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2018-11-06T09:06:46Z

1 revision imported

Evad37: preprocess parser functions

2018-10-05T02:45:06Z

preprocess parser functions

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local p = {}
local excerptModule = require('Module:Excerpt')
local slideshowModule = require('Module:Random slideshow')
local randomModule = require('Module:Random')

function cleanupArgs(argsTable)
local cleanArgs = {}
for key, val in pairs(argsTable) do
if type(val) == 'string' then
val = val:match('^%s*(.-)%s*$')
if val ~= '' then
cleanArgs[key] = val
end
else
cleanArgs[key] = val
end
end
return cleanArgs
end

--[[
@param {String} wikitext: Wikitext of just the list (i.e. each line is a list item)
@param {String} symbol: Special character used in the wikitext markup for the list, e.g. '*' or '#'
@param {String} outerTag: Text portion of the tag for each list or sublist, e.g. 'ul' or 'ol'
@param {String} innerTag: Text portion of the tag for each list item, e.g. 'li'
]]
local wikitextToHtmlList = function(wikitext, symbol, outerTag, innerTag)
local listParts = {}
for level, item in mw.ustring.gmatch('\n'..wikitext..'\n', '\n(%'..symbol..'+)(.-)%f[\n]') do
table.insert(listParts, {level=level, item=item})
end
table.insert(listParts, {level='', item=''})

local htmlList = {}
for i, this in ipairs( listParts ) do
local isFirstItem = (i == 1)
local isLastItem = (i == #listParts)
local lastLevel = isFirstItem and '' or listParts[i-1]['level']
local tags
if #lastLevel == #this.level then
tags = '</'..innerTag..'><'..innerTag..'>'
elseif #this.level > #lastLevel then
tags = string.rep('<'..outerTag..'><'..innerTag..'>', #this.level - #lastLevel)
elseif isLastItem then
tags = string.rep('</'..innerTag..'></'..outerTag..'>', #lastLevel)
else -- ( #this.level < #lastLevel ) and not last item
tags = string.rep('</'..innerTag..'></'..outerTag..'>', #lastLevel - #this.level ) .. '</'..innerTag..'><'..innerTag..'>'
end
table.insert(htmlList, tags .. this.item)
end
return table.concat(htmlList)
end

--[[
@param {String} wikitext: Wikitext excertp containg zero or more lists
@param {String} symbol: Special character used in the wikitext markup for the list, e.g. '*' or '#'
@param {String} outerTag: Text portion of the tag for each list or sublist, e.g. 'ul' or 'ol'
@param {String} innerTag: Text portion of the tag for each list item, e.g. 'li'
]]
local gsubWikitextLists = function(wikitext, symbol, outerTag, innerTag)
-- temporarily remove list linebreaks...
wikitext = mw.ustring.gsub(wikitext..'\n', '\n%'..symbol, '¿¿¿'..symbol)
-- ...so we can grab the whole list (and just the list)...
return mw.ustring.gsub(
wikitext,
'¿¿¿%'..symbol..'[^\n]+',
function(listWikitext)
-- ...and then reinstate linebreaks...
listWikitext = mw.ustring.gsub(listWikitext, '¿¿¿%'..symbol, '\n'..symbol)
-- ...and finally do the conversion
return wikitextToHtmlList(listWikitext, symbol, outerTag, innerTag)
end
)
end

local replacePipesWithMagicword = function(t)
return mw.ustring.gsub(t, '|', '{{!}}')
end

--[[ help gsub strip tables and templates that aren't part of the prose,
and remove linebreaks from within other templates,
and preprocess parser functions ]]
local processBraces = function(t)
local isTable = mw.ustring.sub(mw.text.trim(t), 2, 2) == '|'
if isTable then
return ''
end
-- else it's a template or parser function
local first = mw.ustring.sub(t, 1, 1)
local last = mw.ustring.sub(t, -1)
local isNotPartOfProse = first == '\n' and last == '\n'
if isNotPartOfProse then
return ''
end
local isParserFunction = mw.ustring.sub(mw.text.trim(t), 3, 3) == '#'
if isParserFunction then
local frame = mw.getCurrentFrame()
return frame:preprocess(t)
end
-- else replace pipes and remove internal linebreaks
return replacePipesWithMagicword(mw.ustring.gsub(t, '\n*', ''))
end

local makeGalleryArgs = function(titles, options, limit)
options.nostubs = true
local galleryArgs = {}
local titlesSequence = {}
local i = 1
while titles[i] do
titlesSequence[i] = titles[i]
i = i + 1
end
local randomTitles = randomModule.main('array', {t=titlesSequence, limit=limit})
for _, title in pairs(randomTitles) do
local excerpt = mw.text.trim(excerptModule.main({title}, options))
if excerpt and excerpt ~= '' and #excerpt > 10 then
-- temporarily take off the '''[[Page title|Read more...]]''' link if present
readmore_start_index, readmore_end_index, readmore_text = mw.ustring.find(excerpt, "('''%b[]''')$", -350) --- Starting from end should improve efficiency. 350 characters allows for long page titles and/or a long custom label for the link
if readmore_start_index then
excerpt = mw.ustring.sub(excerpt, 1, readmore_start_index-2)
end
-- strip galleries
excerpt = mw.ustring.gsub(excerpt, "<%s*[Gg]allery.->.-<%s*/%s*[Gg]allery%s*>", "")
-- strip tables and block templates; strip newlines and replace pipes within inline templates
excerpt = mw.ustring.gsub(excerpt..'\n', '\n?%b{}\n?', processBraces)
-- replace pipes within links
excerpt = mw.ustring.gsub(excerpt, '%b[]', replacePipesWithMagicword)
-- replace other pipes with html entity
excerpt = mw.ustring.gsub(excerpt, '|', '|')
-- replace wikitext bulleted lists with html bulleted lists
excerpt = gsubWikitextLists(excerpt, '*', 'ul', 'li')
-- replace wikitext numbered lists with html numbered lists
excerpt = gsubWikitextLists(excerpt, '#', 'ol', 'li')
excerpt = mw.text.trim(excerpt)
-- add back the "Read more..." link if it was present
if readmore_text then
excerpt = excerpt .. " " .. readmore_text
end
local text = '<div style{{=}}text-align:left;>' .. mw.ustring.gsub(excerpt, '%c', '<br>') .. '</div>'
table.insert(galleryArgs, 'File:Blank.png')
table.insert(galleryArgs, text)
end
end
return galleryArgs
end

local makeOptions = function(args)
local options = args -- pick up miscellaneous options: more, errors, fileargs
options.paraflags = excerptModule.numberflags(args.paragraphs or "") -- parse paragraphs, e.g. "1,3-5" → {"1","3-5"}
options.fileflags = excerptModule.numberflags(args.files or "") -- parse file numbers
return options
end

local isArticle = function(pagetitle)
local titleObject = mw.title.new(pagetitle)
return ( titleObject and titleObject.namespace == 0 ) and true or false
end

local getLinkedTitles = function(args, method, limit)
local pagenames = {}
local ii = 1
local isNotCategory
while args[ii] and ii < limit do
local pageContent = excerptModule.getContent(args[ii])
if pageContent then
local pageSection = args["section"..ii] or args["section"]
local sectionOnly = args["sectiononly"..ii] or args["sectiononly"]
local text = pageContent
if pageSection then -- check relevant section only
text = excerptModule.getsection(pageContent, pageSection, sectionOnly) or pageContent
end
-- replace annotated links with real links
text = mw.ustring.gsub(text, "{{%s*[Aa]nnotated[ _]link%s*|%s*(.-)%s*}}", "[[%1]]")
if method == "linked" then
for p in mw.ustring.gmatch(text, "%[%[%s*([^%]|\n]*)") do
if isArticle(p) then
table.insert(pagenames, p)
end
end
else
-- listitem: first wikilink on a line beginning *, :#, etc. except in "See also" or later section
text = mw.ustring.gsub(text, "\n== *See also.*", "")
for p in mw.ustring.gmatch(text, "\n:*[%*#][^\n]-%[%[%s*([^%]|\n]*)") do
if isArticle(p) then
table.insert(pagenames, p)
end
end
end
end
ii = ii + 1
end
return pagenames
end

-- Template entry points:

-- randomExcerpt: Titles specified in template parameters (equivalent to {{Transclude random excerpt}})
p.randomExcerpt = function(frame)
local parent = frame.getParent(frame)
local output = p._excerpt(parent.args, 'random')
return frame:preprocess(output)
end

-- linkedExcerpt: Titles from links on one or more pages (similar to {{Transclude linked excerpt}})
p.linkedExcerpt = function(frame)
local parent = frame.getParent(frame)
local output = p._excerpt(parent.args, 'linked')
return frame:preprocess(output)
end

-- listItemExcerpt: Titles from linked list items one one or more pages (similar to {{Transclude list item excerpt}})
p.listItemExcerpt = function(frame)
local parent = frame.getParent(frame)
local output = p._excerpt(parent.args, 'listitem')
return frame:preprocess(output)
end

-- Module entry point:

p._excerpt = function(_args, method)
local args = cleanupArgs(_args)
-- check for blank value in more parameter
if _args.more and not args.more then
args.more = "Read more..." -- default text for blank more=
end
local galleryArgs = {}
local options = makeOptions(args)
local limit = args.limit and tonumber(args.limit) or 50
local titles
if method == 'linked' or method == 'listitem' then
titles = getLinkedTitles(args, method, 50)
else
titles = args
end
local galleryArgs = makeGalleryArgs(titles, options, limit)
return slideshowModule._main(galleryArgs, false, 'excerptSlideshow-container')
end

return p

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Evad37: preprocess parser functions