GetSlideInfoReplyMessage.java

package org.bigbluebutton.common.messages;

import java.util.HashMap;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;


public class GetSlideInfoReplyMessage implements ISubscribedMessage {
	public static final String GET_SLIDE_INFO = "get_slide_info_message";
	public final String VERSION = "0.0.1";

	public final String meetingId;
	public final String requesterId;
	public final int xOffset;
	public final int yOffset;
	public final int widthRatio;
	public final int heightRatio;
	

	public GetSlideInfoReplyMessage(String meetingId, String requesterId,
			int xOffset, int yOffset, int widthRatio, int heightRatio) {
		this.meetingId = meetingId;
		this.requesterId = requesterId;
		this.xOffset = xOffset;
		this.yOffset = yOffset;
		this.widthRatio = widthRatio;
		this.heightRatio = heightRatio;
	}

	public String toJson() {
		HashMap<String, Object> payload = new HashMap<String, Object>();
		payload.put(Constants.MEETING_ID, meetingId);
		payload.put(Constants.REQUESTER_ID, requesterId);
		payload.put(Constants.X_OFFSET, xOffset);
		payload.put(Constants.Y_OFFSET, yOffset);
		payload.put(Constants.WIDTH_RATIO, widthRatio);
		payload.put(Constants.HEIGHT_RATIO, heightRatio);

		java.util.HashMap<String, Object> header = MessageBuilder.buildHeader(GET_SLIDE_INFO, VERSION, null);

		return MessageBuilder.buildJson(header, payload);
	}

	public static GetSlideInfoReplyMessage fromJson(String message) {
		JsonParser parser = new JsonParser();
		JsonObject obj = (JsonObject) parser.parse(message);

		if (obj.has("header") && obj.has("payload")) {
			JsonObject header = (JsonObject) obj.get("header");
			JsonObject payload = (JsonObject) obj.get("payload");

			if (header.has("name")) {
				String messageName = header.get("name").getAsString();
				if (GET_SLIDE_INFO.equals(messageName)) {
					if (payload.has(Constants.MEETING_ID)
							&& payload.has(Constants.REQUESTER_ID)
							&& payload.has(Constants.X_OFFSET)
							&& payload.has(Constants.Y_OFFSET)
							&& payload.has(Constants.WIDTH_RATIO)
							&& payload.has(Constants.HEIGHT_RATIO)) {
						String meetingId = payload.get(Constants.MEETING_ID).getAsString();
						String requesterId = payload.get(Constants.REQUESTER_ID).getAsString();
						int xOffset = payload.get(Constants.X_OFFSET).getAsInt();
						int yOffset = payload.get(Constants.Y_OFFSET).getAsInt();
						int widthRatio = payload.get(Constants.WIDTH_RATIO).getAsInt();
						int heightRatio = payload.get(Constants.HEIGHT_RATIO).getAsInt();

						return new GetSlideInfoReplyMessage(meetingId, requesterId,
								xOffset, yOffset, widthRatio, heightRatio);
					}
				}
			}
		}
		return null;
	}
}