com.hubspot.baragon.agent.handlebars.CurrentRackIsPresentHelper Maven / Gradle / Ivy

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package com.hubspot.baragon.agent.handlebars;

import java.io.IOException;
import java.util.Collection;

import com.github.jknack.handlebars.Helper;
import com.github.jknack.handlebars.Options;
import com.google.common.base.Optional;
import com.hubspot.baragon.models.UpstreamInfo;

public class CurrentRackIsPresentHelper implements Helper> {
  private final Optional currentRackId;

  public CurrentRackIsPresentHelper(Optional currentRackId) {
    this.currentRackId = currentRackId;
  }

  @Override
  public CharSequence apply(Collection upstreams, Options options) throws IOException {
    if (!currentRackId.isPresent()) {
      return options.fn();
    }

    if (upstreams == null) {
      return options.inverse();
    }

    for (UpstreamInfo upstreamInfo : upstreams) {
      if (upstreamInfo.getRackId().isPresent() && upstreamInfo.getRackId().get().toLowerCase().equals(currentRackId.get().toLowerCase())) {
        return options.fn();
      }
    }
    return options.inverse();
  }
}