s_mach.i18n.messages.Interpolator.scala Maven / Gradle / Ivy

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package s_mach.i18n.messages

import MessageFormat.Interpolation
import s_mach.i18n._
import s_mach.i18n.impl.{LaxInterpolator, StrictInterpolator}

/**
  * A trait for interpolating arguments into a message format interpolation
  */
trait Interpolator {
  /**
    * Interpolate the supplied arguments into the interpolation parts
    * @param parts interpolation parts to substitute arguments for
    * @param args arguments to substitute into the interpolation
    * @return I18NString
    */
  def interpolate(
    parts: Seq[Interpolation.Part],
    args: I18NString*
  ) : I18NString
}

object Interpolator {
  /** An interpolator that throws an exception on error */
  val strict = new StrictInterpolator
  /** An interpolation that never throws an exception on error but instead
    * returns an error I18NString */
  val lax = new LaxInterpolator(missingArg => s"{$missingArg:missing}")
  val default = strict
}