github-api-transactional/index.es.js

A transactions addon for the Github.js javascript SDK

import _regeneratorRuntime from 'babel-runtime/regenerator';
import _asyncToGenerator from 'babel-runtime/helpers/asyncToGenerator';
import _classCallCheck from 'babel-runtime/helpers/classCallCheck';
import _createClass from 'babel-runtime/helpers/createClass';

var uuid = require('uuid/v4');

var Transaction = function () {

  /**
   *
   * @param repository
   * @param parentBranch
   */
  function Transaction(repository) {
    var parentBranch = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'master';

    _classCallCheck(this, Transaction);

    this.branch = null;
    this.sha = null;
    this.ref = null;
    this.lastCommit = null;
    this.elapsedSteps = 0;
    this.mergedSha = null;

    this.repository = repository;
    this.parentBranch = parentBranch;
  }

  /**
   *
   * @return {Promise<void>}
   * @private
   */


  _createClass(Transaction, [{
    key: '_prepareBranch',
    value: function () {
      var _ref = _asyncToGenerator( /*#__PURE__*/_regeneratorRuntime.mark(function _callee() {
        var branchName, response;
        return _regeneratorRuntime.wrap(function _callee$(_context) {
          while (1) {
            switch (_context.prev = _context.next) {
              case 0:
                branchName = 'trxn-' + uuid();
                _context.next = 3;
                return this.repository.createBranch(this.parentBranch, branchName);

              case 3:
                response = _context.sent;

                this.branch = branchName;
                this.ref = response.data.ref;
                this.sha = response.data.sha;

              case 7:
              case 'end':
                return _context.stop();
            }
          }
        }, _callee, this);
      }));

      function _prepareBranch() {
        return _ref.apply(this, arguments);
      }

      return _prepareBranch;
    }()

    /**
     *
     * @param executor
     * @return {Promise}
     */

  }, {
    key: 'step',
    value: function () {
      var _ref2 = _asyncToGenerator( /*#__PURE__*/_regeneratorRuntime.mark(function _callee2(executor) {
        return _regeneratorRuntime.wrap(function _callee2$(_context2) {
          while (1) {
            switch (_context2.prev = _context2.next) {
              case 0:
                if (this.branch) {
                  _context2.next = 3;
                  break;
                }

                _context2.next = 3;
                return this._prepareBranch();

              case 3:
                _context2.next = 5;
                return executor(this.branch, this.ref, this.sha, ++this.elapsedSteps);

              case 5:
                return _context2.abrupt('return', _context2.sent);

              case 6:
              case 'end':
                return _context2.stop();
            }
          }
        }, _callee2, this);
      }));

      function step(_x2) {
        return _ref2.apply(this, arguments);
      }

      return step;
    }()

    /**
     *
     * @return {Promise}
     */

  }, {
    key: 'discard',
    value: function () {
      var _ref3 = _asyncToGenerator( /*#__PURE__*/_regeneratorRuntime.mark(function _callee3() {
        return _regeneratorRuntime.wrap(function _callee3$(_context3) {
          while (1) {
            switch (_context3.prev = _context3.next) {
              case 0:
                if (!this.branch) {
                  _context3.next = 6;
                  break;
                }

                _context3.next = 3;
                return this.repository.deleteRef(this.ref);

              case 3:
                this.branch = null;
                this.ref = null;
                this.sha = null;

              case 6:
              case 'end':
                return _context3.stop();
            }
          }
        }, _callee3, this);
      }));

      function discard() {
        return _ref3.apply(this, arguments);
      }

      return discard;
    }()

    /**
     *
     * @return {Promise}
     */

  }, {
    key: 'commit',
    value: function () {
      var _ref4 = _asyncToGenerator( /*#__PURE__*/_regeneratorRuntime.mark(function _callee4() {
        var transactionPullRequest, baseSha;
        return _regeneratorRuntime.wrap(function _callee4$(_context4) {
          while (1) {
            switch (_context4.prev = _context4.next) {
              case 0:
                _context4.next = 2;
                return this.repository.createPullRequest({
                  head: this.branch,
                  base: this.parentBranch,
                  title: '[Auto] Transaction: ' + this.branch,
                  maintainer_can_modify: false
                }).data;

              case 2:
                transactionPullRequest = _context4.sent;
                _context4.next = 5;
                return this.repository.getBranch(this.parentBranch);

              case 5:
                baseSha = _context4.sent.commit.sha;
                _context4.next = 8;
                return this.repository.mergePullRequest(transactionPullRequest.id, {
                  commit_title: '[Auto] Transaction: ' + this.branch,
                  merge_method: 'squash',
                  sha: baseSha
                });

              case 8:
                this.mergedSha = _context4.sent.data.sha;
                _context4.next = 11;
                return this.repository.deleteRef(this.ref);

              case 11:
              case 'end':
                return _context4.stop();
            }
          }
        }, _callee4, this);
      }));

      function commit() {
        return _ref4.apply(this, arguments);
      }

      return commit;
    }()

    /**
     *
     * @return {Promise}
     */

  }, {
    key: 'rollback',
    value: function () {
      var _ref5 = _asyncToGenerator( /*#__PURE__*/_regeneratorRuntime.mark(function _callee5() {
        return _regeneratorRuntime.wrap(function _callee5$(_context5) {
          while (1) {
            switch (_context5.prev = _context5.next) {
              case 0:
                throw new Error('GitHub API does not support reverting. Use GitHub UI or command line to revert. Merge commit SHA: ' + this.mergedSha + '.');

              case 1:
              case 'end':
                return _context5.stop();
            }
          }
        }, _callee5, this);
      }));

      function rollback() {
        return _ref5.apply(this, arguments);
      }

      return rollback;
    }()
  }]);

  return Transaction;
}();

export { Transaction };
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