mirror of
https://codeberg.org/metamuffin/abrechenbarkeit.git
synced 2024-12-29 16:14:36 +00:00
631 lines
23 KiB
Lua
Executable file
631 lines
23 KiB
Lua
Executable file
#!/usr/bin/env luajit
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--[[
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Abrechenbarkeit - A simple trust-based ledger
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Copyright 2024 metamuffin
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Copyright 2024 dasriley
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, version 3 of the License only.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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]] --
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local function escape(s)
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return s:gsub("<", "<"):gsub("<", "<")
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end
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local function urldecode(s)
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if s == nil then return nil end
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return s:gsub("+", " "):gsub("%%20", " ")
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end
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local function urlencode(s)
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if s == nil then return nil end
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return s:gsub(" ", "%%20")
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end
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local function parse_query(q)
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if q == nil then return {} end
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local data = {}
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for pair in string.gmatch(q, "([^&]+)") do
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local flag = string.match(pair, "^([^=]+)$")
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if flag ~= nil then
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data[flag] = "1"
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else
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local key, value = string.match(pair, "^([^=]+)=([^=]*)$")
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if key ~= nil and value ~= nil then
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data[key] = urldecode(value)
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end
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end
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end
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return data
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end
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local function load_config()
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local log = io.open("config", "r")
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if log == nil then return {} end
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local config = {}
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for l in log:lines("l") do
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if l ~= "" and l[0] ~= "#" then
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local key, value = string.match(l, "^([^=]+)=([^=]*)")
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if key ~= nil and value ~= nil then
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config[key] = value
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end
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end
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end
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return config
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end
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local function load_translations(langs)
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local t = {}
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for _, lcode in ipairs(langs) do
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local file = io.open(string.format("locale/%s.ini", lcode), "r")
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if file ~= nil then
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for l in file:lines("l") do
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if l ~= "" then
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local key, value = string.match(l, "^([^=]+)=([^=]*)")
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if key ~= nil and value ~= nil then
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t[key] = value
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end
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end
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end
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end
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end
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return t
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end
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local config = load_config()
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local path = os.getenv("PATH_INFO")
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local method = os.getenv("REQUEST_METHOD")
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local query = parse_query(os.getenv("QUERY_STRING"))
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local translations = load_translations({ "en", config.language })
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local stylesheet = io.open("style.css"):read("a")
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local script = io.open("script.js"):read("a")
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local function format(template, params)
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return string.gsub(template, "{([%w\\.!]+)}", function(n)
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local raw = n:sub(1,1) ~= "!"
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if raw then n = n:sub(2) end
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local s = format(params[n] or translations[n] or "NIL TEMPLATE", params)
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return raw and s or escape(s)
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end)
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end
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local function format_amount(amount, tag, classes)
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local s = string.format("%.02f%s", amount / 100, config.unit or "€")
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if tag == nil then return s end
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return string.format([[<%s class="amount-%s %s">%s</%s>"]], tag, amount >= 0 and "pos" or "neg", s, tag, classes or "")
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end
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local function get_user_theme(username)
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local c = ""
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if username == "_jeb" then
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c = "html { animation: 2s jeb infinite; }"
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c = c .. "@keyframes jeb {\n"
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for i = 0, 100 do
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c = c .. string.format("%.02f%% { --hue: %.02f; } \n", i, i / 100 * 360)
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end
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c = c .. "\n}"
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elseif username == "Dinnerbone" then
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c = "html { transform: scale(-1); } "
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end
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return c
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end
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local function format_duration(t)
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if t > 86400 then return string.format("%d day%s", t / 86400, math.floor(t / 86400) ~= 1 and "s" or "") end
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if t > 3600 then return string.format("%d hour%s", t / 3600, math.floor(t / 3600) ~= 1 and "s" or "") end
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if t > 60 then return string.format("%d minute%s", t / 60, math.floor(t / 60) ~= 1 and "s" or "") end
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return string.format("%d seconds", t)
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end
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local function respond(status, title, body)
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print(string.format("Status: %d", status))
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print("Content-Type: text/html")
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print("")
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print(format([[
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<!DOCTYPE html>
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<html><head>
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<title>{title}</title>
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<meta charset="utf-8" />
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<style>{style}</style>
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<style>{user_style}</style>
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<script>{script}</script>
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{head_extra}
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</head>
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<body>
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<nav>
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<a class="logo" href="/">
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<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-receipt-cutoff" viewBox="0 0 16 16">
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<path d="M3 4.5a.5.5 0 0 1 .5-.5h6a.5.5 0 1 1 0 1h-6a.5.5 0 0 1-.5-.5m0 2a.5.5 0 0 1 .5-.5h6a.5.5 0 1 1 0 1h-6a.5.5 0 0 1-.5-.5m0 2a.5.5 0 0 1 .5-.5h6a.5.5 0 1 1 0 1h-6a.5.5 0 0 1-.5-.5m0 2a.5.5 0 0 1 .5-.5h6a.5.5 0 0 1 0 1h-6a.5.5 0 0 1-.5-.5m0 2a.5.5 0 0 1 .5-.5h6a.5.5 0 0 1 0 1h-6a.5.5 0 0 1-.5-.5M11.5 4a.5.5 0 0 0 0 1h1a.5.5 0 0 0 0-1zm0 2a.5.5 0 0 0 0 1h1a.5.5 0 0 0 0-1zm0 2a.5.5 0 0 0 0 1h1a.5.5 0 0 0 0-1zm0 2a.5.5 0 0 0 0 1h1a.5.5 0 0 0 0-1zm0 2a.5.5 0 0 0 0 1h1a.5.5 0 0 0 0-1z"/>
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<path d="M2.354.646a.5.5 0 0 0-.801.13l-.5 1A.5.5 0 0 0 1 2v13H.5a.5.5 0 0 0 0 1h15a.5.5 0 0 0 0-1H15V2a.5.5 0 0 0-.053-.224l-.5-1a.5.5 0 0 0-.8-.13L13 1.293l-.646-.647a.5.5 0 0 0-.708 0L11 1.293l-.646-.647a.5.5 0 0 0-.708 0L9 1.293 8.354.646a.5.5 0 0 0-.708 0L7 1.293 6.354.646a.5.5 0 0 0-.708 0L5 1.293 4.354.646a.5.5 0 0 0-.708 0L3 1.293zm-.217 1.198.51.51a.5.5 0 0 0 .707 0L4 1.707l.646.647a.5.5 0 0 0 .708 0L6 1.707l.646.647a.5.5 0 0 0 .708 0L8 1.707l.646.647a.5.5 0 0 0 .708 0L10 1.707l.646.647a.5.5 0 0 0 .708 0L12 1.707l.646.647a.5.5 0 0 0 .708 0l.509-.51.137.274V15H2V2.118z"/>
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</svg>
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{appname}
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</a>
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<a href="/?log">{log}</a>
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<a href="/?products">{products}</a>
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<a href="/?about">{about}</a>
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</nav>
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]], {
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title = escape(title),
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style = stylesheet,
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user_style = get_user_theme(path and path:sub(2)),
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script = script,
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head_extra = config.head_extra or ""
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}))
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body()
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print("</body></html>")
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end
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local function error_box(message)
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return string.format([[<div class="notif error"><p>Error: %s</p></div>]], message)
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end
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local function respond_error(message)
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respond(400, "Error", function()
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print(error_box(message))
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end)
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end
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local function redirect(path)
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print("Status: 307")
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print(string.format("Location: %s", path))
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print()
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end
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local function form_data()
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return parse_query(io.read())
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end
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local function read_log()
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local log = io.open("log", "r")
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if log == nil then
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return function() return nil end
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end
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local lines = log:lines("l")
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return function()
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local l = lines()
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if l == "" or l == nil then
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return nil
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end
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local time, username, amount, pcode, pcount, comment = string.match(l,
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"(%d+),([%w_ -]+),(-?%d+),([%w_-]*),(-?%d*),([%w_ -]*)")
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return tonumber(time), username, tonumber(amount), pcode, tonumber(pcount), comment
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end
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end
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local function read_products()
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local log = io.open("products", "r")
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if log == nil then
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return function() return nil end
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end
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local lines = log:lines("l")
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return function()
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local l = lines()
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if l == "" or l == nil then
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return nil
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end
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local barcode, price, name, owner = string.match(l, "([%w_-]+),(-?%d+),([%w_ -]*),([%w_ -]*)")
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return barcode, tonumber(price), name, owner
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end
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end
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local function balances()
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local users = {}
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for _, username, amount, _, _, _ in read_log() do
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users[username] = (users[username] or 0) + amount
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end
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return users
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end
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local function product_balances()
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local products = {}
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for _, _, _, pcode, pcount, _ in read_log() do
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if pcode ~= nil and pcount ~= nil then
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products[pcode] = (products[pcode] or 0) + pcount
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end
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end
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return products
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end
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local function last_txns()
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local users = {}
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for time, username, _, _, _, _ in read_log() do
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users[username] = time
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end
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return users
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end
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local function get_active_users()
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local user_balances = {}
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for time, username, amount, _, _, _ in read_log() do
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user_balances[username] = {
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time = time,
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username = username,
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balance = (user_balances[username] or { balance = 0 }).balance + amount
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}
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end
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local users = {}
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for _, user in pairs(user_balances) do
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table.insert(users, user)
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end
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table.sort(users, function(a, b) return a.time > b.time end)
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return users
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end
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local function r_user_post(username)
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local data = form_data()
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local amount = tonumber(data.amount)
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local comment = data.comment
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local pcode = nil
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local pcount = nil
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local powner = nil
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local powner_comment = nil
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if data.pcode then
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for p_barcode, p_amount, p_name, p_owner in read_products() do
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if p_barcode == data.pcode then
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powner = p_owner
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pcount = (tonumber(data.pcount) or 1) * (data.negate_pcount ~= nil and -1 or 1)
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pcode = p_barcode
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if amount == nil then amount = pcount * p_amount end
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if comment == nil then
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comment = string.format("%s %d %s", pcount < 0 and "Buy" or "Restock",
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math.abs(pcount), p_name)
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powner_comment = string.format("%s %d %s %s %s",
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pcount < 0 and "Sell" or "Restock",
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math.abs(pcount), p_name,
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pcount < 0 and "to" or "by",
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username)
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end
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end
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end
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if amount == nil then
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return error_box("unknown product")
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end
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end
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if amount == nil then
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return error_box("amount invalid")
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end
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if comment == nil or comment:match("^[%w_ -]*$") == nil then
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return error_box("comment invalid")
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end
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local log = io.open("log", "a+")
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if log == nil then
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return error_box("failed to open log")
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end
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local time = os.time()
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-- subtract from buyer
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log:write(string.format("%d,%s,%d,%s,%s,%s\n", time, username, amount, pcode or "", pcount or "", comment))
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-- add to owner
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if powner then
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-- count is always zero as doesn't affect stock
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log:write(string.format("%d,%s,%d,%s,%s,%s\n", time, powner, -amount, pcode or "", "", powner_comment))
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end
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log:flush()
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log:close()
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return format([[
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<div class="notif"><p>Transaction successful: {amount} ({!comment})</p></div>
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<audio src="{sound}" autoplay></audio>
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]], {
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sign = amount >= 0 and "pos" or "neg",
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amount = format_amount(amount, "strong"),
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comment = escape(comment),
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sound = config.transaction_sound or ""
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})
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end
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local function r_user(username)
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local notif = nil
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if method == "POST" then
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notif = r_user_post(username)
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end
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return respond(200, string.format("Abrechenbarheit: %s", username), function()
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print(format("<h1>{username}</h1>", { username = username }))
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local balance = balances()[username]
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local last_txn = last_txns()[username]
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local new_user = balance == nil
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balance = balance or 0
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if notif then print(notif) end
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if new_user then
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print([[<div class="notif"><p><i>{user.lazy_creation}</i></p></div>]])
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else
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print([[<div class="backgroundbox userinfo">]])
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print(format([[{user.balance}: <br>{amount}<br>]],
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{ sign = balance >= 0 and "pos" or "neg", amount = format_amount(balance, "span", "balance-value") }))
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print(format([[{user.last_txn} <a href="/{username}?log">{user.view_log}</a>]],
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{ time = format_duration(os.time() - last_txn), username = urlencode(username) }))
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print([[</div>]])
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end
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print([[<div class="transactions container firstchildlarge">]])
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print([[<div class="amount-presets backgroundbox">]])
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for _, type in ipairs({ 1, -1 }) do
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for _, amount in ipairs({ 50, 100, 150, 200, 500, 1000 }) do
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print(string.format([[
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<form action="" method="POST">
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<input type="number" name="amount" id="amount" value="%d" hidden />
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<input type="text" name="comment" id="comment" value="" hidden />
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<input type="submit" value="%s%.02f€" class="amount-%s button" />
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</form>
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]], amount * type, ({ [-1] = "-", [1] = "+" })[type], amount / 100,
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({ [-1] = "neg", [1] = "pos" })[type]))
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end
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end
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print("</div>")
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print(format([[
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<form class="transaction box backgroundbox" action="" method="POST">
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<h3>{user.form.transaction}</h3>
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<label for="amount">Amount (ct): </label>
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<input type="number" name="amount" id="amount" />
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<label for="comment">Comment: </label>
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<input type="text" name="comment" id="comment" />
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<input type="submit" value="{user.form.transaction.submit}" class="amount-ntr button" />
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</form>
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<form class="transaction box backgroundbox" action="" method="POST" id="buy_product">
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<h3>{user.form.buy}</h3>
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<input type="text" name="negate_pcount" value="1" hidden />
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<label for="pcount">Count: </label>
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<input type="number" name="pcount" id="pcount" value="1" />
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<label for="pcode">{field.barcode}: </label>
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<input type="text" name="pcode" id="pcode" />
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<input class="amount-neg button" type="submit" value="{user.form.buy.submit}" />
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</form>
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<form class="transaction box backgroundbox" action="" method="POST" id="buy_product">
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<h3>{user.form.restock}</h3>
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<label for="pcount">{field.count}: </label>
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<input type="number" name="pcount" id="pcount" value="1" />
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<label for="amount">{field.upstream_price}: </label>
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<input type="number" name="amount" id="amount" />
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<label for="pcode">{field.barcode}: </label>
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<input type="text" name="pcode" id="pcode" />
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<input type="submit" value="{user.form.restock.submit}" class="button amount-pos" />
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</form>
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]]))
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print("</div>")
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end)
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end
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local function r_log(filter)
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return respond(200, "Abrechnungen", function()
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print([[<table class="log"]])
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print([[<thead><tr>
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<th>Time</th>
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<th>Username</th>
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<th>Amount</th>
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<th>P.-Barcode</th>
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<th>P.-Count</th>
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<th>Comment</th>
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<th>Actions</th>
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</tr></thead>]])
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print("<tbody>")
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for time, username, amount, pcode, pcount, comment in read_log() do
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if filter == nil or filter == username then
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print(string.format([[
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<tr>
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<td>%s (%s ago)</td>
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<td>%s</td>
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<td class="amount-%s">%.02f€</td>
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<td>%s</td>
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<td>%s %s</td>
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<td>%s</td>
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<td>
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<form action="/%s" method="POST">
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<input type="number" name="amount" id="amount" value="%d" hidden />
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<input type="text" name="comment" id="comment" value="Revert %s" hidden />
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<input type="submit" class="amount-ntr button" value="Revert" />
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</form>
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</td>
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</tr>
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]],
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os.date("!%Y-%m-%dT%H:%M:%SZ", time), format_duration(os.time() - time),
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escape(username),
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amount >= 0 and "pos" or "neg", amount / 100,
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escape(pcode) or "",
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pcount and (pcount < 0 and "buy" or "stock") or "", pcount and tostring(math.abs(pcount)) or "",
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escape(comment),
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escape(username),
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-amount,
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escape(comment)
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))
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end
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end
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print("</tbody>")
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print("</table>")
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end)
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end
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|
local function r_index()
|
|
return respond(200, "Abrechenbarkeit", function()
|
|
print([[
|
|
<form action="/" method="GET" id="user_creation">
|
|
<h3>User Creation</h3>
|
|
<label for="username">Username: </label>
|
|
<input type="text" name="create_user" id="username" />
|
|
<input type="submit" value="Continue" class="button amount-ntr" />
|
|
</form>
|
|
]])
|
|
print([[<div class="userlist"></div>]]) -- for printing
|
|
print([[<ul class="userlist">]])
|
|
for _, user in ipairs(get_active_users()) do
|
|
print(string.format([[
|
|
<li><a href="/%s"><span class="name">%s</span> <span class="amount amount-%s">%.02f€</span></a></li>
|
|
]],
|
|
urlencode(user.username),
|
|
escape(user.username),
|
|
user.balance >= 0 and "pos" or "neg", user.balance / 100
|
|
))
|
|
end
|
|
print("</ul>")
|
|
end)
|
|
end
|
|
|
|
local function validate_username(username)
|
|
-- disallow leading or traling whitespace
|
|
return username ~= nil
|
|
and username:match("^([%w_ -]+)$") ~= nil
|
|
and username:match("^%s") == nil
|
|
and username:match("%s$") == nil
|
|
end
|
|
|
|
local function r_create_user()
|
|
local username = query.create_user
|
|
if not validate_username(username) then
|
|
return respond_error("invalid username " .. username)
|
|
end
|
|
return redirect(string.format("/%s", urlencode(username)))
|
|
end
|
|
|
|
local function r_products_post()
|
|
local data = form_data()
|
|
local barcode = data.barcode
|
|
if barcode == nil then
|
|
return error_box("barcode unset")
|
|
end
|
|
if barcode:match("^[%w_-]*$") == nil then
|
|
return error_box("barcode invalid")
|
|
end
|
|
if data.delete then
|
|
local new_products = io.open("products.new", "w+")
|
|
if new_products == nil then
|
|
return error_box("failed to open new products")
|
|
end
|
|
for a_barcode, price, name, owner in read_products() do
|
|
if barcode ~= a_barcode then
|
|
new_products:write(string.format("%s,%d,%s,%s\n", a_barcode, price, name, owner))
|
|
end
|
|
end
|
|
new_products:flush()
|
|
new_products:close()
|
|
os.rename("products.new", "products")
|
|
else
|
|
local price = tonumber(data.price)
|
|
local name = data.name
|
|
if price == nil then
|
|
return error_box("price invalid")
|
|
end
|
|
if name:match("^[%w_ -]*$") == nil then
|
|
return error_box("name invalid")
|
|
end
|
|
local products = io.open("products", "a+")
|
|
if products == nil then
|
|
return error_box("failed to open products")
|
|
end
|
|
local owner = data.owner or ""
|
|
if name:match("^[%w_ -]*$") == nil then
|
|
return error_box("owner invalid")
|
|
end
|
|
products:write(string.format("%s,%d,%s,%s\n", barcode, price, name, owner))
|
|
products:flush()
|
|
products:close()
|
|
end
|
|
end
|
|
|
|
local function r_products()
|
|
local notif = nil
|
|
if method == "POST" then
|
|
notif = r_products_post()
|
|
end
|
|
respond(200, "Abrechenbare Product List", function()
|
|
print("<h1>Product List</h1>")
|
|
if notif then print(notif) end
|
|
print([[
|
|
<div class="container">
|
|
<form action="/?products" method="POST" class="box backgroundbox">
|
|
<h3>Add Product</h3>
|
|
<label for="name">Name: </label>
|
|
<input type="text" name="name" id="name" />
|
|
<label for="price">Price (ct): </label>
|
|
<input type="number" name="price" id="price" />
|
|
<label for="owner">Owner: </label>
|
|
<input type="text" name="owner" id="owner" />
|
|
<label for="barcode">Barcode: </label>
|
|
<input type="text" name="barcode" id="barcode" />
|
|
<input type="submit" value="Add" class="amount-ntr button" />
|
|
</form>
|
|
<form action="/?products" method="POST" class="box backgroundbox">
|
|
<h3>Remove Product</h3>
|
|
<input type="text" name="delete" value="1" hidden />
|
|
<label for="barcode">Barcode: </label>
|
|
<input type="text" name="barcode" id="barcode" />
|
|
<input type="submit" value="Remove"class="amount-ntr button" />
|
|
</form>
|
|
</div>
|
|
]])
|
|
print([[<table class="productlist"><tr>
|
|
<th>Name</th>
|
|
<th>Price</th>
|
|
<th>Barcode</th>
|
|
<th>Count</th>
|
|
<th>Owner</th>
|
|
</tr>]])
|
|
local pbals = product_balances()
|
|
for barcode, price, name, owner in read_products() do
|
|
print(string.format([[
|
|
<tr><td>%s</td><td class="amount-%s">%.02f€</td><td>%s</td><td>%s</td><td>%s</td></tr>
|
|
]],
|
|
name,
|
|
-price >= 0 and "pos" or "neg", -price / 100,
|
|
barcode,
|
|
pbals[barcode] or "0",
|
|
owner
|
|
))
|
|
end
|
|
print("</table>")
|
|
end)
|
|
end
|
|
|
|
local function r_about()
|
|
respond(200, "About Abrechenbarkeit", function()
|
|
print([[
|
|
<h1>About Abrechenbarkeit</h1>
|
|
<p>Abrechenbarkeit is a simple trust-based ledger for keeping track of money spent on product.</p>
|
|
<p>Abrechenbarkeit is free software. It is licensed exclusively GNU Affero General Public License Version 3 only.<p>
|
|
<p>The source code is published on <a href="https://codeberg.org/metamuffin/strichliste">Codeberg</a>. This is also where <a href="https://codeberg.org/metamuffin/strichliste/issues">issues with this software</a> should be reported.</p>
|
|
<p>Thanks for choosing Abrechenbarkeit.</p>
|
|
]])
|
|
end)
|
|
end
|
|
|
|
local function extract_username()
|
|
if path == nil then
|
|
return respond_error("no path")
|
|
end
|
|
local username = urldecode(path:sub(2))
|
|
if username == nil or username:match("^([%w_ -]+)$") == nil then
|
|
return nil
|
|
end
|
|
return username
|
|
end
|
|
|
|
if path == "/" then
|
|
if query.about then
|
|
return r_about()
|
|
elseif query.products then
|
|
return r_products()
|
|
elseif query.log then
|
|
return r_log()
|
|
elseif query.create_user then
|
|
return r_create_user()
|
|
else
|
|
return r_index()
|
|
end
|
|
else
|
|
local username = extract_username()
|
|
if username == nil or not validate_username(username) then
|
|
return respond_error("username invalid")
|
|
elseif query.log then
|
|
return r_log(username)
|
|
else
|
|
return r_user(username)
|
|
end
|
|
end
|