ember-sortable/dist/services/ember-sortable-internal-state.js

Sortable UI primitives for Ember.

import { a as _defineProperty } from '../_rollupPluginBabelHelpers-a7bede49.js';
import s__default from '@ember/service';

class EmberSortableService extends s__default {
  constructor(...args) {
    super(...args);
    /**
     * Internal State for any groups currently in DOM
     *
     * {
     *   groupName: {
     *     groupModifier: object,
     *     items: []
     *   }
     * }
     * @type {{}}
     */
    _defineProperty(this, "groups", {});
  }
  /**
   * Register a new group with the service
   *
   * @param {String} groupName
   * @param {SortableGroupModifier} groupModifier
   */
  registerGroup(groupName, groupModifier) {
    if (this.groups[groupName] === undefined) {
      this.groups[groupName] = {
        groupModifier: groupModifier,
        items: []
      };
    } else {
      this.groups[groupName].groupModifier = groupModifier;
    }
  }

  /**
   * De-register a group with the service
   *
   * @param {String} groupName
   */
  deregisterGroup(groupName) {
    delete this.groups[groupName];
  }

  /**
   * Register an item with this group
   *
   * @method registerItem
   * @param {String} groupName
   * @param {SortableItemModifier} item
   */
  registerItem(groupName, item) {
    const groupDef = this.fetchGroup(groupName);
    if (!groupDef) {
      return;
    }
    let items = groupDef.items;
    if (items.indexOf(item) === -1) {
      items = [...items, item];
    }
    groupDef.items = items;
  }

  /**
   De-register an item with this group.
    @method deregisterItem
   @param groupName
   @param item
   */
  deregisterItem(groupName, item) {
    const groupDef = this.fetchGroup(groupName);
    if (!groupDef) {
      return;
    }
    const items = groupDef.items;
    const index = items.indexOf(item);
    if (index !== -1) {
      const newItems = [...items.slice(0, index), ...items.slice(index + 1)];
      groupDef.items = newItems;
    }
  }

  /**
   * Fetch a group definition
   *
   * @param {String} groupName
   * @returns {*}
   */
  fetchGroup(groupName) {
    if (this.groups[groupName] === undefined) {
      this.registerGroup(groupName, undefined);
    }
    return this.groups[groupName];
  }
}

export { EmberSortableService as default };
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