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// Copyright (C) 2020 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.change;

import static com.google.gerrit.server.update.context.RefUpdateContext.RefUpdateType.CHANGE_MODIFICATION;

import com.google.common.base.Strings;
import com.google.gerrit.entities.Account;
import com.google.gerrit.extensions.api.changes.AttentionSetInput;
import com.google.gerrit.extensions.api.changes.NotifyHandling;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.server.account.AccountResolver;
import com.google.gerrit.server.change.AttentionSetEntryResource;
import com.google.gerrit.server.change.ChangeResource;
import com.google.gerrit.server.change.NotifyResolver;
import com.google.gerrit.server.change.RemoveFromAttentionSetOp;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gerrit.server.update.BatchUpdate;
import com.google.gerrit.server.update.UpdateException;
import com.google.gerrit.server.update.context.RefUpdateContext;
import com.google.gerrit.server.util.AttentionSetUtil;
import com.google.gerrit.server.util.time.TimeUtil;
import com.google.inject.Inject;
import java.io.IOException;
import org.eclipse.jgit.errors.ConfigInvalidException;

/** Removes a single user from the attention set. */
public class RemoveFromAttentionSet
    implements RestModifyView {
  private final BatchUpdate.Factory updateFactory;
  private final RemoveFromAttentionSetOp.Factory opFactory;
  private final AccountResolver accountResolver;
  private final NotifyResolver notifyResolver;

  @Inject
  RemoveFromAttentionSet(
      BatchUpdate.Factory updateFactory,
      RemoveFromAttentionSetOp.Factory opFactory,
      AccountResolver accountResolver,
      NotifyResolver notifyResolver) {
    this.updateFactory = updateFactory;
    this.opFactory = opFactory;
    this.accountResolver = accountResolver;
    this.notifyResolver = notifyResolver;
  }

  @Override
  public Response apply(
      AttentionSetEntryResource attentionResource, AttentionSetInput input)
      throws RestApiException, PermissionBackendException, IOException, ConfigInvalidException,
          UpdateException {
    if (input == null) {
      throw new BadRequestException("input may not be null");
    }
    input.reason = Strings.nullToEmpty(input.reason).trim();
    if (input.reason.isEmpty()) {
      throw new BadRequestException("missing field: reason");
    }
    input.user = Strings.nullToEmpty(input.user).trim();
    if (!input.user.isEmpty()) {
      Account.Id attentionUserId =
          AttentionSetUtil.resolveAccount(
              accountResolver, attentionResource.getChangeResource().getNotes(), input.user);
      if (attentionUserId.get() != attentionResource.getAccountId().get()) {
        throw new BadRequestException(
            "The field \"user\" must be empty, or must match the user specified in the URL.");
      }
    }
    ChangeResource changeResource = attentionResource.getChangeResource();
    try (RefUpdateContext ctx = RefUpdateContext.open(CHANGE_MODIFICATION)) {
      try (BatchUpdate bu =
          updateFactory.create(
              changeResource.getProject(), changeResource.getUser(), TimeUtil.now())) {
        RemoveFromAttentionSetOp op =
            opFactory.create(attentionResource.getAccountId(), input.reason, true);
        bu.addOp(changeResource.getId(), op);
        NotifyHandling notify = input.notify == null ? NotifyHandling.OWNER : input.notify;
        NotifyResolver.Result notifyResult = notifyResolver.resolve(notify, input.notifyDetails);
        bu.setNotify(notifyResult);
        bu.execute();
      }
    }
    return Response.none();
  }
}
    

    

    
            
    
            







    
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