Mô đun:Title monthname

-- v1.00
Split the page title into words then test each of them against
the list of months.
Optionally, an alternative page name may be supplied as a parameter.
Return the first word which matches a months name ...
unless the "match=" parameter specifies a diffreent match.
If there is no match, then return an empty string ... unles
the "nomatch" parameter specifies something different
local getArgs = require('Mô đun:Arguments').getArgs
local p = {}
-- config
local nomatch = ""
local matchnum = 1
local monthList = {
	'1',
	'2',
	'3',
	'4',
	'5',
	'6',
	'7',
	'8',
	'9',
	'10',
	'11',
	'12'
}
-- splits a string into "words"
-- a "word" is a set of characters delineated at each end by one 
--    or more whitespace characters or punctaution charaters
function splitIntoWords(str)
	result = {}
	index = 1
	s = mw.ustring.gsub(str, "^%s%p+", "") -- strip leading whitespace or punctuation
	for s2 in mw.ustring.gmatch(s, "^%s%p+%s%p*") do
		s3 = mw.ustring.gsub(s2, "%s%p+$", "") -- strip trailing separators
		resultindex = s3
		index = index + 1
	end
return result
end
-- returns the first word is the pagename which matches the name of a month
-- ... or an empty string if there is no match
function checkPagename(pn)
	-- split the pagename into sparate words
	titleWords = splitIntoWords(pn)
	
	nMatches = 0
	myMatches = {}
	foundMonth = false
	
	-- check each words in turn, to see if it matches a month
	for w, thisWord in ipairs(titleWords) do
		-- check agaist each month
		-- if there is a match, then return that monthname
		if thisWord == "tháng" then foundMonth = true
		elseif foundMonth then
			for i, thisMonth in ipairs(monthList) do
				if (thisMonth == thisWord) then
					nMatches = nMatches + 1
					myMatchesnMatches = "tháng " .. thisMonth
				end
			end
			foundMonth = false
		end
	end
	if (nMatches == 0) then
		-- none of the title words matches a whole month
		return nomatch
	end
	
	if ((matchnum >= 1) and (matchnum = 1) then
			return myMatchesmatchnum + nMatches
		end
	end
	
	-- if we get here, we have not found a match at the position specified by "matchnum"
	return nomatch
end
function p.main(frame)
	local args = getArgs(frame)
	return p._main(args)
end
function p._main(args)
	if (args'nomatch' ~= nil) then
		nomatch = args'nomatch'
	end
	
	-- by default, we return the first match
	-- but the optional "C" paarmeter sets the "matchnum" variable, which
	-- * for a positive matchnum "n", returns the nth match if it exists
	-- * for a positive matchnum "n", returns (if it exists) the nth match
	--   counting backwards from the end.
	--   So "match=-1" returns the last match
	--   and "match=-3" returns the 3rd-last match
	if (args'match' ~= nil) then
		matchnum = tonumber(args'match')
		if ((matchnum == nil) or (matchnum == 0)) then
			matchnum = 1
		end
	end
	
	-- by default, we use the current page
	-- but if the "page=" parameters is supplied, we use that
	-- so we try the parameter first
	thispagename = nil
	if ((args'page' ~= nil) and (args'page' ~= "")) then
		-- we have a non-empty "page" parameter, so we use it
		thispagename = args'page'
	else
		-- get the page title
		thispage = mw.title.getCurrentTitle()
		thispagename = thispage.text;
	end
	
	-- now check the pagename to try to find a month ananme
	result = checkPagename(thispagename)
	if (result == "") then
		return nomatch
	end
	return result
end
return p