chore(code.angularjs): delete old zip files on snapshot

Author: Narretz

scripts/code.angularjs.org-firebase/functions/index.js

@@ -169,4 +169,40 @@ function sendStoredFile(request, response) {
   }
 }
 
+function deleteOldSnapshotZip(event) {
+  const object = event.data;
+
+  const bucketId = object.bucket;
+  const filePath = object.name;
+  const contentType = object.contentType;
+  const resourceState = object.resourceState;
+
+  const bucket = gcs.bucket(bucketId);
+
+  if (contentType !== 'application/zip' ||
+      !filePath.startsWith('snapshot/') ||
+      resourceState === 'not_exists' // Deletion event
+    ) {
+    return;
+  }
+
+  bucket.getFiles({
+    prefix: 'snapshot/',
+    delimiter: '/',
+    autoPaginate: false
+  }).then(function(data) {
+    const files = data[0];
+
+    const oldZipFiles = files.filter(file => {
+      return file.metadata.name !== filePath && file.metadata.contentType === 'application/zip';
+    });
+
+    oldZipFiles.forEach(function(file) {
+      file.delete();
+    });
+
+  });
+}
+
 exports.sendStoredFile = functions.https.onRequest(sendStoredFile);
+exports.deleteOldSnapshotZip = functions.storage.object().onChange(deleteOldSnapshotZip);