Module:ForLoop

-- This module implements .

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

function p.main(frame) local args = getArgs(frame, { trim = false, removeBlanks = false }) return p._main(args) end

function p._main(args) local template = args['call'] or 'void' local variableParam = args.pv variableParam = tonumber(variableParam) or variableParam or 1 -- fix for positional parameters local variableValPrefix = args.prefix or local variableValPostfix = args.postfix or local sep = args[1] or local constantArgs = p.getConstants(args) local variableVals = p.getVariableVals(args)

local result = local addSeparator = false; for i, v in ipairs(variableVals) do v = mw.text.trim(v) -- trim whitespace if #v > 0 or not yesno(args.skipBlanks) then if addSeparator then result = result .. sep end addSeparator = true; local targs = constantArgs targs[variableParam] = variableValPrefix .. v .. variableValPostfix local expandedTemplate = p.callTemplate(template, targs) result = result .. expandedTemplate end end return result end

function p.getConstants(args) local constantArgNums = p.getArgNums(args, 'pc', 'n') local constantArgs = {} for _, num in ipairs(constantArgNums) do local keyArg = 'pc' .. tostring(num) .. 'n' local valArg = 'pc' .. tostring(num) .. 'v' local key = args[keyArg] key = tonumber(key) or key local value = args[valArg] constantArgs[key] = value end return constantArgs end

function p.getVariableVals(args) local variableVals = {} for i, v in ipairs(args) do if i ~= 1 then variableVals[i - 1] = v end end return variableVals end

function p.getArgNums(args, prefix, suffix) -- Returns a table containing the numbers of the arguments that exist -- for the specified prefix and suffix. local nums = {} local pattern = '^' .. prefix .. '([1-9]%d*)' .. suffix .. '$' for k, v in pairs(args) do local num = tostring(k):match(pattern) if num then nums[#nums + 1] = tonumber(num) end end table.sort(nums) return nums end

function p.callTemplate(template, targs) return mw.getCurrentFrame():expandTemplate{title = template, args = targs} end

return p