TelegramBots/src/main/java/org/telegram/telegrambots/api/methods/groupadministration/LeaveChat.java

package org.telegram.telegrambots.api.methods.groupadministration;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;

import org.json.JSONObject;
import org.telegram.telegrambots.Constants;
import org.telegram.telegrambots.api.methods.BotApiMethod;
import org.telegram.telegrambots.exceptions.TelegramApiValidationException;

import java.io.IOException;

/**
 * @author Ruben Bermudez
 * @version 1.0
 * @brief Use this method for your bot to leave a group, supergroup or channel. Returns True on success.
 * @date 20 of May of 2016
 */
public class LeaveChat extends BotApiMethod<Boolean> {
    public static final String PATH = "leaveChat";

    private static final String CHATID_FIELD = "chat_id";
    private String chatId; ///< Unique identifier for the chat to send the message to (Or username for channels)

    public LeaveChat() {
        super();
    }

    public String getChatId() {
        return chatId;
    }

    public LeaveChat setChatId(String chatId) {
        this.chatId = chatId;
        return this;
    }

    @Override
    public JSONObject toJson() {
        JSONObject jsonObject = new JSONObject();
        jsonObject.put(CHATID_FIELD, chatId);
        return jsonObject;
    }

    @Override
    public String getPath() {
        return PATH;
    }

    @Override
    public Boolean deserializeResponse(JSONObject answer) {
        if (answer.getBoolean(Constants.RESPONSEFIELDOK)) {
            return answer.getBoolean(Constants.RESPONSEFIELDRESULT);
        }
        return null;
    }

    @Override
    public void validate() throws TelegramApiValidationException {
        if (chatId == null) {
            throw new TelegramApiValidationException("ChatId can't be null", this);
        }
    }

    @Override
    public void serialize(JsonGenerator gen, SerializerProvider serializers) throws IOException {
        gen.writeStartObject();
        gen.writeStringField(METHOD_FIELD, PATH);
        gen.writeStringField(CHATID_FIELD, chatId);
        gen.writeEndObject();
        gen.flush();
    }

    @Override
    public void serializeWithType(JsonGenerator gen, SerializerProvider serializers, TypeSerializer typeSer) throws IOException {
        serialize(gen, serializers);
    }

    @Override
    public String toString() {
        return "LeaveChat{" +
                "chatId='" + chatId + '\'' +
                '}';
    }
}