airbnb/caravel

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
import componentIsResizable from './componentIsResizable';
import shouldWrapChildInRow from './shouldWrapChildInRow';
import newComponentFactory from './newComponentFactory';
import getComponentWidthFromDrop from './getComponentWidthFromDrop';

import { ROW_TYPE, TABS_TYPE, TAB_TYPE } from './componentTypes';

export default function newEntitiesFromDrop({ dropResult, layout }) {
  const { dragging, destination } = dropResult;

  const dragType = dragging.type;
  const dropEntity = layout[destination.id];
  const dropType = dropEntity.type;
  let newDropChild = newComponentFactory(dragType, dragging.meta);
  newDropChild.parents = (dropEntity.parents || []).concat(dropEntity.id);

  if (componentIsResizable(dragging)) {
    newDropChild.meta.width = // don't set a 0 width
      getComponentWidthFromDrop({ dropResult, layout }) || undefined;
  }

  const wrapChildInRow = shouldWrapChildInRow({
    parentType: dropType,
    childType: dragType,
  });

  const newEntities = {
    [newDropChild.id]: newDropChild,
  };

  if (wrapChildInRow) {
    const rowWrapper = newComponentFactory(ROW_TYPE);
    rowWrapper.children = [newDropChild.id];
    rowWrapper.parents = (dropEntity.parents || []).concat(dropEntity.id);
    newEntities[rowWrapper.id] = rowWrapper;
    newDropChild.parents = rowWrapper.parents.concat(rowWrapper.id);
    newDropChild = rowWrapper;
  } else if (dragType === TABS_TYPE) {
    // create a new tab component
    const tabChild = newComponentFactory(TAB_TYPE);
    tabChild.parents = (dropEntity.parents || []).concat(dropEntity.id);
    newDropChild.children = [tabChild.id];
    newEntities[tabChild.id] = tabChild;
  }

  const nextDropChildren = [...dropEntity.children];
  nextDropChildren.splice(destination.index, 0, newDropChild.id);

  newEntities[destination.id] = {
    ...dropEntity,
    children: nextDropChildren,
  };

  return newEntities;
}