Module:Sandbox/Matt Fitzpatrick/Portal bar explained

-- This module implements .

require('strict')

local p =

local getImageName = require('Module:Portal').imagelocal yesno = require('Module:Yesno')

-- Builds the portal bar used by .function p._main(portals, args) if #portals < 1 then return end -- Don't display a blank navbox if no portals were specified. local list = mw.html.create('ul') :addClass('noprint metadata') :css('width', '100%') :css('text-align', 'center') :css('padding', '1px') :css('font-size', '88%') :css('font-weight', 'bold') if yesno(args.border)

false then list :css('padding', '1px') else list :css('margin', '1em 0 0') :css('border', '1px solid #aaa') :css('padding', '4px') end for _, portal in ipairs(portals) do list :tag('li') :css('display', 'inline') :css('white-space', 'nowrap') :tag('span') :css('margin', 'auto 0.5em') :wikitext(string.format('', getImageName)) :done :wikitext(string.format('%s portal', portal, portal)) end return tostring(list)end

-- Processes external arguments and sends them to the other functions.function p.main(frame) -- If called via #invoke, use the args passed into the invoking -- template, or the args passed to #invoke if any exist. Otherwise -- assume args are being passed directly in from the debug console -- or from another Lua module. local origArgs if type(frame.getParent)

'function' then origArgs = frame:getParent.args for k, v in pairs(frame.args) do origArgs = frame.args break end else origArgs = frame end -- Process the args to make an array of portal names that can be used with ipairs. We need to use ipairs because we want to list -- all the portals in the order they were passed to the template, but we also want to be able to deal with positional arguments -- passed explicitly, for example . The behaviour of ipairs is undefined if nil values are present, so we -- need to make sure they are all removed. local portals, args =, for k, v in pairs(origArgs) do if type(k)

'number' and type(v)

'string' then -- Make sure we have no non-string portal names. if mw.ustring.find(v, '%S') then -- Remove blank values. table.insert(portals, k) end elseif type(k) ~= 'number' then -- Separate named arguments from portals. if type(v)

'string' then v = mw.text.trim(v) end args[k ] = v end end table.sort(portals) for i, v in ipairs(portals) do portals[i ] = mw.text.trim(origArgs[v ]) -- Swap keys with values, trimming whitespace. end return p._main(portals, args)end

return p