Körperbewegung

mods/modlib/web/html.lua

@@ -0,0 +1,27 @@
+local html = setmetatable({}, {__index = function(self, key)
+	if key == "unescape" then
+		local func = assert(loadfile(modlib.mod.get_resource("modlib", "web", "html", "entities.lua")))
+		setfenv(func, {})
+		local named_entities = assert(func())
+		local function unescape(text)
+			return text
+				:gsub("&([A-Za-z]+);", named_entities) -- named
+				:gsub("&#(%d+);", function(digits) return modlib.utf8.char(tonumber(digits)) end) -- decimal
+				:gsub("&#x(%x+);", function(digits) return modlib.utf8.char(tonumber(digits, 16)) end) -- hex
+		end
+		self.unescape = unescape
+		return unescape
+	end
+end})
+
+function html.escape(text)
+	return text:gsub(".", {
+		["<"] = "&lt;",
+		[">"] = "&gt;",
+		["&"] = "&amp;",
+		["'"] = "&apos;",
+		['"'] = "&quot;",
+	})
+end
+
+return html

mods/modlib/web/uri.lua

@@ -0,0 +1,42 @@
+-- URI escaping utilities
+-- See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURI
+
+local uri_unescaped_chars = {}
+for char in ("-_.!~*'()"):gmatch(".") do
+	uri_unescaped_chars[char] = true
+end
+local function add_unescaped_range(from, to)
+	for byte = from:byte(), to:byte() do
+		uri_unescaped_chars[string.char(byte)] = true
+	end
+end
+add_unescaped_range("0", "9")
+add_unescaped_range("a", "z")
+add_unescaped_range("A", "Z")
+
+local uri_allowed_chars = table.copy(uri_unescaped_chars)
+for char in (";,/?:@&=+$#"):gmatch(".") do
+	-- Reserved characters are allowed
+	uri_allowed_chars[char] = true
+end
+
+local function encode(text, allowed_chars)
+	return text:gsub(".", function(char)
+		if allowed_chars[char] then
+			return char
+		end
+		return ("%%%02X"):format(char:byte())
+	end)
+end
+
+local uri = {}
+
+function uri.encode_component(text)
+	return encode(text, uri_unescaped_chars)
+end
+
+function uri.encode(text)
+	return encode(text, uri_allowed_chars)
+end
+
+return uri