1 files changed, 144 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/query/change/EqualsLabelPredicate.java b/java/com/google/gerrit/server/query/change/EqualsLabelPredicate.java
new file mode 100644
index 0000000000..54e22f328d
--- /dev/null
+++ b/java/com/google/gerrit/server/query/change/EqualsLabelPredicate.java
@@ -0,0 +1,144 @@
+// Copyright (C) 2013 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.gerrit.common.data.LabelType;
+import com.google.gerrit.common.data.LabelTypes;
+import com.google.gerrit.extensions.restapi.AuthException;
+import com.google.gerrit.reviewdb.client.Account;
+import com.google.gerrit.reviewdb.client.AccountGroup;
+import com.google.gerrit.reviewdb.client.Change;
+import com.google.gerrit.reviewdb.client.PatchSetApproval;
+import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.IdentifiedUser;
+import com.google.gerrit.server.index.change.ChangeField;
+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;
+
+public class EqualsLabelPredicate extends ChangeIndexPredicate {
+  protected final ProjectCache projectCache;
+  protected final PermissionBackend permissionBackend;
+  protected final IdentifiedUser.GenericFactory userFactory;
+  protected final Provider<ReviewDb> dbProvider;
+  protected final String label;
+  protected final int expVal;
+  protected final Account.Id account;
+  protected final AccountGroup.UUID group;
+
+  public EqualsLabelPredicate(
+      LabelPredicate.Args args, String label, int expVal, Account.Id account) {
+    super(ChangeField.LABEL, ChangeField.formatLabel(label, expVal, account));
+    this.permissionBackend = args.permissionBackend;
+    this.projectCache = args.projectCache;
+    this.userFactory = args.userFactory;
+    this.dbProvider = args.dbProvider;
+    this.group = args.group;
+    this.label = label;
+    this.expVal = expVal;
+    this.account = account;
+  }
+
+  @Override
+  public boolean match(ChangeData object) throws OrmException {
+    Change c = object.change();
+    if (c == null) {
+      // The change has disappeared.
+      //
+      return false;
+    }
+
+    ProjectState project = projectCache.get(c.getDest().getParentKey());
+    if (project == null) {
+      // The project has disappeared.
+      //
+      return false;
+    }
+
+    LabelType labelType = type(project.getLabelTypes(), label);
+    if (labelType == null) {
+      return false; // Label is not defined by this project.
+    }
+
+    boolean hasVote = false;
+    for (PatchSetApproval p : object.currentApprovals()) {
+      if (labelType.matches(p)) {
+        hasVote = true;
+        if (match(object, p.getValue(), p.getAccountId())) {
+          return true;
+        }
+      }
+    }
+
+    if (!hasVote && expVal == 0) {
+      return true;
+    }
+
+    return false;
+  }
+
+  protected static LabelType type(LabelTypes types, String toFind) {
+    if (types.byLabel(toFind) != null) {
+      return types.byLabel(toFind);
+    }
+
+    for (LabelType lt : types.getLabelTypes()) {
+      if (toFind.equalsIgnoreCase(lt.getName())) {
+        return lt;
+      }
+    }
+    return null;
+  }
+
+  protected boolean match(ChangeData cd, short value, Account.Id approver) {
+    if (value != expVal) {
+      return false;
+    }
+
+    if (account != null && !account.equals(approver)) {
+      return false;
+    }
+
+    IdentifiedUser reviewer = userFactory.create(approver);
+    if (group != null && !reviewer.getEffectiveGroups().contains(group)) {
+      return false;
+    }
+
+    // Check the user has 'READ' permission.
+    try {
+      PermissionBackend.ForChange perm =
+          permissionBackend.absentUser(approver).database(dbProvider).change(cd);
+      ProjectState projectState = projectCache.checkedGet(cd.project());
+      if (projectState == null || !projectState.statePermitsRead()) {
+        return false;
+      }
+
+      perm.check(ChangePermission.READ);
+      return true;
+    } catch (PermissionBackendException | IOException | AuthException e) {
+      return false;
+    }
+  }
+
+  @Override
+  public int getCost() {
+    return 1 + (group == null ? 0 : 1);
+  }
+}