Editing Module:Sandbox/Takidelfin

-- takidelfin Google Code-in, Introduction to Lua in Wikipedia
-- takidelfin Google Code-in, Working with modules
local p = {}
-- Task 1

function p.hello( frame )
    return "Hello, ''no semicolon'' world!"
end

-- Task 2
p.Hi = function ( frame )
	strName = frame.args.name or "Jimbo"
	return "Hello from Lua module to " .. strName .. ".<br/>"
end

-- Task 3
function p.temperature ( frame )
	cel = tonumber(frame.args.celsius) or 0
	fah = cel * 9 / 5 + 32
	-- return cel .. "°C is " .. fah .. "°F" -- Just testing UTF-8 Character displaying in Lua
	msg = cel .. " degrees Celsius is " .. fah .. " degrees Fahrenheit. "
	if cel > 9 then
		msg = msg .. "It is warm."
		return msg
	end
	return msg .. "It is cold."
end

-- Task 4
function p.times ( frame )
	local num = tonumber( frame.args.num ) or 2
	-- Auto closing br tag avoids errors in HTML
	-- 'Do it in such a way that the heading will always show the number of the times table passed as the parameter.' 
	-- ^ if I understand this properly, I need to display a paramater disregarding of it type.
	local out = num .. " times table<br/>"
	for i = 1,12 do
		out = out .. num .. " times " .. i .. " equals " .. i * num .. "<br/>"
	end
	return out
end

function p.mum ( frame )
	local family = { "Dad", "Mum", "Uncle Stan", "Aunty Elsie", "Brian", "Grandma", "Grandpa", "Jack Sparrow"}
	local msg = ""
	for i = 1,#family do
		msg = msg .. "Hello " .. family[i] .. "<br>"
	end
	return msg
end

-- Task 5
p.sentence = function(frame)
	local str = frame.args.words or ""
	local out = string.upper(string.sub(str, 1, 1)) .. string.sub(str, 2)
	return out
end

p.unpackdate = function(frame)
	local dmydate = frame.args.dmydate or ""
	local day, month, year = string.match(dmydate, "(%d+) (%w+) (%d+)")
	return "Year = " .. year .. "<br>Day = " .. day .. "<br>Month = " .. month
end

-- Task 6
p.langnames = function(frame)
	local langlist = mw.language.fetchLanguageNames()
	local langs = ""
	local count = 0
	for k, v in pairs(langlist) do
		langs = langs .. k .. " - " .. v .. "<br>"
		count = count + 1
	end
	return langs .. "<br>= " .. count .. " languages"
end

p.fallbacks = function(frame)
	local langcode = frame.args.langcode or 'en'
	local fallbacks = mw.language.getFallbacksFor( langcode )
	local fallbackLangs = "Fallback languages for " .. langcode .. "<br/>"
	for key, value in pairs(fallbacks) do
		fallbackLangs = fallbackLangs .. "* " .. value .. "</br>"
	end
	return fallbackLangs .. "<br/> Found " .. #fallbacks .. " fallback languages for " .. langcode .. "<br/>"
end

-- Finds language codes with more than two fallbacks or given argument. I'm too lazy to search for them manually
p.findMoreFallbacks = function(frame)
	local moreThan = tonumber(frame.args.more) or 2
	local langlist = mw.language.fetchLanguageNames()
	local langs = ""
	for k, v in pairs(langlist) do
		local fallbacks = mw.language.getFallbacksFor( k )
		if #fallbacks > moreThan then
			langs = langs .. k .. "<br/>"
		end
	end
	return langs
end

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

p.pageinfo = function(frame)
	local ttl = frame.args.title
	local ttlobj = mw.title.new( ttl )
	
	if ttl == nil then
		return "Page title parameter is mandatory"
	end
	if ttl == "" then
		return "Empty value is not a valid page title"
	end
	if ttlobj == nil then
		return ttl .. " is not a vaild page title"
	end
	
	local msg = ttl .. " "
	
	-- Maybe there is a better way to check existency of the page like using nil checks?
	if ttlobj.exists then
		msg = msg .. "exists and "
	else
		msg = msg .. "does not exist and "
	end
	
	-- Maybe I should use false check for ttlobj.redirectTarget ?
	if ttlobj.isRedirect then
		return msg .. "is a redirect"
	end
	return msg .. "is not a redirect"
end
return p