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// Copyright (C) 2017 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.permissions;

import com.google.gerrit.extensions.api.access.CoreOrPluginProjectPermission;
import com.google.gerrit.extensions.api.access.GlobalOrPluginPermission;
import com.google.gerrit.extensions.conditions.BooleanCondition;
import com.google.gerrit.extensions.conditions.PrivateInternals_BooleanCondition;
import com.google.gerrit.server.CurrentUser;
import java.util.Objects;

/** {@link BooleanCondition} to evaluate a permission. */
public abstract class PermissionBackendCondition
    extends PrivateInternals_BooleanCondition.SubclassOnlyInCoreServer {
  Boolean value;

  /**
   * Assign a specific {@code testOrFalse} result to this condition.
   *
   * 

By setting the condition to a specific value the condition will bypass calling {@link * PermissionBackend} during {@code value()}, and immediately return the set value instead. * * @param val value to return from {@code value()}. */ public void set(boolean val) { value = val; } @Override public abstract String toString(); @Override public boolean evaluatesTrivially() { // PermissionBackendCondition needs to contact PermissionBackend so trivial evaluation is not // possible. return false; } @Override public BooleanCondition reduce() { // No reductions can be made return this; } public static class WithUser extends PermissionBackendCondition { private final PermissionBackend.WithUser impl; private final GlobalOrPluginPermission perm; private final CurrentUser user; public WithUser( PermissionBackend.WithUser impl, GlobalOrPluginPermission perm, CurrentUser user) { this.impl = impl; this.perm = perm; this.user = user; } public PermissionBackend.WithUser withUser() { return impl; } public GlobalOrPluginPermission permission() { return perm; } @Override public boolean value() { return value != null ? value : impl.testOrFalse(perm); } @Override public String toString() { return "PermissionBackendCondition.WithUser(" + perm + ")"; } @Override public int hashCode() { return Objects.hash(perm, hashForUser(user)); } @Override public boolean equals(Object obj) { if (!(obj instanceof WithUser)) { return false; } WithUser other = (WithUser) obj; return Objects.equals(perm, other.perm) && usersAreEqual(user, other.user); } } public static class ForProject extends PermissionBackendCondition { private final PermissionBackend.ForProject impl; private final CoreOrPluginProjectPermission perm; private final CurrentUser user; public ForProject( PermissionBackend.ForProject impl, CoreOrPluginProjectPermission perm, CurrentUser user) { this.impl = impl; this.perm = perm; this.user = user; } public PermissionBackend.ForProject project() { return impl; } public CoreOrPluginProjectPermission permission() { return perm; } @Override public boolean value() { return value != null ? value : impl.testOrFalse(perm); } @Override public String toString() { return "PermissionBackendCondition.ForProject(" + perm + ")"; } @Override public int hashCode() { return Objects.hash(perm, impl.resourcePath(), hashForUser(user)); } @Override public boolean equals(Object obj) { if (!(obj instanceof ForProject)) { return false; } ForProject other = (ForProject) obj; return Objects.equals(perm, other.perm) && Objects.equals(impl.resourcePath(), other.impl.resourcePath()) && usersAreEqual(user, other.user); } } public static class ForRef extends PermissionBackendCondition { private final PermissionBackend.ForRef impl; private final RefPermission perm; private final CurrentUser user; public ForRef(PermissionBackend.ForRef impl, RefPermission perm, CurrentUser user) { this.impl = impl; this.perm = perm; this.user = user; } public PermissionBackend.ForRef ref() { return impl; } public RefPermission permission() { return perm; } @Override public boolean value() { return value != null ? value : impl.testOrFalse(perm); } @Override public String toString() { return "PermissionBackendCondition.ForRef(" + perm + ")"; } @Override public int hashCode() { return Objects.hash(perm, impl.resourcePath(), hashForUser(user)); } @Override public boolean equals(Object obj) { if (!(obj instanceof ForRef)) { return false; } ForRef other = (ForRef) obj; return Objects.equals(perm, other.perm) && Objects.equals(impl.resourcePath(), other.impl.resourcePath()) && usersAreEqual(user, other.user); } } public static class ForChange extends PermissionBackendCondition { private final PermissionBackend.ForChange impl; private final ChangePermissionOrLabel perm; private final CurrentUser user; public ForChange( PermissionBackend.ForChange impl, ChangePermissionOrLabel perm, CurrentUser user) { this.impl = impl; this.perm = perm; this.user = user; } public PermissionBackend.ForChange change() { return impl; } public ChangePermissionOrLabel permission() { return perm; } @Override public boolean value() { return value != null ? value : impl.testOrFalse(perm); } @Override public String toString() { return "PermissionBackendCondition.ForChange(" + perm + ")"; } @Override public int hashCode() { return Objects.hash(perm, impl.resourcePath(), hashForUser(user)); } @Override public boolean equals(Object obj) { if (!(obj instanceof ForChange)) { return false; } ForChange other = (ForChange) obj; return Objects.equals(perm, other.perm) && Objects.equals(impl.resourcePath(), other.impl.resourcePath()) && usersAreEqual(user, other.user); } } private static int hashForUser(CurrentUser user) { if (!user.isIdentifiedUser()) { return 0; } return user.getAccountId().get(); } private static boolean usersAreEqual(CurrentUser user1, CurrentUser user2) { if (user1.isIdentifiedUser() && user2.isIdentifiedUser()) { return user1.getAccountId().equals(user2.getAccountId()); } return false; } }





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