react-say/lib/createSynthesize.js

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"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = createSynthesize;

var _regenerator = _interopRequireDefault(require("@babel/runtime/regenerator"));

var _toConsumableArray2 = _interopRequireDefault(require("@babel/runtime/helpers/toConsumableArray"));

var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));

var _QueuedUtterance = _interopRequireDefault(require("./QueuedUtterance"));

function createSynthesize() {
  var queueWithCurrent = [];
  var running;

  var run = /*#__PURE__*/function () {
    var _ref = (0, _asyncToGenerator2["default"])( /*#__PURE__*/_regenerator["default"].mark(function _callee2() {
      return _regenerator["default"].wrap(function _callee2$(_context2) {
        while (1) {
          switch (_context2.prev = _context2.next) {
            case 0:
              if (!running) {
                _context2.next = 2;
                break;
              }

              return _context2.abrupt("return");

            case 2:
              running = true;
              _context2.prev = 3;
              return _context2.delegateYield( /*#__PURE__*/_regenerator["default"].mark(function _callee() {
                var queuedUtterance;
                return _regenerator["default"].wrap(function _callee$(_context) {
                  while (1) {
                    switch (_context.prev = _context.next) {
                      case 0:
                        if (!(queuedUtterance = queueWithCurrent[0])) {
                          _context.next = 12;
                          break;
                        }

                        _context.prev = 1;
                        _context.next = 4;
                        return queuedUtterance.speak();

                      case 4:
                        _context.next = 9;
                        break;

                      case 6:
                        _context.prev = 6;
                        _context.t0 = _context["catch"](1);
                        // TODO: If the error is due to Safari restriction on user touch
                        //       The next loop on the next audio will also fail because it was not queued with a user touch
                        _context.t0.message !== 'cancelled' && console.error(_context.t0);

                      case 9:
                        queueWithCurrent = queueWithCurrent.filter(function (target) {
                          return target !== queuedUtterance;
                        });
                        _context.next = 0;
                        break;

                      case 12:
                      case "end":
                        return _context.stop();
                    }
                  }
                }, _callee, null, [[1, 6]]);
              })(), "t0", 5);

            case 5:
              _context2.prev = 5;
              running = false;
              return _context2.finish(5);

            case 8:
            case "end":
              return _context2.stop();
          }
        }
      }, _callee2, null, [[3,, 5, 8]]);
    }));

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

  return function (ponyfill, utterance) {
    var _ref2 = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {},
        onEnd = _ref2.onEnd,
        onError = _ref2.onError,
        onStart = _ref2.onStart;

    if (!(utterance instanceof ponyfill.SpeechSynthesisUtterance)) {
      throw new Error('utterance must be instance of the ponyfill');
    }

    var queuedUtterance = new _QueuedUtterance["default"](ponyfill, utterance, {
      onEnd: onEnd,
      onError: onError,
      onStart: onStart
    });
    queueWithCurrent = [].concat((0, _toConsumableArray2["default"])(queueWithCurrent), [queuedUtterance]);
    run();
    return {
      // The cancel() function returns a Promise
      cancel: function cancel() {
        return queuedUtterance.cancel();
      },
      promise: queuedUtterance.promise
    };
  };
}
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