Add Script to Migrate Emails from profiles to users collection

scripts/firebase-admin/migrateProfileEmails.ts

@@ -0,0 +1,47 @@
+import { FieldValue } from "functions/src/firebase"
+import { Script } from "./types"
+
+// Migrate emails from profiles to users collection and delete from profiles
+export const script: Script = async ({ db, auth }) => {
+  const profilesSnapshot = await db
+    .collection("profiles")
+    .where("email", ">", "")
+    .get()
+  let emailUpdateCount = 0
+
+  console.log(`Migrating emails for ${profilesSnapshot.size} profiles`)
+
+  const bulkWriter = db.bulkWriter()
+
+  for (const profileDoc of profilesSnapshot.docs) {
+    const profileData = profileDoc.data()
+    const userId = profileDoc.id
+    const email = profileData.email
+
+    if (email) {
+      const userRef = db.collection("users").doc(userId)
+      const userDoc = await userRef.get()
+      const userEmail = userDoc.exists ? userDoc.data()?.email : undefined
+
+      if (userEmail) {
+        if (userEmail !== email) {
+          console.error(
+            `Email mismatch for userId ${userId}: profile email "${email}", user email "${userEmail}"`
+          )
+        } else {
+          // Email is the same, just delete from profile collection
+          bulkWriter.update(profileDoc.ref, { email: FieldValue.delete() })
+        }
+      } else {
+        // No email in user collection, set it
+        bulkWriter.set(userRef, { email }, { merge: true })
+        bulkWriter.update(profileDoc.ref, { email: FieldValue.delete() })
+        emailUpdateCount++
+      }
+    }
+  }
+
+  await bulkWriter.close()
+
+  console.log(`Updated emails for ${emailUpdateCount} users`)
+}