init wip

notes.txt

@@ -0,0 +1,60 @@
+gold
+hp
+level
+strength
+armor
+xp
+
+rooms with period flooring, +/- doors, and hallways?
+- more like original
+kobolds as a basic dumb enemy
+i inventory listing, somewhere to display last x messages about events
+
+Amulet of Yendor: goal, lowest level
+"Rodney" spelled backwards, which they envisioned as renowned wizard
+weapons, armor, potions, scrolls, and other magical items
+q to quaff a potion, w to wield a weapon, e to eat some food
+scoreboard based on time survived + depth traveled + what found/have
+☺
+
+alt idea: text descriptions in natural language of Adventure/Colossal Cave and
+  the original Zork games
+
+grid of three rooms by three rooms (potentially); dead end hallways sometimes
+appear where rooms would be expected. Lower levels can also include a maze in
+the place of a room
+
+- https://en.wikipedia.org/wiki/Code_page_437
+- https://en.wikipedia.org/wiki/Hack_(video_game)
+- https://en.wikipedia.org/wiki/NetHack
+- https://en.wikipedia.org/wiki/Moria_(video_game)
+- https://en.wikipedia.org/wiki/Angband_(video_game)
+- https://en.wikipedia.org/wiki/Roguelike
+- https://en.wikipedia.org/wiki/Dungeon_crawl
+- https://www.reddit.com/r/roguelikes/
+- http://roguebasin.com/index.php?title=Main_Page
+- http://roguebasin.com/index.php?title=Roguelike_Dev_FAQ
+- http://roguebasin.com/index.php?title=How_to_Write_a_Roguelike_in_15_Steps
+- http://roguebasin.com/index.php?title=Articles
+
+spells that can take effect after a delay
+lasting enchantments or permanent effects
+one-use items vs continually useful
+generation of dungeon
+idea: games playable within each others...
+terrain, wilderness, dungeons, etc
+scheduling: how turns / speed work, whether actions can be interrupted or not
+food requirement? items, etc
+item types, effects, uses
+spell costs
+shopping, theft, crafting
+interactions besides fighting
+classes, skills, complexity and freedom
+simple controls, easy to start, hard to master
+books! guides! writing!
+quests, jobs, daily cycles
+
+unlocking abilities through picking up items hmmm
+deleting, re-generating vessels ? save/load ??
+
+You are trapped in an out-of-control computer, and it's making deadly monsters. The goal is to stay alive and find a way out.

src/json.lua

@@ -0,0 +1,400 @@
+--
+-- json.lua
+--
+-- Copyright (c) 2019 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(3, 6),  16 )
+  local n2 = tonumber( s:sub(9, 12), 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 has_unicode_escape = false
+  local has_surrogate_escape = false
+  local has_escape = false
+  local last
+  for j = i + 1, #str do
+    local x = str:byte(j)
+
+    if x < 32 then
+      decode_error(str, j, "control character in string")
+    end
+
+    if last == 92 then -- "\\" (escape char)
+      if x == 117 then -- "u" (unicode escape sequence)
+        local hex = str:sub(j + 1, j + 5)
+        if not hex:find("%x%x%x%x") then
+          decode_error(str, j, "invalid unicode escape in string")
+        end
+        if hex:find("^[dD][89aAbB]") then
+          has_surrogate_escape = true
+        else
+          has_unicode_escape = true
+        end
+      else
+        local c = string.char(x)
+        if not escape_chars[c] then
+          decode_error(str, j, "invalid escape char '" .. c .. "' in string")
+        end
+        has_escape = true
+      end
+      last = nil
+
+    elseif x == 34 then -- '"' (end of string)
+      local s = str:sub(i + 1, j - 1)
+      if has_surrogate_escape then
+        s = s:gsub("\\u[dD][89aAbB]..\\u....", parse_unicode_escape)
+      end
+      if has_unicode_escape then
+        s = s:gsub("\\u....", parse_unicode_escape)
+      end
+      if has_escape then
+        s = s:gsub("\\.", escape_char_map_inv)
+      end
+      return s, j + 1
+
+    else
+      last = x
+    end
+  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

src/lovebird.lua

@@ -0,0 +1,737 @@
+--
+-- lovebird
+--
+-- Copyright (c) 2017 rxi
+--
+-- This library is free software; you can redistribute it and/or modify it
+-- under the terms of the MIT license. See LICENSE for details.
+--
+
+local socket = require "socket"
+
+local lovebird = { _version = "0.4.3" }
+
+lovebird.loadstring = loadstring or load
+lovebird.inited = false
+lovebird.host = "*"
+lovebird.buffer = ""
+lovebird.lines = {}
+lovebird.connections = {}
+lovebird.pages = {}
+
+lovebird.wrapprint = true
+lovebird.timestamp = true
+lovebird.allowhtml = false
+lovebird.echoinput = true
+lovebird.port = 8000
+lovebird.whitelist = { "127.0.0.1" }
+lovebird.maxlines = 200
+lovebird.updateinterval = .5
+
+
+lovebird.pages["index"] = [[
+<?lua
+-- Handle console input
+if req.parsedbody.input then
+  local str = req.parsedbody.input
+  if lovebird.echoinput then
+    lovebird.pushline({ type = 'input', str = str })
+  end
+  if str:find("^=") then
+    str = "print(" .. str:sub(2) .. ")"
+  end
+  xpcall(function() assert(lovebird.loadstring(str, "input"))() end,
+         lovebird.onerror)
+end
+?>
+
+<!doctype html>
+<html>
+  <head>
+  <meta http-equiv="x-ua-compatible" content="IE=Edge"/>
+  <meta charset="utf-8">
+  <title>lovebird</title>
+  <style>
+    body {
+      margin: 0px;
+      font-size: 14px;
+      font-family: helvetica, verdana, sans;
+      background: #FFFFFF;
+    }
+    form {
+      margin-bottom: 0px;
+    }
+    .timestamp {
+      color: #909090;
+      padding-right: 4px;
+    }
+    .repeatcount {
+      color: #F0F0F0;
+      background: #505050;
+      font-size: 11px;
+      font-weight: bold;
+      text-align: center;
+      padding-left: 4px;
+      padding-right: 4px;
+      padding-top: 0px;
+      padding-bottom: 0px;
+      border-radius: 7px;
+      display: inline-block;
+    }
+    .errormarker {
+      color: #F0F0F0;
+      background: #8E0000;
+      font-size: 11px;
+      font-weight: bold;
+      text-align: center;
+      border-radius: 8px;
+      width: 17px;
+      padding-top: 0px;
+      padding-bottom: 0px;
+      display: inline-block;
+    }
+    .greybordered {
+      margin: 12px;
+      background: #F0F0F0;
+      border: 1px solid #E0E0E0;
+      border-radius: 3px;
+    }
+    .inputline {
+      font-family: mono, courier;
+      font-size: 13px;
+      color: #606060;
+    }
+    .inputline:before {
+      content: '\00B7\00B7\00B7';
+      padding-right: 5px;
+    }
+    .errorline {
+      color: #8E0000;
+    }
+    #header {
+      background: #101010;
+      height: 25px;
+      color: #F0F0F0;
+      padding: 9px
+    }
+    #title {
+      float: left;
+      font-size: 20px;
+    }
+    #title a {
+      color: #F0F0F0;
+      text-decoration: none;
+    }
+    #title a:hover {
+      color: #FFFFFF;
+    }
+    #version {
+      font-size: 10px;
+    }
+    #status {
+      float: right;
+      font-size: 14px;
+      padding-top: 4px;
+    }
+    #main a {
+      color: #000000;
+      text-decoration: none;
+      background: #E0E0E0;
+      border: 1px solid #D0D0D0;
+      border-radius: 3px;
+      padding-left: 2px;
+      padding-right: 2px;
+      display: inline-block;
+    }
+    #main a:hover {
+      background: #D0D0D0;
+      border: 1px solid #C0C0C0;
+    }
+    #console {
+      position: absolute;
+      top: 40px; bottom: 0px; left: 0px; right: 312px;
+    }
+    #input {
+      position: absolute;
+      margin: 10px;
+      bottom: 0px; left: 0px; right: 0px;
+    }
+    #inputbox {
+      width: 100%;
+      font-family: mono, courier;
+      font-size: 13px;
+    }
+    #output {
+      overflow-y: scroll;
+      position: absolute;
+      margin: 10px;
+      line-height: 17px;
+      top: 0px; bottom: 36px; left: 0px; right: 0px;
+    }
+    #env {
+      position: absolute;
+      top: 40px; bottom: 0px; right: 0px;
+      width: 300px;
+    }
+    #envheader {
+      padding: 5px;
+      background: #E0E0E0;
+    }
+    #envvars {
+      position: absolute;
+      left: 0px; right: 0px; top: 25px; bottom: 0px;
+      margin: 10px;
+      overflow-y: scroll;
+      font-size: 12px;
+    }
+  </style>
+  </head>
+  <body>
+    <div id="header">
+      <div id="title">
+        <a href="https://github.com/rxi/lovebird">lovebird</a>
+        <span id="version"><?lua echo(lovebird._version) ?></span>
+      </div>
+      <div id="status"></div>
+    </div>
+    <div id="main">
+      <div id="console" class="greybordered">
+        <div id="output"> <?lua echo(lovebird.buffer) ?> </div>
+        <div id="input">
+          <form method="post"
+                onkeydown="return onInputKeyDown(event);"
+                onsubmit="onInputSubmit(); return false;">
+            <input id="inputbox" name="input" type="text"
+                autocomplete="off"></input>
+          </form>
+        </div>
+      </div>
+      <div id="env" class="greybordered">
+        <div id="envheader"></div>
+        <div id="envvars"></div>
+      </div>
+    </div>
+    <script>
+      document.getElementById("inputbox").focus();
+
+      var changeFavicon = function(href) {
+        var old = document.getElementById("favicon");
+        if (old) document.head.removeChild(old);
+        var link = document.createElement("link");
+        link.id = "favicon";
+        link.rel = "shortcut icon";
+        link.href = href;
+        document.head.appendChild(link);
+      }
+
+      var truncate = function(str, len) {
+        if (str.length <= len) return str;
+        return str.substring(0, len - 3) + "...";
+      }
+
+      var geturl = function(url, onComplete, onFail) {
+        var req = new XMLHttpRequest();
+        req.onreadystatechange = function() {
+          if (req.readyState != 4) return;
+          if (req.status == 200) {
+            if (onComplete) onComplete(req.responseText);
+          } else {
+            if (onFail) onFail(req.responseText);
+          }
+        }
+        url += (url.indexOf("?") > -1 ? "&_=" : "?_=") + Math.random();
+        req.open("GET", url, true);
+        req.send();
+      }
+
+      var divContentCache = {}
+      var updateDivContent = function(id, content) {
+        if (divContentCache[id] != content) {
+          document.getElementById(id).innerHTML = content;
+          divContentCache[id] = content
+          return true;
+        }
+        return false;
+      }
+
+      var onInputSubmit = function() {
+        var b = document.getElementById("inputbox");
+        var req = new XMLHttpRequest();
+        req.open("POST", "/", true);
+        req.send("input=" + encodeURIComponent(b.value));
+        /* Do input history */
+        if (b.value && inputHistory[0] != b.value) {
+          inputHistory.unshift(b.value);
+        }
+        inputHistory.index = -1;
+        /* Reset */
+        b.value = "";
+        refreshOutput();
+      }
+
+      /* Input box history */
+      var inputHistory = [];
+      inputHistory.index = 0;
+      var onInputKeyDown = function(e) {
+        var key = e.which || e.keyCode;
+        if (key != 38 && key != 40) return true;
+        var b = document.getElementById("inputbox");
+        if (key == 38 && inputHistory.index < inputHistory.length - 1) {
+          /* Up key */
+          inputHistory.index++;
+        }
+        if (key == 40 && inputHistory.index >= 0) {
+          /* Down key */
+          inputHistory.index--;
+        }
+        b.value = inputHistory[inputHistory.index] || "";
+        b.selectionStart = b.value.length;
+        return false;
+      }
+
+      /* Output buffer and status */
+      var refreshOutput = function() {
+        geturl("/buffer", function(text) {
+          updateDivContent("status", "connected &#9679;");
+          if (updateDivContent("output", text)) {
+            var div = document.getElementById("output");
+            div.scrollTop = div.scrollHeight;
+          }
+          /* Update favicon */
+          changeFavicon("data:image/png;base64," +
+"iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAAP1BMVEUAAAAAAAAAAAD////19fUO"+
+"Dg7v7+/h4eGzs7MlJSUeHh7n5+fY2NjJycnGxsa3t7eioqKfn5+QkJCHh4d+fn7zU+b5AAAAAnRS"+
+"TlPlAFWaypEAAABRSURBVBjTfc9HDoAwDERRQ+w0ern/WQkZaUBC4e/mrWzppH9VJjbjZg1Ii2rM"+
+"DyR1JZ8J0dVWggIGggcEwgbYCRbuPRqgyjHNpzUP+39GPu9fgloC5L9DO0sAAAAASUVORK5CYII="
+          );
+        },
+        function(text) {
+          updateDivContent("status", "disconnected &#9675;");
+          /* Update favicon */
+          changeFavicon("data:image/png;base64," +
+"iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAAYFBMVEUAAAAAAAAAAADZ2dm4uLgM"+
+"DAz29vbz8/Pv7+/h4eHIyMiwsLBtbW0lJSUeHh4QEBDn5+fS0tLDw8O0tLSioqKfn5+QkJCHh4d+"+
+"fn5ycnJmZmZgYGBXV1dLS0tFRUUGBgZ0He44AAAAAnRSTlPlAFWaypEAAABeSURBVBjTfY9HDoAw"+
+"DAQD6Z3ey/9/iXMxkVDYw0g7F3tJReosUKHnwY4pCM+EtOEVXrb7wVRA0dMbaAcUwiVeDQq1Jp4a"+
+"xUg5kE0ooqZu68Di2Tgbs/DiY/9jyGf+AyFKBAK7KD2TAAAAAElFTkSuQmCC"
+          );
+        });
+      }
+      setInterval(refreshOutput,
+                  <?lua echo(lovebird.updateinterval) ?> * 1000);
+
+      /* Environment variable view */
+      var envPath = "";
+      var refreshEnv = function() {
+        geturl("/env.json?p=" + envPath, function(text) {
+          var json = eval("(" + text + ")");
+
+          /* Header */
+          var html = "<a href='#' onclick=\"setEnvPath('')\">env</a>";
+          var acc = "";
+          var p = json.path != "" ? json.path.split(".") : [];
+          for (var i = 0; i < p.length; i++) {
+            acc += "." + p[i];
+            html += " <a href='#' onclick=\"setEnvPath('" + acc + "')\">" +
+                    truncate(p[i], 10) + "</a>";
+          }
+          updateDivContent("envheader", html);
+
+          /* Handle invalid table path */
+          if (!json.valid) {
+            updateDivContent("envvars", "Bad path");
+            return;
+          }
+
+          /* Variables */
+          var html = "<table>";
+          for (var i = 0; json.vars[i]; i++) {
+            var x = json.vars[i];
+            var fullpath = (json.path + "." + x.key).replace(/^\./, "");
+            var k = truncate(x.key, 15);
+            if (x.type == "table") {
+              k = "<a href='#' onclick=\"setEnvPath('" + fullpath + "')\">" +
+                  k + "</a>";
+            }
+            var v = "<a href='#' onclick=\"insertVar('" +
+                    fullpath.replace(/\.(-?[0-9]+)/g, "[$1]") +
+                    "');\">" + x.value + "</a>"
+            html += "<tr><td>" + k + "</td><td>" + v + "</td></tr>";
+          }
+          html += "</table>";
+          updateDivContent("envvars", html);
+        });
+      }
+      var setEnvPath = function(p) {
+        envPath = p;
+        refreshEnv();
+      }
+      var insertVar = function(p) {
+        var b = document.getElementById("inputbox");
+        b.value += p;
+        b.focus();
+      }
+      setInterval(refreshEnv, <?lua echo(lovebird.updateinterval) ?> * 1000);
+    </script>
+  </body>
+</html>
+]]
+
+
+lovebird.pages["buffer"] = [[ <?lua echo(lovebird.buffer) ?> ]]
+
+
+lovebird.pages["env.json"] = [[
+<?lua
+  local t = _G
+  local p = req.parsedurl.query.p or ""
+  p = p:gsub("%.+", "."):match("^[%.]*(.*)[%.]*$")
+  if p ~= "" then
+    for x in p:gmatch("[^%.]+") do
+      t = t[x] or t[tonumber(x)]
+      -- Return early if path does not exist
+      if type(t) ~= "table" then
+        echo('{ "valid": false, "path": ' .. string.format("%q", p) .. ' }')
+        return
+      end
+    end
+  end
+?>
+{
+  "valid": true,
+  "path": "<?lua echo(p) ?>",
+  "vars": [
+    <?lua
+      local keys = {}
+      for k in pairs(t) do
+        if type(k) == "number" or type(k) == "string" then
+          table.insert(keys, k)
+        end
+      end
+      table.sort(keys, lovebird.compare)
+      for _, k in pairs(keys) do
+        local v = t[k]
+    ?>
+      {
+        "key": "<?lua echo(k) ?>",
+        "value": <?lua echo(
+                          string.format("%q",
+                            lovebird.truncate(
+                              lovebird.htmlescape(
+                                tostring(v)), 26))) ?>,
+        "type": "<?lua echo(type(v)) ?>",
+      },
+    <?lua end ?>
+  ]
+}
+]]
+
+
+
+function lovebird.init()
+  -- Init server
+  lovebird.server = assert(socket.bind(lovebird.host, lovebird.port))
+  lovebird.addr, lovebird.port = lovebird.server:getsockname()
+  lovebird.server:settimeout(0)
+  -- Wrap print
+  lovebird.origprint = print
+  if lovebird.wrapprint then
+    local oldprint = print
+    print = function(...)
+      oldprint(...)
+      lovebird.print(...)
+    end
+  end
+  -- Compile page templates
+  for k, page in pairs(lovebird.pages) do
+    lovebird.pages[k] = lovebird.template(page, "lovebird, req",
+                                          "pages." .. k)
+  end
+  lovebird.inited = true
+end
+
+
+function lovebird.template(str, params, chunkname)
+  params = params and ("," .. params) or ""
+  local f = function(x) return string.format(" echo(%q)", x) end
+  str = ("?>"..str.."<?lua"):gsub("%?>(.-)<%?lua", f)
+  str = "local echo " .. params .. " = ..." .. str
+  local fn = assert(lovebird.loadstring(str, chunkname))
+  return function(...)
+    local output = {}
+    local echo = function(str) table.insert(output, str) end
+    fn(echo, ...)
+    return table.concat(lovebird.map(output, tostring))
+  end
+end
+
+
+function lovebird.map(t, fn)
+  local res = {}
+  for k, v in pairs(t) do res[k] = fn(v) end
+  return res
+end
+
+
+function lovebird.trace(...)
+  local str = "[lovebird] " .. table.concat(lovebird.map({...}, tostring), " ")
+  print(str)
+  if not lovebird.wrapprint then lovebird.print(str) end
+end
+
+
+function lovebird.unescape(str)
+  local f = function(x) return string.char(tonumber("0x"..x)) end
+  return (str:gsub("%+", " "):gsub("%%(..)", f))
+end
+
+
+function lovebird.parseurl(url)
+  local res = {}
+  res.path, res.search = url:match("/([^%?]*)%??(.*)")
+  res.query = {}
+  for k, v in res.search:gmatch("([^&^?]-)=([^&^#]*)") do
+    res.query[k] = lovebird.unescape(v)
+  end
+  return res
+end
+
+
+local htmlescapemap = {
+  ["<"] = "&lt;",
+  ["&"] = "&amp;",
+  ['"'] = "&quot;",
+  ["'"] = "&#039;",
+}
+
+function lovebird.htmlescape(str)
+  return ( str:gsub("[<&\"']", htmlescapemap) )
+end
+
+
+function lovebird.truncate(str, len)
+  if #str <= len then
+    return str
+  end
+  return str:sub(1, len - 3) .. "..."
+end
+
+
+function lovebird.compare(a, b)
+  local na, nb = tonumber(a), tonumber(b)
+  if na then
+    if nb then return na < nb end
+    return false
+  elseif nb then
+    return true
+  end
+  return tostring(a) < tostring(b)
+end
+
+
+function lovebird.checkwhitelist(addr)
+  if lovebird.whitelist == nil then return true end
+  for _, a in pairs(lovebird.whitelist) do
+    local ptn = "^" .. a:gsub("%.", "%%."):gsub("%*", "%%d*") .. "$"
+    if addr:match(ptn) then return true end
+  end
+  return false
+end
+
+
+function lovebird.clear()
+  lovebird.lines = {}
+  lovebird.buffer = ""
+end
+
+
+function lovebird.pushline(line)
+  line.time = os.time()
+  line.count = 1
+  table.insert(lovebird.lines, line)
+  if #lovebird.lines > lovebird.maxlines then
+    table.remove(lovebird.lines, 1)
+  end
+  lovebird.recalcbuffer()
+end
+
+
+function lovebird.recalcbuffer()
+  local function doline(line)
+    local str = line.str
+    if not lovebird.allowhtml then
+      str = lovebird.htmlescape(line.str):gsub("\n", "<br>")
+    end
+    if line.type == "input" then
+      str = '<span class="inputline">' .. str .. '</span>'
+    else
+      if line.type == "error" then
+        str = '<span class="errormarker">!</span> ' .. str
+        str = '<span class="errorline">' .. str .. '</span>'
+      end
+      if line.count > 1 then
+        str = '<span class="repeatcount">' .. line.count .. '</span> ' .. str
+      end
+      if lovebird.timestamp then
+        str = os.date('<span class="timestamp">%H:%M:%S</span> ', line.time) ..
+              str
+      end
+    end
+    return str
+  end
+  lovebird.buffer = table.concat(lovebird.map(lovebird.lines, doline), "<br>")
+end
+
+
+function lovebird.print(...)
+  local t = {}
+  for i = 1, select("#", ...) do
+    table.insert(t, tostring(select(i, ...)))
+  end
+  local str = table.concat(t, " ")
+  local last = lovebird.lines[#lovebird.lines]
+  if last and str == last.str then
+    -- Update last line if this line is a duplicate of it
+    last.time = os.time()
+    last.count = last.count + 1
+    lovebird.recalcbuffer()
+  else
+    -- Create new line
+    lovebird.pushline({ type = "output", str = str })
+  end
+end
+
+
+function lovebird.onerror(err)
+  lovebird.pushline({ type = "error", str = err })
+  if lovebird.wrapprint then
+    lovebird.origprint("[lovebird] ERROR: " .. err)
+  end
+end
+
+
+function lovebird.onrequest(req, client)
+  local page = req.parsedurl.path
+  page = page ~= "" and page or "index"
+  -- Handle "page not found"
+  if not lovebird.pages[page] then
+    return "HTTP/1.1 404\r\nContent-Length: 8\r\n\r\nBad page"
+  end
+  -- Handle page
+  local str
+  xpcall(function()
+    local data = lovebird.pages[page](lovebird, req)
+    local contenttype = "text/html"
+    if string.match(page, "%.json$") then
+      contenttype = "application/json"
+    end
+    str = "HTTP/1.1 200 OK\r\n" ..
+          "Content-Type: " .. contenttype .. "\r\n" ..
+          "Content-Length: " .. #data .. "\r\n" ..
+          "\r\n" .. data
+  end, lovebird.onerror)
+  return str
+end
+
+
+function lovebird.receive(client, pattern)
+  while 1 do
+    local data, msg = client:receive(pattern)
+    if not data then
+      if msg == "timeout" then
+        -- Wait for more data
+        coroutine.yield(true)
+      else
+        -- Disconnected -- yielding nil means we're done
+        coroutine.yield(nil)
+      end
+    else
+      return data
+    end
+  end
+end
+
+
+function lovebird.send(client, data)
+  local idx = 1
+  while idx < #data do
+    local res, msg = client:send(data, idx)
+    if not res and msg == "closed" then
+      -- Handle disconnect
+      coroutine.yield(nil)
+    else
+      idx = idx + res
+      coroutine.yield(true)
+    end
+  end
+end
+
+
+function lovebird.onconnect(client)
+  -- Create request table
+  local requestptn = "(%S*)%s*(%S*)%s*(%S*)"
+  local req = {}
+  req.socket = client
+  req.addr, req.port = client:getsockname()
+  req.request = lovebird.receive(client, "*l")
+  req.method, req.url, req.proto = req.request:match(requestptn)
+  req.headers = {}
+  while 1 do
+    local line, msg = lovebird.receive(client, "*l")
+    if not line or #line == 0 then break end
+    local k, v = line:match("(.-):%s*(.*)$")
+    req.headers[k] = v
+  end
+  if req.headers["Content-Length"] then
+    req.body = lovebird.receive(client, req.headers["Content-Length"])
+  end
+  -- Parse body
+  req.parsedbody = {}
+  if req.body then
+    for k, v in req.body:gmatch("([^&]-)=([^&^#]*)") do
+      req.parsedbody[k] = lovebird.unescape(v)
+    end
+  end
+  -- Parse request line's url
+  req.parsedurl = lovebird.parseurl(req.url)
+  -- Handle request; get data to send and send
+  local data = lovebird.onrequest(req)
+  lovebird.send(client, data)
+  -- Clear up
+  client:close()
+end
+
+
+function lovebird.update()
+  if not lovebird.inited then lovebird.init() end
+  -- Handle new connections
+  while 1 do
+    -- Accept new connections
+    local client = lovebird.server:accept()
+    if not client then break end
+    client:settimeout(0)
+    local addr = client:getsockname()
+    if lovebird.checkwhitelist(addr) then
+      -- Connection okay -- create and add coroutine to set
+      local conn = coroutine.wrap(function()
+        xpcall(function() lovebird.onconnect(client) end, function() end)
+      end)
+      lovebird.connections[conn] = true
+    else
+      -- Reject connection not on whitelist
+      lovebird.trace("got non-whitelisted connection attempt: ", addr)
+      client:close()
+    end
+  end
+  -- Handle existing connections
+  for conn in pairs(lovebird.connections) do
+    -- Resume coroutine, remove if it has finished
+    local status = conn()
+    if status == nil then
+      lovebird.connections[conn] = nil
+    end
+  end
+end
+
+
+return lovebird

src/main.moon

@@ -0,0 +1,21 @@
+export lovebird = require "lovebird"
+export json = require "json"
+
+-- export floors = {
+--   [0]: {}
+-- }
+-- export floor = floors[0]
+
+love.update = ->
+  lovebird.update!
+
+love.directorydropped = (path) ->
+  -- open with standard tools
+
+love.filedropped = (file) ->
+  -- if love.filesystem.mount file, "zip"
+  --   print love.filesystem.read "zip/test.txt"
+
+love.keypressed = (key) ->
+  if key == "escape"
+    love.event.quit! -- TEMP (send to game engine, which can have this function defined or others)