From 36e5025868cfd674ef4f8a0ae0529371d6581572 Mon Sep 17 00:00:00 2001
From: Ryan Schanzenbacher <ryan@rschanz.org>
Date: Thu, 9 Jul 2026 23:28:49 -0400
Subject: hammerspoon listener pt 1

---
 hosts/RyanMac/configuration.nix                    |  1 +
 users/ryan/hammerspoon/init.lua                    | 35 ++++++++++++++++++++++
 users/ryan/home.nix                                |  3 ++
 .../lib/components/data/sound.jsx                  |  2 +-
 4 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 users/ryan/hammerspoon/init.lua

diff --git a/hosts/RyanMac/configuration.nix b/hosts/RyanMac/configuration.nix
index 088b774..19ffeec 100644
--- a/hosts/RyanMac/configuration.nix
+++ b/hosts/RyanMac/configuration.nix
@@ -179,6 +179,7 @@ in {
       "tailscale-app"
       "netbird-ui"
       "ubersicht"
+      "hammerspoon"
     ];
   };
 
diff --git a/users/ryan/hammerspoon/init.lua b/users/ryan/hammerspoon/init.lua
new file mode 100644
index 0000000..1245a09
--- /dev/null
+++ b/users/ryan/hammerspoon/init.lua
@@ -0,0 +1,35 @@
+-- ~/.hammerspoon/init.lua
+
+local function refreshWidget()
+    hs.http.asyncGet("http://127.0.0.1:7776/widget/sound/refresh", nil, function(status, body, headers)
+        -- optional: log failures
+        if status ~= 200 then
+            print("Widget refresh failed with status: " .. tostring(status))
+        end
+    end)
+end
+
+local function audioWatcherCallback(uid, eventName, scope, element)
+    -- "vmvc" = volume changed, "mute" = mute toggled
+    if eventName == "vmvc" or eventName == "mute" then
+        refreshWidget()
+    end
+end
+
+local function setupAudioWatcher()
+    local device = hs.audiodevice.defaultOutputDevice()
+    if device then
+        device:watcherCallback(audioWatcherCallback)
+        device:watcherStart()
+    end
+end
+
+setupAudioWatcher()
+
+-- Re-attach the watcher if the default output device changes (e.g. plugging in headphones)
+hs.audiodevice.watcher.setCallback(function(event)
+    if event == "dOut " then  -- note: the trailing space is intentional, it's part of the event name
+        setupAudioWatcher()
+    end
+end)
+hs.audiodevice.watcher.start()
diff --git a/users/ryan/home.nix b/users/ryan/home.nix
index f1c1b32..2aaacb3 100644
--- a/users/ryan/home.nix
+++ b/users/ryan/home.nix
@@ -106,6 +106,9 @@
     '';
   };
 
+  # Add hammerspoon if on mac
+  home.file.".hammerspoon".source = lib.mkIf pkgs.stdenv.isDarwin ./hammerspoon;
+
   programs.zsh = {
     enable = true;
     initContent = let
diff --git a/users/ryan/modules/simple-bar/simple-bar-source/lib/components/data/sound.jsx b/users/ryan/modules/simple-bar/simple-bar-source/lib/components/data/sound.jsx
index a3c5cab..3b39594 100755
--- a/users/ryan/modules/simple-bar/simple-bar-source/lib/components/data/sound.jsx
+++ b/users/ryan/modules/simple-bar/simple-bar-source/lib/components/data/sound.jsx
@@ -56,7 +56,7 @@ export const Widget = React.memo(() => {
     if (!visible) return;
     const output = await Utils.cachedRun(
       `osascript -e 'set v to get volume settings' -e 'output volume of v & output muted of v'`,
-      refresh,
+      500,
     );
     const parts = Utils.cleanupOutput(output).split(", ");
     setState({
-- 
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