模块:Portal
此模块的文档可以在模块:Portal/doc创建
--[==[ This module is a Lua implementation of the old {{Portal}} template. As of August 2013 it is used on nearly 5,000,000 articles.
-- Please take care when updating it! It outputs two functions: p.portal, which generates a list of portals, and p.image, which
-- produces the image name for an individual portal.
-- The portal image data is kept in submodules of [[Module:Portal/images]], listed below:
-- [[Module:Portal/images/letter]]
-- [[Module:Portal/images/chinese]]
-- [[Module:Portal/images/other]] - for portal names beginning with any other letters. This includes numbers,
-- letters with diacritics, and letters in non-Latin alphabets.
-- [[Module:Portal/images/aliases]] - for adding aliases for existing portal names. Use this page for variations
-- in spelling and diacritics, etc., no matter what letter the portal begins with.
--
-- The images data pages are separated by the first letter to reduce server load when images are added, changed, or removed.
-- Previously all the images were on one data page at [[Module:Portal/images]], but this had the disadvantage that all
-- 5,000,000 pages using this module needed to be refreshed every time an image was added or removed.
]==]
local p = {}
local function matchImagePage(s)
-- Finds the appropriate image subpage given a lower-case
-- portal name plus the first letter of that portal name.
if type(s) ~= 'string' or #s < 1 then return end
local firstLetter = mw.ustring.sub(s, 1, 1)
local imagePage
if mw.ustring.find(firstLetter, '^[a-z]') then
imagePage = 'Module:Portal/images/letter'
else
imagePage = 'Module:Portal/images/chinese'
end
-- Hey, we have a thing called "other"
return mw.loadData(imagePage)[s] or
mw.loadData('Module:Portal/images/other')[s]
end
local function getAlias(s)
-- Gets an alias from the image alias data page.
local aliasData = mw.loadData('Module:Portal/images/aliases')
return aliasData[s]
end
local function getImageName(s)
-- Gets the image name and the un-aliased "normal name" for a given portal.
local default = 'Portal-puzzle.svg|link=|alt='
if type(s) ~= 'string' or #s < 1 then
return default
end
local sl = mw.ustring.lower(s)
local sr = s
local img = matchImagePage(sl)
if not img then
sr = getAlias(sl)
if sr then
img = matchImagePage(mw.ustring.lower(sr))
end
if not img then
img = default
sr = s
end
end
return img, sr
end
function p._portal(portals, args)
-- This function builds the portal box used by the {{portal}} template.
local root = mw.html.create('div')
:attr('role', 'navigation')
:attr('aria-label', 'Portals')
:addClass('noprint portal plainlist')
:addClass(args.left and 'tleft' or 'tright')
:css('margin', args.margin or (args.left == 'yes' and '0.5em 1em 0.5em 0') or '0.5em 0 0.5em 1em')
:css('border', 'solid #aaa 1px')
:newline()
-- If no portals have been specified, display an error and add the page to a tracking category.
if not portals[1] then
-- zhwp compat: name={{{1}}}|image={{{image1}}}
-- no tracking needed as no expensive involved
if args['name'] ~= nil then
portals[1] = args['name']
args['image1'] = args['image']
else
root:wikitext('<strong class="error">未指定主题：请至少添加一个主题</strong>[[Category:Portal模版没有使用参数]]')
return tostring(root)
end
end
-- Start the list. This corresponds to the start of the wikitext table in the old [[Template:Portal]].
local listroot = root:tag('ul')
:css('display', 'table')
:css('box-sizing', 'border-box')
:css('padding', '0.1em')
:css('max-width', '175px')
:css('width', type(args.boxsize) == 'string' and (args.boxsize .. 'px') or nil)
:css('background', '#f9f9f9')
:css('font-size', '85%')
:css('line-height', '110%')
:css('font-weight', 'bold')
-- zhwp compatibility: check for |2= as |image1
local compat_image1 = false
if #portals == 2 and (args['image1'] == nil) then
local file = portals[2]
local parts = mw.text.split(file, '%.')
if #parts > 1 then
local ext = (parts[#parts]):lower()
-- likely
if #ext == 3 or #ext == 4 then
local assume_img = (ext == 'png') or (ext == 'jpg') or (ext == 'svg')
-- expensive, hence pre-checks & assumption
if assume_img or mw.title.new(file, 'Media').exists then
args['image1'] = portals[2]
compat_image1 = true
table.remove(portals, 2)
end
end
end
end
-- Display the portals specified in the positional arguments.
for i, portal in ipairs(portals) do
-- Support |image1= |image2= ...
-- Rationale: [[Template:WPBannerMeta]] usage.
local image = ''
if args['image' .. tostring(i)] ~= nil then
image = args['image' .. tostring(i)] .. '|alt=' .. portal
else
-- get the alias too
image, portal = getImageName(portal)
end
-- Generate the html for the image and the portal name.
listroot
:newline()
:tag('li')
:css('display', 'table-row')
:tag('span')
:css('display', 'table-cell')
:css('padding', '0.2em')
:css('vertical-align', 'middle')
:css('text-align', 'center')
:wikitext(string.format('[[File:%s|32x28px|class=noviewer]]', image))
:done()
:tag('span')
:css('display', 'table-cell')
:css('padding', '0.2em 0.2em 0.2em 0.3em')
:css('vertical-align', 'middle')
:wikitext(string.format('[[Portal:%s|%s主题]]', portal, portal))
end
local ret = tostring(root)
if compat_image1 == true then
ret = ret .. '[[Category:使用2號參數傳遞Portal模板圖像的頁面]]'
end
return ret
end
function p._image(portals)
-- Wrapper function to allow getImageName() to be accessed through #invoke.
local name = getImageName(portals[1])
return name:match('^(.-)|') or name -- FIXME: use a more elegant way to separate borders etc. from the image name
end
local function getAllImageTables()
-- Returns an array containing all image subpages (minus aliases) as loaded by mw.loadData.
local images = {}
for i, subpage in ipairs{'letter', 'chinese', 'other'} do
images[i] = mw.loadData('Module:Portal/images/' .. subpage)
end
return images
end
function p._displayAll(portals, args)
-- This function displays all portals that have portal images. This function is for maintenance purposes and should not be used in
-- articles, for two reasons: 1) there are over 1500 portals with portal images, and 2) the module doesn't record how the portal
-- names are capitalized, so the portal links may be broken.
local lang = mw.language.getContentLanguage()
local count = 1
for _, imageTable in ipairs(getAllImageTables()) do
for portal in pairs(imageTable) do
portals[count] = lang:ucfirst(portal)
count = count + 1
end
end
return p._portal(portals, args)
end
function p._imageDupes()
-- This function searches the image subpages to find duplicate images. If duplicate images exist, it is not necessarily a bad thing,
-- as different portals might just happen to choose the same image. However, this function is helpful in identifying images that
-- should be moved to a portal alias for ease of maintenance.
local exists, dupes = {}, {}
for _, imageTable in ipairs(getAllImageTables()) do
for portal, image in pairs(imageTable) do
if not exists[image] then
exists[image] = portal
else
table.insert(dupes, string.format('The image "[[:File:%s|%s]]" is used for both portals "%s" and "%s".', image, image, exists[image], portal))
end
end
end
if #dupes < 1 then
return 'No duplicate images found.'
else
return 'The following duplicate images were found:\n* ' .. table.concat(dupes, '\n* ')
end
end
local function processPortalArgs(args)
-- This function processes a table of arguments and returns two tables: an array of portal names for processing by ipairs, and a table of
-- the named arguments that specify style options, etc. 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.
args = type(args) == 'table' and args or {}
local portals = {}
local namedArgs = {}
for k, v in pairs(args) do
if type(k) == 'number' and type(v) == 'string' then -- Make sure we have no non-string portal names.
table.insert(portals, k)
elseif type(k) ~= 'number' then
namedArgs[k] = v
end
end
table.sort(portals)
for i, v in ipairs(portals) do
portals[i] = args[v]
end
return portals, namedArgs
end
local function makeWrapper(funcName)
-- Processes external arguments and sends them to the other functions.
return function (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
-- Trim whitespace and remove blank arguments.
local args = {}
for k, v in pairs(origArgs) do
if type(v) == 'string' then
v = mw.text.trim(v)
end
if v ~= '' then
args[k] = v
end
end
return p[funcName](processPortalArgs(args)) -- passes two tables to func: an array of portal names, and a table of named arguments.
end
end
for _, funcName in ipairs{'portal', 'image', 'imageDupes', 'displayAll'} do
p[funcName] = makeWrapper('_' .. funcName)
end
return p