Module:Yesno

    From Nonbinary Wiki
    Revision as of 08:35, 23 March 2013 by m>Mr. Stradivarius (get arguments from the parent frame if the current frame doesn't have any)

    Documentation for this module may be created at Module:Yesno/doc

    local p = {}
     
    function p.yesno(frame)
     
        -- defaults
        local retvals = {
            yes   = "yes",
            no    = "",
            ["¬"] = ""
        }
     
        -- Allow arguments to override defaults.
        -- 'any' tracks the presence of any arguments at all.
        local args = frame.args
        local any = false
        for k,v in pairs(args) do
            any = true
            retvals[k] = v
        end
        -- If there are no arguments, try and get them from the parent frame.
        if any == false then
            local pframe = frame:getParent()
            args = pframe.args
            for k,v in pairs(args) do
                any = true
                retvals[k] = v
            end
        end    
     
        val = args[1]
     
        -- According to the template docs, the input should be considered nil
        -- only when no params were provided. If any params at all were present,
        -- the value must be considered blank. A bit weird, if you ask me.
        if (val == nil and not any) or val == '¬' then
            return retvals['¬']
        end
     
        val = (val or ''):lower()          -- Coerce to blank if nil; make lowercase.
        val = val:match'^%s*(.*%S)' or ''  -- Trim whitespace.
     
        if val == '' then
            return retvals['blank'] ~= nil and retvals['blank'] or retvals['no']
        elseif val == 'n' or val == 'no'  or val == '0' then
            return retvals['no']
        elseif val == 'y' or val == 'yes' or val == '1' or retvals['def'] == nil then
            return retvals['yes']
        else
            return retvals['def']
        end
    end
     
    return p