feat(ags): transfer remaining bar stuff from v1

modules/ags/config/widgets/misc/persist.ts

@@ -0,0 +1,49 @@
+import { execAsync, readFileAsync, timeout, GLib, type Variable } from 'astal';
+
+const { get_home_dir } = GLib;
+
+
+export default <T>({
+    name,
+    variable,
+    condition = true,
+    whenTrue = condition,
+    whenFalse = false,
+}: {
+    name: string
+    variable: Variable<T>
+    condition?: boolean | string
+    whenTrue?: boolean | string
+    whenFalse?: boolean | string
+}) => {
+    const cacheFile = `${get_home_dir()}/.cache/ags/.${name}`;
+
+    const stateCmd = () => ['bash', '-c',
+        `echo ${variable.get() === condition} > ${cacheFile}`];
+
+    const monitorState = () => {
+        variable.subscribe(() => {
+            execAsync(stateCmd()).catch(print);
+        });
+    };
+
+    readFileAsync(cacheFile)
+        .then((content) => {
+            // JSON.parse was the only way I found to reliably
+            // convert a string of 'true' or 'false' into a bool
+            const value = (JSON.parse(content) ? whenTrue : whenFalse) as T;
+
+            variable.set(value);
+
+            timeout(1000, () => {
+                monitorState();
+            });
+        })
+        .catch(() => {
+            execAsync(stateCmd())
+                .then(() => {
+                    monitorState();
+                })
+                .catch(print);
+        });
+};