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• 1.0.0-RC6
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• OutwatchTracing.scala

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outwatch.helpers.OutwatchTracing.scala Maven / Gradle / Ivy

package outwatch.helpers

import colibri._
import colibri.helpers.UnhandledErrorReporter
import snabbdom.VNodeProxy
import org.scalajs.dom

object OutwatchTracing {
  private[outwatch] val patchSubject = Subject.publish[VNodeProxy]
  private[outwatch] val errorSubject = Subject.publish[Throwable]

  // a stream to be notified about snabbdom patches
  def patch: Observable[VNodeProxy] = patchSubject

  // a stream about unhandled errors in the reactive part of outwatch, with a
  // default subscription that will print the error to notify the user.
  val error: Observable[Throwable] = Observable.merge(errorSubject, UnhandledErrorReporter.error).recover { case t => t }.doOnNext(reportError).publish.hot

  private def reportError(error: Throwable): Unit =
    dom.console.error(error.toString, error.getMessage, error.getStackTrace.mkString("\n"))
}