Module:Section link
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This module is rated as ready for general use. It has reached a mature form and is thought to be bug-free and ready for use wherever appropriate. It is ready to mention on help pages and other resources as an option for new users to learn. To reduce server load and bad output, it should be improved by sandbox testing rather than repeated trial-and-error editing. |
Uses Lua: |
Implements {{Section link}}.
Usage
{{#invoke:Section link|main|page_name|section_name|...}}
-- This module implements {{section link}}.
local checkType = require('libraryUtil').checkType
local yesno = require('Module:Yesno')
local p = {}
local function makeSectionLink(page, section, display)
display = display or section
page = page or ''
return string.format('[[%s#%s|%s]]', page, section, display)
end
function p._main(page, sections, options, title)
-- Validate input.
checkType('_main', 1, page, 'string', true)
checkType('_main', 3, options, 'table', true)
if sections == nil then
sections = {}
elseif type(sections) == 'string' then
sections = {sections}
elseif type(sections) ~= 'table' then
error(string.format(
"type error in argument #2 to '_main' " ..
"(string, table or nil expected, got %s)",
type(sections)
), 2)
end
options = options or {}
title = title or mw.title.getCurrentTitle()
-- Deal with blank page names elegantly
if page and not page:find('%S') then
page = nil
options.nopage = true
end
-- Make the link(s).
local isShowingPage = not yesno(options.nopage)
if #sections <= 1 then
local linkPage = page or ''
local section = sections[1] or 'Notes'
local display = '§ ' .. section
if isShowingPage then
page = page or title.prefixedText
display = page .. ' ' .. display
end
return makeSectionLink(linkPage, section, display)
else
-- Multiple sections. First, make a list of the links to display.
local ret = {}
for i, section in ipairs(sections) do
ret[i] = makeSectionLink(page, section)
end
-- Assemble the list of links into a string with mw.text.listToText.
-- We use the default separator for mw.text.listToText, but a custom
-- conjunction. There is also a special case conjunction if we only
-- have two links.
local conjunction
if #sections == 2 then
conjunction = '​ and '
else
conjunction = ', and '
end
ret = mw.text.listToText(ret, nil, conjunction)
-- Add the intro text.
local intro = '§§ '
if isShowingPage then
intro = (page or title.prefixedText) .. ' ' .. intro
end
ret = intro .. ret
return ret
end
end
function p.main(frame)
local args = require('Module:Arguments').getArgs(frame, {
wrappers = 'Template:Section link',
valueFunc = function (key, value)
value = value:match('^%s*(.-)%s*$') -- Trim whitespace
-- Allow blank first parameters, as the wikitext template does this.
if value ~= '' or key == 1 then
return value
end
end
})
-- Sort the arguments.
local page
local sections, options = {}, {}
for k, v in pairs(args) do
if k == 1 then
-- Doing this in the loop because of a bug in [[Module:Arguments]]
-- when using pairs with deleted arguments.
page = v
elseif type(k) == 'number' then
sections[k] = v
else
options[k] = v
end
end
-- Compress the sections array.
local function compressArray(t)
local nums, ret = {}, {}
for num in pairs(t) do
nums[#nums + 1] = num
end
table.sort(nums)
for i, num in ipairs(nums) do
ret[i] = t[num]
end
return ret
end
sections = compressArray(sections)
return p._main(page, sections, options)
end
return p