init

packages/ags/bk/services/brightness.js

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+import { bash, dependencies, sh } from "../lib/utils.js"
+
+if (!dependencies("brightnessctl"))
+  App.quit()
+
+const get = (args) => Number(Utils.exec(`brightnessctl ${args}`))
+const screen = await bash`ls -w1 /sys/class/backlight | head -1`
+const kbd = await bash`ls -w1 /sys/class/leds | head -1`
+
+class Brightness extends Service {
+  static {
+    Service.register(this, {}, {
+      "screen": ["float", "rw"],
+      "kbd": ["int", "rw"],
+    })
+  }
+
+  #kbdMax = get(`--device ${kbd} max`)
+  #kbd = get(`--device ${kbd} get`)
+  #screenMax = get("max")
+  #screen = get("get") / get("max")
+
+  get kbd() { return this.#kbd }
+  get screen() { return this.#screen }
+
+  set kbd(value) {
+    if (value < 0 || value > this.#kbdMax)
+      return
+
+    sh(`brightnessctl -d ${kbd} s ${value} -q`).then(() => {
+      this.#kbd = value
+      this.changed("kbd")
+    })
+  }
+
+  set screen(percent) {
+    if (percent < 0)
+      percent = 0
+
+    if (percent > 1)
+      percent = 1
+
+    sh(`brightnessctl set ${Math.floor(percent * 100)}% -q`).then(() => {
+      this.#screen = percent
+      this.changed("screen")
+    })
+  }
+
+  constructor() {
+    super()
+
+    const screenPath = `/sys/class/backlight/${screen}/brightness`
+    const kbdPath = `/sys/class/leds/${kbd}/brightness`
+
+    Utils.monitorFile(screenPath, async f => {
+      const v = await Utils.readFileAsync(f)
+      this.#screen = Number(v) / this.#screenMax
+      this.changed("screen")
+    })
+
+    Utils.monitorFile(kbdPath, async f => {
+      const v = await Utils.readFileAsync(f)
+      this.#kbd = Number(v) / this.#kbdMax
+      this.changed("kbd")
+    })
+  }
+}
+
+export default new Brightness()