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PubNub is a cross-platform client-to-client (1:1 and 1:many) push service in the cloud, capable of broadcasting real-time messages to millions of web and mobile clients simultaneously, in less than a quarter second!

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package com.pubnub.internal.java.endpoints;

import com.pubnub.api.Endpoint;
import com.pubnub.api.PubNub;
import com.pubnub.api.PubNubException;
import com.pubnub.api.java.builder.PubNubErrorBuilder;
import com.pubnub.api.java.endpoints.MessageCounts;
import com.pubnub.api.models.consumer.history.PNMessageCountResult;
import lombok.Setter;
import lombok.experimental.Accessors;
import org.jetbrains.annotations.NotNull;

import java.util.List;

@Setter
@Accessors(chain = true, fluent = true)
public class MessageCountsImpl extends PassthroughEndpoint implements MessageCounts {

    /**
     * The channel name you wish to pull history from. May be a single channel, or multiple channels, separated by
     * comma.
     */
    private List channels;

    /**
     * Comma-delimited list of timetokens, in order of the channels list, in the request path. If list of timetokens
     * is not same length as list of channels, a 400 bad request will result.
     */
    private List channelsTimetoken;

    public MessageCountsImpl(PubNub pubnub) {
        super(pubnub);
    }

    @Override
    @NotNull
    protected Endpoint createRemoteAction() {
        return pubnub.messageCounts(channels, channelsTimetoken);
    }

    @Override
    protected void validateParams() throws PubNubException {
        if (channels == null || channels.isEmpty()) {
            throw new PubNubException(PubNubErrorBuilder.PNERROBJ_CHANNEL_MISSING);
        }
        if (channelsTimetoken == null || channelsTimetoken.contains(null)) {
            throw new PubNubException(PubNubErrorBuilder.PNERROBJ_TIMETOKEN_MISSING);
        }
    }
}