github.com/ferranbt/nomad@v0.9.3-0.20190607002617-85c449b7667c/ui/app/components/list-accordion.js (about)

     1  import Component from '@ember/component';
     2  import { computed, get } from '@ember/object';
     3  
     4  export default Component.extend({
     5    classNames: ['accordion'],
     6  
     7    key: 'id',
     8    source: computed(() => []),
     9  
    10    onToggle(/* item, isOpen */) {},
    11    startExpanded: false,
    12  
    13    decoratedSource: computed('source.[]', function() {
    14      const stateCache = this.stateCache;
    15      const key = this.key;
    16      const deepKey = `item.${key}`;
    17      const startExpanded = this.startExpanded;
    18  
    19      const decoratedSource = this.source.map(item => {
    20        const cacheItem = stateCache.findBy(deepKey, get(item, key));
    21        return {
    22          item,
    23          isOpen: cacheItem ? !!cacheItem.isOpen : startExpanded,
    24        };
    25      });
    26  
    27      this.set('stateCache', decoratedSource);
    28      return decoratedSource;
    29    }),
    30  
    31    // When source updates come in, the state cache is used to preserve
    32    // open/close state.
    33    stateCache: computed(() => []),
    34  });