io.github.zeroone3010.yahueapi.v2.SwitchFactory Maven / Gradle / Ivy

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A library for controlling Philips Hue lights.
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package io.github.zeroone3010.yahueapi.v2;

import com.fasterxml.jackson.databind.ObjectMapper;
import io.github.zeroone3010.yahueapi.HueApiException;
import io.github.zeroone3010.yahueapi.v2.domain.ButtonResource;
import io.github.zeroone3010.yahueapi.v2.domain.ButtonResourceRoot;
import io.github.zeroone3010.yahueapi.v2.domain.DeviceResource;
import io.github.zeroone3010.yahueapi.v2.domain.ResourceIdentifier;

import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.UUID;
import java.util.function.Predicate;
import java.util.function.Supplier;

import static io.github.zeroone3010.yahueapi.v2.domain.ResourceType.BUTTON;
import static java.util.stream.Collectors.toMap;

public class SwitchFactory {

  private final Hue hue;
  private final ObjectMapper objectMapper;

  private static final Predicate BUTTON_FILTER = s -> BUTTON == s.getResourceType();

  public SwitchFactory(final Hue hue, final ObjectMapper objectMapper) {
    this.hue = hue;
    this.objectMapper = objectMapper;
  }

  public SwitchImpl buildSwitch(final DeviceResource resource,
                                final Map allButtons) {
    if (resource.getServices().stream().noneMatch(BUTTON_FILTER)) {
      return null;
    }
    final Map buttons = resource.getServices().stream()
        .filter(BUTTON_FILTER)
        .map(ResourceIdentifier::getResourceId)
        .map(allButtons::get)
        .map(button -> new ButtonImpl(createButtonStateProvider(button.getId()), button))
        .collect(toMap(ButtonImpl::getId, button -> button));
    final SwitchImpl result = new SwitchImpl(
        resource.getId(),
        buttons,
        resource.getMetadata().getName()
    );
    buttons.values().forEach(button -> ((ButtonImpl) button).setOwner(result));
    return result;
  }

  private Supplier createButtonStateProvider(final UUID buttonId) {
    return () -> {
// TODO: Implement the caching part again
//      if (hue.isCaching()) {
//        return hue.getRaw().getSensors().get(id).getState();
//      }
      try (final InputStream inputStream = hue.getUrlConnection("/button/" + buttonId.toString()).getInputStream()) {
        return objectMapper.readValue(inputStream, ButtonResourceRoot.class).getData().get(0);
      } catch (final IOException e) {
        throw new HueApiException(e);
      }
    };
  }
}