to-pascal-case.ts

import type { PrototypeStruct } from '../index.js';
import { postCase, preCase } from './to-case.js';

interface ToPascalCase {
  toPascalCase(): string;
}

export const toPascalCase: PrototypeStruct = {
  label: 'toPascalCase',
  fn: function stringToPascalCase(): string {
    const ctx = (this as unknown as string);

    return !ctx.length ?
      '' :
      postCase(
        preCase(ctx).replace(/(\b[a-zA-Z])/g, (_, c) => c.toUpperCase()));
  },
};

declare global {
  // tslint:disable-next-line: no-empty-interface
  interface String extends ToPascalCase {}
}