com.github.messenger4j.webhook.factory.MessageDeliveredEventFactory Maven / Gradle / Ivy

package com.github.messenger4j.webhook.factory;

import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_DELIVERY;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_ID;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_MIDS;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_RECIPIENT;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_SENDER;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_TIMESTAMP;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_WATERMARK;
import static com.github.messenger4j.internal.gson.GsonUtil.getPropertyAsInstant;
import static com.github.messenger4j.internal.gson.GsonUtil.getPropertyAsJsonArray;
import static com.github.messenger4j.internal.gson.GsonUtil.getPropertyAsString;
import static com.github.messenger4j.internal.gson.GsonUtil.hasProperty;

import com.github.messenger4j.webhook.event.MessageDeliveredEvent;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import java.time.Instant;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

/**
 * @author Max Grabenhorst
 * @since 1.0.0
 */
final class MessageDeliveredEventFactory implements BaseEventFactory {

  @Override
  public boolean isResponsible(JsonObject messagingEvent) {
    return hasProperty(messagingEvent, PROP_DELIVERY);
  }

  @Override
  public MessageDeliveredEvent createEventFromJson(JsonObject messagingEvent) {
    final String senderId =
        getPropertyAsString(messagingEvent, PROP_SENDER, PROP_ID)
            .orElseThrow(IllegalArgumentException::new);
    final String recipientId =
        getPropertyAsString(messagingEvent, PROP_RECIPIENT, PROP_ID)
            .orElseThrow(IllegalArgumentException::new);
    final Instant timestamp =
        getPropertyAsInstant(messagingEvent, PROP_TIMESTAMP).orElse(Instant.now());
    final Instant watermark =
        getPropertyAsInstant(messagingEvent, PROP_DELIVERY, PROP_WATERMARK)
            .orElseThrow(IllegalArgumentException::new);
    final Optional> messageIds =
        getPropertyAsJsonArray(messagingEvent, PROP_DELIVERY, PROP_MIDS)
            .map(this::getMessageIdsFromJsonArray);

    return new MessageDeliveredEvent(senderId, recipientId, timestamp, watermark, messageIds);
  }

  private List getMessageIdsFromJsonArray(JsonArray jsonArray) {
    final List messageIdList = new ArrayList<>(jsonArray.size());
    for (JsonElement messageIdJsonElement : jsonArray) {
      messageIdList.add(messageIdJsonElement.getAsString());
    }
    return messageIdList;
  }
}