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--[[
{{Helper module
|name = Currency
|fname1 = _amount(a, coinType)
|ftype1 = number/string, string
|fuse1 = Returns the number a with the correct image in front of it and formatted with commas.  Current supported cointypes are <code>moedas</code>, <code>enferrujadas</code> and <code>sinos</code>.
}}
-- ]]
-- <pre>
-- Implements various currency templates
--
 
local p = {}
 
local function amount (a, coinType)
    -- convert used globals to locals where possible to improve performance
    local math = math
    local string = string
    local table = table
    local mw = mw
    local expr = mw.ext.ParserFunctions.expr
 
    local ret = {'<span class="coins ', true, true, true, true, '</span>'}
    -- add class for CSS to add the correct image with
    -- see [[MediaWiki:Custom-Common.less/moedas.less]] for more details
    local coinClasses = {
        moedas = 'coins-',
        enferrujadas = 'rusty-coins-',
        sinos = 'chimes-'
    }
    local a2, num, amounts, i, j
 
    ret[1] = '<span class="coins '
    ret[2] = coinClasses[coinType]
 
    -- strip commas from input
    -- @example {{GEPrice|Foo}} -> '1,000'
    a = string.gsub(a, '.', '').gsub(a, ',', '')
 
    -- cache tonumber result
    a2 = tonumber(a)
 
    -- only do this if required so as not to impact performance too much
    if a2 == nil then
        a = expr(a)
        a2 = tonumber(a) or 0
    end
 
    -- round to 2 d.p.
    a = math.floor(a2 * 100 + 0.5) / 100
 
    -- select which image class to use for css to hook off
    num = math.abs(a)
    amounts = {10000, 1000, 250, 100, 25, 5, 4, 3, 2, 1}
    amountssinos = {1000, 100, 50, 20, 1}
 
    if coinType == 'sinos' then
        amts = amountssinos
    else
        amts = amounts
    end
 
    for i = 1, #amts do
        j = amts[i]
 
        if num >= j then
            break
        end
    end
 
    ret[3] = tostring(j)
 
    -- set a class to denote positive or negative (css sets the colour)
    if a > 0 then
        ret[4] = ' coins-pos">'
    elseif a < 0 then
        ret[4] = ' coins-neg">'
    else
        ret[4] = '">'
    end
 
    -- format number with commas
    ret[5] = mw.language.getContentLanguage():formatNum(a)
 
    return table.concat( ret )
end
 
--
-- {{moedas}}
--
function p.moedas(frame)
    local args = frame:getParent().args
    -- for {{moedas|111}} or {{moedas|amount=111}}
    -- @todo remove named arg
    local a = args[1] or args.Quantidade or args.quantidade or args.Amount or args.amount or '0'
    return amount(a, 'moedas')
end
 
--
-- {{enferrujadas moedas}}
--
function p.enferrujadas(frame)
    local args = frame:getParent().args
    -- @todo remove named arg
    local a = args[1] or args.Quantidade or args.quantidade or args.Amount or args.amount or '0'
    return amount(a, 'enferrujadas')
end
 
--
-- {{sinos}}
--
function p.sinos(frame)
    local args = frame:getParent().args
    -- @todo remove named arg
    local a = args[1] or args.Quantidade or args.quantidade or args.Amount or args.amount or '0'
    return amount(a, 'sinos')
end
 
--
-- Module access point
--
function p._amount(a, coinType)
    a = tostring(a) or '0'
    return amount(a, coinType)
end
 
return p
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