import { Pipe, PipeTransform } from '@angular/core';

@Pipe({ name: 'mwHighlight' })
export class MwHighlightPipe implements PipeTransform {
  transform(text: string, searchText: string): string {
    if (
      !text ||
      !searchText ||
      typeof searchText !== 'string' ||
      searchText.length <= 0
    ) {
      return text;
    }
    const regexpString = `(${searchText
      .split(' ')
      .map((t) => t.trim().replace(/[.*+?^${}()|[\]\\]/g, '\\$&'))
      .join('|')})`;

    const regex = new RegExp(regexpString, 'gi');
    return text.replace(regex, (str) => `<b>${str}</b>`);
  }
}