Module:ChangePerDay

Module documentation

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Module:ChangePerDay requires Module:Number.

Module:ChangePerDay is required by Module:Exchange.

---

-- <nowiki>
--
-- Implements {{ChangePerDay}}
--

local p = {}
local round = require( 'Module:Number' )._round

function p._change( args )
    local lang = mw.language.getContentLanguage()

    local price = tonumber( args[1] ) or 1
    local last = tonumber( args[2] ) or 1
    local date = args[3] or 'January 1'
    local lastDate = args[4] or 'July 1'

    local diff = lang:formatDate( 'U', date ) - lang:formatDate( 'U', lastDate )
    local ret

    diff = diff / 86400 -- diff / no. secs in a day

    if diff < 1 then
        ret = price / last - 1
    else
        ret = ( price / last - 1 ) / math.ceil( diff )
    end

    return round( ret, 3 )

end

return p