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- local class = (function()
- local class = function(classDef, parentClass)
- -- So we dont forget that these two methods will get overwritten
- if classDef.super or classDef.new then
- error("super and new can not exist within class defenitions", 2)
- end
- -- We need access to the parent classes methods methods
- if parentClass then
- setmetatable(classDef, {
- __index = parentClass
- })
- -- Allow access to uneffected parent class methods
- classDef.super = parentClass
- end
- -- Need to create Individual Class instances
- function classDef:new(...)
- local new = {}
- setmetatable(new, {
- __index = self
- })
- -- When a class has a constructor it must be called when creating an instance
- if new.constructor then
- new:constructor(...)
- end
- return new
- end
- -- Expose the modified class definition which includes :new and .super
- return classDef
- end
- return class
- end)()
- local json = (function()
- --
- -- json.lua
- --
- -- Copyright (c) 2020 rxi
- --
- -- Permission is hereby granted, free of charge, to any person obtaining a copy of
- -- this software and associated documentation files (the "Software"), to deal in
- -- the Software without restriction, including without limitation the rights to
- -- use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- -- of the Software, and to permit persons to whom the Software is furnished to do
- -- so, subject to the following conditions:
- --
- -- The above copyright notice and this permission notice shall be included in all
- -- copies or substantial portions of the Software.
- --
- -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- -- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- -- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- -- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- -- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- -- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- -- SOFTWARE.
- --
- local json = {
- _version = "0.1.2"
- }
- -------------------------------------------------------------------------------
- -- Encode
- -------------------------------------------------------------------------------
- local encode
- local escape_char_map = {
- ["\\"] = "\\",
- ["\""] = "\"",
- ["\b"] = "b",
- ["\f"] = "f",
- ["\n"] = "n",
- ["\r"] = "r",
- ["\t"] = "t"
- }
- local escape_char_map_inv = {
- ["/"] = "/"
- }
- for k, v in pairs(escape_char_map) do
- escape_char_map_inv[v] = k
- end
- local function escape_char(c)
- return "\\" .. (escape_char_map[c] or string.format("u%04x", c:byte()))
- end
- local function encode_nil(val)
- return "null"
- end
- local function encode_table(val, stack)
- local res = {}
- stack = stack or {}
- -- Circular reference?
- if stack[val] then
- error("circular reference")
- end
- stack[val] = true
- if rawget(val, 1) ~= nil or next(val) == nil then
- -- Treat as array -- check keys are valid and it is not sparse
- local n = 0
- for k in pairs(val) do
- if type(k) ~= "number" then
- error("invalid table: mixed or invalid key types")
- end
- n = n + 1
- end
- if n ~= #val then
- error("invalid table: sparse array")
- end
- -- Encode
- for i, v in ipairs(val) do
- table.insert(res, encode(v, stack))
- end
- stack[val] = nil
- return "[" .. table.concat(res, ",") .. "]"
- else
- -- Treat as an object
- for k, v in pairs(val) do
- if type(k) ~= "string" then
- error("invalid table: mixed or invalid key types")
- end
- table.insert(res, encode(k, stack) .. ":" .. encode(v, stack))
- end
- stack[val] = nil
- return "{" .. table.concat(res, ",") .. "}"
- end
- end
- local function encode_string(val)
- return '"' .. val:gsub('[%z\1-\31\\"]', escape_char) .. '"'
- end
- local function encode_number(val)
- -- Check for NaN, -inf and inf
- if val ~= val or val <= -math.huge or val >= math.huge then
- error("unexpected number value '" .. tostring(val) .. "'")
- end
- return string.format("%.14g", val)
- end
- local type_func_map = {
- ["nil"] = encode_nil,
- ["table"] = encode_table,
- ["string"] = encode_string,
- ["number"] = encode_number,
- ["boolean"] = tostring
- }
- encode = function(val, stack)
- local t = type(val)
- local f = type_func_map[t]
- if f then
- return f(val, stack)
- end
- error("unexpected type '" .. t .. "'")
- end
- function json.encode(val)
- return (encode(val))
- end
- -------------------------------------------------------------------------------
- -- Decode
- -------------------------------------------------------------------------------
- local parse
- local function create_set(...)
- local res = {}
- for i = 1, select("#", ...) do
- res[select(i, ...)] = true
- end
- return res
- end
- local space_chars = create_set(" ", "\t", "\r", "\n")
- local delim_chars = create_set(" ", "\t", "\r", "\n", "]", "}", ",")
- local escape_chars = create_set("\\", "/", '"', "b", "f", "n", "r", "t", "u")
- local literals = create_set("true", "false", "null")
- local literal_map = {
- ["true"] = true,
- ["false"] = false,
- ["null"] = nil
- }
- local function next_char(str, idx, set, negate)
- for i = idx, #str do
- if set[str:sub(i, i)] ~= negate then
- return i
- end
- end
- return #str + 1
- end
- local function decode_error(str, idx, msg)
- local line_count = 1
- local col_count = 1
- for i = 1, idx - 1 do
- col_count = col_count + 1
- if str:sub(i, i) == "\n" then
- line_count = line_count + 1
- col_count = 1
- end
- end
- error(string.format("%s at line %d col %d", msg, line_count, col_count))
- end
- local function codepoint_to_utf8(n)
- -- http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=iws-appendixa
- local f = math.floor
- if n <= 0x7f then
- return string.char(n)
- elseif n <= 0x7ff then
- return string.char(f(n / 64) + 192, n % 64 + 128)
- elseif n <= 0xffff then
- return string.char(f(n / 4096) + 224, f(n % 4096 / 64) + 128, n % 64 + 128)
- elseif n <= 0x10ffff then
- return string.char(f(n / 262144) + 240, f(n % 262144 / 4096) + 128, f(n % 4096 / 64) + 128, n % 64 + 128)
- end
- error(string.format("invalid unicode codepoint '%x'", n))
- end
- local function parse_unicode_escape(s)
- local n1 = tonumber(s:sub(1, 4), 16)
- local n2 = tonumber(s:sub(7, 10), 16)
- -- Surrogate pair?
- if n2 then
- return codepoint_to_utf8((n1 - 0xd800) * 0x400 + (n2 - 0xdc00) + 0x10000)
- else
- return codepoint_to_utf8(n1)
- end
- end
- local function parse_string(str, i)
- local res = ""
- local j = i + 1
- local k = j
- while j <= #str do
- local x = str:byte(j)
- if x < 32 then
- decode_error(str, j, "control character in string")
- elseif x == 92 then -- `\`: Escape
- res = res .. str:sub(k, j - 1)
- j = j + 1
- local c = str:sub(j, j)
- if c == "u" then
- local hex = str:match("^[dD][89aAbB]%x%x\\u%x%x%x%x", j + 1) or str:match("^%x%x%x%x", j + 1) or
- decode_error(str, j - 1, "invalid unicode escape in string")
- res = res .. parse_unicode_escape(hex)
- j = j + #hex
- else
- if not escape_chars[c] then
- decode_error(str, j - 1, "invalid escape char '" .. c .. "' in string")
- end
- res = res .. escape_char_map_inv[c]
- end
- k = j + 1
- elseif x == 34 then -- `"`: End of string
- res = res .. str:sub(k, j - 1)
- return res, j + 1
- end
- j = j + 1
- end
- decode_error(str, i, "expected closing quote for string")
- end
- local function parse_number(str, i)
- local x = next_char(str, i, delim_chars)
- local s = str:sub(i, x - 1)
- local n = tonumber(s)
- if not n then
- decode_error(str, i, "invalid number '" .. s .. "'")
- end
- return n, x
- end
- local function parse_literal(str, i)
- local x = next_char(str, i, delim_chars)
- local word = str:sub(i, x - 1)
- if not literals[word] then
- decode_error(str, i, "invalid literal '" .. word .. "'")
- end
- return literal_map[word], x
- end
- local function parse_array(str, i)
- local res = {}
- local n = 1
- i = i + 1
- while 1 do
- local x
- i = next_char(str, i, space_chars, true)
- -- Empty / end of array?
- if str:sub(i, i) == "]" then
- i = i + 1
- break
- end
- -- Read token
- x, i = parse(str, i)
- res[n] = x
- n = n + 1
- -- Next token
- i = next_char(str, i, space_chars, true)
- local chr = str:sub(i, i)
- i = i + 1
- if chr == "]" then
- break
- end
- if chr ~= "," then
- decode_error(str, i, "expected ']' or ','")
- end
- end
- return res, i
- end
- local function parse_object(str, i)
- local res = {}
- i = i + 1
- while 1 do
- local key, val
- i = next_char(str, i, space_chars, true)
- -- Empty / end of object?
- if str:sub(i, i) == "}" then
- i = i + 1
- break
- end
- -- Read key
- if str:sub(i, i) ~= '"' then
- decode_error(str, i, "expected string for key")
- end
- key, i = parse(str, i)
- -- Read ':' delimiter
- i = next_char(str, i, space_chars, true)
- if str:sub(i, i) ~= ":" then
- decode_error(str, i, "expected ':' after key")
- end
- i = next_char(str, i + 1, space_chars, true)
- -- Read value
- val, i = parse(str, i)
- -- Set
- res[key] = val
- -- Next token
- i = next_char(str, i, space_chars, true)
- local chr = str:sub(i, i)
- i = i + 1
- if chr == "}" then
- break
- end
- if chr ~= "," then
- decode_error(str, i, "expected '}' or ','")
- end
- end
- return res, i
- end
- local char_func_map = {
- ['"'] = parse_string,
- ["0"] = parse_number,
- ["1"] = parse_number,
- ["2"] = parse_number,
- ["3"] = parse_number,
- ["4"] = parse_number,
- ["5"] = parse_number,
- ["6"] = parse_number,
- ["7"] = parse_number,
- ["8"] = parse_number,
- ["9"] = parse_number,
- ["-"] = parse_number,
- ["t"] = parse_literal,
- ["f"] = parse_literal,
- ["n"] = parse_literal,
- ["["] = parse_array,
- ["{"] = parse_object
- }
- parse = function(str, idx)
- local chr = str:sub(idx, idx)
- local f = char_func_map[chr]
- if f then
- return f(str, idx)
- end
- decode_error(str, idx, "unexpected character '" .. chr .. "'")
- end
- function json.decode(str)
- if type(str) ~= "string" then
- error("expected argument of type string, got " .. type(str))
- end
- local res, idx = parse(str, next_char(str, 1, space_chars, true))
- idx = next_char(str, idx, space_chars, true)
- if idx <= #str then
- decode_error(str, idx, "trailing garbage")
- end
- return res
- end
- return json
- end)()
- local PEER_LOBBY = "http://beastcraft.codingbutter.com:8888/"
- local WS_SERVER = "ws://beastcraft.codingbutter.com:3028"
- local P2P = class({
- dispatch = {
- connected = function()
- end
- },
- constructor = function(self, computerusername)
- self.username = computerusername or os.getComputerID()
- self.peers = {}
- self.ws, self.err = http.websocket(WS_SERVER)
- if self.ws then
- self.connected = true
- end
- end,
- attachEventLoop = function(self, eventLoop)
- parallel.waitForAll(function()
- while self.connected do
- local msg = self.ws.receive()
- self:parseMessage(msg)
- end
- end, function()
- local timeId = os.startTimer(60)
- while self.connected == true do
- local timer = os.pullEvent("timer")
- if timer[2] == timeId and self.id and self.lobby and self.room then
- self:joinRoom(self.lobby, self.room, self.password)
- timeId = os.startTimer(60)
- end
- end
- end, eventLoop)
- end,
- captureRecieved = function(self)
- end,
- parseMessage = function(self, msg)
- local event = json.decode(msg)
- local eventMsg = event.event
- local payload = event.payload
- if eventMsg == "peerId" then
- self.id = payload
- self:joinRoom()
- self:send("peer_added", {
- message = "Hello"
- }, self.peers)
- self.dispatch["connected"]()
- else
- if eventMsg == "peer_added" then
- self:joinRoom()
- end
- local peer = event.peer
- if self.dispatch[eventMsg] then
- self.dispatch[eventMsg](payload, peer)
- end
- end
- end,
- send = function(self, event, payload, peerIds)
- local peers = peerIds or self.peers
- if type(peers) ~= "table" then
- peers = {peerIds}
- end
- self.ws.send(json.encode({
- event = event,
- peer = {
- peerid = self.id,
- username = self.username
- },
- payload = payload,
- peers = peers
- }))
- end,
- on = function(self, eventusername, func)
- self.dispatch[eventusername] = func
- end,
- getPeers = function(self)
- return self.peers
- end,
- getRooms = function(lobby)
- local request = http.get(PEER_LOBBY .. lobby)
- return json.decode(request.readAll())
- end,
- joinRoom = function(self)
- local requestUrl = PEER_LOBBY .. self.lobby .. "/" .. self.room .. "/" .. self.id .. "/" .. self.username
- if password then
- requestUrl = requestUrl .. "?password=" .. password
- end
- local response = json.decode(http.get(requestUrl).readAll())
- self.peers = response.error and {} or response
- end,
- connect = function(self, lobby, room, password)
- self.lobby = lobby
- self.room = room
- self.password = password
- self:send("connect", {
- username = self.username
- })
- end,
- close = function(self)
- self.connected = false
- self.ws.close()
- end
- })
- return P2P
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