text: // Licensed to the Apache Software Foundation (ASF) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The ASF licenses this file
  // to you 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.
  
  function detectISSUESID(title) {
    if (!title) {
      return null;
    }
    const matched = /^\[REMOTE-SHUFFLE-\d+\]/.exec(title);
    if (!matched) {
      return null;
    }
    const issues_number = matched[0].replace(/[^0-9]/ig,"");
    return issues_number;
  }
  
  async function haveComment(github, context, pullRequestNumber, body) {
    const options = {
      owner: context.repo.owner,
      repo: context.repo.repo,
      issue_number: pullRequestNumber,
      page: 1
    };
    while (true) {
      const response = await github.issues.listComments(options);
      if (response.data.some(comment => comment.body === body)) {
        return true;
      }
      if (!/;\s*rel="next"/.test(response.headers.link || "")) {
        break;
      }
      options.page++;
    }
    return false;
  }
  
  async function commentISSUESURL(github, context, pullRequestNumber, issuesID) {
    const issuesURL = `https://github.com/oap-project/remote-shuffle/issues/${issuesID}`;
    if (await haveComment(github, context, pullRequestNumber, issuesURL)) {
      return;
    }
    await github.issues.createComment({
      owner: context.repo.owner,
      repo: context.repo.repo,
      issue_number: pullRequestNumber,
      body: issuesURL
    });
  }
  
  module.exports = async ({github, context}) => {
    const pullRequestNumber = context.payload.number;
    const title = context.payload.pull_request.title;
    const issuesID = detectISSUESID(title);
    if (issuesID) {
      await commentISSUESURL(github, context, pullRequestNumber, issuesID);
    }
  };
  