# Module:TimeAgo

-- Replacement for Template:Time ago
local numberSpell = require('Module:NumberSpell')._main
local yesno = require('Module:Yesno')  
local p = {}  
-- Table to convert entered text values to numeric values.
timeText = {
['seconds'] = 1,
['minutes'] = 60,
['hours'] = 3600,
['days'] = 86400,
['weeks'] = 604800,
['months'] = 2678400,
['years'] = 31557600
}  
-- Table containing tables of possible units to use in output.
timeUnits = {
[1] = { 'நொடி', 'நொடிகள்', "நொடி'கள்", "நொடிகள்'" },
[60] = { 'நிமிடம்', 'நிமிடங்கள்', "நிமிடங்கள்'", "நிமிடங்கள்'" },
[3600] = { 'மணித்தியாலம்', 'மணித்தியாலங்கள்', "மணித்தியாலங்கள்", "மணித்தியாலங்கள்'" },
[86400] = { 'நாள்', 'நாட்கள்', "நாட்கள்", "நாட்கள்'" },
[604800] = { 'வாரம்', 'வாரங்கள்', "வாரங்கள்", "வாரங்கள்'" },
[2678400] = { 'மாதம்', 'மாதங்கள்', "மாதங்கள்", "மாதங்கள்'" },
[31557600] = { 'ஆண்டு', 'ஆண்டுகள்', "ஆண்டுகள்", "ஆண்டுகள்'" }
}  
function p._main( args )
-- Initialize variables
local lang = mw.language.getContentLanguage
local auto_magnitude_num
local min_magnitude_num
local result
local result_unit
local magnitude = args.magnitude
local min_magnitude = args.min_magnitude
local purge = args.purge
local spell_out = args.spellout
local spell_out_max = args.spelloutmax  
-- Add a purge link if something (usually "yes") is entered into the purge parameter
if purge then
purge = ' <span>([' .. mw.title.getCurrentTitle:fullUrl('action=purge') .. ' purge])</span>'
else
purge = ''
end  
-- Check that the entered timestamp is valid. If it isn't, then give an error message.
local noError, inputTime = pcall( lang.formatDate, lang, 'U', args[1], true )
if not noError then
return '<strong>Error: first parameter cannot be parsed as a date or time.</strong>'
end  
-- Store the difference between the current time and the inputted time, as well as its absolute value.
local timeDiff = lang:formatDate( 'U', nil, true ) - inputTime
local absTimeDiff = math.abs( timeDiff )  
if magnitude then
auto_magnitude_num = 0
min_magnitude_num = timeText[magnitude]
else
-- Calculate the appropriate unit of time if it was not specified as an argument.
local autoMagnitudeData = {
{ denom = 63115200, amn = 31557600 },
{ denom = 5356800, amn = 2678400 },
{ denom = 172800, amn = 86400 },
{ denom = 7200, amn = 3600 },
{ denom = 120, amn = 60 }
}
for i, t in ipairs( autoMagnitudeData ) do
if absTimeDiff / t.denom >= 1 then
auto_magnitude_num = t.amn
break
end
end
auto_magnitude_num = auto_magnitude_num or 1
if min_magnitude then
min_magnitude_num = timeText[min_magnitude]
else
min_magnitude_num = -1
end
end  
if not min_magnitude_num then
-- Default to seconds if an invalid magnitude is entered.
min_magnitude_num = 1
end  
local magnitude_num = math.max( min_magnitude_num, auto_magnitude_num )
local result_num = math.floor ( absTimeDiff / magnitude_num )  
local punctuation_key, suffix
if timeDiff >= 0 then -- Past
if result_num == 1 then
punctuation_key = 1
else
punctuation_key = 2
end
if args.ago == '' then
suffix = ''
else
suffix = ' ' .. (args.ago or 'முன்னர்')
end
else -- Future
if args.ago == '' then
suffix = ''
if result_num == 1 then
punctuation_key = 1
else
punctuation_key = 2
end
else
suffix = ' time'
if result_num == 1 then
punctuation_key = 3
else
punctuation_key = 4
end
end
end
result_unit = timeUnits[ magnitude_num ][ punctuation_key ]  
-- Convert numerals to words if appropriate.
spell_out_max = tonumber( spell_out_max ) -- Would cause script errors if not a number.
local result_num_text
if ( spell_out == 'auto' and 1 <= result_num and result_num <= 9 and result_num <= ( spell_out_max or 9 ) )
or ( yesno( spell_out ) and 1 <= result_num and result_num <= 100 and result_num <= ( spell_out_max or 100 ) )
then
result_num_text = numberSpell( result_num )
else
result_num_text = tostring( result_num )
end  
result = result_num_text .. ' ' .. result_unit .. suffix -- Spaces for suffix have been added in earlier.
return result .. purge
end  
function p.main
local args = require( 'Module:Arguments' ).getArgs( , {
valueFunc = function( k, v )
if v then
v = v:match( '^%s*(.-)%s*$' ) -- Trim whitespace.
if k == 'ago' or v ~= '' then
return v
end
end
return nil
end,
wrappers = 'Template:Time ago'
})
return p._main( args )
end  
return p