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import { Pipe, PipeTransform } from '@angular/core';
@Pipe({
name: 'searchHighlight'
})
export class SearchHighlightPipe implements PipeTransform {
transform(value: string, args: string): string {
if (!args) {
return value;
}
args = this.escapeRegExp(args);
const regex = new RegExp(args, 'gi');
const match = value.match(regex);
if (!match) {
return value;
}
return value.replace(regex, '<mark>$&</mark>');
}
private escapeRegExp(str: string) {
// $& means the whole matched string
return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}
}
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