git.r.bdr.sh - rbdr/tomato-sauce/blob - 0001_BASIC.JS

   1 #!/usr/bin/env node
   2
   3 'use strict';
   4
   5 /* eslint no-console: 0 */
   6
   7 const Net = require('net');
   8
   9 const kPort = 9999;
  10 const kEscape = new Buffer([0xFF, 0xF4, 0XFF, 0xFD, 0x06]); // IAC IP IAC DO TIMING_MARK
  11 const kNAWSRequest = new Buffer([0xFF, 0xFD, 0X1F]); // IAC DO NAWS
  12 const kNAWSResponse = new Buffer([0xFF, 0xFB, 0X1F, 0xFF, 0xFA, 0X1F]); // IAC WILL NAWS IAC SB NAWS
  13 const kFrequency = 333;
  14 const kModulationSpeed = 5;
  15
  16 const run = function run () {
  17   const server = startServer();
  18   bindEvents(server);
  19 };
  20
  21 const startServer = function startServer () {
  22   const server = Net.createServer();
  23   server.listen(kPort, function () {
  24     const address = server.address();
  25     console.log(`The server is now listening on ${address.address}:${address.port}`);
  26   });
  27
  28   return server;
  29 };
  30
  31 const bindEvents = function bindEvents (server) {
  32   server.on('error', function (err) {
  33     console.error(err.stack || err.message || err);
  34     process.exit(1);
  35   });
  36
  37   server.on('connection', function (socket) {
  38     let connectionData = {
  39       width: null,
  40       height: null,
  41       modulation: 0,
  42       screen: screens[Math.floor(Math.random() * screens.length)],
  43       mode: modes[Math.floor(Math.random() * modes.length)]
  44     };
  45     let interval = null;
  46
  47     socket.write(kNAWSRequest);
  48
  49     // Currently this is naive, we should parse the buffer properly.
  50     socket.on('data', function (data) {
  51
  52       // Only send message if NAWS is supported.
  53       if (data.slice(0, 6).compare(kNAWSResponse) === 0) {
  54         connectionData.width = parse16BitBuffer(data.slice(6, 8));
  55         connectionData.height = parse16BitBuffer(data.slice(8, 10));
  56
  57         socket.write('\x1B[2J'); // Clear the Screen (CSI 2 J)
  58         interval = setInterval(writeMessage.bind(null, socket, connectionData), kFrequency);
  59       }
  60
  61       if (data.compare(kEscape) === 0) {
  62         socket.write('\n');
  63         clearInterval(interval);
  64         socket.end();
  65       }
  66     });
  67   });
  68 };
  69
  70 const writeMessage = function writeMessage (socket, connectionData) {
  71   let message = '';
  72   message += '\x1B[1;1H'; // Move cursor to top left (CSI 1;1 H)
  73   message += connectionData.screen(connectionData.modulation, connectionData.width, connectionData.height, getANSIColor.bind(null, connectionData.mode));
  74
  75   connectionData.modulation = connectionData.modulation + kModulationSpeed;
  76   if (connectionData.modulation === 255) {
  77     connectionData.modulation = 0;
  78   }
  79
  80   socket.write(message);
  81   // return '\x1B[2J*** SUCCESSS ***';
  82 };
  83
  84 const parse16BitBuffer = function parse16BitBuffer (buffer) {
  85   return buffer[0] * 256 + buffer[1];
  86 };
  87
  88 // SCREENS
  89
  90 const fillScreen = function fillScreen (modulation, width, height, getANSIColor) {
  91   let response = '';
  92
  93   for (let i = 0; i < height; i++) {
  94     for (let j = 0; j < width; j++) {
  95       let red = ((modulation + i) * 255 / height) % 255;
  96       let blue = ((modulation + j) * 255 / width) % 255;
  97       let green = ((modulation + i * j) * 255 / (width * height)) % 255;
  98
  99       response = response + getANSIColor(red, blue, green);
 100       response = response + ' ';
 101     }
 102
 103     if (i < height - 1) {
 104       response = response + '\n';
 105     }
 106   }
 107
 108   return response;
 109 };
 110
 111 const randomScreen = function randomScreen (modulation, width, height, getANSIColor) {
 112   let response = '';
 113
 114   for (let i = 0; i < height; i++) {
 115     for (let j = 0; j < width; j++) {
 116       let red = Math.floor(Math.random() * 255);
 117       let blue = Math.floor(Math.random() * 255);
 118       let green = Math.floor(Math.random() * 255);
 119
 120       response = response + getANSIColor(red, blue, green);
 121       response = response + ' ';
 122     }
 123
 124     if (i < height - 1) {
 125       response = response + '\n';
 126     }
 127   }
 128
 129   return response;
 130 };
 131
 132 const mirrorScreen = function mirrorScreen (modulation, width, height, getANSIColor) {
 133   let response = [];
 134
 135   let scale = 2 + Math.round(Math.random() * 4);
 136   let scaledHeight = Math.floor(height / scale);
 137   let scaledWidth = Math.floor(width / scale);
 138
 139   for (let i = 0; i < scaledHeight; i++) {
 140     let row = [];
 141     for (let j = 0; j < scaledWidth; j++) {
 142       let red = ((modulation + i) * 255 / height) % 255;
 143       let blue = ((modulation + j) * 255 / width) % 255;
 144       let green = ((modulation + i * j) * 255 / (width * height)) % 255;
 145
 146       let cell = [getANSIColor(red, blue, green), ' '];
 147       row.push(cell.join(''));
 148     }
 149
 150     let rowText = '';
 151     for (let j = 0; j < scale; j++) {
 152       rowText += row.reverse().join('');
 153     }
 154
 155     for (let j = 1; j < scale; j++) {
 156       response[j * i] = rowText;
 157       response[(height - 1 - (j * i))] = rowText;
 158     }
 159   }
 160
 161   return response.join('\n');
 162 };
 163
 164 const randomSprinkles = function mirrorRandomScreen (modulation, width, height, getANSIColor) {
 165   let response = '';
 166
 167   let maxSprinkleCount = (width * height) / 2;
 168   let minSprinkleCount = (width * height) / 8;
 169   let sprinkleCount = Math.round(Math.random() * (maxSprinkleCount - minSprinkleCount)) + minSprinkleCount;
 170
 171   let red = Math.floor(Math.random() * 255);
 172   let blue = Math.floor(Math.random() * 255);
 173   let green = Math.floor(Math.random() * 255);
 174
 175   for (let i = 0; i < sprinkleCount; i++) {
 176     let x = Math.round(Math.random() * (width - 1)) + 1;
 177     let y = Math.round(Math.random() * (height - 1)) + 1;
 178
 179     let position = `\x1B[${y};${x}H`; // Move cursor to y,x (CSI y;x H)
 180
 181     response += `${position}${getANSIColor(red, blue, green)} `;
 182   }
 183
 184   return response;
 185 };
 186
 187 const circlesScreen = function circlesScreen (modulation, width, height, getANSIColor) {
 188   let response = [];
 189
 190   let circles = width > height ? height : width;
 191
 192   for (let i = 0; i < circles; i++) {
 193     let centerX = Math.round(width / 2) + 1;
 194     let centerY = Math.round(height / 2) + 1;
 195
 196     let red = Math.floor(Math.random() * 255);
 197     let blue = Math.floor(Math.random() * 255);
 198     let green = Math.floor(Math.random() * 255);
 199
 200     for (let j = 0; j < 180; j++) {
 201       let angle =  2 * j * (Math.PI / 180);
 202       let x = Math.round(centerX + Math.sin(angle) * i);
 203       let y = Math.round(centerY + Math.cos(angle) * i);
 204
 205       if (x <= width && x > 0 && y <= height && y > 0) {
 206         let position = `\x1B[${y};${x}H`; // Move cursor to y,x (CSI y;x H)
 207         response += `${position}${getANSIColor(red, blue, green)} `;
 208       }
 209     }
 210   }
 211
 212   return response;
 213 };
 214
 215 // instead of binding themode, return the one funciton...
 216 const getANSIColor = function getANSIColor (mode, red, blue, green) {
 217   let colorCode;
 218
 219   if (mode === '256') {
 220     let redValue = Math.round(red * 5 / 255);
 221     let blueValue = Math.round(blue * 5 / 255);
 222     let greenValue = Math.round(green * 5 / 255);
 223
 224     let colorNumber = 16 + 36 * redValue + 6 * greenValue + blueValue;
 225
 226     colorCode = `\x1B[48;5;${colorNumber}m`;
 227   } else if (mode === 'ansi') {
 228     let colorOffset = Math.round((red + blue + green) * 7 / (255 * 3));
 229
 230     let colorNumber = 40 + colorOffset;
 231
 232     colorCode = `\x1B[${colorNumber}m`;
 233   } else{
 234     colorCode = `\x1B[48;2;${Math.round(red)};${Math.round(green)};${Math.round(blue)}m`;
 235   }
 236
 237   return colorCode;
 238 };
 239
 240 const screens = [fillScreen, randomScreen, mirrorScreen, randomSprinkles, circlesScreen];
 241 const modes = ['full', '256', 'ansi'];
 242
 243 run();