Reorganize and clean up plugin

plugin/http/Error.lua

@@ -0,0 +1,66 @@
+local Error = {}
+Error.__index = Error
+
+Error.Kind = {
+	HttpNotEnabled = {
+		message = "Rojo requires HTTP access, which is not enabled.\n" ..
+			"Check your game settings, located in the 'Home' tab of Studio.",
+	},
+	ConnectFailed = {
+		message = "Couldn't connect to the Rojo server.\n" ..
+			"Make sure the server is running -- use 'rojo serve' to run it!",
+	},
+	Timeout = {
+		message = "Request timed out.",
+	},
+	Unknown = {
+		message = "Unknown error: {{message}}",
+	},
+}
+
+setmetatable(Error.Kind, {
+	__index = function(_, key)
+		error(("%q is not a valid member of Http.Error.Kind"):format(tostring(key)), 2)
+	end,
+})
+
+function Error.new(type, extraMessage)
+	extraMessage = extraMessage or ""
+	local message = type.message:gsub("{{message}}", extraMessage)
+
+	local err = {
+		type = type,
+		message = message,
+	}
+
+	setmetatable(err, Error)
+
+	return err
+end
+
+function Error:__tostring()
+	return self.message
+end
+
+--[[
+	This method shouldn't have to exist. Ugh.
+]]
+function Error.fromErrorString(message)
+	local lower = message:lower()
+
+	if lower:find("^http requests are not enabled") then
+		return Error.new(Error.Kind.HttpNotEnabled)
+	end
+
+	if lower:find("^httperror: timedout") then
+		return Error.new(Error.Kind.Timeout)
+	end
+
+	if lower:find("^httperror: connectfail") then
+		return Error.new(Error.Kind.ConnectFailed)
+	end
+
+	return Error.new(Error.Kind.Unknown, message)
+end
+
+return Error