add retestMarking function

cloud-functions/nodejs/functions/index.js

@@ -247,4 +247,32 @@ exports.migrateUsers = async (event, context) => {
             }
         })
     }
-};
+};
+
+
+/**
+ * Triggered by a change to a Firestore document.
+ *
+ * @param {!Object} event Event payload.
+ * @param {!Object} context Metadata for the event.
+ */
+
+const admin = require("firebase-admin");
+
+admin.initializeApp();
+
+exports.retestMarking = async (event, context) => {
+  const resource = context.resource;
+  // log out the resource string that triggered the function
+  console.log('Function triggered by change to: ' +  resource);
+  // now log the full event object
+  console.log(JSON.stringify(event));
+  const { _id, classificationResult } = event.value.fields;
+  console.log("classificationResult", classificationResult.stringValue);
+  if (classificationResult?.stringValue?.includes("Negative Borderline")) {
+    await admin.firestore().collection("patientData").where("_id", "==", _id.stringValue).update({
+      testStatus: false,
+      incubationTime: admin.firestore.FieldValue.delete()
+    });
+  }
+};