/**
 * Texts with named blanks, such as "{name} on a phone". The page texts are plain
 * data in two languages, so a sentence with a variable part keeps a blank for it.
 */
export type TemplateValues = Readonly<Record<string, string | number>>;

const BLANK = /\{(\w+)\}/g;

export function fill(template: string, values: TemplateValues): string {
  return template.replace(BLANK, (blank, name: string) =>
    Object.hasOwn(values, name) ? String(values[name]) : blank,
  );
}