Module:Data

The Data module exists to translate information from Data: pages to templates/articles.

Arguments

<1> (Entity): This argument is taken as the title of the intended Data: page to search through.

E.g.: "Kerbol", "LW-Sw "SWERV""

<2+> (Parameter chain): Arguments 2 and beyond define the parameter chain to search on the data page.

E.g.: "mass", "max_temp", "modules|engine|isp_vac", "modules|generator|outputs|units"

Functions

getData: The primary function of the module. Accepts the full argument set to determine the parameter to return from the subject.

getFuelLabels: Used for engine infobox construction. Accepts a part name (only works for engines) for <1> and optionally "alt" for <2>. Returns a line-break separated list of the propellant names used by an engine mode. Should probably be moved to a different Module.

getFuelValues: Used for engine infobox construction. Accepts a part name (only works for engines) for <1> and optionally "alt" for <2>. Returns a line-break separated list of the propellant use rates of an engine mode. Should probably be moved to a different Module.

Examples

A list of example JSON sets can be found at Data:Example.

{{#invoke:Data|getData|LV-SW "SWERV"|mass}} - Returns the mass of the "SWERV" in tons, 10.00.

{{#invoke:Data|getData|LV-3000 "Tuba"|modules|engine|thrust|vac}} - Returns the vacuum thrust of the "Tuba" in kilonewtons, 510.0.

---

local p = {}
local getArgs = require('Module:Arguments').getArgs

function p.getData(frame)
	-- Get arguments from the invoke
	-- E.g., args = {"Example/engine", "modules", "engine", "isp", "vac"}
	local args = getArgs(frame, {frameOnly = true})
	-- Pass arguments to the helper function
	dataJson = p._getData(args)
	return dataJson
end

function p._getData(args)
	-- Load the data from the JSON page, parsed as a table of tables
	local dataJson = mw.loadJsonData("Data:"..args[1])
	
	-- Iterate through dataJson using the args values as keys to 
	-- step down into the table per argument
	for k, v in pairs(args) do
		if k > 1 then
			dataJson = dataJson[v]
		end
	end

	-- Send the final, requested value back to the main function
	return dataJson
end

return p