ndla-ui/lib/Subject/SubjectShortcuts.js

UI component library for NDLA.

'use strict';

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

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

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 _reactTransitionGroup = require('react-transition-group');

var _reactBemHelper = require('react-bem-helper');

var _reactBemHelper2 = _interopRequireDefault(_reactBemHelper);

var _common = require('ndla-icons/common');

var _Subject = require('./Subject');

var _SafeLink = require('../common/SafeLink');

var _SafeLink2 = _interopRequireDefault(_SafeLink);

var _Fade = require('../Animation/Fade');

var _Fade2 = _interopRequireDefault(_Fade);

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 classes = (0, _reactBemHelper2.default)('c-subject-shortcuts');

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

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

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

    _this.state = {
      visibleCount: props.defaultVisableCount
    };

    _this.handleOnExpand = _this.handleOnExpand.bind(_this);
    return _this;
  }

  _createClass(SubjectShortcuts, [{
    key: 'handleOnExpand',
    value: function handleOnExpand(expanded) {
      var newVisibleCount = expanded ? this.props.links.length : this.props.defaultVisableCount;

      this.setState({
        visibleCount: newVisibleCount
      });
    }
  }, {
    key: 'render',
    value: function render() {
      var _this2 = this;

      var _props = this.props,
          links = _props.links,
          messages = _props.messages,
          defaultVisableCount = _props.defaultVisableCount;

      var id = 'subject-shortcut';

      var showExpand = defaultVisableCount < links.length;
      var button = null;
      var filteredLinks = this.props.links;

      if (showExpand) {
        var isExpanded = this.state.visibleCount > defaultVisableCount;
        var buttonText = isExpanded ? messages.showLess : messages.showMore;

        button = _react2.default.createElement(
          'button',
          _extends({
            type: 'button',
            'aria-expanded': isExpanded,
            'aria-controls': id,
            onClick: function onClick() {
              return _this2.handleOnExpand(!isExpanded);
            }
          }, classes('expand-button')),
          _react2.default.createElement(_common.Forward, null),
          _react2.default.createElement(
            'span',
            null,
            buttonText
          )
        );

        filteredLinks = this.props.links.filter(function (link, index) {
          return index < _this2.state.visibleCount;
        });
      }
      return _react2.default.createElement(
        'section',
        classes(''),
        _react2.default.createElement(
          _Subject.SubjectSectionTitle,
          null,
          messages.heading
        ),
        _react2.default.createElement(
          'nav',
          { id: id },
          _react2.default.createElement(
            _reactTransitionGroup.TransitionGroup,
            { className: classes('list').className, component: 'ul' },
            filteredLinks.map(function (link) {
              return _react2.default.createElement(
                _Fade2.default,
                { key: link.url },
                _react2.default.createElement(
                  'li',
                  classes('item'),
                  _react2.default.createElement(
                    _SafeLink2.default,
                    { to: link.url },
                    link.text
                  )
                )
              );
            })
          )
        ),
        button
      );
    }
  }]);

  return SubjectShortcuts;
}(_react.Component);

SubjectShortcuts.propTypes = {
  links: _propTypes2.default.arrayOf(_propTypes2.default.shape({
    url: _propTypes2.default.string.isRequired,
    text: _propTypes2.default.string.isRequired
  })).isRequired,
  messages: _propTypes2.default.shape({
    heading: _propTypes2.default.string.isRequired,
    showMore: _propTypes2.default.string.isRequired,
    showLess: _propTypes2.default.string.isRequired
  }).isRequired,
  defaultVisableCount: _propTypes2.default.number
};

SubjectShortcuts.defaultProps = {
  defaultVisableCount: 6
};

exports.default = SubjectShortcuts;