@polkadot/api-provider/mock/subscribe.js

'use strict';

var _regenerator = require('babel-runtime/regenerator');

var _regenerator2 = _interopRequireDefault(_regenerator);

var _asyncToGenerator2 = require('babel-runtime/helpers/asyncToGenerator');

var _asyncToGenerator3 = _interopRequireDefault(_asyncToGenerator2);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

module.exports = function () {
  var _ref = (0, _asyncToGenerator3.default)( /*#__PURE__*/_regenerator2.default.mark(function _callee(self, method, params) {
    var callback, id;
    return _regenerator2.default.wrap(function _callee$(_context) {
      while (1) {
        switch (_context.prev = _context.next) {
          case 0:
            self.l.debug(function () {
              return ['subscribe', method, params];
            });

            if (!self.subscriptions[method]) {
              _context.next = 8;
              break;
            }

            // flowlint-next-line unclear-type:off
            callback = params.pop();
            id = ++self.subscriptionId;


            self.subscriptions[method].callbacks[id] = callback;
            self.subscriptionMap[id] = method;

            callback(null, self.subscriptions[method].lastValue);

            return _context.abrupt('return', id);

          case 8:
            throw new Error('provider.subscribe: Invalid method \'' + method + '\'');

          case 9:
          case 'end':
            return _context.stop();
        }
      }
    }, _callee, this);
  }));

  function subscribe(_x, _x2, _x3) {
    return _ref.apply(this, arguments);
  }

  return subscribe;
}(); // Copyright 2017-2018 Jaco Greeff
// This software may be modified and distributed under the terms
// of the ISC license. See the LICENSE file for details.