Модуль:Check for unknown 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
-- not on the list
-- modified at ukwiki
local p = {}

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

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

local function clean(text)
	-- Return text cleaned for display and truncated if too long.
	-- Strip markers are replaced with dummy text representing the original wikitext.
	local pos, truncated
	local function truncate(text)
		if truncated then
			return ''
		end
		if mw.ustring.len(text) > 25 then
			truncated = true
			text = mw.ustring.sub(text, 1, 25) .. '...'
		end
		return mw.text.nowiki(text)
	end
	local parts = {}
	for before, tag, remainder in text:gmatch('([^\127]*)\127[^\127]*%-(%l+)%-[^\127]*\127()') do
		pos = remainder
		table.insert(parts, truncate(before) .. '<' .. tag .. '>...</' .. tag .. '>')
	end
	table.insert(parts, truncate(text:sub(pos or 1)))
	return table.concat(parts)
end

function p._check(args, pargs)
	if type(args) ~= "table" or type(pargs) ~= "table" then
		-- TODO: error handling
		return
	end
	
	
	local unknown = args['unknown'] or '<s>|_VALUE_=</s>, '-- якщо не задано
	local preview = args['preview'] or '<s>|_VALUE_=</s>, '-- завжди попередж. в прев'ю
	local revisionid = isnotempty( mw.getCurrentFrame():preprocess( "{{REVISIONID}}" ) )
	local function nounderscore( pargs )
    	for k, v in pairs(pargs) do
    		k = mw.ustring.gsub(k, '[_]', ' ')
    	end
    	return pargs
	end
	
	-- create the list of known args, regular expressions, and the return string
	local knownargs = {}
	local regexps = {}
	for k, v in pairs(args) do
    	if type(k) == 'number' then
    		v = trim(v)
    		knownargs[v] = 1
    	elseif k:find('^regexp[1-9][0-9]*$') then
    		table.insert(regexps, '^' .. v .. '$')
    	end
	end
	if not isnotempty(preview) then preview = unknown end
	
	-- loop over the parent args, and make sure they are on the list
	local ignoreblank = isnotempty(args['ignoreblank'])
	local showblankpos = isnotempty(args['showblankpositional'])
	local values = {}
	for k, v in pairs(pargs) do
    	if type(k) == 'string' and knownargs[k] == nil then
    		local knownflag = false
    		for _, regexp in ipairs(regexps) do
        		if mw.ustring.match(k, regexp) then
        			knownflag = true
        			break
        		end
    		end
    		if not knownflag and ( not ignoreblank or isnotempty(v) ) then
        		table.insert(values, clean(k))
    		end
    	elseif type(k) == 'number' and knownargs[tostring(k)] == nil then
    		local knownflag = false
			for _, regexp in ipairs(regexps) do
				if mw.ustring.match(tostring(k), regexp) then
					knownflag = true
					break
				end
			end
			if not knownflag and ( showblankpos or isnotempty(v) ) then
				table.insert(values, k .. ' = ' .. clean(v))
			end
    	end
	end
	
	-- add resuls to the output tables
	local res = {}
	if #values > 0 then
    	if not revisionid then unknown = preview
	end
    for k, v in pairs(values) do
		-- Fix odd bug for | = which gets stripped to the empty string and
		-- breaks category links
    	if v == '' then v = ' ' end
    		local r = unknown:gsub('_VALUE_', v)
    		table.insert(res, r)
    	end
    	if not revisionid then
    		table.insert(res, 1, '<div class="hatnote" style="color:red; border:1px dashed pink; border-radius:10px;"><strong>Увага:</strong> {{[['
        	.. tostring(mw.getCurrentFrame():getParent():getTitle()) .. ']]}}: не розумію параметр(и):<br/><span style="font-color:black;font-size:85%;">')
    		table.insert(res, '</span><br/>(це повідомлення лише в попередперегляді). [[Вікіпедія:Проєкт:Шаблони#Параметри шаблонів|Докладніше]]</div>')
    	end
	end
	return table.concat(res)
end

function p.check(frame)
	local args = frame.args
	local pargs = frame:getParent().args
	return p._check(args, pargs)
end

return p