Module:Television crossover note

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Module:Television crossover note is used to add a note into the episode summary of the television crossover episodes, noting the crossover and other episodes contained within it.

Usage

• {{#invoke:Television crossover note|main}}

Parameter list

Parameter	Explanation	Requirement
part	The crossover part number of the current episode.	Required
parts	The number of total crossover episodes.	Required
no_hr	Any value will disable the addition of the <hr> tag.	Optional
1...5	The TV series which are part of the crossover, by order of crossover appearance.	Required
series1...series5	Optional replacement for the positional TV series parameters.	Optional

The above documentation is transcluded from Module:Television crossover note/doc. (edit | history)
Editors can experiment in this module's sandbox (create | mirror) and testcases (edit | run) pages.
Subpages of this module.

local description = {
	[1] = {
		[1] = "This episode is a crossover with %s."
	},
	[2] = {
		[1] = "This episode begins a crossover event that concludes on %s.",
		[2] = "This episode concludes a crossover event that begins on %s."
	},
	[3] = {
		[1] = "This episode begins a crossover event that continues on %s and concludes on %s.",
		[2] = "This episode continues a crossover event that begins on %s and concludes on %s.",
		[3] = "This episode concludes a crossover event that begins on %s and continues on %s."
	},
	[4] = {
		[1] = "This episode begins a crossover event that continues on %s and %s, and concludes on %s.",
		[2] = "This episode continues a crossover event that begins on %s continues on %s, and concludes on %s.",
		[3] = "This episode continues a crossover event that begins on %s and %s, and concludes on %s.",
		[4] = "This episode concludes a crossover event that begins on %s and continues on %s and %s."
	},
	[5] = {
		[1] = "This episode begins a crossover event that continues on %s, %s, and %s, and concludes on %s.",
		[2] = "This episode continues a crossover event that begins on %s, continues on %s and %s, and concludes on %s.",
		[3] = "This episode continues a crossover event that begins on %s and %s, continues on %s, and concludes on %s.",
		[4] = "This episode continues a crossover event that begins on %s, %s, and %s, and concludes on %s.",
		[5] = "This episode concludes a crossover event that begins on %s, and continues on %s, %s, and %s."
	}
}

local errorMessages = {
	["MISSING_VALUE"] = "missing |%s= value",
	["NOT_A_NUMBER"] = "value of |%s= should be a number",
}

local errors = {}

local p = {}

--[[
Local function which is used to create an error message.
--]]
local function createErrorMsg(errorText) 
	local errorMsg = '<span style="font-size:100%;" class="error"> <strong>Error: </strong>' .. errorText .. '.</span>'
	table.insert(errors, errorMsg)
end

--[[
Local function which gets the series list from either the numbered (positional) or named parameters,
and checks if the number of series parameters match the value of parts - creates an error message if they aren't.
Returns the series list or nil.
--]]
local function getSeriesList(parts, args)
	local seriesList = {}

	parts = parts - 1
	if (parts < 1) then
		parts = 1
	end
	
	for i = 1, parts do
		if (args[i] or args["series" .. i]) then
			seriesList[i] = args[i] or args["series" .. i]
		else
			createErrorMsg(string.format(errorMessages["MISSING_VALUE"], i)) 
			return nil
		end
	end
	
	return seriesList
end

--[[
Local function which checks if the parameters used are correct.
Creates an error message if they aren't.
--]]
local function isArgValidNumber(name, value)
	if (value) then
		if (tonumber(value)) then
			return tonumber(value)
		else
			createErrorMsg(string.format(errorMessages["NOT_A_NUMBER"], name))
			return nil 
		end
	else
		createErrorMsg(string.format(errorMessages["MISSING_VALUE"], name)) 
		return nil
	end
end

--[[
Local function which is used to handle the actual main proccess.
--]]
local function _main(args)
	local parts = isArgValidNumber("parts", args.parts)
	local currentPart = isArgValidNumber("part", args.part)

	-- If missing parts or current part values, show an error.
	if (not parts or not (currentPart or parts == 1)) then
		-- Error message handling.
		return table.concat(errors)
	end

	local seriesList = getSeriesList(parts, args)

	-- If missing series parts, show an error.
	if (not seriesList) then
		-- Error message handling.
		return table.concat(errors)
	end

	if (parts == 1) then
		currentPart = 1
	end

	local text = string.format(description[parts][currentPart], seriesList[1], seriesList[2], seriesList[3], seriesList[4], seriesList[5])
	if (args.no_hr) then
		return text
	else
		return "<hr>" .. text
	end
end

--[[
Public function which is used to handle the logic for creating a note for television crossover episodes.

Parameters:
	-- |part=					— required; The crossover part number of the current episode.
	-- |parts=					— required; The number of total crossover episodes.
	-- |no_hr=					— optional; Any value will disable the addition of the <hr> tag.
	-- |1...5=					— required; The TV series which are part of the crossover, by order of crossover appearance.
	-- |series1...series5=		— optional; Optional replacement for the positional series parameters.
--]]
function p.main(frame)
	local getArgs = require('Module:Arguments').getArgs
	local args = getArgs(frame)
	return _main(args)
end

return p