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2021-07-08T13:14:29Z

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-- This module implements {{for loop}}.

local getArgs = require('Module:Arguments').getArgs
local yesno = require('Module:Yesno')
local 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 calltemplates = yesno(args.substall or "", true) or not mw.isSubsting()
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 _, v in ipairs(variableVals) do
v = mw.text.trim(v)
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
if calltemplates then
local output = p.callTemplate(template, targs)
if #mw.text.trim(output) == 0 then
addSeparator = false
end
result = result .. output
else
local makeTemplate = require('Module:Template invocation').invocation
result = result .. makeTemplate(template, targs)
end
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 = {}
if args.start or args.stop or args.by then
if args[2] then
error("Both start/stop/by and numbered parameters specified")
end
local start = tonumber(args.start or 1)
local stop = tonumber(args.stop or 1)
local by = tonumber(args.by or 1)
for i = start, stop, by do
variableVals [#variableVals + 1] = i
end
else
for i, v in ipairs(args) do
if i ~= 1 then
variableVals[i - 1] = v
end
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, _ 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

Module:For loop - Revision history

FilipeFonseca: 1 revision imported