Google Drive event triggers

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Requirements

• An Unstructured account, and an Unstructured API key for your account, as follows:
  1. Sign in to your Unstructured account:
     • If you do not already have an Unstructured account, go to https://unstructured.io/contact and fill out the online form to indicate your interest.
     • If you already have an Unstructured account, sign in by using the URL of the sign in page that Unstructured provided to you when your Unstructured account was created. After you sign in, the Unstructured user interface (UI) then appears, and you can start using it right away. If you do not have this URL, contact Unstructured Sales at sales@unstructured.io.
  2. Get your Unstructured API key: a. In the Unstructured UI, click API Keys on the sidebar.
     b. Click Generate API Key.
     c. Follow the on-screen instructions to finish generating the key.
     d. Click the Copy icon next to your new key to add the key to your system’s clipboard. If you lose this key, simply return and click the Copy icon again.
     
• The Unstructured Workflow Endpoint URL for your account, as follows:
  1. In the Unstructured UI, click API Keys on the sidebar.
     
  2. Note the value of the Unstructured Workflow Endpoint field.
• A Google Drive source connector in your Unstructured account. Learn how.
• Some available destination connector in your Unstructured account.
• A workflow that uses the preceding source and destination connectors. Learn how.

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Step 1: Create the Google Apps Script project

1. Sign in to your Google account.
2. Go to http://script.google.com/.
3. Click + New project.
4. Click the new project’s default name (such as Untitled project), and change it to something more descriptive, such as Unstructured ETL Scripts.

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Step 2: Add the script

1. With the project still open, on the sidebar, click the < > (Editor) icon.
2. In the Files tab, click Code.gs.
3. Replace the contents of the Code.gs file with the following code instead:
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   function checkForNewOrUpdatedFiles() {
     const folder = DriveApp.getFolderById(FOLDER_ID);
     const files = folder.getFiles();
     const now = new Date();
     const thresholdMillis = 5 * 60 * 1000; // 5 minutes (adjust as needed).
     
     while (files.hasNext()) {
       const file = files.next();
       const created = file.getDateCreated();
       const lastUpdated = file.getLastUpdated();
       const fileName = file.getName();
   
       // Calculate time differences.
       const millisSinceCreated = now - created;
       const createdWithinThreshold = millisSinceCreated < thresholdMillis;
       const millisSinceUpdated = now - lastUpdated;
       const updatedWithinThreshold = millisSinceUpdated < thresholdMillis;
   
       // Log file details and calculations.
       console.log('File Name:                       ' + fileName);
       console.log('Created:                         ' + created);
       console.log('Last updated:                    ' + lastUpdated);
       console.log('Milliseconds since created:      ' + millisSinceCreated);
       console.log('Milliseconds since last updated: ' + millisSinceUpdated);
       console.log('Created within threshold of ' + thresholdMillis + ' milliseconds? ' + createdWithinThreshold);
       console.log('Updated within threshold of ' + thresholdMillis + ' milliseconds? ' + updatedWithinThreshold);
       console.log('-----')
   
       // If at least one file was created or updated within the last 5 minutes...
       if ((createdWithinThreshold) || (updatedWithinThreshold)) {
         // ...then make the HTTP POST request.
         UrlFetchApp.fetch(UNSTRUCTURED_API_URL, {
           method: 'post',
           headers: {
             'accept': 'application/json',
             'unstructured-api-key': UNSTRUCTURED_API_KEY
           }
         });
         // Then stop the script after the first fetch (no need to check any more files).
         console.log('At least one file created or updated within threshold of ' + thresholdMillis + ' milliseconds.')
         console.log('Unstructured workflow request sent to ' + UNSTRUCTURED_API_URL)
         return;
       }
     }
     console.log('No files created or updated within threshold of ' + thresholdMillis + ' milliseconds. No Unstructured workflow request sent.')
   }
   

4. Click the Save project to Drive button.

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Step 3: Customize the script for your workflow

1. With the project still open, on the Files tab, click the Add a file button, and then click Script.
2. Name the new file Constants. The .gs extension is added automatically.
3. Replace the contents of the Constants.gs file with the following code instead:
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   const FOLDER_ID = '<folder-id>';
   const UNSTRUCTURED_API_URL = '<unstructured-api-url>' + '/workflows/<workflow-id>/run';
   const UNSTRUCTURED_API_KEY = '<unstructured-api-key>';
   

   Replace the following placeholders:
   • Replace <folder-id> with the ID of your Google Drive shared folder or shared drive. This is the same ID that you specified when you created your Google Drive source connector in your Unstructured account.
   • Replace <unstructured-api-url> with your Unstructured API URL value.
   • Replace <workflow-id> with the ID of your Unstructured workflow.
   • Replace <unstructured-api-key> with your Unstructured API key value.
4. Click the disk (Save project to Drive) icon.

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Step 4: Create the script trigger

1. With the project still open, on the sidebar, click the alarm clock (Triggers) icon.
2. Click the + Add Trigger button.
3. Set the following values:
   • For Choose which function to run, select checkForNewOrUpdatedFiles.
   • For Choose which deployment should run, select Head.
   • For Select event source, select Time-driven.
   • For Select type of time based trigger, select Minutes timer.
   • For Select minute interval, select Every 5 minutes.
     If you change Minutes timer or Every 5 minutes to a different interval, you should also go back and change the number 5 in the following line of code in the checkForNewOrUpdatedFiles function. Change the number 5 to the number of minutes that correspond to the alternate interval you selected:

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     const thresholdMillis = 5 * 60 * 1000;
     

   • For Failure notification settings, select an interval such as immediately, hourly, or daily.
4. Click Save.

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Step 5: View trigger results

1. With the project still open, on the sidebar, click the three lines (Executions) icon.
2. As soon as the first script execution completes, you should see a corresponding message appear in the Executions list. If the Status column shows Completed, then keep going with this procedure. If the Status column shows Failed, expand the message to get any details about the failure. Fix the failure, and then wait for the next script execution to complete.
3. When the Status column shows Completed then, in your Unstructured account, click Jobs on the sidebar to see if a new job is running for that worklow. If no new job is running for that workflow, then add at least one new file to—or update at least one existing file in—the Google Drive shared folder or shared drive, within 5 minutes of the next script execution. After the next script execution, check the Jobs list again.

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Step 6 (Optional): Delete the trigger

1. To stop the script from automatically executing on a regular basis, with the project still open, on the sidebar, click the alarm clock (Triggers) icon.
2. Rest your mouse pointer on the trigger you created in Step 4.
3. Click the ellipsis (three dots) icon, and then click Delete trigger.