Neilk1021 commented on code in PR #7055:
URL: https://github.com/apache/texera/pull/7055#discussion_r3715323262


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amber/src/main/scala/org/apache/texera/web/resource/auth/ExternalAuthProvisioner.scala:
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@@ -0,0 +1,185 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.texera.web.resource.auth
+
+import com.typesafe.scalalogging.LazyLogging
+import org.apache.texera.dao.SqlServer
+import org.apache.texera.dao.jooq.generated.Tables.{AUTH_PROVIDER, USER}
+import org.apache.texera.dao.jooq.generated.enums.{ProviderTypeEnum, 
UserRoleEnum}
+import org.apache.texera.dao.jooq.generated.tables.daos.{AuthProviderDao, 
UserDao}
+import org.apache.texera.dao.jooq.generated.tables.pojos.{AuthProvider, User}
+import org.jooq.DSLContext
+
+import java.time.OffsetDateTime
+import javax.ws.rs.NotAuthorizedException
+import scala.util.chaining.scalaUtilChainingOps
+
+/**
+  * A verified external identity (Google, Facebook, ...) reduced to the fields 
we
+  * persist. `avatar` is optional: `None` means the provider supplies no 
avatar, so
+  * the user's existing avatar column is left untouched rather than 
overwritten.
+  *
+  * `emailVerified` reports whether the provider itself vouches for `email`. 
It has no
+  * default on purpose: an email address is what links an external identity to 
an
+  * existing account, so treating an unverified one as trusted is an 
account-takeover
+  * path, and a defaulted flag is how that mistake comes back.
+  */
+final case class ExternalProfile(
+    providerType: ProviderTypeEnum,
+    providerId: String,
+    name: String,
+    email: String,
+    emailVerified: Boolean,
+    avatar: Option[String] = None
+)
+
+object ExternalAuthProvisioner extends LazyLogging {
+
+  /**
+    * Resolve the user behind an external identity, creating one if necessary, 
and
+    * ensure its auth-provider row is present and up to date. Runs in a single
+    * transaction and returns the (possibly newly created) user.
+    */
+  def loginOrProvision(profile: ExternalProfile): User =
+    SqlServer.withTransaction(SqlServer.getInstance().createDSLContext()) { 
ctx =>
+      val txUserDao = new UserDao(ctx.configuration())
+      val txAuthDao = new AuthProviderDao(ctx.configuration())
+
+      Option(
+        ctx
+          .select()
+          .from(USER)
+          .join(AUTH_PROVIDER)
+          .on(USER.UID.eq(AUTH_PROVIDER.UID))
+          .where(AUTH_PROVIDER.PROVIDER_TYPE.eq(profile.providerType))
+          .and(AUTH_PROVIDER.PROVIDER_ID.eq(profile.providerId))
+          .fetchOne()
+      ) match {
+        case Some(record) =>
+          // known identity: refresh the profile fields if they drifted
+          txUserDao.fetchOneByUid(record.get(USER.UID)).tap { user =>
+            if (refresh(user, profile)) txUserDao.update(user)
+          }
+
+        case None =>
+          // First time we have seen this identity, so the email address is 
the only thing
+          // tying it to an account. It is either an existing one to link 
onto, or a new row that
+          // claims the address. Trusting an unverified address for that lets 
anyone who can
+          // mint an `email` claim take over, or squat on, someone else's 
account. The error
+          // is deliberately the same one a bad credential yields, so this 
does not become an
+          // oracle for which addresses are registered.
+          if (!profile.emailVerified) {
+            logger.warn(
+              s"Refusing to provision ${profile.providerType} identity 
${profile.providerId}: " +
+                "the provider did not verify its email address."
+            )
+            throw new NotAuthorizedException("Login credentials are 
incorrect.")
+          }
+
+          val user = Option(txUserDao.fetchOneByEmail(profile.email)) match {
+            case Some(existing) =>
+              existing.tap { user =>
+                if (refresh(user, profile)) txUserDao.update(user)
+              }
+            case None =>
+              new User().tap { user =>
+                user.setName(profile.name)
+                user.setEmail(profile.email)
+                profile.avatar.foreach(user.setAvatar)
+                user.setRole(UserRoleEnum.INACTIVE)
+                txUserDao.insert(user)
+              }

Review Comment:
   Used autofix suggestion



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