Add mac support

index.js

@@ -1,15 +1,9 @@
-const internalSleep = require('./build/Release/node_prevent_sleep.node');
+var os = require("os");
 
-const preventSleep = {
-    _timerId: 0,
-    _intervalTime: 5000,
-    enable: () => {
-        preventSleep._timerId = setInterval(internalSleep.enable, preventSleep._intervalTime);
-    },
-    disable: () => {
-        clearInterval(preventSleep._timerId);
-        internalSleep.disable();
-    }
-};
-
-module.exports = preventSleep;
+if (os.platform == "win32") {
+  module.exports = require("./win");
+} else if (os.platform == "darwin") {
+  module.exports = require("./mac");
+} else {
+  throw new Error("Unsupported platform: " + os.platform);
+}

mac.js

@@ -0,0 +1,29 @@
+var child_process = require("child_process");
+var process = require("process");
+
+const preventSleep = {
+  _caffeinateProcess: undefined,
+  enable: () => {
+    if (preventSleep._caffeinateProcess) {
+      // We are already preventing sleep
+      return;
+    }
+    preventSleep._caffeinateProcess = child_process.spawn("caffeinate", [
+      "-w " + process.pid,
+    ]);
+    preventSleep._caffeinateProcess.on("error", () => {
+      preventSleep._caffeinateProcess = undefined;
+    });
+    preventSleep._caffeinateProcess.on("exit", () => {
+      preventSleep._caffeinateProcess = undefined;
+    });
+  },
+  disable: () => {
+    if (preventSleep._caffeinateProcess) {
+      preventSleep._caffeinateProcess.kill();
+      preventSleep._caffeinateProcess = undefined;
+    }
+  },
+};
+
+module.exports = preventSleep;

package.json

@@ -1,22 +1,33 @@
 {
   "name": "node-prevent-sleep",
-  "version": "0.0.4",
+  "version": "0.1.0",
   "main": "index.js",
-  "author": "Sebastian Alex <sebapotok@gmail.com>",
+  "contributors": [
+    {
+      "name": "Sebastian Alex",
+      "email": "sebapotok@gmail.com",
+      "url": "https://github.com/perf2711"
+    },
+    {
+      "name": "George W. Walker",
+      "email": "george@georgewwalker.com",
+      "url": "https://github.com/pkmnct"
+    }
+  ],
   "license": "MIT",
   "gypfile": true,
   "repository": {
     "type": "git",
     "url": "https://github.com/perf2711/node-prevent-sleep"
   },
   "devDependencies": {
-    "node-gyp": "^6.1.0"
+    "node-gyp": "^9.4.0"
   },
   "dependencies": {
-    "node-addon-api": "^2.0.0"
+    "node-addon-api": "^7.0.0"
   },
   "scripts": {
     "build": "node-gyp rebuild",
     "clean": "node-gyp clean"
   }
-}
+}

readme.md

@@ -29,7 +29,10 @@ Not supported yet. You are welcome to submit a PR with the functionality.
 
 ### Mac
 
-Not supported yet. You are welcome to submit a PR with the functionality.
+When `enable()` is used, a child `caffeinate` process is spawned with the `-w` flag and the process id of Node. This ensures the child process is terminated if Node quits unexpectedly.
+
+When `disable()` is used, the `caffeinate` process is terminated.
 
 ## License
+
 MIT

win.js

@@ -0,0 +1,18 @@
+const internalSleep = require("./build/Release/node_prevent_sleep.node");
+
+const preventSleep = {
+  _timerId: 0,
+  _intervalTime: 5000,
+  enable: () => {
+    preventSleep._timerId = setInterval(
+      internalSleep.enable,
+      preventSleep._intervalTime
+    );
+  },
+  disable: () => {
+    clearInterval(preventSleep._timerId);
+    internalSleep.disable();
+  },
+};
+
+module.exports = preventSleep;