128 lines
3.6 KiB
JavaScript
128 lines
3.6 KiB
JavaScript
import Mixin from '@ember/object/mixin';
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import { get, computed } from '@ember/object';
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import { reads } from '@ember/object/computed';
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import Fuse from 'fuse.js';
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/**
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Searchable mixin
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Simple search filtering behavior for a list of objects.
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Properties to override:
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- searchTerm: the string to use as a query
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- searchProps: the props on each object to search
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-- exactMatchSearchProps: the props for exact search when props are different per search type
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-- regexSearchProps: the props for regex search when props are different per search type
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-- fuzzySearchProps: the props for fuzzy search when props are different per search type
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- exactMatchEnabled: (true) disable to not use the exact match search type
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- fuzzySearchEnabled: (false) enable to use the fuzzy search type
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- regexEnabled: (true) disable to disable the regex search type
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- listToSearch: the list of objects to search
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Properties provided:
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- listSearched: a subset of listToSearch of items that meet the search criteria
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*/
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export default Mixin.create({
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searchTerm: '',
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listToSearch: computed(() => []),
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searchProps: null,
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exactMatchSearchProps: reads('searchProps'),
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regexSearchProps: reads('searchProps'),
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fuzzySearchProps: reads('searchProps'),
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// Three search modes
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exactMatchEnabled: true,
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fuzzySearchEnabled: false,
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regexEnabled: true,
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// Search should reset pagination. Not every instance of
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// search will be paired with pagination, but it's still
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// preferable to generalize this rather than risking it being
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// forgotten on a single page.
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resetPagination() {
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if (this.get('currentPage') != null) {
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this.set('currentPage', 1);
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}
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},
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fuse: computed('listToSearch.[]', 'fuzzySearchProps.[]', function() {
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return new Fuse(this.get('listToSearch'), {
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shouldSort: true,
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threshold: 0.4,
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location: 0,
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distance: 100,
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tokenize: true,
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matchAllTokens: true,
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maxPatternLength: 32,
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minMatchCharLength: 1,
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keys: this.get('fuzzySearchProps') || [],
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getFn(item, key) {
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return get(item, key);
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},
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});
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}),
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listSearched: computed(
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'searchTerm',
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'listToSearch.[]',
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'exactMatchEnabled',
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'fuzzySearchEnabled',
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'regexEnabled',
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'exactMatchSearchProps.[]',
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'fuzzySearchProps.[]',
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'regexSearchProps.[]',
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function() {
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const searchTerm = this.get('searchTerm').trim();
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if (!searchTerm || !searchTerm.length) {
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return this.get('listToSearch');
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}
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const results = [];
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if (this.get('exactMatchEnabled')) {
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results.push(
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...exactMatchSearch(
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searchTerm,
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this.get('listToSearch'),
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this.get('exactMatchSearchProps')
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)
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);
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}
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if (this.get('fuzzySearchEnabled')) {
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results.push(...this.get('fuse').search(searchTerm));
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}
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if (this.get('regexEnabled')) {
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results.push(
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...regexSearch(searchTerm, this.get('listToSearch'), this.get('regexSearchProps'))
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);
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}
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return results.uniq();
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}
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),
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});
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function exactMatchSearch(term, list, keys) {
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if (term.length) {
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return list.filter(item => keys.some(key => get(item, key) === term));
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}
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}
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function regexSearch(term, list, keys) {
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if (term.length) {
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try {
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const regex = new RegExp(term, 'i');
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// Test the value of each key for each object against the regex
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// All that match are returned.
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return list.filter(item => keys.some(key => regex.test(get(item, key))));
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} catch (e) {
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// Swallow the error; most likely due to an eager search of an incomplete regex
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}
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return [];
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}
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}
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