result-pipe.pipe.ts
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	import { Pipe, PipeTransform } from '@angular/core';
	import { FoundPage} from '../datatypes/search';
	@Pipe({
	name: 'resultPipe'
	})
	export class ResultPipePipe implements PipeTransform {

	transform(pages: FoundPage[]): string {
	if (pages.length == 0){
	return 'Keine Treffer'
	}
	let pageResult = (pages.length > 1) ? pages.length + ' Seiten' : pages[0].title + ' ' + pages[0].number;
	let numFoundWords = 0;
	pages.forEach(page =>page.results.forEach(result =>numFoundWords++));
	return numFoundWords + ' Treffer auf ' + pageResult;
	}

	}