113 lines
3.6 KiB
Java
113 lines
3.6 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package samples.websocket.snake;
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import java.awt.Color;
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import java.util.Iterator;
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import java.util.Random;
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import java.util.concurrent.atomic.AtomicInteger;
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import org.springframework.web.socket.CloseStatus;
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import org.springframework.web.socket.TextMessage;
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import org.springframework.web.socket.WebSocketSession;
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import org.springframework.web.socket.handler.TextWebSocketHandler;
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public class SnakeWebSocketHandler extends TextWebSocketHandler {
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public static final int PLAYFIELD_WIDTH = 640;
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public static final int PLAYFIELD_HEIGHT = 480;
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public static final int GRID_SIZE = 10;
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private static final AtomicInteger snakeIds = new AtomicInteger(0);
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private static final Random random = new Random();
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private final int id;
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private Snake snake;
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public static String getRandomHexColor() {
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float hue = random.nextFloat();
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// sat between 0.1 and 0.3
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float saturation = (random.nextInt(2000) + 1000) / 10000f;
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float luminance = 0.9f;
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Color color = Color.getHSBColor(hue, saturation, luminance);
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return '#' + Integer.toHexString((color.getRGB() & 0xffffff) | 0x1000000)
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.substring(1);
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}
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public static Location getRandomLocation() {
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int x = roundByGridSize(random.nextInt(PLAYFIELD_WIDTH));
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int y = roundByGridSize(random.nextInt(PLAYFIELD_HEIGHT));
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return new Location(x, y);
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}
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private static int roundByGridSize(int value) {
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value = value + (GRID_SIZE / 2);
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value = value / GRID_SIZE;
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value = value * GRID_SIZE;
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return value;
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}
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public SnakeWebSocketHandler() {
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this.id = snakeIds.getAndIncrement();
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}
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@Override
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public void afterConnectionEstablished(WebSocketSession session) throws Exception {
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this.snake = new Snake(this.id, session);
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SnakeTimer.addSnake(this.snake);
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StringBuilder sb = new StringBuilder();
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for (Iterator<Snake> iterator = SnakeTimer.getSnakes().iterator(); iterator
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.hasNext();) {
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Snake snake = iterator.next();
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sb.append(String.format("{id: %d, color: '%s'}",
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Integer.valueOf(snake.getId()), snake.getHexColor()));
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if (iterator.hasNext()) {
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sb.append(',');
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}
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}
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SnakeTimer
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.broadcast(String.format("{'type': 'join','data':[%s]}", sb.toString()));
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}
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@Override
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protected void handleTextMessage(WebSocketSession session, TextMessage message)
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throws Exception {
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String payload = message.getPayload();
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if ("west".equals(payload)) {
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this.snake.setDirection(Direction.WEST);
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}
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else if ("north".equals(payload)) {
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this.snake.setDirection(Direction.NORTH);
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}
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else if ("east".equals(payload)) {
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this.snake.setDirection(Direction.EAST);
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}
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else if ("south".equals(payload)) {
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this.snake.setDirection(Direction.SOUTH);
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}
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}
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@Override
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public void afterConnectionClosed(WebSocketSession session, CloseStatus status)
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throws Exception {
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SnakeTimer.removeSnake(this.snake);
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SnakeTimer.broadcast(String.format("{'type': 'leave', 'id': %d}",
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Integer.valueOf(this.id)));
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}
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}
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