Module:Excerpt slideshow

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

local DEFAULT_LIMIT = 25 -- max number of excerpts to be shown in the slideshow local SOURCE_PAGES_LIMIT = 10 -- max number of pages to check for links / list items

-- begin BHG addition for tracking source pages local sourcepgagesused = {}; local sourcepgagesusedcounter = 0; local articlelistcount = -1; local usesEmbeddedList = false; -- end BHG addition for tracking source pages

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

function isDeclined(val) if not val then return false end local declinedWords = " decline declined exclude excluded false none not no n off omit omitted remove removed " return string.find(declinedWords, ' '..val..' ', 1, true ) and true or false 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 ' 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 = '' elseif #this.level > #lastLevel then tags = string.rep('', #this.level - #lastLevel) elseif isLastItem then tags = string.rep('', #lastLevel) else -- ( #this.level < #lastLevel ) and not last item tags = string.rep('', #lastLevel - #this.level ) .. '' 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 ' 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

function makeGalleryArgs(titles, options, limit, nonRandom) local galleryArgs = {} local titlesSequence = {} local i = 1 while titles[i] do		titlesSequence[i] = titles[i] i = i + 1 end local sortedTitles = nonRandom and titlesSequence or randomModule.main('array', {t=titlesSequence, limit=limit}) for _i, title in ipairs(sortedTitles) do		if (#galleryArgs / 2) < limit then local excerpt = mw.text.trim(excerptModule.main({title}, options)) if excerpt and excerpt ~= '' and #excerpt > 10 then -- temporarily take off the Read more... link if present readmore_start_index, readmore_end_index, readmore_text = mw.ustring.find(excerpt, "(%s*%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-1) end end if excerpt and excerpt ~= '' and #excerpt > 10 then -- check again in case we had a few characters plus Read more... -- 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, '|', '&#124;') -- 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 = '' .. mw.ustring.gsub(excerpt, '%c', ' ') .. ' '				table.insert(galleryArgs, 'File:Blank.png') table.insert(galleryArgs, text) end end end if nonRandom then galleryArgs.random = 'false' end if #galleryArgs == 0 and options.nostubs then -- try again, this time including stubs options.nostubs = false return makeGalleryArgs(titles, options, limit, nonRandom) else return galleryArgs end 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 if args.nostubs and isDeclined(args.nostubs) then options.nostubs = false else options.nostubs = true end 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 -- begin BHG addition for tracking source pages local thisPage = mw.title.getCurrentTitle.nsText .. ":" .. mw.title.getCurrentTitle.text local thisBareParam = mw.ustring.gsub(args[ii], "^([^#]+).*$", "%1", 1) -- strip any section anchor from the parameter's page name if (thisPage == thisBareParam) then usesEmbeddedList = true; end -- end BHG addition for tracking source pages -- replace annotated links with real links text = mw.ustring.gsub(text, "", "%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 -- begin BHG addition for tracking source pages if ((method == "listitem") or (method == "linked")) then table.insert(sourcepgagesused, args[ii]) sourcepgagesusedcounter = sourcepgagesusedcounter + 1 end -- end BHG addition for tracking source pages end ii = ii + 1 end -- begin BHG addition for tracking articlelistcount = #pagenames -- end BHG addition for tracking return pagenames end

-- Template entry points:

-- randomExcerpt: Titles specified in template parameters (equivalent to ) 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 ) 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 ) 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 DEFAULT_LIMIT local titles if method == 'linked' or method == 'listitem' then titles = getLinkedTitles(args, method, SOURCE_PAGES_LIMIT) else titles = args end local galleryArgs = makeGalleryArgs(titles, options, limit, isDeclined(_args.random)) return slideshowModule._main(galleryArgs, false, 'excerptSlideshow-container') .. checksourcepages end

-- begin BHG addition for tracking source pages function checksourcepages -- no tracking unless we are in Portal namespace if (mw.title.getCurrentTitle.nsText ~= "Portal") then return "" end local pagecounter = 0; local templatecount = 0; local outlinecount = 0; local retval =""; local usesEponymousArticle = false; local debugging = false; local thisPageBareName = mw.title.getCurrentTitle.text; if debugging then retval = ' \n\n' retval = retval .. "sourcepgagesusedcounter: " .. sourcepgagesusedcounter .. "\n\n" retval = retval .. "pages used:" end local apage for apage in arrayvalues(sourcepgagesused) do		if debugging then retval = retval .. "\n# " .. apage .. "" retval = retval .. " — " .. "First 999 = /" .. string.sub(apage, 1, 999) .. "/"		end if (string.find(apage, "^[tT]emplate ?:") == 1) then templatecount = templatecount + 1; end if (string.find(apage, "^[oO]utline +of ") == 1) then outlinecount = outlinecount + 1; end if (apage == thisPageBareName) then usesEponymousArticle = true; end pagecounter = pagecounter + 1 end if debugging then retval = retval .. "\nTotal pages: " .. pagecounter retval = retval .. "\ntemplatecount: " .. templatecount retval = retval .. " "	end -- first do a sanity check that both counting methods have produced the same result if (sourcepgagesusedcounter == pagecounter) then -- if all pages are templates, then populate tracking categories if (pagecounter == templatecount) then if (templatecount == 1) then retval = retval .. ""			elseif (templatecount == 2) then retval = retval .. ""			elseif (templatecount == 3) then retval = retval .. ""			elseif (templatecount > 3) then retval = retval .. ""			end elseif (templatecount > 0) then retval = retval .. ""		end end if (outlinecount >= 1) then retval = retval .. ""	end if (articlelistcount < 2) then retval = retval .. ""	elseif (articlelistcount <= 5) then retval = retval .. ""	elseif (articlelistcount <= 10) then retval = retval .. ""	elseif (articlelistcount <= 15) then retval = retval .. ""	elseif (articlelistcount <= 20) then retval = retval .. ""	elseif (articlelistcount <= 25) then retval = retval .. ""	elseif (articlelistcount <= 30) then retval = retval .. ""	elseif (articlelistcount <= 40) then retval = retval .. ""	elseif (articlelistcount <= 50) then retval = retval .. ""	elseif (articlelistcount <= 100) then retval = retval .. ""	elseif (articlelistcount <= 200) then retval = retval .. ""	elseif (articlelistcount <= 500) then retval = retval .. ""	elseif (articlelistcount <= 1000) then retval = retval .. ""	elseif (articlelistcount > 1000) then retval = retval .. ""	end if usesEmbeddedList then retval = retval .. ""		end if usesEponymousArticle then retval = retval .. ""	end return retval end

function arrayvalues(t) local i = 0 return function i = i + 1; return t[i] end end

-- end BHG addition for tracking source pages return p