1 files changed, 117 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/restapi/group/DeleteSubgroups.java b/java/com/google/gerrit/server/restapi/group/DeleteSubgroups.java
new file mode 100644
index 0000000000..c486af402f
--- /dev/null
+++ b/java/com/google/gerrit/server/restapi/group/DeleteSubgroups.java
@@ -0,0 +1,117 @@
+// 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.restapi.group;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Sets;
+import com.google.gerrit.common.data.GroupDescription;
+import com.google.gerrit.common.errors.NoSuchGroupException;
+import com.google.gerrit.extensions.restapi.AuthException;
+import com.google.gerrit.extensions.restapi.MethodNotAllowedException;
+import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
+import com.google.gerrit.extensions.restapi.Response;
+import com.google.gerrit.extensions.restapi.RestModifyView;
+import com.google.gerrit.extensions.restapi.UnprocessableEntityException;
+import com.google.gerrit.reviewdb.client.AccountGroup;
+import com.google.gerrit.server.UserInitiated;
+import com.google.gerrit.server.account.GroupControl;
+import com.google.gerrit.server.group.GroupResolver;
+import com.google.gerrit.server.group.GroupResource;
+import com.google.gerrit.server.group.SubgroupResource;
+import com.google.gerrit.server.group.db.GroupsUpdate;
+import com.google.gerrit.server.group.db.InternalGroupUpdate;
+import com.google.gerrit.server.restapi.group.AddSubgroups.Input;
+import com.google.gwtorm.server.OrmException;
+import com.google.inject.Inject;
+import com.google.inject.Provider;
+import com.google.inject.Singleton;
+import java.io.IOException;
+import java.util.HashSet;
+import java.util.Set;
+import org.eclipse.jgit.errors.ConfigInvalidException;
+
+@Singleton
+public class DeleteSubgroups implements RestModifyView<GroupResource, Input> {
+  private final GroupResolver groupResolver;
+  private final Provider<GroupsUpdate> groupsUpdateProvider;
+
+  @Inject
+  DeleteSubgroups(
+      GroupResolver groupResolver, @UserInitiated Provider<GroupsUpdate> groupsUpdateProvider) {
+    this.groupResolver = groupResolver;
+    this.groupsUpdateProvider = groupsUpdateProvider;
+  }
+
+  @Override
+  public Response<?> apply(GroupResource resource, Input input)
+      throws AuthException, NotInternalGroupException, UnprocessableEntityException, OrmException,
+          ResourceNotFoundException, IOException, ConfigInvalidException {
+    GroupDescription.Internal internalGroup =
+        resource.asInternalGroup().orElseThrow(NotInternalGroupException::new);
+    input = Input.init(input);
+
+    final GroupControl control = resource.getControl();
+    if (!control.canRemoveGroup()) {
+      throw new AuthException(
+          String.format("Cannot delete groups from group %s", internalGroup.getName()));
+    }
+
+    Set<AccountGroup.UUID> subgroupsToRemove = new HashSet<>();
+    for (String subgroupIdentifier : input.groups) {
+      GroupDescription.Basic subgroup = groupResolver.parse(subgroupIdentifier);
+      subgroupsToRemove.add(subgroup.getGroupUUID());
+    }
+
+    AccountGroup.UUID groupUuid = internalGroup.getGroupUUID();
+    try {
+      removeSubgroups(groupUuid, subgroupsToRemove);
+    } catch (NoSuchGroupException e) {
+      throw new ResourceNotFoundException(String.format("Group %s not found", groupUuid));
+    }
+
+    return Response.none();
+  }
+
+  private void removeSubgroups(
+      AccountGroup.UUID parentGroupUuid, Set<AccountGroup.UUID> removedSubgroupUuids)
+      throws OrmException, NoSuchGroupException, IOException, ConfigInvalidException {
+    InternalGroupUpdate groupUpdate =
+        InternalGroupUpdate.builder()
+            .setSubgroupModification(
+                subgroupUuids -> Sets.difference(subgroupUuids, removedSubgroupUuids))
+            .build();
+    groupsUpdateProvider.get().updateGroup(parentGroupUuid, groupUpdate);
+  }
+
+  @Singleton
+  public static class DeleteSubgroup implements RestModifyView<SubgroupResource, Input> {
+
+    private final Provider<DeleteSubgroups> delete;
+
+    @Inject
+    public DeleteSubgroup(Provider<DeleteSubgroups> delete) {
+      this.delete = delete;
+    }
+
+    @Override
+    public Response<?> apply(SubgroupResource resource, Input input)
+        throws AuthException, MethodNotAllowedException, UnprocessableEntityException, OrmException,
+            ResourceNotFoundException, IOException, ConfigInvalidException {
+      AddSubgroups.Input in = new AddSubgroups.Input();
+      in.groups = ImmutableList.of(resource.getMember().get());
+      return delete.get().apply(resource, in);
+    }
+  }
+}