All files / pipes/highlight highlight.pipe.ts

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
1x
1x
 
 
 
 
 
 
1x
 
12x
12x
 
12x
4x
 
 
8x
8x
8x
 
8x
 
 
 
8x
 
 
 
import { Pipe, PipeTransform } from '@angular/core';
import { escapeHtml } from '@drevo-web/shared';
 
@Pipe({
    name: 'highlight',
    standalone: true,
    pure: true,
})
export class HighlightPipe implements PipeTransform {
    transform(text: string | null | undefined, phrase: string | null | undefined): string {
        const raw = text ?? '';
        const term = (phrase ?? '').trim();
 
        if (!raw || !term) {
            return escapeHtml(raw);
        }
 
        const escapedText = escapeHtml(raw);
        const escapedTerm = escapeHtml(term);
        const regex = new RegExp(`(${this.escapeRegex(escapedTerm)})`, 'gi');
 
        return escapedText.replace(regex, '<mark class="highlighted-text">$1</mark>');
    }
 
    private escapeRegex(str: string): string {
        return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
    }
}