str.as_str()));
+        }
+        Request::new("resume", args)
+    }
+
+    pub fn toggle_pause(id: Option<u32>) -> Self {
+        let mut args = vec![];
+        let id_str;
+        if let Some(id) = id {
+            id_str = id.to_string();
+            args.push(("id", id_str.as_str()));
+        }
+        Request::new("toggle_pause", args)
+    }
+
+    pub fn stop(id: Option<u32>) -> Self {
+        let mut args = vec![];
+        let id_str;
+        if let Some(id) = id {
+            id_str = id.to_string();
+            args.push(("id", id_str.as_str()));
+        }
+        Request::new("stop", args)
+    }
+
+    pub fn play(file_path: &str, concurrent: bool) -> Self {
+        Request::new(
+            "play",
+            vec![
+                ("file_path", file_path),
+                ("concurrent", &concurrent.to_string()),
+            ],
+        )
+    }
+
+    pub fn get_is_paused() -> Self {
+        Request::new("is_paused", vec![])
+    }
+
+    pub fn get_volume(id: Option<u32>) -> Self {
+        let mut args = vec![];
+        let id_str;
+        if let Some(id) = id {
+            id_str = id.to_string();
+            args.push(("id", id_str.as_str()));
+        }
+        Request::new("get_volume", args)
+    }
+
+    pub fn get_position(id: Option<u32>) -> Self {
+        let mut args = vec![];
+        let id_str;
+        if let Some(id) = id {
+            id_str = id.to_string();
+            args.push(("id", id_str.as_str()));
+        }
+        Request::new("get_position", args)
+    }
+
+    pub fn get_duration(id: Option<u32>) -> Self {
+        let mut args = vec![];
+        let id_str;
+        if let Some(id) = id {
+            id_str = id.to_string();
+            args.push(("id", id_str.as_str()));
+        }
+        Request::new("get_duration", args)
+    }
+
+    pub fn get_state() -> Self {
+        Request::new("get_state", vec![])
+    }
+
+    pub fn get_tracks() -> Self {
+        Request::new("get_tracks", vec![])
+    }
+
+    pub fn get_input() -> Self {
+        Request::new("get_input", vec![])
+    }
+
+    pub fn get_inputs() -> Self {
+        Request::new("get_inputs", vec![])
+    }
+
+    pub fn set_volume(volume: f32, id: Option<u32>) -> Self {
+        let mut args = vec![("volume".to_string(), volume.to_string())];
+        if let Some(id) = id {
+            args.push(("id".to_string(), id.to_string()));
+        }
+        Request::new("set_volume".to_string(), args)
+    }
+
+    pub fn seek(position: f32, id: Option<u32>) -> Self {
+        let mut args = vec![("position".to_string(), position.to_string())];
+        if let Some(id) = id {
+            args.push(("id".to_string(), id.to_string()));
+        }
+        Request::new("seek".to_string(), args)
+    }
+
+    pub fn set_input(name: &str) -> Self {
+        Request::new("set_input", vec![("input_name", name)])
+    }
+
+    pub fn set_loop(enabled: &str, id: Option<u32>) -> Self {
+        let mut args = vec![("enabled".to_string(), enabled.to_string())];
+        if let Some(id) = id {
+            args.push(("id".to_string(), id.to_string()));
+        }
+        Request::new("set_loop".to_string(), args)
+    }
+
+    pub fn toggle_loop(id: Option<u32>) -> Self {
+        let mut args = vec![];
+        let id_str;
+        if let Some(id) = id {
+            id_str = id.to_string();
+            args.push(("id", id_str.as_str()));
+        }
+        Request::new("toggle_loop", args)
+    }
+
+    pub fn get_daemon_version() -> Self {
+        Request::new("get_daemon_version", vec![])
+    }
+
+    pub fn get_full_state() -> Self {
+        Request::new("get_full_state", vec![])
+    }
+
+    pub fn get_hotkeys() -> Self {
+        Request::new("get_hotkeys", vec![])
+    }
+
+    pub fn set_hotkey(slot: &str, file_path: &str) -> Self {
+        Request::new("set_hotkey", vec![("slot", slot), ("file_path", file_path)])
+    }
+
+    pub fn set_hotkey_key(slot: &str, key_chord: &str) -> Self {
+        Request::new(
+            "set_hotkey_key",
+            vec![("slot", slot), ("key_chord", key_chord)],
+        )
+    }
+
+    pub fn clear_hotkey(slot: &str) -> Self {
+        Request::new("clear_hotkey", vec![("slot", slot)])
+    }
+
+    pub fn play_hotkey(slot: &str) -> Self {
+        Request::new("play_hotkey", vec![("slot", slot)])
+    }
+
+    pub fn set_hotkey_action(slot: &str, action: &Request) -> Self {
+        let action_json = serde_json::to_string(action).unwrap_or_default();
+        Request::new(
+            "set_hotkey_action",
+            vec![("slot", slot), ("action", &action_json)],
+        )
+    }
+
+    pub fn clear_hotkey_key(slot: &str) -> Self {
+        Request::new("clear_hotkey_key", vec![("slot", slot)])
+    }
+
+    pub fn set_hotkey_action_and_key(slot: &str, action: &Request, key_chord: &str) -> Self {
+        let action_json = serde_json::to_string(action).unwrap_or_default();
+        Request::new(
+            "set_hotkey_action_and_key",
+            vec![
+                ("slot", slot),
+                ("action", &action_json),
+                ("key_chord", key_chord),
+            ],
+        )
+    }
+}
+
+#[derive(Default, Debug, Clone, Serialize, Deserialize)]
+pub struct Response {
+    pub status: bool,
+    pub message: String,
+}
+
+impl Response {
+    pub fn new<T: AsRef<str>>(status: bool, message: T) -> Self {
+        Response {
+            status,
+            message: message.as_ref().to_string(),
+        }
+    }
+}

pwsp-lib/src/utils/commands.rs

@@ -0,0 +1,209 @@
+use crate::types::{commands::*, socket::Request};
+
+use std::path::PathBuf;
+
+pub fn parse_command(request: &Request) -> Option<Box<dyn Executable + Send>> {
+    let id = request.args.get("id").and_then(|s| s.parse::<u32>().ok());
+
+    match request.name.as_str() {
+        "ping" => Some(Box::new(PingCommand {})),
+        "kill" => Some(Box::new(KillCommand {})),
+        "pause" => Some(Box::new(PauseCommand { id })),
+        "resume" => Some(Box::new(ResumeCommand { id })),
+        "toggle_pause" => Some(Box::new(TogglePauseCommand { id })),
+        "stop" => Some(Box::new(StopCommand { id })),
+        "is_paused" => Some(Box::new(IsPausedCommand {})),
+        "get_state" => Some(Box::new(GetStateCommand {})),
+        "get_volume" => Some(Box::new(GetVolumeCommand { id })),
+        "set_volume" => {
+            let volume = request
+                .args
+                .get("volume")
+                .unwrap_or(&String::new())
+                .parse::<f32>()
+                .ok();
+            Some(Box::new(SetVolumeCommand { volume, id }))
+        }
+        "get_position" => Some(Box::new(GetPositionCommand { id })),
+        "seek" => {
+            let position = request
+                .args
+                .get("position")
+                .unwrap_or(&String::new())
+                .parse::<f32>()
+                .ok();
+            Some(Box::new(SeekCommand { position, id }))
+        }
+        "get_duration" => Some(Box::new(GetDurationCommand { id })),
+        "play" => {
+            let file_path = request
+                .args
+                .get("file_path")
+                .unwrap_or(&String::new())
+                .parse::<PathBuf>()
+                .ok();
+            let concurrent = request
+                .args
+                .get("concurrent")
+                .unwrap_or(&String::new())
+                .parse::<bool>()
+                .ok();
+            Some(Box::new(PlayCommand {
+                file_path,
+                concurrent,
+            }))
+        }
+        "get_tracks" => Some(Box::new(GetTracksCommand {})),
+        "get_input" => Some(Box::new(GetCurrentInputCommand {})),
+        "get_inputs" => Some(Box::new(GetAllInputsCommand {})),
+        "set_input" => {
+            let name = Some(request.args.get("input_name").unwrap_or(&String::new())).cloned();
+            Some(Box::new(SetCurrentInputCommand { name }))
+        }
+        "set_loop" => {
+            let enabled = request
+                .args
+                .get("enabled")
+                .unwrap_or(&String::new())
+                .parse::<bool>()
+                .ok();
+            Some(Box::new(SetLoopCommand { enabled, id }))
+        }
+        "toggle_loop" => Some(Box::new(ToggleLoopCommand { id })),
+        "get_daemon_version" => Some(Box::new(GetDaemonVersionCommand {})),
+        "get_full_state" => Some(Box::new(GetFullStateCommand {})),
+        "get_hotkeys" => Some(Box::new(GetHotkeysCommand {})),
+        "set_hotkey" => {
+            let slot = request.args.get("slot").cloned();
+            let file_path = request
+                .args
+                .get("file_path")
+                .and_then(|s| s.parse::<PathBuf>().ok());
+            Some(Box::new(SetHotkeyCommand { slot, file_path }))
+        }
+        "set_hotkey_key" => {
+            let slot = request.args.get("slot").cloned();
+            let key_chord = request.args.get("key_chord").cloned();
+            Some(Box::new(SetHotkeyKeyCommand { slot, key_chord }))
+        }
+        "clear_hotkey" => {
+            let slot = request.args.get("slot").cloned();
+            Some(Box::new(ClearHotkeyCommand { slot }))
+        }
+        "play_hotkey" => {
+            let slot = request.args.get("slot").cloned();
+            Some(Box::new(PlayHotkeyCommand { slot }))
+        }
+        "set_hotkey_action" => {
+            let slot = request.args.get("slot").cloned();
+            let action = request
+                .args
+                .get("action")
+                .and_then(|s| serde_json::from_str::<Request>(s).ok());
+            Some(Box::new(SetHotkeyActionCommand { slot, action }))
+        }
+        "clear_hotkey_key" => {
+            let slot = request.args.get("slot").cloned();
+            Some(Box::new(ClearHotkeyKeyCommand { slot }))
+        }
+        "set_hotkey_action_and_key" => {
+            let slot = request.args.get("slot").cloned();
+            let action = request
+                .args
+                .get("action")
+                .and_then(|s| serde_json::from_str::<Request>(s).ok());
+            let key_chord = request.args.get("key_chord").cloned();
+            Some(Box::new(SetHotkeyActionAndKeyCommand {
+                slot,
+                action,
+                key_chord,
+            }))
+        }
+        _ => None,
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::types::socket::Request;
+    use std::collections::HashMap;
+
+    #[test]
+    fn test_parse_set_volume_valid() {
+        let mut args = HashMap::new();
+        args.insert("volume".to_string(), "0.5".to_string());
+        args.insert("id".to_string(), "1".to_string());
+        let request = Request {
+            name: "set_volume".to_string(),
+            args,
+        };
+
+        let cmd = parse_command(&request);
+        assert!(cmd.is_some());
+    }
+
+    #[test]
+    fn test_parse_set_volume_missing_volume() {
+        let mut args = HashMap::new();
+        args.insert("id".to_string(), "1".to_string());
+        let request = Request {
+            name: "set_volume".to_string(),
+            args,
+        };
+
+        let cmd = parse_command(&request);
+        assert!(cmd.is_some());
+    }
+
+    #[test]
+    fn test_parse_set_volume_invalid_volume() {
+        let mut args = HashMap::new();
+        args.insert("volume".to_string(), "not-a-float".to_string());
+        let request = Request {
+            name: "set_volume".to_string(),
+            args,
+        };
+
+        let cmd = parse_command(&request);
+        assert!(cmd.is_some());
+    }
+
+    #[test]
+    fn test_parse_set_volume_missing_id() {
+        let mut args = HashMap::new();
+        args.insert("volume".to_string(), "0.5".to_string());
+        let request = Request {
+            name: "set_volume".to_string(),
+            args,
+        };
+
+        let cmd = parse_command(&request);
+        assert!(cmd.is_some());
+    }
+
+    #[test]
+    fn test_parse_set_volume_invalid_id() {
+        let mut args = HashMap::new();
+        args.insert("id".to_string(), "not-an-int".to_string());
+        args.insert("volume".to_string(), "0.5".to_string());
+        let request = Request {
+            name: "set_volume".to_string(),
+            args,
+        };
+
+        let cmd = parse_command(&request);
+        assert!(cmd.is_some());
+    }
+
+    #[test]
+    fn test_parse_set_volume_empty_args() {
+        let request = Request {
+            name: "set_volume".to_string(),
+            args: HashMap::new(),
+        };
+
+        let cmd = parse_command(&request);
+        assert!(cmd.is_some());
+    }
+}

pwsp-lib/src/utils/config.rs

@@ -0,0 +1,7 @@
+use anyhow::Result;
+use std::path::PathBuf;
+
+pub fn get_config_path() -> Result<PathBuf> {
+    let config_path = dirs::config_dir().expect("Failed to obtain config dir");
+    Ok(config_path.join("pwsp"))
+}

pwsp-lib/src/utils/daemon.rs

@@ -0,0 +1,144 @@
+use crate::types::{
+    audio_player::AudioPlayer,
+    config::DaemonConfig,
+    socket::{MAX_MESSAGE_SIZE, Request, Response},
+};
+
+use anyhow::Result;
+use std::os::unix::fs::{DirBuilderExt, MetadataExt, PermissionsExt};
+use std::path::PathBuf;
+use std::{env, error::Error, fs};
+use tokio::{
+    io::{AsyncReadExt, AsyncWriteExt},
+    net::UnixStream,
+    sync::{Mutex, OnceCell},
+    time::{Duration, sleep},
+};
+
+static AUDIO_PLAYER: OnceCell<Mutex<AudioPlayer>> = OnceCell::const_new();
+
+pub async fn get_audio_player() -> Result<&'static Mutex<AudioPlayer>, String> {
+    AUDIO_PLAYER
+        .get_or_try_init(|| async {
+            println!("Initializing audio player");
+            match AudioPlayer::new().await {
+                Ok(player) => Ok(Mutex::new(player)),
+                Err(err) => Err(err.to_string()),
+            }
+        })
+        .await
+}
+
+pub fn get_daemon_config() -> DaemonConfig {
+    DaemonConfig::load_from_file().unwrap_or_else(|_| {
+        let config = DaemonConfig::default();
+        config.save_to_file().ok();
+        config
+    })
+}
+
+fn get_current_uid() -> u32 {
+    rustix::process::geteuid().as_raw()
+}
+
+pub fn get_runtime_dir() -> PathBuf {
+    dirs::runtime_dir().unwrap_or_else(|| {
+        let uid = get_current_uid();
+        env::temp_dir().join(format!("pwsp-{}", uid))
+    })
+}
+
+pub fn create_runtime_dir() -> Result<()> {
+    let runtime_dir = get_runtime_dir();
+
+    if runtime_dir.exists() {
+        let meta = fs::symlink_metadata(&runtime_dir)?;
+        if meta.is_symlink() {
+            return Err(anyhow::anyhow!("Runtime directory is a symlink"));
+        }
+        let uid = get_current_uid();
+        if meta.uid() != uid {
+            return Err(anyhow::anyhow!(
+                "Runtime directory is owned by another user"
+            ));
+        }
+        if meta.permissions().mode() & 0o777 != 0o700 {
+            return Err(anyhow::anyhow!(
+                "Runtime directory has incorrect permissions"
+            ));
+        }
+    } else {
+        fs::DirBuilder::new()
+            .recursive(true)
+            .mode(0o700)
+            .create(&runtime_dir)?;
+    }
+
+    Ok(())
+}
+
+pub fn is_daemon_running() -> Result<bool> {
+    let lock_file = fs::OpenOptions::new()
+        .create(true)
+        .write(true)
+        .truncate(false)
+        .open(get_runtime_dir().join("daemon.lock"))?;
+    match lock_file.try_lock() {
+        Ok(_) => Ok(false),
+        Err(_) => Ok(true),
+    }
+}
+
+pub async fn wait_for_daemon() -> Result<()> {
+    if is_daemon_running()? {
+        return Ok(());
+    }
+
+    println!("Daemon not found, waiting for it...");
+    while !is_daemon_running()? {
+        sleep(Duration::from_millis(100)).await;
+    }
+
+    println!("Found running daemon");
+
+    Ok(())
+}
+
+pub async fn make_request(request: Request) -> Result<Response, Box<dyn Error + Send + Sync>> {
+    let socket_path = get_runtime_dir().join("daemon.sock");
+    let mut stream = UnixStream::connect(socket_path).await?;
+
+    // ---------- Send request (start) ----------
+    let request_data = serde_json::to_vec(&request)?;
+    let request_len = request_data.len() as u32;
+    if stream.write_all(&request_len.to_le_bytes()).await.is_err() {
+        return Err("Failed to send request length".into());
+    };
+    if stream.write_all(&request_data).await.is_err() {
+        return Err("Failed to send request".into());
+    }
+    // ---------- Send request (end) ----------
+
+    // ---------- Read response (start) ----------
+    let mut len_bytes = [0u8; 4];
+    if stream.read_exact(&mut len_bytes).await.is_err() {
+        return Err("Failed to read response length".into());
+    }
+    let response_len = u32::from_le_bytes(len_bytes) as usize;
+
+    if response_len > MAX_MESSAGE_SIZE {
+        eprintln!(
+            "Failed to read response from daemon: response too large ({} bytes)!",
+            response_len
+        );
+        return Err("Response too large".into());
+    }
+
+    let mut buffer = vec![0u8; response_len];
+    if stream.read_exact(&mut buffer).await.is_err() {
+        return Err("Failed to read response".into());
+    };
+    // ---------- Read response (end) ----------
+
+    Ok(serde_json::from_slice(&buffer)?)
+}

pwsp-lib/src/utils/global_hotkeys.rs

@@ -0,0 +1,201 @@
+use crate::{types::config::HotkeyConfig, utils::commands::parse_command};
+use evdev::{Device, EventStream, EventSummary, KeyCode};
+
+struct ModifierState {
+    ctrl: bool,
+    alt: bool,
+    shift: bool,
+    meta: bool,
+}
+
+impl ModifierState {
+    fn new() -> Self {
+        Self {
+            ctrl: false,
+            alt: false,
+            shift: false,
+            meta: false,
+        }
+    }
+
+    fn update(&mut self, key: KeyCode, pressed: bool) {
+        match key {
+            KeyCode::KEY_LEFTCTRL | KeyCode::KEY_RIGHTCTRL => self.ctrl = pressed,
+            KeyCode::KEY_LEFTALT | KeyCode::KEY_RIGHTALT => self.alt = pressed,
+            KeyCode::KEY_LEFTSHIFT | KeyCode::KEY_RIGHTSHIFT => self.shift = pressed,
+            KeyCode::KEY_LEFTMETA | KeyCode::KEY_RIGHTMETA => self.meta = pressed,
+            _ => {}
+        }
+    }
+
+    fn any_active(&self) -> bool {
+        self.ctrl || self.alt || self.shift || self.meta
+    }
+
+    fn is_modifier(key: KeyCode) -> bool {
+        matches!(
+            key,
+            KeyCode::KEY_LEFTCTRL
+                | KeyCode::KEY_RIGHTCTRL
+                | KeyCode::KEY_LEFTALT
+                | KeyCode::KEY_RIGHTALT
+                | KeyCode::KEY_LEFTSHIFT
+                | KeyCode::KEY_RIGHTSHIFT
+                | KeyCode::KEY_LEFTMETA
+                | KeyCode::KEY_RIGHTMETA
+        )
+    }
+}
+
+fn evdev_key_name(key: KeyCode) -> Option<&'static str> {
+    match key {
+        KeyCode::KEY_A => Some("A"),
+        KeyCode::KEY_B => Some("B"),
+        KeyCode::KEY_C => Some("C"),
+        KeyCode::KEY_D => Some("D"),
+        KeyCode::KEY_E => Some("E"),
+        KeyCode::KEY_F => Some("F"),
+        KeyCode::KEY_G => Some("G"),
+        KeyCode::KEY_H => Some("H"),
+        KeyCode::KEY_I => Some("I"),
+        KeyCode::KEY_J => Some("J"),
+        KeyCode::KEY_K => Some("K"),
+        KeyCode::KEY_L => Some("L"),
+        KeyCode::KEY_M => Some("M"),
+        KeyCode::KEY_N => Some("N"),
+        KeyCode::KEY_O => Some("O"),
+        KeyCode::KEY_P => Some("P"),
+        KeyCode::KEY_Q => Some("Q"),
+        KeyCode::KEY_R => Some("R"),
+        KeyCode::KEY_S => Some("S"),
+        KeyCode::KEY_T => Some("T"),
+        KeyCode::KEY_U => Some("U"),
+        KeyCode::KEY_V => Some("V"),
+        KeyCode::KEY_W => Some("W"),
+        KeyCode::KEY_X => Some("X"),
+        KeyCode::KEY_Y => Some("Y"),
+        KeyCode::KEY_Z => Some("Z"),
+        KeyCode::KEY_1 => Some("1"),
+        KeyCode::KEY_2 => Some("2"),
+        KeyCode::KEY_3 => Some("3"),
+        KeyCode::KEY_4 => Some("4"),
+        KeyCode::KEY_5 => Some("5"),
+        KeyCode::KEY_6 => Some("6"),
+        KeyCode::KEY_7 => Some("7"),
+        KeyCode::KEY_8 => Some("8"),
+        KeyCode::KEY_9 => Some("9"),
+        KeyCode::KEY_0 => Some("0"),
+        KeyCode::KEY_F1 => Some("F1"),
+        KeyCode::KEY_F2 => Some("F2"),
+        KeyCode::KEY_F3 => Some("F3"),
+        KeyCode::KEY_F4 => Some("F4"),
+        KeyCode::KEY_F5 => Some("F5"),
+        KeyCode::KEY_F6 => Some("F6"),
+        KeyCode::KEY_F7 => Some("F7"),
+        KeyCode::KEY_F8 => Some("F8"),
+        KeyCode::KEY_F9 => Some("F9"),
+        KeyCode::KEY_F10 => Some("F10"),
+        KeyCode::KEY_F11 => Some("F11"),
+        KeyCode::KEY_F12 => Some("F12"),
+        _ => None,
+    }
+}
+
+fn build_chord(modifiers: &ModifierState, key_name: &str) -> String {
+    let mut parts = Vec::with_capacity(5);
+    if modifiers.ctrl {
+        parts.push("Ctrl");
+    }
+    if modifiers.alt {
+        parts.push("Alt");
+    }
+    if modifiers.shift {
+        parts.push("Shift");
+    }
+    if modifiers.meta {
+        parts.push("Super");
+    }
+    parts.push(key_name);
+    parts.join("+")
+}
+
+fn is_keyboard(device: &Device) -> bool {
+    device
+        .supported_keys()
+        .is_some_and(|keys| keys.contains(KeyCode::KEY_A) && keys.contains(KeyCode::KEY_Z))
+}
+
+async fn handle_device_events(mut stream: EventStream) {
+    let mut modifiers = ModifierState::new();
+
+    loop {
+        match stream.next_event().await {
+            Ok(event) => {
+                if let EventSummary::Key(_, key, value) = event.destructure() {
+                    // 0 = released, 1 = pressed, 2 = repeat
+                    if value == 0 || value == 1 {
+                        modifiers.update(key, value == 1);
+                    }
+
+                    // Only trigger on press, skip modifiers and bare keys
+                    if value != 1 || ModifierState::is_modifier(key) || !modifiers.any_active() {
+                        continue;
+                    }
+
+                    let Some(key_name) = evdev_key_name(key) else {
+                        continue;
+                    };
+
+                    let chord = build_chord(&modifiers, key_name);
+
+                    let config = match HotkeyConfig::load() {
+                        Ok(c) => c,
+                        Err(_) => continue,
+                    };
+
+                    let slots = config.slots_for_chord(&chord);
+                    for slot in slots {
+                        if let Some(cmd) = parse_command(&slot.action) {
+                            cmd.execute().await;
+                        }
+                    }
+                }
+            }
+            Err(e) => {
+                eprintln!("Global hotkeys: device read error: {e}");
+                break;
+            }
+        }
+    }
+}
+
+pub async fn start_global_hotkey_listener() {
+    let keyboards: Vec<_> = evdev::enumerate()
+        .filter(|(_, dev)| is_keyboard(dev))
+        .collect();
+
+    if keyboards.is_empty() {
+        eprintln!(
+            "Global hotkeys: no keyboard devices found. \
+             Make sure your user is in the 'input' group."
+        );
+        return;
+    }
+
+    println!(
+        "Global hotkeys: found {} keyboard device(s)",
+        keyboards.len()
+    );
+
+    for (path, device) in keyboards {
+        match device.into_event_stream() {
+            Ok(stream) => {
+                println!("Global hotkeys: listening on {}", path.display());
+                tokio::spawn(handle_device_events(stream));
+            }
+            Err(e) => {
+                eprintln!("Global hotkeys: failed to open {}: {}", path.display(), e);
+            }
+        }
+    }
+}

pwsp-lib/src/utils/gui.rs

@@ -0,0 +1,141 @@
+use crate::{
+    types::{
+        audio_player::FullState,
+        config::{GuiConfig, HotkeyConfig},
+        gui::AudioPlayerState,
+        socket::{Request, Response},
+    },
+    utils::daemon::{is_daemon_running, make_request},
+};
+use anyhow::{Result, anyhow};
+use std::{
+    path::PathBuf,
+    sync::{Arc, Mutex},
+    time::Instant,
+};
+use tokio::time::{Duration, sleep};
+
+pub fn get_gui_config() -> GuiConfig {
+    GuiConfig::load_from_file().unwrap_or_else(|_| {
+        let mut config = GuiConfig::default();
+        config.save_to_file().ok();
+        config
+    })
+}
+
+pub fn make_request_sync(request: Request) -> Result<Response> {
+    tokio::task::block_in_place(|| {
+        tokio::runtime::Handle::current()
+            .block_on(make_request(request))
+            .map_err(|e| anyhow!(e))
+    })
+}
+
+pub fn make_request_async(request: Request) {
+    tokio::spawn(async move {
+        make_request(request).await.ok();
+    });
+}
+
+pub fn ensure_pwsp_audio_dir() -> PathBuf {
+    let audio_dir = dirs::audio_dir().unwrap_or("~/Music".into());
+    let pwsp_audio_dir = audio_dir.join("PWSP");
+
+    if !pwsp_audio_dir.exists() {
+        std::fs::create_dir_all(&pwsp_audio_dir).ok();
+    }
+
+    pwsp_audio_dir
+}
+
+pub fn format_time_pair(position: f32, duration: f32) -> String {
+    fn format_time(seconds: f32) -> String {
+        let total_seconds = seconds.round() as u32;
+        let minutes = total_seconds / 60;
+        let secs = total_seconds % 60;
+        format!("{:02}:{:02}", minutes, secs)
+    }
+
+    format!("{}/{}", format_time(position), format_time(duration))
+}
+
+pub fn start_app_state_thread(audio_player_state_shared: Arc<Mutex<AudioPlayerState>>) {
+    tokio::spawn(async move {
+        let sleep_duration = Duration::from_secs_f32(1.0 / 60.0);
+        let mut last_hotkey_poll = Instant::now();
+
+        loop {
+            let is_running = is_daemon_running().unwrap_or(false);
+
+            if !is_running {
+                {
+                    let mut guard = audio_player_state_shared
+                        .lock()
+                        .unwrap_or_else(|e| e.into_inner());
+                    guard.is_daemon_running = false;
+                }
+                sleep(Duration::from_millis(500)).await;
+                continue;
+            }
+
+            let full_state_req = Request::get_full_state();
+            let full_state_res = make_request(full_state_req).await.unwrap_or_default();
+
+            if full_state_res.status {
+                let full_state: FullState =
+                    serde_json::from_str(&full_state_res.message).unwrap_or_default();
+
+                let mut guard = audio_player_state_shared
+                    .lock()
+                    .unwrap_or_else(|e| e.into_inner());
+
+                guard.state = match guard.new_state.clone() {
+                    Some(new_state) => {
+                        guard.new_state = None;
+                        new_state
+                    }
+                    None => full_state.state,
+                };
+                guard.tracks = full_state.tracks;
+                guard.volume = full_state.volume;
+                guard.current_input = full_state
+                    .current_input
+                    .split(" - ")
+                    .next()
+                    .unwrap_or_default()
+                    .to_string();
+
+                if guard.all_inputs != full_state.all_inputs {
+                    guard.all_inputs = full_state.all_inputs;
+                    let mut sorted: Vec<(String, String)> = guard
+                        .all_inputs
+                        .iter()
+                        .map(|(k, v)| (k.clone(), v.clone()))
+                        .collect();
+                    sorted.sort_by(|a, b| a.0.cmp(&b.0));
+                    guard.all_inputs_sorted = sorted;
+                }
+
+                guard.is_daemon_running = true;
+            }
+
+            // Poll hotkey config at a lower frequency (~every 2 seconds)
+            if last_hotkey_poll.elapsed() >= Duration::from_secs(2) {
+                let hotkey_res = make_request(Request::get_hotkeys())
+                    .await
+                    .unwrap_or_default();
+                if hotkey_res.status
+                    && let Ok(config) = serde_json::from_str::<HotkeyConfig>(&hotkey_res.message)
+                {
+                    let mut guard = audio_player_state_shared
+                        .lock()
+                        .unwrap_or_else(|e| e.into_inner());
+                    guard.hotkey_config = Some(config);
+                }
+                last_hotkey_poll = Instant::now();
+            }
+
+            sleep(sleep_duration).await;
+        }
+    });
+}

pwsp-lib/src/utils/mod.rs

@@ -0,0 +1,6 @@
+pub mod commands;
+pub mod config;
+pub mod daemon;
+pub mod global_hotkeys;
+pub mod gui;
+pub mod pipewire;

pwsp-lib/src/utils/pipewire.rs

@@ -0,0 +1,383 @@
+use crate::types::pipewire::{AudioDevice, DeviceType, Port, Terminate};
+use anyhow::{Result, anyhow};
+use pipewire::{
+    context::ContextRc, link::Link, main_loop::MainLoopRc, properties::properties,
+    registry::GlobalObject, spa::utils::dict::DictRef,
+};
+use std::{collections::HashMap, thread};
+use tokio::{
+    sync::mpsc,
+    time::{Duration, timeout},
+};
+
+pub fn setup_pipewire_context() -> Result<(MainLoopRc, ContextRc), String> {
+    pipewire::init();
+    let main_loop = MainLoopRc::new(None).map_err(|e| e.to_string())?;
+    let context = ContextRc::new(&main_loop, None).map_err(|e| e.to_string())?;
+    Ok((main_loop, context))
+}
+
+fn parse_global_object(
+    global_object: &GlobalObject<&DictRef>,
+) -> (Option<AudioDevice>, Option<Port>) {
+    let props = match global_object.props {
+        Some(p) => p,
+        None => return (None, None),
+    };
+
+    if let Some(media_class) = props.get("media.class") {
+        let node_id = global_object.id;
+        let node_nick = props.get("node.nick");
+        let node_name = props.get("node.name");
+        let node_description = props.get("node.description");
+
+        if media_class.starts_with("Audio/Source") {
+            let input_device = AudioDevice::new(
+                node_id,
+                node_nick,
+                node_description,
+                node_name,
+                DeviceType::Input,
+            );
+            return (Some(input_device), None);
+        } else if media_class.starts_with("Stream/Output/Audio") {
+            let output_device = AudioDevice::new(
+                node_id,
+                node_nick,
+                node_description,
+                node_name,
+                DeviceType::Output,
+            );
+            return (Some(output_device), None);
+        }
+        return (None, None);
+    }
+
+    if props.get("port.direction").is_some()
+        && let (Some(node_id), Some(port_id), Some(port_name)) = (
+            props.get("node.id").and_then(|id| id.parse::<u32>().ok()),
+            props.get("port.id").and_then(|id| id.parse::<u32>().ok()),
+            props.get("port.name"),
+        )
+    {
+        let port = Port {
+            node_id,
+            port_id,
+            name: port_name.to_string(),
+        };
+        return (None, Some(port));
+    }
+
+    (None, None)
+}
+
+async fn pw_get_global_objects_thread(
+    main_sender: mpsc::Sender<(Option<AudioDevice>, Option<Port>)>,
+    pw_receiver: pipewire::channel::Receiver<Terminate>,
+    init_sender: tokio::sync::oneshot::Sender<Result<(), String>>,
+) {
+    let (main_loop, context) = match setup_pipewire_context() {
+        Ok(res) => res,
+        Err(e) => {
+            let _ = init_sender.send(Err(e));
+            return;
+        }
+    };
+
+    // Stop main loop on Terminate message
+    let _receiver = pw_receiver.attach(main_loop.loop_(), {
+        let _main_loop = main_loop.clone();
+        move |_| _main_loop.quit()
+    });
+
+    let core = match context.connect(None) {
+        Ok(core) => core,
+        Err(e) => {
+            let _ = init_sender.send(Err(format!("Failed to connect to pipewire context: {}", e)));
+            return;
+        }
+    };
+
+    let registry = match core.get_registry() {
+        Ok(registry) => registry,
+        Err(e) => {
+            let _ = init_sender.send(Err(format!(
+                "Failed to get registry from pipewire context: {}",
+                e
+            )));
+            return;
+        }
+    };
+
+    let _listener = registry
+        .add_listener_local()
+        .global(move |global| {
+            // Try to parse every global object pipewire finds
+            let (device, port) = parse_global_object(global);
+
+            // Send message to the main thread
+            let sender_clone = main_sender.clone();
+            tokio::task::spawn(async move {
+                sender_clone.send((device, port)).await.ok();
+            });
+        })
+        .register();
+
+    // Signal successful initialization
+    if init_sender.send(Ok(())).is_err() {
+        return;
+    }
+
+    main_loop.run();
+}
+
+pub async fn get_all_devices() -> Result<(Vec<AudioDevice>, Vec<AudioDevice>)> {
+    // Channels to communicate with pipewire thread
+    let (main_sender, mut main_receiver) = mpsc::channel(10);
+    let (pw_sender, pw_receiver) = pipewire::channel::channel();
+    let (init_sender, init_receiver) = tokio::sync::oneshot::channel();
+
+    // Spawn pipewire thread in background
+    let _pw_thread = tokio::spawn(async move {
+        pw_get_global_objects_thread(main_sender, pw_receiver, init_sender).await
+    });
+
+    // Wait for initialization to complete
+    if let Err(e) = init_receiver.await {
+        return Err(anyhow!(e));
+    }
+
+    let mut input_devices: HashMap<u32, AudioDevice> = HashMap::new();
+    let mut output_devices: HashMap<u32, AudioDevice> = HashMap::new();
+    let mut ports: Vec<Port> = vec![];
+
+    loop {
+        // If we don't receive a message in 100ms, we can assume that pipewire thread is finished
+        match timeout(Duration::from_millis(100), main_receiver.recv()).await {
+            Ok(Some((device, port))) => {
+                if let Some(device) = device {
+                    match device.device_type {
+                        DeviceType::Input => {
+                            input_devices.insert(device.id, device);
+                        }
+                        DeviceType::Output => {
+                            output_devices.insert(device.id, device);
+                        }
+                    }
+                } else if let Some(port) = port {
+                    ports.push(port);
+                }
+            }
+            Ok(None) | Err(_) => {
+                // Pipewire thread is finished and we can collect our devices
+                let _ = pw_sender.send(Terminate {});
+
+                for port in ports {
+                    let node_id = port.node_id;
+
+                    if let Some(input_device) = input_devices.get_mut(&node_id) {
+                        input_device.add_port(port);
+                    } else if let Some(output_device) = output_devices.get_mut(&node_id) {
+                        output_device.add_port(port);
+                    }
+                }
+
+                let mut input_devices: Vec<AudioDevice> = input_devices.into_values().collect();
+                let mut output_devices: Vec<AudioDevice> = output_devices.into_values().collect();
+
+                input_devices.sort_by_key(|a| a.id);
+                output_devices.sort_by_key(|a| a.id);
+
+                return Ok((input_devices, output_devices));
+            }
+        }
+    }
+}
+
+pub async fn get_device(device_name: &str) -> Result<AudioDevice> {
+    let (input_devices, output_devices) = get_all_devices().await?;
+
+    input_devices
+        .into_iter()
+        .chain(output_devices)
+        .find(|device| {
+            device.name == device_name
+                || device.nick == device_name
+                || device.name.contains(device_name)
+                || device.nick.contains(device_name)
+        })
+        .ok_or_else(|| anyhow!("Device not found"))
+}
+
+pub fn create_virtual_mic() -> Result<pipewire::channel::Sender<Terminate>> {
+    let (pw_sender, pw_receiver) = pipewire::channel::channel::<Terminate>();
+    let (init_sender, init_receiver) = std::sync::mpsc::sync_channel(0);
+
+    let _pw_thread = thread::spawn(move || {
+        let (main_loop, context) = match setup_pipewire_context() {
+            Ok(res) => res,
+            Err(e) => {
+                let _ = init_sender.send(Err(e));
+                return;
+            }
+        };
+        let core = match context.connect(None) {
+            Ok(core) => core,
+            Err(e) => {
+                let _ =
+                    init_sender.send(Err(format!("Failed to connect to pipewire context: {}", e)));
+                return;
+            }
+        };
+
+        let props = properties!(
+            "factory.name" => "support.null-audio-sink",
+            "node.name" => "pwsp-virtual-mic",
+            "node.description" => "PWSP Virtual Mic",
+            "media.class" => "Audio/Source/Virtual",
+            "audio.position" => "[ FL FR ]",
+            "audio.channels" => "2",
+            "object.linger" => "false", // Destroy the node on app exit
+        );
+
+        let _node = match core.create_object::<pipewire::node::Node>("adapter", &props) {
+            Ok(node) => node,
+            Err(e) => {
+                let _ = init_sender.send(Err(format!("Failed to create virtual mic: {}", e)));
+                return;
+            }
+        };
+
+        let _receiver = pw_receiver.attach(main_loop.loop_(), {
+            let _main_loop = main_loop.clone();
+            move |_| _main_loop.quit()
+        });
+
+        println!("Virtual mic created");
+        if init_sender.send(Ok(())).is_err() {
+            return;
+        }
+        main_loop.run();
+    });
+
+    if let Err(e) = init_receiver.recv()? {
+        return Err(anyhow!(e));
+    }
+
+    Ok(pw_sender)
+}
+
+pub async fn link_player_to_virtual_mic() -> Result<pipewire::channel::Sender<Terminate>> {
+    let pwsp_daemon_output = match get_device("pwsp-daemon").await {
+        Ok(device) => device,
+        Err(_) => {
+            return Err(anyhow!(
+                "Could not find alsa_playback.pwsp-daemon device, skipping device linking"
+            ));
+        }
+    };
+
+    let pwsp_daemon_input = match get_device("pwsp-virtual-mic").await {
+        Ok(device) => device,
+        Err(_) => {
+            return Err(anyhow!(
+                "Could not find pwsp-virtual-mic device, skipping device linking"
+            ));
+        }
+    };
+
+    let output_fl = match pwsp_daemon_output.output_fl {
+        Some(port) => port,
+        None => return Err(anyhow!("Failed to get pwsp-daemon output_fl")),
+    };
+    let output_fr = match pwsp_daemon_output.output_fr {
+        Some(port) => port,
+        None => return Err(anyhow!("Failed to get pwsp-daemon output_fr")),
+    };
+    let input_fl = match pwsp_daemon_input.input_fl {
+        Some(port) => port,
+        None => return Err(anyhow!("Failed to get pwsp-virtual-mic input_fl")),
+    };
+    let input_fr = match pwsp_daemon_input.input_fr {
+        Some(port) => port,
+        None => return Err(anyhow!("Failed to get pwsp-virtual-mic input_fr")),
+    };
+
+    create_link(output_fl, output_fr, input_fl, input_fr)
+}
+
+pub fn create_link(
+    output_fl: Port,
+    output_fr: Port,
+    input_fl: Port,
+    input_fr: Port,
+) -> Result<pipewire::channel::Sender<Terminate>> {
+    let (pw_sender, pw_receiver) = pipewire::channel::channel::<Terminate>();
+    let (init_sender, init_receiver) = std::sync::mpsc::sync_channel(0);
+
+    let _pw_thread = thread::spawn(move || {
+        let (main_loop, context) = match setup_pipewire_context() {
+            Ok(res) => res,
+            Err(e) => {
+                let _ = init_sender.send(Err(e));
+                return;
+            }
+        };
+        let core = match context.connect(None) {
+            Ok(core) => core,
+            Err(e) => {
+                let _ =
+                    init_sender.send(Err(format!("Failed to connect to pipewire context: {}", e)));
+                return;
+            }
+        };
+
+        let props_fl = properties! {
+            "link.output.node" => format!("{}", output_fl.node_id).as_str(),
+            "link.output.port" => format!("{}", output_fl.port_id).as_str(),
+            "link.input.node"  => format!("{}", input_fl.node_id).as_str(),
+            "link.input.port"  => format!("{}", input_fl.port_id).as_str(),
+        };
+        let props_fr = properties! {
+            "link.output.node" => format!("{}", output_fr.node_id).as_str(),
+            "link.output.port" => format!("{}", output_fr.port_id).as_str(),
+            "link.input.node"  => format!("{}", input_fr.node_id).as_str(),
+            "link.input.port"  => format!("{}", input_fr.port_id).as_str(),
+        };
+
+        let _link_fl = match core.create_object::<Link>("link-factory", &props_fl) {
+            Ok(link) => link,
+            Err(e) => {
+                let _ = init_sender.send(Err(format!("Failed to create link FL: {}", e)));
+                return;
+            }
+        };
+        let _link_fr = match core.create_object::<Link>("link-factory", &props_fr) {
+            Ok(link) => link,
+            Err(e) => {
+                let _ = init_sender.send(Err(format!("Failed to create link FR: {}", e)));
+                return;
+            }
+        };
+
+        let _receiver = pw_receiver.attach(main_loop.loop_(), {
+            let _main_loop = main_loop.clone();
+            move |_| _main_loop.quit()
+        });
+
+        println!(
+            "Link created: FL: {}-{} FR: {}-{}",
+            output_fl.node_id, input_fl.node_id, output_fr.node_id, input_fr.node_id
+        );
+        if init_sender.send(Ok(())).is_err() {
+            return;
+        }
+        main_loop.run();
+    });
+
+    if let Err(e) = init_receiver.recv()? {
+        return Err(anyhow!(e));
+    }
+
+    Ok(pw_sender)
+}