Add cloud provider APIs for deleting and renaming cloud variables. Remove...

Add cloud provider APIs for deleting and renaming cloud variables. Remove dataIndex from writeToServer function since it is not used.

src/lib/cloud-provider.js

@@ -113,10 +113,9 @@ class CloudProvider {
      * @param {string} methodName The message method, indicating the action to perform.
      * @param {string} dataName The name of the cloud variable this message pertains to
      * @param {string | number} dataValue The value to set the cloud variable to
-     * @param {number} dataIndex The index of the item to update (for cloud lists)
      * @param {string} dataNewName The new name for the cloud variable (if renaming)
      */
-    writeToServer (methodName, dataName, dataValue, dataIndex, dataNewName) {
+    writeToServer (methodName, dataName, dataValue, dataNewName) {
         const msg = {};
         msg.method = methodName;
         msg.user = this.username;
@@ -127,8 +126,7 @@ class CloudProvider {
         if (dataNewName) msg.new_name = dataNewName;
 
         // Optional number params need different undefined check
-        if (typeof dataValue !== 'undefined') msg.value = dataValue;
-        if (typeof dataValue !== 'undefined') msg.index = dataIndex;
+        if (typeof dataValue !== 'undefined' && dataValue !== null) msg.value = dataValue;
 
         const dataToWrite = JSON.stringify(msg);
         this.sendCloudData(dataToWrite);
@@ -163,6 +161,25 @@ class CloudProvider {
         this.writeToServer('set', name, value);
     }
 
+    /**
+     * Provides an API for the VM's cloud IO device to rename
+     * a cloud variable on the server.
+     * @param {string} oldName The old name of the variable to rename
+     * @param {string} newName The new name for the cloud variable.
+     */
+    renameVariable (oldName, newName) {
+        this.writeToServer('rename', oldName, null, newName);
+    }
+
+    /**
+     * Provides an API for the VM's cloud IO device to delete
+     * a cloud variable on the server.
+     * @param {string} name The name of the variable to delete
+     */
+    deleteVariable (name) {
+        this.writeToServer('delete', name);
+    }
+
     /**
      * Closes the connection to the web socket and clears the cloud
      * provider of references related to the cloud data project.