Update script to include additional functions

update script to include the following:
- globals for folder IDs and execution start timestamp
- convert console output to logger output to store output for later forwarding
- email notifications for execution start and completion with stored console log email

google-sharedrivecopy.gs

@@ -1,4 +1,14 @@
 function start() {
+
+  //global variables to facilitate logging and email
+
+  PropertiesService.getScriptProperties().setProperty('sourceFolderIdGlobal', 'xxx');
+  PropertiesService.getScriptProperties().setProperty('targetParentFolderIdGlobal', 'xxx');
+  PropertiesService.getScriptProperties().setProperty('StartTime', new Date());   //get timestamp to record the intial execution time
+
+
+
+{
   // Google App Script to the rescue
   // Code adapted from this artcile https://www.labnol.org/code/19979-copy-folders-drive
   // Thank you Amit Agarwal https://github.com/labnol
@@ -7,44 +17,64 @@ function start() {
   // If you have been driven insane by Google Drives inability to copy a folder structure from MyDrive to a Shared drive BOOM!
   // 
   // Important note: Enable the Drive service in the script editor https://developers.google.com/apps-script/advanced/drive
-
-  var sourceFolderId = "XXXX"; //Folder ID of the folder structure you want to copy
+
+
+  var sourceFolderId = PropertiesService.getScriptProperties().getProperty('sourceFolderIdGlobal'); //Folder ID of the folder structure you want to copy
   //Add target folder ID if you want the dest to be somewhere other than the root of Mydrive
-  var targetParentFolderId = "";  
+  var targetParentFolderId = PropertiesService.getScriptProperties().getProperty('targetParentFolderIdGlobal');  
 
   var sourceFolder = DriveApp.getFolderById(sourceFolderId); //Source Folder
 
   if (targetParentFolderId.length > 0 ) {
     // If the target folder ID has been provided, create the target folder within that folder
     var targetParent = DriveApp.getFolderById(targetParentFolderId); //Parent Folder (target)
-    console.log( "Create target folder: " + sourceFolder.getName() + " in " + targetParent.getName());
+    Logger.log( "Create target folder: " + sourceFolder.getName() + " in " + targetParent.getName()); //copy console entry into stored logger
     var target = targetParent.createFolder(sourceFolder.getName()); //Create the source folder we are copying
   } else {
     // If the target folder ID is empty, create the target folder within the root of Mydrive
-    console.log( "Create target folder in Mydrive: " + sourceFolder.getName());
+
+    Logger.log( "Create target folder in Mydrive: " + sourceFolder.getName()); //copy console entry into stored logger
+    Logger.log( "Create target folder in Mydrive: " + sourceFolder.getName()); //copy console entry into stored logger
     var target = DriveApp.createFolder(sourceFolder.getName()); //Create the source folder
   }
 
   //Here we go
+
+  Logger.clear; //Clear stored log data before next execution so we don't keep sending old data
+  var recipient = 'email@email.com';  //Destination email address to notify that script has started (for triggered executions)
+  var subject = 'MyDrive Copy Log';
+  var body = 'MyDrive Copy Started for folder pair: '+sourceFolderId+' to '+targetParentFolderId+"\n This script execution was started at "+ PropertiesService.getScriptProperties().getProperty('StartTime');
+  MailApp.sendEmail(recipient, subject, body);
+
+
   copyFolder(sourceFolder, target);
-  console.log("Copy finish");
+  Logger.log("Copy finish"); //copy console entry into stored logger
+
+  var recipient = 'email@email.com'; //Destination email address to send final completion notice and the logged console data
+  var subject = 'MyDrive Copy Log';
+  var body = 'MyDrive Copy finished at '+ new Date()+';'+" The execution log is as follows: \n" +Logger.getLog();
+  MailApp.sendEmail(recipient, subject, body);
+
+}
 }
 
-function copyFolder(source, target) {
 
+function copyFolder(source, target) {
   var folders = source.getFolders();
   var files   = source.getFiles();
 
+
+
   while(files.hasNext()) {
     var file = files.next();
-    console.log( "Copying file: " + file.getName());
+    Logger.log( "Copying file: " + file.getName()); //copy console entry into stored logger
     file.makeCopy(file.getName(), target);
   }
 
   while(folders.hasNext()) {
     var subFolder = folders.next();
     var folderName = subFolder.getName();
-    console.log( "Copying folder: " + folderName);
+    Logger.log( "Copying folder: " + folderName); //copy console entry into stored logger
     var targetFolder = target.createFolder(folderName);
     copyFolder(subFolder, targetFolder);
   }