brightness: add ipc handler for get/set (#546)

* services(brightness): add IpcHandler with brightnessctl like set function

* allow get/set for specific monitor

Also handle invalid formats

---------

Co-authored-by: 2 * r + 2 * t <61896496+soramanew@users.noreply.github.com>

services/Brightness.qml

@@ -17,22 +17,41 @@ Singleton {
         return monitors.find(m => m.modelData === screen);
     }
 
+    function getMonitor(query: string): var {
+        if (query === "active") {
+            return monitors.find(m => Hypr.monitorFor(m.modelData)?.focused);
+        }
+
+        if (query.startsWith("model:")) {
+            const model = query.slice(6);
+            return monitors.find(m => m.modelData.model === model);
+        }
+
+        if (query.startsWith("serial:")) {
+            const serial = query.slice(7);
+            return monitors.find(m => m.modelData.serialNumber === serial);
+        }
+
+        if (query.startsWith("id:")) {
+            const id = parseInt(query.slice(3), 10);
+            return monitors.find(m => Hypr.monitorFor(m.modelData)?.id === id);
+        }
+
+        return monitors.find(m => m.modelData.name === query);
+    }
+
     function increaseBrightness(): void {
-        const focusedName = Hypr.focusedMonitor.name;
+        const monitor = getMonitor("active");
-        const monitor = monitors.find(m => focusedName === m.modelData.name);
         if (monitor)
             monitor.setBrightness(monitor.brightness + 0.1);
     }
 
     function decreaseBrightness(): void {
-        const focusedName = Hypr.focusedMonitor.name;
+        const monitor = getMonitor("active");
-        const monitor = monitors.find(m => focusedName === m.modelData.name);
         if (monitor)
             monitor.setBrightness(monitor.brightness - 0.1);
     }
 
-    reloadableId: "brightness"
-
     onMonitorsChanged: {
         ddcMonitors = [];
         ddcProc.running = true;
@@ -78,6 +97,59 @@ Singleton {
         onPressed: root.decreaseBrightness()
     }
 
+    IpcHandler {
+        target: "brightness"
+
+        function get(): real {
+            return getFor("active");
+        }
+
+        // Allows searching by active/model/serial/id/name
+        function getFor(query: string): real {
+            return root.getMonitor(query)?.brightness ?? -1;
+        }
+
+        function set(value: string): string {
+            return setFor("active", value);
+        }
+
+        // Handles brightness value like brightnessctl: 0.1, +0.1, 0.1-, 10%, +10%, 10%-
+        function setFor(query: string, value: string): string {
+            const monitor = root.getMonitor(query);
+            if (!monitor)
+                return "Invalid monitor: " + query;
+
+            let targetBrightness;
+            if (value.endsWith("%-")) {
+                const percent = parseFloat(value.slice(0, -2));
+                targetBrightness = monitor.brightness - (percent / 100);
+            } else if (value.startsWith("+") && value.endsWith("%")) {
+                const percent = parseFloat(value.slice(1, -1));
+                targetBrightness = monitor.brightness + (percent / 100);
+            } else if (value.endsWith("%")) {
+                const percent = parseFloat(value.slice(0, -1));
+                targetBrightness = percent / 100;
+            } else if (value.startsWith("+")) {
+                const increment = parseFloat(value.slice(1));
+                targetBrightness = monitor.brightness + increment;
+            } else if (value.endsWith("-")) {
+                const decrement = parseFloat(value.slice(0, -1));
+                targetBrightness = monitor.brightness - decrement;
+            } else if (value.includes("%") || value.includes("-") || value.includes("+")) {
+                return `Invalid brightness format: ${value}\nExpected: 0.1, +0.1, 0.1-, 10%, +10%, 10%-`;
+            } else {
+                targetBrightness = parseFloat(value);
+            }
+
+            if (isNaN(targetBrightness))
+                return `Failed to parse value: ${value}\nExpected: 0.1, +0.1, 0.1-, 10%, +10%, 10%-`;
+
+            monitor.setBrightness(targetBrightness);
+
+            return `Set monitor ${monitor.modelData.name} brightness to ${+monitor.brightness.toFixed(2)}`;
+        }
+    }
+
     component Monitor: QtObject {
         id: monitor