View source for Module:Exists | Roblox Wiki

You do not have permission to edit this page, for the following reasons:

The action you have requested is limited to users in one of the groups: Autoconfirmed Users, Emailconfirmed Users, Fandom Helpers, Wiki Specialists.
This page has been protected from editing because it is transcluded in the following pages, which are protected with the "cascading" option turned on:
You must confirm your email address before editing pages. Please set and validate your email address through your user preferences.

You can view and copy the source of this page.

--- This module provides functions related to existence of wiki pages.
local cache = require("mw.ext.LuaCache")
local utils = require("Module:Utils")

local p = {}

--- Returns whether a page with a provided title exists, as well as whether or not an expensive function call was used.
-- The results of calls to this function are cached and reused site-wide to minimize expensive function calls and minimize recording links. This is done using the [[w:Help:LuaCache|LuaCache]] extension. The cache duration is a randomly selected amount of seconds between 1 and 4 days.
-- @param {string} title Title of the page
-- @param {number} exp_time Override the default random expiration time of the data with a custom value.
-- @return {boolean} Whether a page with the provided title exists
-- @return {boolean} Whether or not an expensive method call was used
function p.title_expcheck(title, exp_time)
	local exists = cache.get("exists.title." .. title)
	if exists == false or exists == true then
		return exists, false
	elseif exists ~= nil then
		return error("value exists." .. title .. " in cache should be a boolean or nil")
	end
	local title_object = mw.title.new(title)
	if title_object == nil then
		return error('"' .. title .. '" is not a valid MediaWiki page title.')
	end
	local exists = title_object.exists
	local expiry_modifier = exists and 90 or 0
	cache.set("exists.title." .. title, exists, exp_time or utils.random_expiration() + (86400 * expiry_modifier))
	return exists, true
end

--- Returns whether a page with a provided title exists.
-- The results of calls to this function are cached and reused site-wide to minimize expensive function calls and minimize recording links. This is done using the [[w:Help:LuaCache|LuaCache]] extension. The cache duration is a randomly selected amount of seconds between 1 and 4 days.
-- @param {string} title Title of the page
-- @param {number} exp_time Override the default random expiration time of the data with a custom value.
-- @return {boolean} Whether a page with the provided title exists
function p.title(title, exp_time)
	local exists, expensive = p.title_expcheck(title, exp_time)
	return exists
end

return p

Templates used on this page:

Return to Module:Exists.