carbon-components/es/components/file-uploader/file-uploader.js

function _typeof(obj) {
  if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
    _typeof = function _typeof(obj) {
      return typeof obj;
    };
  } else {
    _typeof = function _typeof(obj) {
      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
    };
  }

  return _typeof(obj);
}

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

function _createClass(Constructor, protoProps, staticProps) {
  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
  if (staticProps) _defineProperties(Constructor, staticProps);
  return Constructor;
}

function _possibleConstructorReturn(self, call) {
  if (call && (_typeof(call) === "object" || typeof call === "function")) {
    return call;
  }

  return _assertThisInitialized(self);
}

function _assertThisInitialized(self) {
  if (self === void 0) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }

  return self;
}

function _getPrototypeOf(o) {
  _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
    return o.__proto__ || Object.getPrototypeOf(o);
  };
  return _getPrototypeOf(o);
}

function _inherits(subClass, superClass) {
  if (typeof superClass !== "function" && superClass !== null) {
    throw new TypeError("Super expression must either be null or a function");
  }

  subClass.prototype = Object.create(superClass && superClass.prototype, {
    constructor: {
      value: subClass,
      writable: true,
      configurable: true
    }
  });
  if (superClass) _setPrototypeOf(subClass, superClass);
}

function _setPrototypeOf(o, p) {
  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
    o.__proto__ = p;
    return o;
  };

  return _setPrototypeOf(o, p);
}
/**
 * Copyright IBM Corp. 2016, 2018
 *
 * This source code is licensed under the Apache-2.0 license found in the
 * LICENSE file in the root directory of this source tree.
 */


import { componentsX } from '../../globals/js/feature-flags';
import settings from '../../globals/js/settings';
import mixin from '../../globals/js/misc/mixin';
import createComponent from '../../globals/js/mixins/create-component';
import initComponentBySearch from '../../globals/js/mixins/init-component-by-search';
import eventedState from '../../globals/js/mixins/evented-state';
import handles from '../../globals/js/mixins/handles';
import eventMatches from '../../globals/js/misc/event-matches';
import on from '../../globals/js/misc/on';

var toArray = function toArray(arrayLike) {
  return Array.prototype.slice.call(arrayLike);
};

var FileUploader =
/*#__PURE__*/
function (_mixin) {
  _inherits(FileUploader, _mixin);
  /**
   * File uploader.
   * @extends CreateComponent
   * @extends InitComponentBySearch
   * @extends eventedState
   * @extends Handles
   * @param {HTMLElement} element The element working as a file uploader.
   * @param {Object} [options] The component options. See static options.
   */


  function FileUploader(element) {
    var _this;

    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

    _classCallCheck(this, FileUploader);

    _this = _possibleConstructorReturn(this, _getPrototypeOf(FileUploader).call(this, element, options));

    _this._changeState = function (state, detail, callback) {
      if (state === 'delete-filename-fileuploader') {
        _this.container.removeChild(detail.filenameElement);
      }

      if (typeof callback === 'function') {
        callback();
      }
    };

    _this._handleDeleteButton = function (evt) {
      var target = eventMatches(evt, "[data-for=".concat(_this.inputId, "]"));

      if (target) {
        _this._changeState('delete-filename-fileuploader', {
          initialEvt: evt,
          filenameElement: target.parentNode
        });
      }
    };

    _this.input = _this.element.querySelector(_this.options.selectorInput);
    _this.container = _this.element.querySelector(_this.options.selectorContainer);

    if (!_this.input) {
      throw new TypeError('Cannot find the file input box.');
    }

    if (!_this.container) {
      throw new TypeError('Cannot find the file names container.');
    }

    _this.inputId = _this.input.getAttribute('id');

    _this.manage(on(_this.input, 'change', function () {
      return _this._displayFilenames();
    }));

    _this.manage(on(_this.container, 'click', _this._handleDeleteButton));

    return _this;
  }

  _createClass(FileUploader, [{
    key: "_filenamesHTML",
    value: function _filenamesHTML(name, id) {
      return "<span class=\"".concat(this.options.classSelectedFile, "\">\n      <p class=\"").concat(this.options.classFileName, "\">").concat(name, "</p>\n      <span data-for=\"").concat(id, "\" class=\"").concat(this.options.classStateContainer, "\"></span>\n    </span>");
    }
  }, {
    key: "_uploadHTML",
    value: function _uploadHTML() {
      return "\n      <div data-loading class=\"".concat(this.options.classLoading, "\">\n        <svg class=\"").concat(this.options.classLoadingSvg, "\" viewBox=\"-42 -42 84 84\">\n          <circle cx=\"0\" cy=\"0\" r=\"37.5\" />\n        </svg>\n      </div>");
    }
  }, {
    key: "_closeButtonHTML",
    value: function _closeButtonHTML() {
      if (componentsX) {
        return "\n      <button class=\"".concat(this.options.classFileClose, "\" type=\"button\" aria-label=\"close\">\n      <svg aria-hidden=\"true\" viewBox=\"0 0 16 16\" width=\"16\" height=\"16\">\n      <path fill=\"#231F20\" d=\"M12 4.7l-.7-.7L8 7.3 4.7 4l-.7.7L7.3 8 4 11.3l.7.7L8 8.7l3.3 3.3.7-.7L8.7 8z\"/>\n      </svg>\n      </button>");
      }

      return "\n    <svg class=\"".concat(this.options.classFileClose, "\" tabindex=\"0\" viewBox=\"0 0 16 16\" fill-rule=\"evenodd\" width=\"16\" height=\"16\">\n      <path d=\"M8 0C3.6 0 0 3.6 0 8s3.6 8 8 8 8-3.6 8-8-3.6-8-8-8zm3.5 10.1l-1.4 1.4L8\n        9.4l-2.1 2.1-1.4-1.4L6.6 8 4.5 5.9l1.4-1.4L8 6.6l2.1-2.1 1.4 1.4L9.4 8l2.1 2.1z\" />\n    </svg>");
    }
  }, {
    key: "_checkmarkHTML",
    value: function _checkmarkHTML() {
      return "\n      <svg class=\"".concat(this.options.classFileComplete, "\" viewBox=\"0 0 16 16\" fill-rule=\"evenodd\" width=\"16\" height=\"16\">\n       <path d=\"M8 0C3.6 0 0 3.6 0 8s3.6 8 8 8 8-3.6 8-8-3.6-8-8-8zM6.7 11.5L3.4 8.1l1.4-1.4 1.9 1.9 4.1-4.1 1.4 1.4-5.5 5.6z\"/>\n      </svg>");
    }
  }, {
    key: "_getStateContainers",
    value: function _getStateContainers() {
      var stateContainers = toArray(this.element.querySelectorAll("[data-for=".concat(this.inputId, "]")));

      if (stateContainers.length === 0) {
        throw new TypeError('State container elements not found; invoke _displayFilenames() first');
      }

      if (stateContainers[0].dataset.for !== this.inputId) {
        throw new TypeError('File input id must equal [data-for] attribute');
      }

      return stateContainers;
    }
    /**
     * Inject selected files into DOM. Invoked on change event.
     */

  }, {
    key: "_displayFilenames",
    value: function _displayFilenames() {
      var _this2 = this;

      var container = this.element.querySelector(this.options.selectorContainer);
      var HTMLString = toArray(this.input.files).map(function (file) {
        return _this2._filenamesHTML(file.name, _this2.inputId);
      }).join('');
      container.insertAdjacentHTML('afterbegin', HTMLString);
    }
  }, {
    key: "_removeState",
    value: function _removeState(element) {
      if (!element || element.nodeType !== Node.ELEMENT_NODE) {
        throw new TypeError('DOM element should be given to initialize this widget.');
      }

      while (element.firstChild) {
        element.removeChild(element.firstChild);
      }
    }
  }, {
    key: "_handleStateChange",
    value: function _handleStateChange(elements, selectIndex, html) {
      var _this3 = this;

      if (selectIndex === undefined) {
        elements.forEach(function (el) {
          _this3._removeState(el);

          el.insertAdjacentHTML('beforeend', html);
        });
      } else {
        elements.forEach(function (el, index) {
          if (index === selectIndex) {
            _this3._removeState(el);

            el.insertAdjacentHTML('beforeend', html);
          }
        });
      }
    }
    /**
     * Handles delete button.
     * @param {Event} evt The event triggering this action.
     * @private
     */

  }, {
    key: "setState",
    value: function setState(state, selectIndex) {
      var stateContainers = this._getStateContainers();

      if (state === 'edit') {
        this._handleStateChange(stateContainers, selectIndex, this._closeButtonHTML());
      }

      if (state === 'upload') {
        this._handleStateChange(stateContainers, selectIndex, this._uploadHTML());
      }

      if (state === 'complete') {
        this._handleStateChange(stateContainers, selectIndex, this._checkmarkHTML());
      }
    }
    /**
     * The map associating DOM element and file uploader instance.
     * @member FileUploader.components
     * @type {WeakMap}
     */

  }], [{
    key: "options",
    get: function get() {
      var prefix = settings.prefix;
      return {
        selectorInit: '[data-file]',
        selectorInput: "input[type=\"file\"].".concat(prefix, "--file-input"),
        selectorContainer: '[data-file-container]',
        selectorCloseButton: ".".concat(prefix, "--file-close"),
        classLoading: "".concat(prefix, "--loading"),
        classLoadingSvg: "".concat(prefix, "--loading__svg"),
        classFileName: "".concat(prefix, "--file-filename"),
        classFileClose: "".concat(prefix, "--file-close"),
        classFileComplete: "".concat(prefix, "--file-complete"),
        classSelectedFile: "".concat(prefix, "--file__selected-file"),
        classStateContainer: "".concat(prefix, "--file__state-container"),
        eventBeforeDeleteFilenameFileuploader: 'fileuploader-before-delete-filename',
        eventAfterDeleteFilenameFileuploader: 'fileuploader-after-delete-filename'
      };
    }
  }]);

  FileUploader.components = new WeakMap();
  return FileUploader;
}(mixin(createComponent, initComponentBySearch, eventedState, handles));

export default FileUploader;