Module:Carousel/sandbox

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Carousel returns one of a list of image filenames.

The index of the one chosen increments every 'switchsecs', which is a parameter giving the number of seconds between switches.

• switchsecs=3600 would switch every hour
• switchsecs=43200 would be every 12 hours
• switchsecs=86400 would be daily (the default)

Usage

Generic:

• {{#invoke:carousel | main | name = name-of-data-module | switchsecs = number-of-seconds }}

Examples:

• {{#invoke:carousel | main }} for 24 hours between switches using default list
• {{#invoke:carousel | main | switchsecs = 10}} for 10 sec between switches using default list
• {{#invoke:carousel | main | name= | switchsecs = 1}} 1 sec between switches using default list
• {{#invoke:carousel | main | name=Komodobish | switchsecs = 5}} 5 sec using Komodobish's list
• {{#invoke:carousel | main | name=54129 | switchsecs = 43200}} 12 hours using Serial Number 54129's list

The image lists are at Special:PrefixIndex/Module:Carousel/, e.g. Module:Carousel/Komodobish for name=Komodobish.

Typically it will be used with standard image syntax:

• [[File:{{#invoke:carousel | main | name=Komodobish | switchsecs = 5}} | upright=1.25 | center | thumb | message goes here]] →

  

  message goes here

The above documentation is transcluded from Module:Carousel/doc. (edit | history)
Editors can experiment in this module's sandbox (edit | diff) and testcases (edit) pages.
Add categories to the /doc subpage. Subpages of this module.

p = {}

-- carousel returns one of a list of image filenames
--
-- the index of the one chosen increments every 'switchsecs'
-- which is a parameter giving the number of seconds between switches
-- 3600 would switch every hour
-- 43200 would be every 12 hours
-- 86400 would be daily (the default)
--
-- The list of filenames is in a named submodule, so everyone can have their own list.
-- For Bishonen (the default), the module is [[Module:Carousel/Shonen]].
-- For Serial Number 54129, the module is [[Module:Carousel/54129]].
--
-- {{#invoke:carousel | main | name = name-of-datamodule | switchsecs = number-of-seconds }}
-- {{#invoke:carousel | main | name = 54129 | switchsecs = 10 }} for 10 sec switches using [[Module:Carousel/54129]]
-- {{#invoke:carousel | main }} for 24 hours between switches using the default data module
--

p.main = function(frame)
	-- get parameter switchsecs; if NaN or less than 1, set default
	local switchtime = tonumber(frame.args.switchsecs) or 86400
	if switchtime < 1 then switchtime = 86400 end

	-- get parameter dataname; if missing, use default
	local dataname = frame.args.name or ""
	if dataname == "" then dataname = "Shonen" end

	-- there should be a named data module as a submodule
	-- it returns a sequential table of filenames
	local imgs = mw.loadData("Module:Carousel/" .. dataname)
	local numimgs = #imgs

	-- 'now' increments by 1 every switchtime seconds
	local now = math.floor( os.time() / switchtime )

	-- set an index between 1 and number of images
	local idx = now % numimgs + 1
	return imgs[idx]
end

return p