app/assets/javascripts/filtered_search/stores/recent_searches_store.js


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import { uniq } from 'lodash';

class RecentSearchesStore {
  constructor(initialState = {}, allowedKeys) {
    this.state = {
      isLocalStorageAvailable: true,
      recentSearches: [],
      allowedKeys,
      ...initialState,
    };
  }

  addRecentSearch(newSearch) {
    this.setRecentSearches([newSearch].concat(this.state.recentSearches));

    return this.state.recentSearches;
  }

  setRecentSearches(searches = []) {
    const trimmedSearches = searches.map(search => search.trim());
    this.state.recentSearches = uniq(trimmedSearches).slice(0, 5);
    return this.state.recentSearches;
  }
}

export default RecentSearchesStore;