1 files changed, 116 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/query/change/ChangeIsVisibleToPredicate.java b/java/com/google/gerrit/server/query/change/ChangeIsVisibleToPredicate.java
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+++ b/java/com/google/gerrit/server/query/change/ChangeIsVisibleToPredicate.java
@@ -0,0 +1,116 @@
+// Copyright (C) 2010 The Android Open Source Project
+//
+// Licensed 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 com.google.gerrit.server.query.change;
+
+import com.google.common.flogger.FluentLogger;
+import com.google.gerrit.extensions.restapi.AuthException;
+import com.google.gerrit.index.query.IsVisibleToPredicate;
+import com.google.gerrit.reviewdb.client.Change;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.AnonymousUser;
+import com.google.gerrit.server.CurrentUser;
+import com.google.gerrit.server.index.IndexUtils;
+import com.google.gerrit.server.notedb.ChangeNotes;
+import com.google.gerrit.server.permissions.ChangePermission;
+import com.google.gerrit.server.permissions.PermissionBackend;
+import com.google.gerrit.server.permissions.PermissionBackendException;
+import com.google.gerrit.server.project.ProjectCache;
+import com.google.gerrit.server.project.ProjectState;
+import com.google.gwtorm.server.OrmException;
+import com.google.inject.Provider;
+import java.io.IOException;
+import org.eclipse.jgit.errors.RepositoryNotFoundException;
+
+public class ChangeIsVisibleToPredicate extends IsVisibleToPredicate<ChangeData> {
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
+
+  protected final Provider<ReviewDb> db;
+  protected final ChangeNotes.Factory notesFactory;
+  protected final CurrentUser user;
+  protected final PermissionBackend permissionBackend;
+  protected final ProjectCache projectCache;
+  private final Provider<AnonymousUser> anonymousUserProvider;
+
+  public ChangeIsVisibleToPredicate(
+      Provider<ReviewDb> db,
+      ChangeNotes.Factory notesFactory,
+      CurrentUser user,
+      PermissionBackend permissionBackend,
+      ProjectCache projectCache,
+      Provider<AnonymousUser> anonymousUserProvider) {
+    super(ChangeQueryBuilder.FIELD_VISIBLETO, IndexUtils.describe(user));
+    this.db = db;
+    this.notesFactory = notesFactory;
+    this.user = user;
+    this.permissionBackend = permissionBackend;
+    this.projectCache = projectCache;
+    this.anonymousUserProvider = anonymousUserProvider;
+  }
+
+  @Override
+  public boolean match(ChangeData cd) throws OrmException {
+    if (cd.fastIsVisibleTo(user)) {
+      return true;
+    }
+    Change change = cd.change();
+    if (change == null) {
+      return false;
+    }
+
+    ChangeNotes notes = notesFactory.createFromIndexedChange(change);
+
+    try {
+      ProjectState projectState = projectCache.checkedGet(cd.project());
+      if (projectState == null) {
+        logger.atFine().log("Filter out change %s of non-existing project %s", cd, cd.project());
+        return false;
+      }
+      if (!projectState.statePermitsRead()) {
+        logger.atFine().log("Filter out change %s of non-reabable project %s", cd, cd.project());
+        return false;
+      }
+    } catch (IOException e) {
+      throw new OrmException("unable to read project state", e);
+    }
+
+    PermissionBackend.WithUser withUser =
+        user.isIdentifiedUser()
+            ? permissionBackend.absentUser(user.getAccountId())
+            : permissionBackend.user(anonymousUserProvider.get());
+    try {
+      withUser.indexedChange(cd, notes).database(db).check(ChangePermission.READ);
+    } catch (PermissionBackendException e) {
+      Throwable cause = e.getCause();
+      if (cause instanceof RepositoryNotFoundException) {
+        logger.atWarning().withCause(e).log(
+            "Filter out change %s because the corresponding repository %s was not found",
+            cd, cd.project());
+        return false;
+      }
+      throw new OrmException("unable to check permissions on change " + cd.getId(), e);
+    } catch (AuthException e) {
+      logger.atFine().log("Filter out non-visisble change: %s", cd);
+      return false;
+    }
+
+    cd.cacheVisibleTo(user);
+    return true;
+  }
+
+  @Override
+  public int getCost() {
+    return 1;
+  }
+}