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// Copyright (C) 2011 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.httpd.rpc.topic;

import com.google.gerrit.common.data.ApprovalTypes;
import com.google.gerrit.common.data.TopicDetail;
import com.google.gerrit.common.errors.NoSuchEntityException;
import com.google.gerrit.httpd.rpc.Handler;
import com.google.gerrit.reviewdb.ChangeSet;
import com.google.gerrit.reviewdb.ReviewDb;
import com.google.gerrit.reviewdb.Topic;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.TopicUtil;
import com.google.gerrit.server.git.MergeOp;
import com.google.gerrit.server.git.MergeQueue;
import com.google.gerrit.server.project.CanSubmitResult;
import com.google.gerrit.server.project.NoSuchChangeException;
import com.google.gerrit.server.project.NoSuchTopicException;
import com.google.gerrit.server.project.TopicControl;
import com.google.gerrit.server.workflow.TopicFunctionState;
import com.google.gwtorm.client.OrmException;
import com.google.inject.Inject;
import com.google.inject.assistedinject.Assisted;

class SubmitAction extends Handler<TopicDetail> {
  interface Factory {
    SubmitAction create(ChangeSet.Id changeSetId);
  }

  private final ReviewDb db;
  private final MergeQueue merger;
  private final ApprovalTypes approvalTypes;
  private final IdentifiedUser user;
  private final TopicDetailFactory.Factory topicDetailFactory;
  private final TopicControl.Factory topicControlFactory;
  private final TopicFunctionState.Factory topicFunctionState;
  private final MergeOp.Factory opFactory;

  private final ChangeSet.Id changeSetId;

  @Inject
  SubmitAction(final ReviewDb db, final MergeQueue mq,
      final IdentifiedUser user,
      final ApprovalTypes approvalTypes,
      final TopicDetailFactory.Factory topicDetailFactory,
      final TopicControl.Factory topicControlFactory,
      final TopicFunctionState.Factory topicFunctionState,
      final MergeOp.Factory opFactory,
      @Assisted final ChangeSet.Id changeSetId) {
    this.db = db;
    this.merger = mq;
    this.approvalTypes = approvalTypes;
    this.user = user;
    this.topicControlFactory = topicControlFactory;
    this.topicDetailFactory = topicDetailFactory;
    this.topicFunctionState = topicFunctionState;
    this.opFactory = opFactory;

    this.changeSetId = changeSetId;
  }

  @Override
  public TopicDetail call() throws OrmException, NoSuchEntityException,
      IllegalStateException, ChangeSetInfoNotAvailableException,
      NoSuchTopicException, NoSuchChangeException {

    final Topic.Id topicId = changeSetId.getParentKey();
    final TopicControl topicControl =
        topicControlFactory.validateFor(topicId);

    CanSubmitResult result = topicControl.canSubmit(db, changeSetId,
        approvalTypes, topicFunctionState);
    if (result == CanSubmitResult.OK) {
        TopicUtil.submit(changeSetId, user, db, opFactory, merger);
        return topicDetailFactory.create(topicId).call();
    } else {
      throw new IllegalStateException(result.getMessage());
    }
  }
}