6 <pre id="terminal" style="display: inline-block; color: white; background-color: black;"></pre>
9 let websocket_location = "ws://localhost:8000";
14 initialize: function() {
15 this.pre_el = document.getElementById("terminal");
18 for (let y = 0, x = 0; y <= this.rows; x++) {
22 this.content.push(line);
33 for (let y = 0; y < this.rows; y++) {
34 let line = this.content[y].join('');
35 pre_string += line + '\n';
37 this.pre_el.textContent = pre_string;
39 write: function(start_y, start_x, msg) {
40 for (let x = start_x, i = 0; x < this.cols && i < msg.length; x++, i++) {
41 this.content[start_y][x] = msg[i];
44 drawBox: function(start_y, start_x, height, width) {
45 let end_y = start_y + height;
46 let end_x = start_x + width;
47 for (let y = start_y, x = start_x;; x++) {
55 this.content[y][x] = ' ';
61 tokenize: function(str) {
66 for (let i = 0; i < str.length; i++) {
72 } else if (c == '\\') {
74 } else if (c == '"') {
79 } else if (c == '"') {
81 } else if (c === ' ') {
82 if (token.length > 0) {
90 if (token.length > 0) {
95 parse_yx(position_string) {
96 let coordinate_strings = position_string.split(',')
97 let position = [0, 0];
98 position[0] = parseInt(coordinate_strings[0].slice(2));
99 position[1] = parseInt(coordinate_strings[1].slice(2));
105 draw_history: function() {
106 terminal.drawBox(1, terminal.cols / 2, terminal.rows - 2, terminal.cols / 2);
108 for (let line of chat.history) {
109 terminal.write(terminal.rows - 2 - i, terminal.cols / 2, line);
113 draw_map: function() {
114 terminal.drawBox(0, 0, terminal.rows, terminal.cols / 2);
117 for (let i = 0, j = 0; i < game.map.length; i++, j++) {
118 if (j == game.map_size[1]) {
119 map_lines.push(line);
123 line.push(game.map[i]);
125 map_lines.push(line);
126 let player_position = [0,0];
127 for (const thing_id in game.things) {
128 let t = game.things[thing_id];
129 map_lines[t[0]][t[1]] = '@';
130 if (game.player_id == thing_id) {
134 let offset = [(terminal.rows / 2) - player_position[0],
135 terminal.cols / 4 - player_position[1]];
136 for (let term_y = offset[0], map_y = 0;
137 term_y < terminal.rows && map_y < game.map_size[0];
140 let to_draw = map_lines[map_y].join('').slice(0, terminal.cols / 2 - offset[1]);
141 terminal.write(term_y, offset[1], to_draw);
145 draw_turn_line: function(n) {
146 terminal.drawBox(0, terminal.cols / 2, 1, terminal.cols / 2);
147 terminal.write(0, terminal.cols / 2, 'turn: ' + game.turn);
149 draw_input_line: function() {
150 terminal.drawBox(terminal.rows - 1, terminal.cols / 2, 1, terminal.cols / 2);
151 terminal.write(terminal.rows - 1, terminal.cols / 2, chat.input_line);
153 log_msg: function(msg, indent=0) {
154 let line_length = (terminal.cols / 2) - indent;
156 for (let i = 0, x = 0; i < msg.length; i++, x++) {
157 if (x >= line_length) {
158 chat.history.unshift(' '.repeat(indent) + chunk);
164 chat.history.unshift(' '.repeat(indent) + chunk);
165 while (chat.history.length > terminal.rows - 2) {
170 refresh: function() {
188 terminal.initialize();
191 tui.draw_turn_line();
193 tui.draw_input_line();
196 tui.log_msg("basic commands:", 1);
197 tui.log_msg("LOGIN USER - register as USER", 3);
198 tui.log_msg("ALL TEXT - send TEXT to all users", 3);
199 tui.log_msg("QUERY USER TEXT - send TEXT to USER", 3);
201 tui.log_msg("Use arrow keys to move your avatar. You can only move over \".\" map cells.", 1);
203 tui.log_msg("Use double quotes for strings that contain whitespace, escape them with \\.", 1);
205 tui.log_msg("To change the map cell you are standing on, type the desired ASCII character into the prompt and hit Return.", 1);
207 tui.log_msg("more commands:", 1);
208 tui.log_msg("FLATTEN - transform surrounding map cells to \".\" ones", 3);
211 let websocket = new WebSocket(websocket_location);
212 websocket.onmessage = function (event) {
213 let tokens = parser.tokenize(event.data);
214 if (tokens[0] === 'TURN') {
216 game.turn = parseInt(tokens[1]);
217 } else if (tokens[0] === 'THING_POS') {
218 game.things[tokens[1]] = parser.parse_yx(tokens[2]);
219 } else if (tokens[0] === 'MAP') {
220 game.map_size = parser.parse_yx(tokens[1]);
222 } else if (tokens[0] === 'GAME_STATE_COMPLETE') {
223 tui.draw_turn_line();
226 } else if (tokens[0] === 'LOG') {
227 tui.log_msg(tokens[1], 1);
229 } else if (tokens[0] === 'PLAYER_ID') {
230 game.player_id = parseInt(tokens[1]);
231 } else if (tokens[0] === 'META') {
232 tui.log_msg(tokens[1]);
234 } else if (tokens[0] === 'UNHANDLED_INPUT') {
235 tui.log_msg('unknown command');
237 } else if (tokens[0] === 'ARGUMENT_ERROR') {
238 tui.log_msg('syntax error: ' + tokens[1]);
240 } else if (tokens[0] === 'GAME_ERROR') {
241 tui.log_msg('game error: ' + tokens[1]);
243 } else if (tokens[0] === 'PONG') {
246 tui.log_msg('unhandled input: ' + event.data);
251 document.addEventListener('keydown', (event) => {
252 if (chat.input_line === '') {
253 tui.draw_input_line();
256 if (event.key && event.key.length === 1) {
257 chat.input_line += event.key;
258 tui.draw_input_line();
260 } else if (event.key === 'Backspace') {
261 chat.input_line = chat.input_line.slice(0, -1);
262 tui.draw_input_line();
264 } else if (event.key === 'Enter') {
265 if (chat.input_line.length === 1) {
266 websocket.send("TASK:WRITE " + chat.input_line);
267 } else if (chat.input_line.trimEnd() === 'FLATTEN') {
268 websocket.send("TASK:FLATTEN_SURROUNDINGS");
270 websocket.send(chat.input_line);
272 chat.input_line = '';
273 tui.draw_input_line();
274 } else if (event.key === 'ArrowLeft') {
275 websocket.send('TASK:MOVE LEFT');
276 } else if (event.key === 'ArrowRight') {
277 websocket.send('TASK:MOVE RIGHT');
278 } else if (event.key === 'ArrowUp') {
279 websocket.send('TASK:MOVE UP');
280 } else if (event.key === 'ArrowDown') {
281 websocket.send('TASK:MOVE DOWN');
285 window.setInterval(function() { websocket.send('PING') }, 30000);