Firestore Trigger on object detection

triggers.ts

const CLOUD_FUNCTIONS_REGION = 'us-central1'; // Your functions region here
const COLLECTION_NAME = 'detectedObjects'; // Your specified collection here

export const processDetectedObjects = functions
  .region(CLOUD_FUNCTIONS_REGION)
  .firestore.document(`${COLLECTION_NAME}/{documentID}`)
  .onCreate(async (snapshot) => {
    try {
      const objectsData = snapshot.data();

      // Return an error if no objects were detected
      if (!objectsData.objects || objectsData.objects.length === 0) {
        throw new functions.https.HttpsError(
          'unavailable',
          'No objects detected'
        );
      }

      // Get userID from the image path.
      // NOTE: This is an example for gs://[project-id]/users/[userID]/image.jpg
      const userID = objectsData.file.split('gs://')[1].split('/')[2];

      // Process objects - BASIC information mode
      const objectNames = objectsData.objects;

      // Process objects - FULL information mode
      const objectNamesWithPredictions = objectsData.objects.map(
        (object) => `${object.name}: ${object.score}`
      );

      // Your code here...

    } catch (error) {
      throw new functions.https.HttpsError(
        'internal',
        'Error processing detected objects'
      );
    }
  });