js: Add jsapi package

js/index.js

@@ -0,0 +1,48 @@
+let callbackCounter = 0;
+function getUniqueCallbackName() {
+  return `_callback_${Date.now()}_${callbackCounter++}`;
+}
+
+function exec(command, options) {
+  if (typeof options === "undefined") {
+    options = {};
+  }
+
+  return new Promise((resolve, reject) => {
+    // Generate a unique callback function name
+    const callbackFuncName = getUniqueCallbackName();
+
+    // Define the success callback function
+    window[callbackFuncName] = (stdout, stderr) => {
+      resolve({ stdout, stderr });
+      cleanup(callbackFuncName);
+    };
+
+    // Define the failure callback function
+    const errorFuncName = callbackFuncName + "_error";
+    window[errorFuncName] = (error) => {
+      reject(error);
+      cleanup(callbackFuncName, errorFuncName);
+    };
+
+    // Cleanup function to remove the callbacks
+    function cleanup(successName, errorName = successName) {
+      delete window[successName];
+      if (errorName) {
+        delete window[errorName];
+      }
+    }
+
+    try {
+      ksu.exec(
+        command,
+        JSON.stringify(options),
+        callbackFuncName,
+        errorFuncName
+      );
+    } catch (error) {
+      reject(error);
+      cleanup(callbackFuncName, errorFuncName);
+    }
+  });
+}