Module:Check for deprecated parameters

-- This module may be used to compare the arguments passed to the parent -- with a list of arguments, returning a specified result if an argument is -- on the list local p = {}

local function trim(s) return s:match('^%s*(.-)%s*$') end

local function isnotempty(s) return s and trim(s) ~= '' end

function p.check (frame) -- create the table of deprecated values and their matching new value local args = frame.args local dep_values = {} for k, v in pairs(args) do		if k == 'ignoreblank' or k == 'preview' or k == 'deprecated' then else dep_values[k] = v		end end

-- loop over the parent args and see if any are deprecated local values = {} local ignoreblank = isnotempty(frame.args['ignoreblank']) local pargs = frame:getParent.args for k, v in pairs(pargs) do		if ignoreblank then if dep_values[k] and v~='' then table.insert(values, k)			end else if dep_values[k] then table.insert(values, k)			end end end -- add results to the output tables local res = {} if #values > 0 then local preview = frame.args['preview'] or			'Page using '..frame:getParent:getTitle..' with deprecated parameter _VALUE_' if isnotempty(preview) then preview = require('Module:If preview')._warning({				preview			}) end -- Kind of dangerous to trust that this is never nil, but I guess it's		-- preferable to display that the use of the module is broken rather than -- have some sort of tracking category for pages which have an unknown -- parent tracking template. local category = frame.args['category'] for k, v in pairs(values) do			local c = category:gsub('_VALUE_', v)			table.insert(res, c)			if v == '' then -- Fix odd bug for | = which gets stripped to the empty string -- and breaks category links v = ' ' end local p = preview:gsub(				'_VALUE_',				'"'..v..'". Replace with "'..dep_values[v]..'".'			) table.insert(res, p ) end end

return table.concat(res) end

return p