Editing Module:Sandbox/Melvintong1516

--Melvintong1516 - Google Code-in 2019, Introduction to Lua in Wikipedia
--Lua Task 2 - Working with modules
local p = {}

function p.hello( frame )
	return "Hello, world!"
end

p.Hi = function(frame)
	strName = frame.args.name or "Jimmy"
	return "Hello from Lua to my friend " .. strName .. ".<br>"
end

p.converttemp = function(frame)
	cels = tonumber(frame.args.celsius) or 0
	fahr = (cels*9)/5+32
	if cels>9 then msg = "It is warm." else msg="It is cold." end
	msg = msg .. " " .. cels .. " degrees Celsius is " .. fahr .. " degrees Fahrenheit"
	return msg
end

--Task 4
function p.timestable(frame)
	local numb = tonumber( frame.args.numb ) or 2
	local out = numb .. " Times Table<br>"
	for i = 1, 12 do
		out = out .. numb .. " times " .. i .. " equals " .. i * numb .. "<br>"
	end
	return out
end

function p.people(frame)
	local friends = {"Agnetha", "Betty", "Carlos", "Davinder", "Eloise", "Fiona", "George", "Hugo"}
	local msg = ""
	for l = 1, #friends do
		msg = msg .. "Hello " .. friends[l] .. "<br>"
	end
	return msg
end

function p.sent(frame)
	local txt = frame.args.text or ""
	local out = string.sub(string.upper(txt, 1), 1, 1)  .. string.sub(txt, 2)
	return out
end

function p.unpack(frame)
	local dmy = frame.args.dmydate or ""
	local d, m, y = string.match(dmy, "(%d+) (%w+) (%d+)")
	return "Year = " .. y .. "<br>Day = " .. d .. "<br>Month = " .. m
end

function p.langs(frame)
	local langslist = mw.language.fetchLanguageNames()
	local out = ""
	local count = 0
	for k, v in pairs(langslist) do
		out = out .. k .. " - " .. v .. "<br>"
		count = count + 1
	end
	return out .. "<br>= " .. count .. " languages"
end

function p.fallbacklangs(frame)
	local langcode = frame.args.langcode
	local msg = ""
	local fallback = mw.language.getFallbacksFor( langcode )
	for l = 1, #fallback do
		msg = langcode.. msg .. l .. ". " .. fallback[l] .. "<br>"
	end
	return msg
end

p.pgtitle = function( frame )
	local title = frame.args.title
	local ttlobj = mw.title.new( title )
	local txt = ttlobj.text
	return txt
end

p.pginfo = function( frame )
	local title = frame.args.title
	local ttlobj = mw.title.new(title)
	local msg1 = ""
	local msg2 = ""
	if ttlobj == nil then
		error_msg = "The value input is invalid"
		return error_msg 
	else
		local exists = ttlobj.exists
		local redirect = ttlobj.isRedirect
		if exists == true then
			msg1 = " exist " 
			else
			msg1 = " does not exist "
		end
		if redirect == true then
			msg2 = " is a redirect " 
		else
			msg2 = " is not a redirect "
		end
		local txt = ttlobj.text
		local msg = txt .. msg1 .. " and " .. msg2
		return msg 
	end
end

-- Get date
p.getdate = function(frame)
	local qid = frame.args.qid
	local prop = frame.args.prop
	local valtbl = mw.wikibase.getBestStatements(qid, prop)
	local dmy = string.sub(valtbl[1].mainsnak.datavalue.value.time, 2, 11)
	return dmy
end

p.getfulldate = function(frame)
	local qid = frame.args.qid
	local prop = frame.args.prop
	local monthname = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }
	local valtbl = mw.wikibase.getBestStatements(qid, prop)
	local dmyinfo = string.sub(valtbl[1].mainsnak.datavalue.value.time, 2, 11)

	local y, m, d = string.match(dmyinfo, "(%d+)-(%d+)-(%d+)")
    local month = monthname[tonumber(m)]
	return d .. " " .. month .. " " .. y
end

p.getitem = function(frame)
	local qid = frame.args.qid
	local prop = frame.args.prop
	local valtbl = mw.wikibase.getBestStatements(qid, prop)
	local id = valtbl[1].mainsnak.datavalue.value.id
	local idw = mw.wikibase.getLabel(id)
	return idw
end

return p