rojo/plugin/http/Error.lua

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