2024-10-30 01:00:27 +00:00
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#!/usr/bin/env luajit
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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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2024-10-30 12:50:36 +00:00
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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 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 stylesheet = [[
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/* body { background-color: #161616; }
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h1, h2, h3, h4, h5, h6, p, label, a { color: #e2e2e2; } */
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.amount-presets form { display: inline-block; width: 60px }
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.amount-pos { color: green; }
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.amount-neg { color: red; }
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nav h2 { display: inline-block }
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.notif { padding: 0.5em; margin: 0.5em; background-color: #ddd; }
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2024-10-30 13:15:18 +00:00
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.notif p { margin: 5px; }
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form.box { border: 2px solid grey; padding: 0.5em; margin: 0.5em; display: inline-block; }
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form h3 { margin: 5px; }
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2024-10-30 12:50:36 +00:00
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]]
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local script = [[
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]]
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2024-10-30 01:00:27 +00:00
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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(string.format([[
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<html><head>
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<title>%s</title>
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<meta charset="utf-8" />
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2024-10-30 12:50:36 +00:00
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<style>%s</style>
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<script>%s</script>
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</head>
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<body>
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<nav>
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<h2><a href="/">Strichliste v2</a></h2>
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<span><a href="/?log">View Log</a></span>
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<span><a href="https://codeberg.org/metamuffin/strichliste">Source</a></span>
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</nav>
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]], escape(title), stylesheet, script))
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2024-10-30 01:00:27 +00:00
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body()
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print("</body></html>")
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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(string.format("<p>Error: %s</p>", escape(message)))
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end)
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end
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2024-10-30 11:20:03 +00:00
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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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2024-10-30 01:00:27 +00:00
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local function form_data()
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2024-10-30 12:50:36 +00:00
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return parse_query(io.read())
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2024-10-30 01:00:27 +00:00
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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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2024-10-30 12:50:36 +00:00
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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, comment = string.match(l, "(%d+),([%w_ -]+),(-?%d+),([%w_ -]*)")
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2024-10-30 01:00:27 +00:00
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return tonumber(time), username, tonumber(amount), comment
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end
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end
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2024-10-30 12:50:36 +00:00
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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, amount, name = string.match(l, "([%w_-]+),(-?%d+),([%w_ -]*)")
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return barcode, tonumber(amount), name
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end
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end
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2024-10-30 01:00:27 +00:00
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2024-10-30 01:11:09 +00:00
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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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2024-10-30 11:20:03 +00:00
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local function r_user()
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if path == nil then
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return respond_error("no path")
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2024-10-30 01:11:09 +00:00
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end
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2024-10-30 12:50:36 +00:00
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local username = urldecode(path:sub(2))
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if username == nil or username:match("^([%w_ -]+)$") == nil then
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2024-10-30 01:00:27 +00:00
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return respond_error("username invalid")
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end
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2024-10-30 12:50:36 +00:00
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local notif = nil
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2024-10-30 01:00:27 +00:00
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if method == "POST" then
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local data = form_data()
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2024-10-30 12:50:36 +00:00
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local amount = nil
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local comment = ""
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if data.barcode then
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for p_barcode, p_amount, p_name in read_products() do
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if p_barcode == data.barcode then
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amount = p_amount
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comment = p_name
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end
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end
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else
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amount = tonumber(data.amount)
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comment = data.comment or ""
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end
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2024-10-30 01:00:27 +00:00
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if amount == nil then
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return respond_error("amount invalid")
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end
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2024-10-30 12:50:36 +00:00
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if comment:match("^[%w_ -]*$") == nil then
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2024-10-30 01:00:27 +00:00
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return respond_error("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 respond_error("failed to open log")
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end
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local time = os.time()
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2024-10-30 13:15:18 +00:00
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log:write(string.format("%d,%s,%d,%s\n", time, username, amount, comment))
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2024-10-30 01:00:27 +00:00
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log:flush()
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log:close()
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2024-10-30 12:50:36 +00:00
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notif = string.format(
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"<div class=\"notif\"><p>Transaction successful: <strong class=\"amount-%s\">%.02f€</strong> (%s)</p></div>",
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amount >= 0 and "pos" or "neg", amount / 100, escape(comment)
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)
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2024-10-30 01:00:27 +00:00
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end
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2024-10-30 11:20:03 +00:00
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return respond(200, username, function()
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2024-10-30 01:00:27 +00:00
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print(string.format("<h1>%s</h1>", username))
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2024-10-30 12:50:36 +00:00
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local balance = balances()[username]
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local new_user = balance == nil
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balance = balance or 0
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if new_user then
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print([[
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<div class="notif"><p><i>This user account does not exist yet. It will only be created after the first transaction.</i></p></div>
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]])
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end
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if notif then
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print(notif)
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end
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print(string.format("<p>Current balance: <span class=\"amount-%s\">%.02f€</p>", balance >= 0 and "pos" or "neg",
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balance / 100))
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2024-10-30 01:00:27 +00:00
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print([[
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2024-10-30 13:15:18 +00:00
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<form class="transaction box" action="" method="POST">
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<h3>Create Transaction</h3>
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2024-10-30 01:00:27 +00:00
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<label for="amount">Amount: </label>
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<input type="number" name="amount" id="amount" /><br/>
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<label for="comment">Comment: </label>
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<input type="text" name="comment" id="comment" /><br/>
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<input type="submit" value="Update" />
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</form>
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]])
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2024-10-30 12:50:36 +00:00
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print("<div class=\"amount-presets\">")
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2024-10-30 01:00:27 +00:00
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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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2024-10-30 12:50:36 +00:00
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<input type="submit" value="%s%.02f€" class="amount-%s" />
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2024-10-30 01:00:27 +00:00
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</form>
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2024-10-30 12:50:36 +00:00
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]], amount * type, ({ [-1] = "-", [1] = "+" })[type], amount / 100,
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({ [-1] = "neg", [1] = "pos" })[type]))
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2024-10-30 01:00:27 +00:00
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end
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2024-10-30 12:50:36 +00:00
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print("<br/>")
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2024-10-30 01:00:27 +00:00
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end
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2024-10-30 12:50:36 +00:00
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print("</div>")
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2024-10-30 01:00:27 +00:00
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end)
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end
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2024-10-30 11:20:03 +00:00
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local function r_log()
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return respond(200, "Log", function()
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print("<table>")
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print("<tr><th>Time</th><th>Username</th><th>Amount</th><th>Comment</th></tr>")
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for time, username, amount, comment in read_log() do
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2024-10-30 13:15:18 +00:00
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print(string.format("<tr><td>%d</td><td>%s</td><td class=\"amount-%s\">%.02f€</td><td>%s</td></tr>", time,
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escape(username),
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amount >= 0 and "pos" or "neg", amount / 100, escape(comment)))
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2024-10-30 11:20:03 +00:00
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end
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print("</table>")
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end)
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end
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local function r_index()
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return respond(200, "Users", function()
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print([[
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2024-10-30 13:15:18 +00:00
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<form action="/" method="GET" class="box">
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<h3>User Creation</h3>
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2024-10-30 11:20:03 +00:00
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<label for="username">Username: </label>
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<input type="text" name="create_user" id="username" /><br/>
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2024-10-30 12:50:36 +00:00
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<input type="submit" value="Continue" />
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2024-10-30 11:20:03 +00:00
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</form>
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]])
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print("<ul>")
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for username, balance in pairs(balances()) do
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print(string.format("<li><a href=\"/%s\">%s</a>: %.02f€</li>", escape(username), escape(username),
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balance / 100))
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end
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print("</ul>")
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end)
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end
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local function r_create_user()
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2024-10-30 12:50:36 +00:00
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local username = query.create_user
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if username:match("^([%w_ -]+)$") == nil then
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return respond_error("invalid username " .. username)
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2024-10-30 11:20:03 +00:00
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end
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2024-10-30 12:50:36 +00:00
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return redirect(string.format("/%s", urlencode(username)))
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2024-10-30 11:20:03 +00:00
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end
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if path == "/" then
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2024-10-30 12:50:36 +00:00
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if query.log then
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2024-10-30 11:20:03 +00:00
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return r_log()
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2024-10-30 12:50:36 +00:00
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elseif query.create_user then
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2024-10-30 11:20:03 +00:00
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return r_create_user()
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else
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return r_index()
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end
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else
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2024-10-30 12:50:36 +00:00
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return r_user()
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2024-10-30 11:20:03 +00:00
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end
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