Nested templates

[Loskir]

Add the t function to templateData so that we can use t inside the template itself

For example:

greeting: hello!
main: i like trains.
end: bye!

text: |-
  ${t('greeting')}

  ${t('main')}

  ${t('end')}

[EdJoPaTo]

you can already add it yourself when needed.

bot.command('translaception', async ctx => {
  const result = ctx.i18n.t('whatever', {t: ctx.i18n.t})
  await ctx.reply(result)
})

For a more permanent solution add it via templateData on the I18n initialisation:

const i18n = new I18n({
  …
  templateData: {
    translateWithLanguageArgument: (languageCode: string, resourceKey: string) => i18n.t(languageCode, resourceKey),
    translateWithUserLanguage: (resourceKey: string) => i18n.t((this as any).languageCode, resourceKey),
    uppercase: (value: string) => value.toUpperCase()
  }
})