From 831425d5af51bdd1511a98c43e6355f969d55fe6 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Thu, 13 Jun 2013 04:32:35 -0500
Subject: [PATCH] add example online game created with blessed.

---
 example/ping | 439 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 439 insertions(+)
 create mode 100755 example/ping

diff --git a/example/ping b/example/ping
new file mode 100755
index 0000000..cc505f4
--- /dev/null
+++ b/example/ping
@@ -0,0 +1,439 @@
+#!/usr/bin/env node
+
+/**
+ * ping
+ * https://github.com/chjj/blessed
+ * Copyright (c) 2013, Christopher Jeffrey (MIT License)
+ * Online (ping)pong in your terminal.
+ */
+
+// Example Usage:
+// Server: $ ./example/ping 3000
+// Client: $ ./example/ping 127.0.0.1 3000
+// Demo: $ ./example/ping
+
+process.title = 'ping';
+
+if (/^(-h|--help|-\?)$/.test(process.argv[2])) {
+  console.log('node-ping');
+  console.log('Example Usage:');
+  console.log('Server: $ node-ping 3000');
+  console.log('Client: $ node-ping 127.0.0.1 3000');
+  console.log('Demo: $ node-ping');
+  return process.exit(0);
+}
+
+var blessed = require('blessed')
+  , program = blessed()
+  , nssocket;
+
+try {
+  nssocket = require('nssocket');
+} catch (e) {
+  ;
+}
+
+var server
+  , socket;
+
+/**
+ * Screen Layout
+ */
+
+var screen = new blessed.Screen({
+  program: program
+});
+
+var table = new blessed.Box({
+  left: 0,
+  top: 0,
+  width: screen.width,
+  height: screen.height
+});
+
+var ball = new blessed.Box({
+  width: 1,
+  height: 1,
+  bg: 'white',
+  top: 0,
+  left: 0
+});
+
+var lpaddle = new blessed.Box({
+  width: 1,
+  height: 3,
+  bg: 'yellow',
+  top: 0,
+  left: 0
+});
+
+var rpaddle = new blessed.Box({
+  width: 1,
+  height: 3,
+  bg: 'yellow',
+  top: 0,
+  right: 0
+});
+
+var score = new blessed.Box({
+  top: 0,
+  left: 4,
+  height: 3,
+  width: 20,
+  bold: true
+});
+
+score.lwins = 0;
+score.rwins = 0;
+
+var net = new blessed.Box({
+  width: 1,
+  height: '100%',
+  bg: 'yellow',
+  top: 0,
+  left: 'center'
+});
+
+var message = new blessed.Box({
+  width: '50%',
+  height: 3,
+  border: {
+    type: 'ascii'
+  },
+  top: 'center',
+  left: 'center'
+});
+
+var text = new blessed.Box({
+  top: 'center',
+  left: 1,
+  right: 1,
+  height: 1,
+  content: 'Waiting for players to connect...'
+});
+
+message.append(text);
+
+screen.append(table);
+
+table.append(score);
+table.append(lpaddle);
+table.append(rpaddle);
+table.append(net);
+table.append(ball);
+table.append(message);
+
+screen.on('resize', function() {
+  table.width = screen.width;
+  table.height = screen.height;
+  [ball, lpaddle, rpaddle].forEach(function(el) {
+    if (el.rbottom < 0) el.rtop = table.height - 1 - el.height;
+    if (el.rright < 0) el.rleft = table.width - 1;
+  });
+  screen.render();
+  sync();
+});
+
+/**
+ * Options
+ */
+
+ball.speed = 2;
+ball.unpredictable = true;
+lpaddle.speed = 2;
+rpaddle.speed = 2;
+
+/**
+ * Game
+ */
+
+function sync() {
+  if (!socket) return;
+  socket.send(['update'], {
+    table: { width: table.width, height: table.height },
+    lpaddle: { rleft: lpaddle.rleft, rtop: lpaddle.rtop, speed: lpaddle.speed },
+    rpaddle: { rleft: rpaddle.rleft, rtop: rpaddle.rtop, speed: rpaddle.speed },
+    score: { lwins: score.lwins, rwins: score.rwins }
+  });
+}
+
+function reset() {
+  text.setContent('Waiting for players to connect...');
+  message.hide();
+  ball.moving = true;
+  ball.direction = 'right';
+  ball.angle = 'down';
+  ball.rtop = 1;
+  ball.rleft = 1;
+  lpaddle.rtop = 0;
+  rpaddle.rtop = 0;
+
+  score.setContent('Score: ' + score.lwins + ' | ' + score.rwins);
+
+  rpaddle.movable = true;
+
+  screen.render();
+  if (server && socket) {
+    socket.send(['reset']);
+  }
+}
+
+function rand(min, max) {
+  return Math.floor(Math.random() * (max - min + 1)) + min;
+}
+
+function startGame() {
+  reset();
+
+  if (startGame._bound) return;
+  startGame._bound = true;
+
+  screen.on('keypress', function(ch, key) {
+    if (!ball.moving) return;
+    if (key.name === 'up' || key.name === 'k') {
+      if (socket) socket.send(['up']);
+      if (lpaddle.rtop > 0) lpaddle.rtop -= lpaddle.speed;
+      if (!socket) if (rpaddle.rtop > 0) rpaddle.rtop -= rpaddle.speed;
+      if (lpaddle.rtop < 0) lpaddle.rtop = 0;
+      if (rpaddle.rtop < 0) rpaddle.rtop = 0;
+      screen.render();
+    } else if (key.name === 'down' || key.name === 'j') {
+      if (socket) socket.send(['down']);
+      if (lpaddle.rbottom > 0) lpaddle.rtop += lpaddle.speed;
+      if (!socket) if (rpaddle.rbottom > 0) rpaddle.rtop += rpaddle.speed;
+      if (lpaddle.rbottom < 0) lpaddle.rtop = table.height - lpaddle.height - 1;
+      if (rpaddle.rbottom < 0) rpaddle.rbottom = table.height - rpaddle.height - 1;
+      screen.render();
+    }
+  });
+
+  setInterval(function() {
+    if (!ball.moving) return;
+    if (ball.direction === 'right') {
+      if (ball.rright > 1) {
+        ball.rleft += ball.speed;
+      } else {
+        if (ball.rtop >= rpaddle.rtop && ball.rtop <= rpaddle.rtop + rpaddle.height) {
+          ball.direction = 'left';
+          ball.rleft -= ball.speed;
+
+          ball.rleft -= rand(0, 3);
+          if (ball.angle === 'down') ball.rtop += rand(0, 3);
+          else if (ball.angle === 'up') ball.rtop -= rand(0, 3);
+        } else {
+          // Right loses
+          score.lwins++;
+          ball.rleft = table.width - 1;
+          if (socket) socket.send(['lose']);
+          ball.moving = false;
+          text.setContent('Right player loses!');
+          message.show();
+          setTimeout(reset, 3000);
+          screen.render();
+          return;
+        }
+      }
+      if (ball.rright < 1) ball.rleft = table.width - 2;
+    } else if (ball.direction === 'left') {
+      if (ball.rleft > 1) {
+        ball.rleft -= ball.speed;
+      } else {
+        if (ball.rtop >= lpaddle.rtop && ball.rtop <= lpaddle.rtop + lpaddle.height) {
+          ball.direction = 'right';
+          ball.rleft += ball.speed;
+
+          ball.rleft += rand(0, 3);
+          if (ball.angle === 'down') ball.rtop += rand(0, 3);
+          else if (ball.angle === 'up') ball.rtop -= rand(0, 3);
+        } else {
+          // Left loses
+          score.rwins++;
+          ball.rleft = 0;
+          if (socket) socket.send(['win']);
+          ball.moving = false;
+          text.setContent('Left player loses!');
+          message.show();
+          setTimeout(reset, 3000);
+          screen.render();
+          return;
+        }
+      }
+      if (ball.rleft < 1) ball.rleft = 1;
+    }
+    if (ball.angle === 'down') {
+      if (ball.rbottom > 0) {
+        ball.rtop++;
+        if (ball.unpredictable) ball.rtop += rand(0, 3);
+      } else {
+        ball.angle = 'up';
+        ball.rtop--;
+      }
+    } else if (ball.angle === 'up') {
+      if (ball.rtop > 0) {
+        ball.rtop--;
+        if (ball.unpredictable) ball.rtop -= rand(0, 3);
+      } else {
+        ball.angle = 'down';
+        ball.rtop++;
+      }
+    }
+    if (ball.rtop < 0) ball.rtop = 0;
+    if (ball.rbottom < 0) ball.rtop = table.height - 1;
+    if (socket) socket.send(['ball'], { rleft: ball.rleft, rtop: ball.rtop });
+    screen.render();
+  }, 100);
+}
+
+function startServer() {
+  server = nssocket.createServer({}, function(socket_) {
+    socket = socket_;
+
+    sync();
+
+    socket.data(['up'], function() {
+      if (!ball.moving) return;
+      if (rpaddle.rtop > 0) rpaddle.rtop -= rpaddle.speed;
+      screen.render();
+    });
+
+    socket.data(['down'], function() {
+      if (!ball.moving) return;
+      if (rpaddle.rtop < table.height - 1) rpaddle.rtop += rpaddle.speed;
+      screen.render();
+    });
+
+    socket.on('error', function() {
+      socket = null;
+      reset();
+      ball.moving = false;
+      message.show();
+      screen.render();
+    });
+
+    startGame();
+  });
+
+  server.listen(+process.argv[2]);
+}
+
+function startClient() {
+  var socket = new nssocket.NsSocket({
+    reconnect: true,
+    maxRetries: Infinity,
+    retryInterval: 5000
+  });
+
+  socket.connect(+process.argv[3], process.argv[2]);
+
+  screen.on('keypress', function(ch, key) {
+    if (!rpaddle.movable) return;
+    if (key.name === 'up' || key.name === 'k') {
+      socket.send(['up']);
+      if (rpaddle.rtop > 0) rpaddle.rtop -= rpaddle.speed;
+      if (rpaddle.rtop < 0) rpaddle.rtop = 0;
+      screen.render();
+    } else if (key.name === 'down' || key.name === 'j') {
+      socket.send(['down']);
+      if (rpaddle.rbottom > 0) rpaddle.rtop += rpaddle.speed;
+      if (rpaddle.rbottom < 0) rpaddle.rtop = table.height - rpaddle.height - 1;
+      screen.render();
+    }
+  });
+
+  socket.data(['up'], function() {
+    if (lpaddle.rtop > 0) lpaddle.rtop -= lpaddle.speed;
+    screen.render();
+  });
+
+  socket.data(['down'], function() {
+    if (lpaddle.rtop < table.height - 1) lpaddle.rtop += lpaddle.speed;
+    screen.render();
+  });
+
+  socket.data(['ball'], function(data) {
+    ball.rleft = data.rleft;
+    ball.rtop = data.rtop;
+    screen.render();
+  });
+
+  socket.data(['update'], function(data) {
+    if (data.lpaddle) {
+      lpaddle.rleft = data.lpaddle.rleft;
+      lpaddle.rtop = data.lpaddle.rtop;
+      lpaddle.speed = data.lpaddle.speed;
+    }
+
+    if (data.rpaddle) {
+      rpaddle.rleft = data.rpaddle.rleft;
+      rpaddle.rtop = data.rpaddle.rtop;
+      rpaddle.speed = data.rpaddle.speed;
+    }
+
+    if (data.ball) {
+      ball.moving = data.ball.moving;
+      ball.rleft = data.ball.rleft;
+      ball.rtop = data.ball.rtop;
+    }
+
+    if (data.table) {
+      table.height = data.table.height;
+      table.width = data.table.width;
+    }
+
+    if (data.score) {
+      score.lwins = data.score.lwins;
+      score.rwins = data.score.rwins;
+    }
+
+    screen.render();
+  });
+
+  socket.data(['win'], function() {
+    rpaddle.movable = false;
+    score.rwins++;
+    text.setContent('Left player loses!');
+    message.show();
+    screen.render();
+  });
+
+  socket.data(['lose'], function() {
+    rpaddle.movable = false;
+    score.lwins++;
+    text.setContent('Right player loses!');
+    message.show();
+    screen.render();
+  });
+
+  socket.data(['reset'], reset);
+
+  reset();
+}
+
+/**
+ * Main
+ */
+
+function main() {
+  screen.on('keypress', function(ch, key) {
+    if (key.name === 'q' || key.name === 'escape') {
+      return process.exit(0);
+    }
+  });
+
+  screen.render();
+
+  // Demo Mode / Single Player
+  if (!nssocket || !process.argv[2]) return startGame();
+
+  // Server Mode
+  if (!process.argv[3]) return startServer();
+
+  // Client Mode
+  if (process.argv[2] && process.argv[3]) return startClient();
+}
+
+/**
+ * Execute
+ */
+
+main();