--Tary123 Google Code-in 2017, Introduction to Lua in Wikipedia
--Lua task #3 - Create your own Lua module on English Wikipedia
local p = {}
function p.hello(frame)
return "Hello, World!"
end
--Lua task #4 - Pass information to your Lua module
p.Hi = function(frame)
strName = frame.args.name or "Jimbo"
return "Hello from Lua to my friend " .. strName .. ".<br>"
end
--Lua task #5 - Perform calculations in Lua
function p.temperature(frame)
cel = frame.args.celsius or 0
fah = cel*9/5+32
msg = cel.." degrees Celsius is "..fah.." degrees Fahrenheit."
if tonumber(cel)>9 then
msg = msg.." It is warm.<br>"
else
msg = msg.." It is cold.<br>"
end
return msg
end
--Lua task #7 - Repeating code
p.times = function(frame)
local num = tonumber( frame.args.num ) or 2
local out = num.." times table<br>"
for i = 1, 12 do
out = out .. num .. " times " .. i .. " equals " .. i * num .. "<br>"
end
return out
end
--Lua task #8 - Tables in Lua
p.mum = function(frame)
local family = {"Dad", "Mum", "Uncle Stan", "Aunty Elsie", "Brian", "Harriet", "Nicole", "Drew"}
local msg = ""
for i = 1, #family do
msg = msg .. "Hello " .. family[i] .. "<br>"
end
return msg
end
--Lua task #9 - Using MediaWiki Libraries
p.langnames = function( frame )
local langs = mw.language.fetchLanguageNames()
local langlist = ""
local count = 0
for key, value in pairs( langs ) do
langlist = langlist .. key .. " - " .. value .. "<br>"
count = count + 1
end
return langlist .. "<br>= " .. count .. " languages"
end
p.pageinfo = function(frame)
local ttl = frame.args.title
local ttlobj = mw.title.new(ttl)
local txt = ttlobj.prefixedText
if ttlobj.exists then
txt = txt.." exists and is "
else
txt = txt.." does not exist and is "
end
if not ttlobj.isRedirect then
txt = txt.."not "
end
txt = txt.."a redirect.<br>"
return txt
end
--Lua task #10 - Update code of the "Reign" template on English Wikipedia
function p.reign(frame)
local label = frame.args.label
local show = frame.args.show or frame.args.link or frame.args.lk
local r = frame.args.cap and "R" or "r"
local wbr = frame.args["wrap"] and "<wbr>​" or ""
local text = ""
if frame.args.sortable then
text = "<span style='display:none; speak:none;'>"
local sortdate = frame.args.sort_date or frame.args.sortdate or
frame.args["sort-date"] or frame.args.single or
frame.args["pre-date"] or frame.args.predate or frame.args.pre_date or
frame.args[1] or frame.args[2] or
frame.args["post-date"] or frame.args.postdate or frame.args.post_date
sortdate = string.format("%04d", sortdate)
text = text..sortdate.."</span>"
end
text = text.."<span style='white-space:nowrap;'>"
if label then text = text..label..""
elseif show == "word" then text = text..r.."eigned"
elseif show == "colon" then text = text..r.."eign:"
elseif show == "lword" then text = text.."[[Reign|"..r.."eigned]]"
elseif show == "lcolon" then text = text.."[[Reign|"..r.."eign]]:"
elseif show == "none" or show == "no" or show == "n" or show == "off" or show == "false" or show == "0" then text = text..r.."."
elseif show == "link" or show == "yes" or show == "y" or show == "on" or show == "true" or show == "1" then text = text.."[[Reign|"..r..".]]"
elseif show == "blank" then
else text = text.."<abbr title='reign'>"..r.."</abbr>."
end
if show ~= "blank" then text = text.." " end
local predate = frame.args["pre-date"] or frame.args.predate or frame.args.pre_date
if predate then
predate = trim(predate)
text = text..predate..", "..wbr
end
local start1 = frame.args[1]
local finish1 = frame.args[2]
if start1 or finish1 then
start1 = start1 or "?"
finish1 = finish1 or ""
start1 = trim(start1)
finish1 = trim(finish1)
if start1 == "" then start1 = "?" end
if string.find(start1, "%s") or string.find(finish1, "%s") then text = text..start1.." – "..finish1
else text = text..start1.."–"..finish1
end
end
local middate = frame.args["mid-date"] or frame.args.middate or frame.args.mid_date
if middate and start1 then
middate = trim(middate)
text = text..", "..wbr..middate
end
local start2 = frame.args[3]
local finish2 = frame.args[4]
if start2 or finish2 then
text = text..", "..wbr
start2 = start2 or "?"
finish2 = finish2 or ""
start2 = trim(start2)
finish2 = trim(finish2)
if start2 == "" then start2 = "?" end
if string.find(start2, "%s") or string.find(finish2, "%s") then text = text..start2.." – "..finish2
else text = text..start2.."–"..finish2
end
end
local postdate = frame.args.single or frame.args["post-date"] or frame.args.postdate or frame.args.post_date
if postdate then
if finish1 or finish2 then text = text..", "..wbr end
postdate = trim(postdate)
text = text..postdate
end
local era = frame.args.era
if era then text = text.." "..era end
text = text.."</span>"
return text
end
function trim(s)
return s:gsub("^%s+", ""):gsub("%s+$", "")
end
--Lua task #11 - Create a general date-handling function
function p.extractdate(frame)
local inputstr = frame.args[1]
local dateformat = frame.args.dateformat or "dmy"
local datestr
-- Check for dates from 0-29 before checking 30 and 31
local dateno = inputstr:match("%D([0-2]?%d)%D") or inputstr:match("^([0-2]?%d)%D") or inputstr:match("%D([0-2]?%d)$") or
inputstr:match("%D(3[01])%D") or inputstr:match("^(3[01])%D") or inputstr:match("%D(3[01])$")
local month
local monthno
-- Date 0 is not possible
if tonumber(dateno) == 0 then dateno = nil end
local monthlist = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"}
local idx = #inputstr
for i,mth in pairs(monthlist) do
local mthabbr = mth:lower():sub(1,3)
-- matches first month found in inputstr, regardless of case
if string.lower(inputstr):match(mthabbr) and string.lower(inputstr):find(mthabbr)<idx then
month = mth
monthno = i
end
idx = string.lower(inputstr):find(mthabbr) or idx
end
-- year gives priority to numbers preceding AD/BC/CE/BCE, followed by 4- or 3-digit numbers,
-- followed by numbers from 32 to 99
local year = inputstr:match("%d+%s-[ABC][DCE]") or inputstr:match("%d?%d%d%d")
or inputstr:match("[4-9]%d") or inputstr:match("3[2-9]")
if not dateno or not month or not monthno or not year then
return "Invalid date"
end
local yearno = year:match("%d+")
local eraformat = frame.args.eraformat or "CE"
if eraformat == "AD" or eraformat == "BC" then
year = year:gsub("CE", "AD") -- "BCE" is never parsed by year
elseif eraformat == "CE" or eraformat == "BCE" then
year = year:gsub("AD", "CE"):gsub("BC", "BCE")
else
return "Invalid era format"
end
if dateformat == "dmy" then
datestr = dateno.." "..month.." "..year
elseif dateformat == "mdy" then
datestr = month.." "..dateno..", "..year
elseif dateformat == "iso" then
datestr = string.format("%04d", yearno).."-"..string.format("%02d", monthno).."-"..string.format("%02d", dateno)
elseif dateformat == "y" then
datestr = yearno
else
return "Invalid date format"
end
return datestr
end
return p
