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-- This module implements {{portal bar}}.

local p = {}

local htmlBuilder = require( 'Module:HtmlBuilder' )
local buildNavbox = require( 'Module:Navbox' )._navbox
local getImageName = require( 'Module:Portal' ).image
local yesno = require( 'Module:Yesno' )

-- Builds the portal bar used by {{portal bar}}.
function p._main( portals, args )
if #portals < 1 then return '' end -- Don't display a blank navbox if no portals were specified.
local list = htmlBuilder.create( 'ul' )
for i, portal in ipairs( portals ) do
list
.tag( 'li' )
.css( 'display', 'inline' )
.css( 'white-space', 'nowrap' )
.tag( 'span' )
.css( 'margin', 'auto 0.5em' )
.wikitext( mw.ustring.format( '[[File:%s|24x21px]]', getImageName{ portal } ) )
.done()
.tag( 'span' )
.css( 'font-weight', 'bold' )
.wikitext( mw.ustring.format( '[[Portal:%s|%s portal]]', portal, portal ) )
end
if yesno( args.border ) == false then -- Don't display a border if args.border is "no", "n", "false", 0 or false.
local root = htmlBuilder.create( 'div' )
root
.addClass( 'noprint' )
.css( 'width', '100%' )
.css( 'text-align', 'center' )
.css( 'padding', '1px' )
.css( 'font-size', '88%' )
.wikitext( tostring( list ) )
return tostring( root )
else
return buildNavbox{
name = 'Portal bar',
bodyclass = 'noprint',
list1 = tostring( list )
}
end
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 frame == mw.getCurrentFrame() 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 {{portal|2=Politics}}. 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

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