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| 1 | -- SPDX-FileCopyrightText: 2017 Daniel Ratcliffe | |
| 2 | -- | |
| 3 | -- SPDX-License-Identifier: LicenseRef-CCPL | |
| 4 | ||
| 5 | local tArgs = { ... }
| |
| 6 | ||
| 7 | local function printUsage() | |
| 8 | local programName = arg[0] or fs.getName(shell.getRunningProgram()) | |
| 9 | print("Usages:")
| |
| 10 | print(programName .. " host <hostname>") | |
| 11 | print(programName .. " join <hostname> <nickname>") | |
| 12 | end | |
| 13 | ||
| 14 | local sOpenedModem = nil | |
| 15 | local function openModem() | |
| 16 | for _, sModem in ipairs(peripheral.getNames()) do | |
| 17 | if peripheral.getType(sModem) == "modem" then | |
| 18 | if not rednet.isOpen(sModem) then | |
| 19 | rednet.open(sModem) | |
| 20 | sOpenedModem = sModem | |
| 21 | end | |
| 22 | return true | |
| 23 | end | |
| 24 | end | |
| 25 | print("No modems found.")
| |
| 26 | return false | |
| 27 | end | |
| 28 | ||
| 29 | local function closeModem() | |
| 30 | if sOpenedModem ~= nil then | |
| 31 | rednet.close(sOpenedModem) | |
| 32 | sOpenedModem = nil | |
| 33 | end | |
| 34 | end | |
| 35 | ||
| 36 | -- Colours | |
| 37 | local highlightColour, textColour | |
| 38 | if term.isColour() then | |
| 39 | textColour = colours.white | |
| 40 | highlightColour = colours.yellow | |
| 41 | else | |
| 42 | textColour = colours.white | |
| 43 | highlightColour = colours.white | |
| 44 | end | |
| 45 | ||
| 46 | local sCommand = tArgs[1] | |
| 47 | if sCommand == "host" then | |
| 48 | -- "chat host" | |
| 49 | -- Get hostname | |
| 50 | local sHostname = tArgs[2] | |
| 51 | if sHostname == nil then | |
| 52 | printUsage() | |
| 53 | return | |
| 54 | end | |
| 55 | ||
| 56 | -- Host server | |
| 57 | if not openModem() then | |
| 58 | return | |
| 59 | end | |
| 60 | rednet.host("chat", sHostname)
| |
| 61 | print("0 users connected.")
| |
| 62 | ||
| 63 | local tUsers = {}
| |
| 64 | local nUsers = 0 | |
| 65 | local function send(sText, nUserID) | |
| 66 | if nUserID then | |
| 67 | local tUser = tUsers[nUserID] | |
| 68 | if tUser then | |
| 69 | rednet.send(tUser.nID, {
| |
| 70 | sType = "text", | |
| 71 | nUserID = nUserID, | |
| 72 | sText = sText, | |
| 73 | }, "chat") | |
| 74 | end | |
| 75 | else | |
| 76 | for nUserID, tUser in pairs(tUsers) do | |
| 77 | rednet.send(tUser.nID, {
| |
| 78 | sType = "text", | |
| 79 | nUserID = nUserID, | |
| 80 | sText = sText, | |
| 81 | }, "chat") | |
| 82 | end | |
| 83 | end | |
| 84 | end | |
| 85 | ||
| 86 | -- Setup ping pong | |
| 87 | local tPingPongTimer = {}
| |
| 88 | local function ping(nUserID) | |
| 89 | local tUser = tUsers[nUserID] | |
| 90 | rednet.send(tUser.nID, {
| |
| 91 | sType = "ping to client", | |
| 92 | nUserID = nUserID, | |
| 93 | }, "chat") | |
| 94 | ||
| 95 | local timer = os.startTimer(15) | |
| 96 | tUser.bPingPonged = false | |
| 97 | tPingPongTimer[timer] = nUserID | |
| 98 | end | |
| 99 | ||
| 100 | local function printUsers() | |
| 101 | local _, y = term.getCursorPos() | |
| 102 | term.setCursorPos(1, y - 1) | |
| 103 | term.clearLine() | |
| 104 | if nUsers == 1 then | |
| 105 | print(nUsers .. " user connected.") | |
| 106 | else | |
| 107 | print(nUsers .. " users connected.") | |
| 108 | end | |
| 109 | end | |
| 110 | ||
| 111 | -- Handle messages | |
| 112 | local ok, error = pcall(parallel.waitForAny, | |
| 113 | function() | |
| 114 | while true do | |
| 115 | local _, timer = os.pullEvent("timer")
| |
| 116 | local nUserID = tPingPongTimer[timer] | |
| 117 | if nUserID and tUsers[nUserID] then | |
| 118 | local tUser = tUsers[nUserID] | |
| 119 | if tUser then | |
| 120 | if not tUser.bPingPonged then | |
| 121 | send("* " .. tUser.sUsername .. " has timed out")
| |
| 122 | tUsers[nUserID] = nil | |
| 123 | nUsers = nUsers - 1 | |
| 124 | printUsers() | |
| 125 | else | |
| 126 | ping(nUserID) | |
| 127 | end | |
| 128 | end | |
| 129 | end | |
| 130 | end | |
| 131 | end, | |
| 132 | function() | |
| 133 | while true do | |
| 134 | local tCommands | |
| 135 | tCommands = {
| |
| 136 | ["me"] = function(tUser, sContent) | |
| 137 | if #sContent > 0 then | |
| 138 | send("* " .. tUser.sUsername .. " " .. sContent)
| |
| 139 | else | |
| 140 | send("* Usage: /me [words]", tUser.nUserID)
| |
| 141 | end | |
| 142 | end, | |
| 143 | ["nick"] = function(tUser, sContent) | |
| 144 | if #sContent > 0 then | |
| 145 | local sOldName = tUser.sUsername | |
| 146 | tUser.sUsername = sContent | |
| 147 | send("* " .. sOldName .. " is now known as " .. tUser.sUsername)
| |
| 148 | else | |
| 149 | send("* Usage: /nick [nickname]", tUser.nUserID)
| |
| 150 | end | |
| 151 | end, | |
| 152 | ["users"] = function(tUser, sContent) | |
| 153 | send("* Connected Users:", tUser.nUserID)
| |
| 154 | local sUsers = "*" | |
| 155 | for _, tUser in pairs(tUsers) do | |
| 156 | sUsers = sUsers .. " " .. tUser.sUsername | |
| 157 | end | |
| 158 | send(sUsers, tUser.nUserID) | |
| 159 | end, | |
| 160 | ["help"] = function(tUser, sContent) | |
| 161 | send("* Available commands:", tUser.nUserID)
| |
| 162 | local sCommands = "*" | |
| 163 | for sCommand in pairs(tCommands) do | |
| 164 | sCommands = sCommands .. " /" .. sCommand | |
| 165 | end | |
| 166 | send(sCommands .. " /logout", tUser.nUserID) | |
| 167 | end, | |
| 168 | } | |
| 169 | ||
| 170 | local nSenderID, tMessage = rednet.receive("chat")
| |
| 171 | if type(tMessage) == "table" then | |
| 172 | if tMessage.sType == "login" then | |
| 173 | -- Login from new client | |
| 174 | local nUserID = tMessage.nUserID | |
| 175 | local sUsername = tMessage.sUsername | |
| 176 | if nUserID and sUsername then | |
| 177 | tUsers[nUserID] = {
| |
| 178 | nID = nSenderID, | |
| 179 | nUserID = nUserID, | |
| 180 | sUsername = sUsername, | |
| 181 | } | |
| 182 | nUsers = nUsers + 1 | |
| 183 | printUsers() | |
| 184 | send("* " .. sUsername .. " has joined the chat")
| |
| 185 | ping(nUserID) | |
| 186 | end | |
| 187 | ||
| 188 | else | |
| 189 | -- Something else from existing client | |
| 190 | local nUserID = tMessage.nUserID | |
| 191 | local tUser = tUsers[nUserID] | |
| 192 | if tUser and tUser.nID == nSenderID then | |
| 193 | if tMessage.sType == "logout" then | |
| 194 | send("* " .. tUser.sUsername .. " has left the chat")
| |
| 195 | tUsers[nUserID] = nil | |
| 196 | nUsers = nUsers - 1 | |
| 197 | printUsers() | |
| 198 | ||
| 199 | elseif tMessage.sType == "chat" then | |
| 200 | local sMessage = tMessage.sText | |
| 201 | if sMessage then | |
| 202 | local sCommand = string.match(sMessage, "^/([a-z]+)") | |
| 203 | if sCommand then | |
| 204 | local fnCommand = tCommands[sCommand] | |
| 205 | if fnCommand then | |
| 206 | local sContent = string.sub(sMessage, #sCommand + 3) | |
| 207 | fnCommand(tUser, sContent) | |
| 208 | else | |
| 209 | send("* Unrecognised command: /" .. sCommand, tUser.nUserID)
| |
| 210 | end | |
| 211 | else | |
| 212 | send("<" .. tUser.sUsername .. "> " .. tMessage.sText)
| |
| 213 | end | |
| 214 | end | |
| 215 | ||
| 216 | elseif tMessage.sType == "ping to server" then | |
| 217 | rednet.send(tUser.nID, {
| |
| 218 | sType = "pong to client", | |
| 219 | nUserID = nUserID, | |
| 220 | }, "chat") | |
| 221 | ||
| 222 | elseif tMessage.sType == "pong to server" then | |
| 223 | tUser.bPingPonged = true | |
| 224 | ||
| 225 | end | |
| 226 | end | |
| 227 | end | |
| 228 | end | |
| 229 | end | |
| 230 | end | |
| 231 | ) | |
| 232 | if not ok then | |
| 233 | printError(error) | |
| 234 | end | |
| 235 | ||
| 236 | -- Unhost server | |
| 237 | for nUserID, tUser in pairs(tUsers) do | |
| 238 | rednet.send(tUser.nID, {
| |
| 239 | sType = "kick", | |
| 240 | nUserID = nUserID, | |
| 241 | }, "chat") | |
| 242 | end | |
| 243 | rednet.unhost("chat")
| |
| 244 | closeModem() | |
| 245 | ||
| 246 | elseif sCommand == "join" then | |
| 247 | -- "chat join" | |
| 248 | -- Get hostname and username | |
| 249 | local sHostname = tArgs[2] | |
| 250 | local sUsername = tArgs[3] | |
| 251 | if sHostname == nil or sUsername == nil then | |
| 252 | printUsage() | |
| 253 | return | |
| 254 | end | |
| 255 | ||
| 256 | -- Connect | |
| 257 | if not openModem() then | |
| 258 | return | |
| 259 | end | |
| 260 | write("Looking up " .. sHostname .. "... ")
| |
| 261 | local nHostID = rednet.lookup("chat", sHostname)
| |
| 262 | if nHostID == nil then | |
| 263 | print("Failed.")
| |
| 264 | return | |
| 265 | else | |
| 266 | print("Success.")
| |
| 267 | end | |
| 268 | ||
| 269 | -- Login | |
| 270 | local nUserID = math.random(1, 2147483647) | |
| 271 | rednet.send(nHostID, {
| |
| 272 | sType = "login", | |
| 273 | nUserID = nUserID, | |
| 274 | sUsername = sUsername, | |
| 275 | }, "chat") | |
| 276 | ||
| 277 | -- Setup ping pong | |
| 278 | local bPingPonged = true | |
| 279 | local pingPongTimer = os.startTimer(0) | |
| 280 | ||
| 281 | local function ping() | |
| 282 | rednet.send(nHostID, {
| |
| 283 | sType = "ping to server", | |
| 284 | nUserID = nUserID, | |
| 285 | }, "chat") | |
| 286 | bPingPonged = false | |
| 287 | pingPongTimer = os.startTimer(15) | |
| 288 | end | |
| 289 | ||
| 290 | -- Handle messages | |
| 291 | local w, h = term.getSize() | |
| 292 | local parentTerm = term.current() | |
| 293 | local titleWindow = window.create(parentTerm, 1, 1, w, 1, true) | |
| 294 | local historyWindow = window.create(parentTerm, 1, 2, w, h - 2, true) | |
| 295 | local promptWindow = window.create(parentTerm, 1, h, w, 1, true) | |
| 296 | historyWindow.setCursorPos(1, h - 2) | |
| 297 | ||
| 298 | term.clear() | |
| 299 | term.setTextColour(textColour) | |
| 300 | term.redirect(promptWindow) | |
| 301 | promptWindow.restoreCursor() | |
| 302 | ||
| 303 | local function drawTitle() | |
| 304 | local w = titleWindow.getSize() | |
| 305 | local sTitle = sUsername .. " on " .. sHostname | |
| 306 | titleWindow.setTextColour(highlightColour) | |
| 307 | titleWindow.setCursorPos(math.floor(w / 2 - #sTitle / 2), 1) | |
| 308 | titleWindow.clearLine() | |
| 309 | titleWindow.write(sTitle) | |
| 310 | promptWindow.restoreCursor() | |
| 311 | end | |
| 312 | ||
| 313 | local function printMessage(sMessage) | |
| 314 | term.redirect(historyWindow) | |
| 315 | print() | |
| 316 | if string.match(sMessage, "^%*") then | |
| 317 | -- Information | |
| 318 | term.setTextColour(highlightColour) | |
| 319 | write(sMessage) | |
| 320 | term.setTextColour(textColour) | |
| 321 | else | |
| 322 | -- Chat | |
| 323 | local sUsernameBit = string.match(sMessage, "^<[^>]*>") | |
| 324 | if sUsernameBit then | |
| 325 | term.setTextColour(highlightColour) | |
| 326 | write(sUsernameBit) | |
| 327 | term.setTextColour(textColour) | |
| 328 | write(string.sub(sMessage, #sUsernameBit + 1)) | |
| 329 | else | |
| 330 | write(sMessage) | |
| 331 | end | |
| 332 | end | |
| 333 | term.redirect(promptWindow) | |
| 334 | promptWindow.restoreCursor() | |
| 335 | end | |
| 336 | ||
| 337 | drawTitle() | |
| 338 | ||
| 339 | local ok, error = pcall(parallel.waitForAny, | |
| 340 | function() | |
| 341 | while true do | |
| 342 | local sEvent, timer = os.pullEvent() | |
| 343 | if sEvent == "timer" then | |
| 344 | if timer == pingPongTimer then | |
| 345 | if not bPingPonged then | |
| 346 | printMessage("Server timeout.")
| |
| 347 | return | |
| 348 | else | |
| 349 | ping() | |
| 350 | end | |
| 351 | end | |
| 352 | ||
| 353 | elseif sEvent == "term_resize" then | |
| 354 | local w, h = parentTerm.getSize() | |
| 355 | titleWindow.reposition(1, 1, w, 1) | |
| 356 | historyWindow.reposition(1, 2, w, h - 2) | |
| 357 | promptWindow.reposition(1, h, w, 1) | |
| 358 | ||
| 359 | end | |
| 360 | end | |
| 361 | end, | |
| 362 | function() | |
| 363 | while true do | |
| 364 | local nSenderID, tMessage = rednet.receive("chat")
| |
| 365 | if nSenderID == nHostID and type(tMessage) == "table" and tMessage.nUserID == nUserID then | |
| 366 | if tMessage.sType == "text" then | |
| 367 | local sText = tMessage.sText | |
| 368 | if sText then | |
| 369 | printMessage(sText) | |
| 370 | end | |
| 371 | ||
| 372 | elseif tMessage.sType == "ping to client" then | |
| 373 | rednet.send(nSenderID, {
| |
| 374 | sType = "pong to server", | |
| 375 | nUserID = nUserID, | |
| 376 | }, "chat") | |
| 377 | ||
| 378 | elseif tMessage.sType == "pong to client" then | |
| 379 | bPingPonged = true | |
| 380 | ||
| 381 | elseif tMessage.sType == "kick" then | |
| 382 | return | |
| 383 | ||
| 384 | end | |
| 385 | end | |
| 386 | end | |
| 387 | end, | |
| 388 | function() | |
| 389 | local tSendHistory = {}
| |
| 390 | while true do | |
| 391 | promptWindow.setCursorPos(1, 1) | |
| 392 | promptWindow.clearLine() | |
| 393 | promptWindow.setTextColor(highlightColour) | |
| 394 | promptWindow.write(": ")
| |
| 395 | promptWindow.setTextColor(textColour) | |
| 396 | ||
| 397 | local sChat = read(nil, tSendHistory) | |
| 398 | if string.match(sChat, "^/logout") then | |
| 399 | break | |
| 400 | else | |
| 401 | rednet.send(nHostID, {
| |
| 402 | sType = "chat", | |
| 403 | nUserID = nUserID, | |
| 404 | sText = sChat, | |
| 405 | }, "chat") | |
| 406 | table.insert(tSendHistory, sChat) | |
| 407 | end | |
| 408 | end | |
| 409 | end | |
| 410 | ) | |
| 411 | ||
| 412 | -- Close the windows | |
| 413 | term.redirect(parentTerm) | |
| 414 | ||
| 415 | -- Print error notice | |
| 416 | local _, h = term.getSize() | |
| 417 | term.setCursorPos(1, h) | |
| 418 | term.clearLine() | |
| 419 | term.setCursorBlink(false) | |
| 420 | if not ok then | |
| 421 | printError(error) | |
| 422 | end | |
| 423 | ||
| 424 | -- Logout | |
| 425 | rednet.send(nHostID, {
| |
| 426 | sType = "logout", | |
| 427 | nUserID = nUserID, | |
| 428 | }, "chat") | |
| 429 | closeModem() | |
| 430 | ||
| 431 | -- Print disconnection notice | |
| 432 | print("Disconnected.")
| |
| 433 | ||
| 434 | else | |
| 435 | -- "chat somethingelse" | |
| 436 | printUsage() | |
| 437 | ||
| 438 | end | |
| 439 |
