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

/*
 * Changes the case of the first letter of a given number of words in a string.
*/
@Pipe({ name: 'titleCase', pure: false })
export class TitleCase implements PipeTransform {

    public static toTitleCase(input: string): string {
        if (!input) {
            return '';
        }
        return input.replace(/\w\S*/g, (txt => txt[0].toUpperCase() + txt.substr(1).toLowerCase()));
    }

    transform(input: string, length: number): string {
        return TitleCase.toTitleCase(input);
    }
}