zarm-mobile/lib/Lottery/index.js

UI for react.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

var _classnames = require('classnames');

var _classnames2 = _interopRequireDefault(_classnames);

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

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var finished = true;
var angle = 0;
var error = false;
var flag = true;

function _getRandom(min, max) {
  // 参数min为随机数最小值 max为随机数最大值 得到的随机数范围为[min,max]
  return Math.floor(Math.random() * (max + 1 - min) + min);
}

function _addListenerMulti(el, s, fn) {
  var evts = s.split(' ');
  for (var i = 0, iLen = evts.length; i < iLen; i += 1) {
    el.addEventListener(evts[i], fn, false);
  }
}

var Lottery = function (_Component) {
  _inherits(Lottery, _Component);

  function Lottery(props) {
    _classCallCheck(this, Lottery);

    var _this = _possibleConstructorReturn(this, (Lottery.__proto__ || Object.getPrototypeOf(Lottery)).call(this, props));

    _this.state = {
      gift: '',
      isStart: props.isStart || false
    };

    _this.num = props.option.length;
    _this._transitionend = _this._transitionend.bind(_this);
    return _this;
  }

  _createClass(Lottery, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      _addListenerMulti(this.rotateArea, 'webkitTransitionEnd transitionend', this._transitionend);
    }
  }, {
    key: 'componentWillReceiveProps',
    value: function componentWillReceiveProps(nextProps) {
      if (!nextProps.isStart) {
        flag = true;
        return;
      }
      this.num = nextProps.option.length;
      this.onStart(nextProps.value);
    }
  }, {
    key: 'componentWillUnmount',
    value: function componentWillUnmount() {
      finished = true;
      flag = true;
    }

    // 完成

  }, {
    key: 'onComplete',
    value: function onComplete(name) {
      this.setState({ isStart: false });
      this.props.onComplete(name);
    }

    // 开始

  }, {
    key: 'onStart',
    value: function onStart(value) {
      var _this2 = this;

      this.setState({ isStart: true });

      var res = this._findIndexOfArr(value);
      if (res.length === 0) {
        error = true;
        this._runLottery(0.5);
        return;
      }

      this.props.option.forEach(function (item, index) {
        if (item.id === res[0].id) {
          error = false;
          _this2.setState({
            gift: res[0].name
          });
          _this2._runLottery(index + 1);
        }
      });
    }

    // 出错

  }, {
    key: 'onError',
    value: function onError() {
      this.setState({ isStart: false });
      this.props.onError();
    }
  }, {
    key: '_findIndexOfArr',
    value: function _findIndexOfArr(id) {
      return this.props.option.filter(function (obj) {
        return obj.id === id;
      });
    }
  }, {
    key: '_runLottery',
    value: function _runLottery(index) {
      if (!finished) {
        return false;
      }
      finished = false;
      angle = _getRandom(4, 6) * 360 - 360 / ('' + this.num) * ('' + (index - 0.5));

      this.rotateArea.style.webkitTransform = 'rotate(' + angle + 'deg)';
      this.rotateArea.style.webkitTransition = this.props.duration + 's';
      this.rotateArea.style.transform = 'rotate(' + angle + 'deg)';
      this.rotateArea.style.transition = this.props.duration + 's';
    }

    // 监听动画执行完成

  }, {
    key: '_transitionend',
    value: function _transitionend() {
      this.rotateArea.style.transform = 'rotate(' + angle % 360 + 'deg)';
      this.rotateArea.style.transition = '0s';
      finished = true;
      flag = true;
      error ? this.onError() : this.onComplete(this.state.gift);
    }
  }, {
    key: 'render',
    value: function render() {
      var _this3 = this;

      var cls = (0, _classnames2.default)({
        'rotate-area': 'true'
      });

      var rotateItem = [];

      for (var i = 1; i <= this.num; i += 1) {
        rotateItem.push(_react2.default.createElement('div', {
          key: i,
          style: {
            backgroundImage: 'url(' + this.props.option[i - 1].image + ')',
            WebkitTransform: 'rotate(' + 360 / this.num * (i - 0.5) + 'deg)',
            transform: 'rotate(' + 360 / this.num * (i - 0.5) + 'deg)'
          },
          className: 'award-item award-item' + i
        }));
      }

      return _react2.default.createElement(
        'div',
        { className: 'za-lottery' },
        _react2.default.createElement(
          'div',
          { className: cls, ref: function ref(rotateArea) {
              _this3.rotateArea = rotateArea;
            }, style: { backgroundImage: 'url(' + this.props.bgUrl + ')' } },
          rotateItem
        ),
        _react2.default.createElement('div', {
          className: 'za-lottery-btn',
          style: { backgroundImage: 'url(' + this.props.btnUrl + ')' },
          onClick: function onClick() {
            if (!flag) return;
            flag = false;
            _this3.props.onStart();
          }
        })
      );
    }
  }]);

  return Lottery;
}(_react.Component);

Lottery.propTypes = {
  option: _propTypes2.default.arrayOf(_propTypes2.default.object),
  duration: _propTypes2.default.number,
  onStart: _propTypes2.default.func,
  onComplete: _propTypes2.default.func
};

Lottery.defaultProps = {
  duration: 2,
  onStart: function onStart() {},
  onComplete: function onComplete() {}
};

exports.default = Lottery;