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| 1 | +//! Desktop host integration for the app-wide sleep-prevention preference. |
| 2 | +//! |
| 3 | +//! The preference is intentionally independent of agent/session activity. While |
| 4 | +//! enabled, the inhibitor lives for the desktop process and is released when |
| 5 | +//! the preference is disabled or the process exits. |
| 6 | +
|
| 7 | +use std::sync::mpsc; |
| 8 | + |
| 9 | +use bitfun_core::service::config::{subscribe_config_updates, ConfigService, ConfigUpdateEvent}; |
| 10 | +use serde::Deserialize; |
| 11 | +use tauri::{AppHandle, Manager, State}; |
| 12 | + |
| 13 | +use crate::api::app_state::AppState; |
| 14 | + |
| 15 | +const PREVENT_SLEEP_CONFIG_PATH: &str = "app.prevent_sleep"; |
| 16 | + |
| 17 | +enum SleepPreventionRequest { |
| 18 | + SetEnabled { |
| 19 | + enabled: bool, |
| 20 | + response: tokio::sync::oneshot::Sender<Result<(), String>>, |
| 21 | + }, |
| 22 | +} |
| 23 | + |
| 24 | +#[derive(Clone)] |
| 25 | +pub struct SleepPreventionState { |
| 26 | + sender: mpsc::Sender<SleepPreventionRequest>, |
| 27 | +} |
| 28 | + |
| 29 | +impl SleepPreventionState { |
| 30 | + async fn set_enabled(&self, enabled: bool) -> Result<(), String> { |
| 31 | + let (response, result) = tokio::sync::oneshot::channel(); |
| 32 | + self.sender |
| 33 | + .send(SleepPreventionRequest::SetEnabled { enabled, response }) |
| 34 | + .map_err(|_| "Sleep-prevention worker is unavailable".to_string())?; |
| 35 | + result |
| 36 | + .await |
| 37 | + .map_err(|_| "Sleep-prevention worker stopped unexpectedly".to_string())? |
| 38 | + } |
| 39 | +} |
| 40 | + |
| 41 | +impl Default for SleepPreventionState { |
| 42 | + fn default() -> Self { |
| 43 | + let (sender, receiver) = mpsc::channel(); |
| 44 | + std::thread::Builder::new() |
| 45 | + .name("bitfun-sleep-prevention".to_string()) |
| 46 | + .spawn(move || run_worker(receiver)) |
| 47 | + .expect("failed to start sleep-prevention worker"); |
| 48 | + Self { sender } |
| 49 | + } |
| 50 | +} |
| 51 | + |
| 52 | +fn run_worker(receiver: mpsc::Receiver<SleepPreventionRequest>) { |
| 53 | + let mut inhibitor = None; |
| 54 | + |
| 55 | + while let Ok(request) = receiver.recv() { |
| 56 | + match request { |
| 57 | + SleepPreventionRequest::SetEnabled { enabled, response } => { |
| 58 | + let _ = response.send(set_inhibitor_enabled(&mut inhibitor, enabled)); |
| 59 | + } |
| 60 | + } |
| 61 | + } |
| 62 | +} |
| 63 | + |
| 64 | +fn set_inhibitor_enabled( |
| 65 | + inhibitor: &mut Option<keepawake::KeepAwake>, |
| 66 | + enabled: bool, |
| 67 | +) -> Result<(), String> { |
| 68 | + if enabled { |
| 69 | + if inhibitor.is_none() { |
| 70 | + let guard = keepawake::Builder::default() |
| 71 | + .idle(true) |
| 72 | + .reason("Prevent sleep is enabled in BitFun") |
| 73 | + .app_name("BitFun") |
| 74 | + .app_reverse_domain("com.bitfun.desktop") |
| 75 | + .create() |
| 76 | + .map_err(|error| format!("Failed to prevent system sleep: {}", error))?; |
| 77 | + *inhibitor = Some(guard); |
| 78 | + log::info!("System sleep prevention enabled"); |
| 79 | + } |
| 80 | + } else if inhibitor.take().is_some() { |
| 81 | + log::info!("System sleep prevention disabled"); |
| 82 | + } |
| 83 | + |
| 84 | + Ok(()) |
| 85 | +} |
| 86 | + |
| 87 | +async fn configured_enabled(config_service: &ConfigService) -> Result<bool, String> { |
| 88 | + config_service |
| 89 | + .get_config::<bool>(Some(PREVENT_SLEEP_CONFIG_PATH)) |
| 90 | + .await |
| 91 | + .map_err(|error| format!("Failed to read prevent-sleep preference: {}", error)) |
| 92 | +} |
| 93 | + |
| 94 | +async fn sync_from_config(config_service: &ConfigService, sleep_prevention: &SleepPreventionState) { |
| 95 | + match configured_enabled(config_service).await { |
| 96 | + Ok(enabled) => { |
| 97 | + if let Err(error) = sleep_prevention.set_enabled(enabled).await { |
| 98 | + log::warn!( |
| 99 | + "Failed to apply prevent-sleep preference: enabled={}, error={}", |
| 100 | + enabled, |
| 101 | + error |
| 102 | + ); |
| 103 | + } |
| 104 | + } |
| 105 | + Err(error) => { |
| 106 | + log::warn!("{}", error); |
| 107 | + } |
| 108 | + } |
| 109 | +} |
| 110 | + |
| 111 | +/// Applies the saved preference at startup and after config imports/reloads. |
| 112 | +pub fn spawn_config_listener(app: AppHandle) { |
| 113 | + let app_state: State<'_, AppState> = app.state(); |
| 114 | + let config_service = app_state.config_service.clone(); |
| 115 | + let sleep_prevention = app.state::<SleepPreventionState>().inner().clone(); |
| 116 | + |
| 117 | + tokio::spawn(async move { |
| 118 | + let Some(mut receiver) = subscribe_config_updates() else { |
| 119 | + log::warn!("Config update subscription unavailable for sleep-prevention listener"); |
| 120 | + sync_from_config(&config_service, &sleep_prevention).await; |
| 121 | + return; |
| 122 | + }; |
| 123 | + |
| 124 | + sync_from_config(&config_service, &sleep_prevention).await; |
| 125 | + |
| 126 | + loop { |
| 127 | + match receiver.recv().await { |
| 128 | + Ok(ConfigUpdateEvent::AppUpdated) | Ok(ConfigUpdateEvent::ConfigReloaded) => { |
| 129 | + sync_from_config(&config_service, &sleep_prevention).await; |
| 130 | + } |
| 131 | + Ok(_) => {} |
| 132 | + Err(tokio::sync::broadcast::error::RecvError::Closed) => { |
| 133 | + log::warn!("Sleep-prevention config listener channel closed"); |
| 134 | + break; |
| 135 | + } |
| 136 | + Err(tokio::sync::broadcast::error::RecvError::Lagged(count)) => { |
| 137 | + log::warn!( |
| 138 | + "Sleep-prevention config listener lagged by {} messages", |
| 139 | + count |
| 140 | + ); |
| 141 | + sync_from_config(&config_service, &sleep_prevention).await; |
| 142 | + } |
| 143 | + } |
| 144 | + } |
| 145 | + }); |
| 146 | +} |
| 147 | + |
| 148 | +#[derive(Debug, Deserialize, Default)] |
| 149 | +#[serde(rename_all = "camelCase")] |
| 150 | +pub struct GetPreventSleepEnabledRequest {} |
| 151 | + |
| 152 | +#[tauri::command] |
| 153 | +pub async fn get_prevent_sleep_enabled( |
| 154 | + app_state: State<'_, AppState>, |
| 155 | + sleep_prevention: State<'_, SleepPreventionState>, |
| 156 | + request: GetPreventSleepEnabledRequest, |
| 157 | +) -> Result<bool, String> { |
| 158 | + let _ = request; |
| 159 | + let enabled = configured_enabled(&app_state.config_service).await?; |
| 160 | + sleep_prevention.set_enabled(enabled).await?; |
| 161 | + Ok(enabled) |
| 162 | +} |
| 163 | + |
| 164 | +#[derive(Debug, Deserialize)] |
| 165 | +#[serde(rename_all = "camelCase")] |
| 166 | +pub struct SetPreventSleepEnabledRequest { |
| 167 | + pub enabled: bool, |
| 168 | +} |
| 169 | + |
| 170 | +#[tauri::command] |
| 171 | +pub async fn set_prevent_sleep_enabled( |
| 172 | + app_state: State<'_, AppState>, |
| 173 | + sleep_prevention: State<'_, SleepPreventionState>, |
| 174 | + request: SetPreventSleepEnabledRequest, |
| 175 | +) -> Result<(), String> { |
| 176 | + let previous = configured_enabled(&app_state.config_service).await?; |
| 177 | + sleep_prevention.set_enabled(request.enabled).await?; |
| 178 | + |
| 179 | + if let Err(error) = app_state |
| 180 | + .config_service |
| 181 | + .set_config(PREVENT_SLEEP_CONFIG_PATH, request.enabled) |
| 182 | + .await |
| 183 | + { |
| 184 | + if let Err(rollback_error) = sleep_prevention.set_enabled(previous).await { |
| 185 | + return Err(format!( |
| 186 | + "Failed to save prevent-sleep preference: {}; runtime rollback also failed: {}", |
| 187 | + error, rollback_error |
| 188 | + )); |
| 189 | + } |
| 190 | + return Err(format!( |
| 191 | + "Failed to save prevent-sleep preference: {}", |
| 192 | + error |
| 193 | + )); |
| 194 | + } |
| 195 | + |
| 196 | + crate::api::remote_connect_api::notify_settings_changed(); |
| 197 | + Ok(()) |
| 198 | +} |
| 199 | + |
| 200 | +#[cfg(test)] |
| 201 | +mod tests { |
| 202 | + use super::SleepPreventionState; |
| 203 | + |
| 204 | + #[tokio::test] |
| 205 | + async fn disabling_an_inactive_inhibitor_is_idempotent() { |
| 206 | + let state = SleepPreventionState::default(); |
| 207 | + state.set_enabled(false).await.unwrap(); |
| 208 | + state.set_enabled(false).await.unwrap(); |
| 209 | + } |
| 210 | +} |
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