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

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package com.github.messenger4j.webhook.factory;

import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_ENTITIES;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_ID;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_IS_ECHO;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_MESSAGE;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_MID;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_NLP;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_PRIOR_MESSAGE;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_QUICK_REPLY;
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_TEXT;
import static com.github.messenger4j.internal.gson.GsonUtil.Constants.PROP_TIMESTAMP;
import static com.github.messenger4j.internal.gson.GsonUtil.getPropertyAsInstant;
import static com.github.messenger4j.internal.gson.GsonUtil.getPropertyAsJsonObject;
import static com.github.messenger4j.internal.gson.GsonUtil.getPropertyAsString;
import static com.github.messenger4j.internal.gson.GsonUtil.hasProperty;

import com.github.messenger4j.webhook.event.TextMessageEvent;
import com.github.messenger4j.webhook.event.common.PriorMessage;
import com.github.messenger4j.webhook.event.nlp.NLPEntity;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import java.time.Instant;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Optional;
import java.util.Set;

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

  @Override
  public boolean isResponsible(JsonObject messagingEvent) {
    return hasProperty(messagingEvent, PROP_MESSAGE, PROP_TEXT)
        && !hasProperty(messagingEvent, PROP_MESSAGE, PROP_QUICK_REPLY)
        && !hasProperty(messagingEvent, PROP_MESSAGE, PROP_IS_ECHO);
  }

  @Override
  public TextMessageEvent 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)
            .orElseThrow(IllegalArgumentException::new);
    final String messageId =
        getPropertyAsString(messagingEvent, PROP_MESSAGE, PROP_MID)
            .orElseThrow(IllegalArgumentException::new);
    final String text =
        getPropertyAsString(messagingEvent, PROP_MESSAGE, PROP_TEXT)
            .orElseThrow(IllegalArgumentException::new);
    final Optional>> nlpEntities =
        getPropertyAsJsonObject(messagingEvent, PROP_MESSAGE, PROP_NLP, PROP_ENTITIES)
            .map(this::getNlpEntitiesFromJsonObject);
    final Optional priorMessage =
        getPropertyAsJsonObject(messagingEvent, PROP_PRIOR_MESSAGE)
            .map(this::getPriorMessageFromJsonObject);

    return new TextMessageEvent(
        senderId, recipientId, timestamp, messageId, text, nlpEntities, priorMessage);
  }

  private Map> getNlpEntitiesFromJsonObject(JsonObject jsonObject) {
    final Map> nlpEntities = new HashMap<>();
    for (String key : jsonObject.keySet()) {
      final JsonArray valuesJsonArray = jsonObject.getAsJsonArray(key);
      final Set values = new HashSet<>(valuesJsonArray.size());
      for (JsonElement jsonElement : valuesJsonArray) {
        values.add(new NLPEntity(jsonElement.toString()));
      }
      nlpEntities.put(key, Collections.unmodifiableSet(values));
    }
    return nlpEntities;
  }
}