mirror of https://github.com/Chocobozzz/PeerTube
58 lines
1.7 KiB
TypeScript
58 lines
1.7 KiB
TypeScript
import { PipeTransform, Pipe } from '@angular/core'
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import { SafeHtml } from '@angular/platform-browser'
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// Thanks https://gist.github.com/adamrecsko/0f28f474eca63e0279455476cc11eca7#gistcomment-2917369
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@Pipe({
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name: 'highlight',
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standalone: true
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})
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export class HighlightPipe implements PipeTransform {
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/* use this for single match search */
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static SINGLE_MATCH = 'Single-Match'
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/* use this for single match search with a restriction that target should start with search string */
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static SINGLE_AND_STARTS_WITH_MATCH = 'Single-And-StartsWith-Match'
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/* use this for global search */
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static MULTI_MATCH = 'Multi-Match'
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transform (
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contentString: string = null,
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stringToHighlight: string = null,
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option = 'Single-And-StartsWith-Match',
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caseSensitive = false,
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highlightStyleName = 'search-highlight'
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): SafeHtml {
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if (stringToHighlight && contentString && option) {
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let regex: any = ''
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const caseFlag: string = !caseSensitive ? 'i' : ''
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switch (option) {
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case 'Single-Match': {
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regex = new RegExp(stringToHighlight, caseFlag)
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break
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}
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case 'Single-And-StartsWith-Match': {
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regex = new RegExp('^' + stringToHighlight, caseFlag)
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break
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}
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case 'Multi-Match': {
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regex = new RegExp(stringToHighlight, 'g' + caseFlag)
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break
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}
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default: {
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// default will be a global case-insensitive match
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regex = new RegExp(stringToHighlight, 'gi')
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}
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}
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const replaced = contentString.replace(
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regex,
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(match) => `<span class="${highlightStyleName}">${match}</span>`
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)
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return replaced
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} else {
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return contentString
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}
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}
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}
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