chore: skip unchanged docs

Author: pr-Mais

extensions/firestore-huggingface-inference-api/functions/src/index.ts

@@ -3,9 +3,9 @@ import * as functions from 'firebase-functions';
 import config from './config';
 
 import {
-  InferenceOutputError,
-  HfInferenceEndpoint,
   HfInference,
+  HfInferenceEndpoint,
+  InferenceOutputError,
 } from '@huggingface/inference';
 import { runInference } from './inference';
 
@@ -21,6 +21,11 @@ export const triggerInference = functions.firestore
         return;
       }
 
+      if (snapshot.after.isEqual(snapshot.before)) {
+        functions.logger.info('Document have not changed, skipping inference');
+        return;
+      }
+
       let inference: HfInference | HfInferenceEndpoint;
 
       if (config.inferenceEndpoint) {