پودمان:Book

توضیحات این پودمان می‌تواند در پودمان:Book/توضیحات قرار گیرد.

local getArgs = require('Module:Arguments').getArgs
local collectionPrefix = 'Wikilivros:Livros/'
 
local arraySearch = function ( needle, haystack )
	for k,v in pairs( haystack ) do
		if v == needle then
			result = k;
		end
	end
	return result;
end

local function getArgNums(args)
	-- Returns an array containing the keys of all positional arguments that contain data (i.e. non-whitespace values).
	local nums = {}
	for k, v in pairs(args) do
		if v and type(k) == 'number' then
			table.insert(nums, k)
		end
	end
	table.sort(nums)
	return nums
end

-- [[Predefinição:NOMEDOLIVRO]]
local getBookName = function ( page )
	page = page or mw.title.getCurrentTitle().text
	local pos = mw.ustring.find( page, '/' )
	if pos == nil then
		return page
	end
	return mw.ustring.sub( page, 1, pos - 1 )
end

-- [[Predefinição:NOMEDOCAPÍTULO]]
local getChapterName = function ( page )
	page = page or mw.title.getCurrentTitle().text
	local pos = mw.ustring.find( page, '/' )
	if pos == nil then
		return ''
	end
	return mw.ustring.sub( page, pos + 1 )
end

-- [[Predefinição:EXISTBASEPAGENAME]]
local getExistingBasePageName = function ( page )
	if not page or page == '' then
		page = mw.title.getCurrentTitle().text
	end
	local parts = mw.text.split( page, '/', true )
	if #parts == 1 then
		return page
	end
	for i = #parts-1, 1, -1 do
		local base = table.concat( parts, '/', 1, i )
		if mw.title.new( base ).exists then
			return base
		end
	end
	return table.concat( parts, '/', 1, #parts-1 )
end

-- [[Predefinição:EXISTSUBPAGENAME]]
local getExistingSubPageName = function ( page )
	if not page or page == '' then
		page = mw.title.getCurrentTitle().text
	end
	local parts = mw.text.split( page, '/', true )
	if #parts == 1 then
		return page
	end
	for i = #parts-1, 1, -1 do
		local base = table.concat( parts, '/', 1, i )
		if mw.title.new( base ).exists then
			return table.concat( parts, '/', i + 1 )
		end
	end
	return parts[ #parts ]
end

-- Based on [[Template:AutoCat]]
local categories = function ( args )
	local title = mw.title.new( args['página'] or '' ) or mw.title.getCurrentTitle()
	if title.namespace ~= 0 then
		-- This function should be used only for pages from main namespace
		return ''
	end
	local text = title.text
	local parts = mw.text.split( text, '/', true )
	chText = table.concat( parts, '/', 2 )
	local result = {}
	if chText == '' and #parts == 1 then
		-- This is the index
		table.insert( result, '[[Categoria:Todos os livros catalogados|' .. text .. ']]'  )
		local argNums = getArgNums( args )
		for i, num in ipairs( argNums ) do
			-- The index should be added to each category which is appropriated to the book
			table.insert( result, '[[Categoria:' .. tostring( args[num] ) .. '|*' .. text .. ']]' )
		end
		table.insert( result, '[[Categoria:Livro/' .. text .. '|' .. text .. ']]' )
	else
		-- This is a chapter
		for i = 1, #parts-1 do
			local prefix = table.concat( parts, '/', 1, i )
			local subcat = 'Categoria:Livro/' .. prefix
			if mw.title.new( subcat ).exists or i == 1 then
				table.insert( result, '[[' .. subcat .. '|' .. table.concat( parts, '/', i+1 ) .. ']]' )
			else
				break
			end
		end
	end
	return table.concat( result, '\n' )
end

-- Based on parseCollectionLine from https://gerrit.wikimedia.org/r/gitweb?p=mediawiki/extensions/Collection.git;a=blob;f=Collection.body.php;hb=f2bd4ee2be12ab3df5f2dcb3bd56ff17247fff66#l793)
-- Get "Book/Title" from a line in any of these formats:
-- :[[Book/Title]]
-- :[[Book/Title|Text]]
-- :[{{fullurl:Book/Title|oldid=12345}} Text]
local getChapterFromLine = function ( line )
	if mw.ustring.sub( line, 1, 1 ) ~= ':' then
	    -- There is no chapter on this line
	    return nil
	end
	line = mw.text.trim( mw.ustring.sub( line, 2, -1 ) )

	local title = mw.ustring.match( line, '^%[%[:?(.-)|.-%]%]$' ) or
		mw.ustring.match( line, '^%[%[:?(.-)%]%]$' ) or
		mw.ustring.match( line, '^%[{{fullurl:(.-)|oldid=.-}}%s+.-%]$' ) or
		''
	return title:gsub( '_',' ' )
end

local getListOfChaptersFromText = function ( str )
	local lines = mw.text.split( str, '[\r\n]+' )
	local i, line, chapter
	local result = {}
	for i, line in ipairs( lines ) do
		chapter = getChapterFromLine( line )
		if chapter and chapter ~= '' then
			table.insert( result, chapter )
		end
	end
	return result
end

local getChapters = function ( collectionPage )
	collectionPage = collectionPage or ( collectionPrefix .. getBookName() )
	local colContent = mw.title.new( collectionPage ):getContent()
	if colContent == nil then
		-- This book doesn't have a collection page
		return {}
	end
	-- FIXME: Optimize the code so it works for large books
	-- FIXME: Implement a limit on the number of chapters (Collection uses 500 by default)
	local chapters = getListOfChaptersFromText( mw.ustring.sub( colContent, 1, 18000 ) )
	return chapters
end

local getPrintableVersion = function ( chapters )
	chapters = chapters or getChapters()
	local frame = mw.getCurrentFrame()
	local result = ''
	local i, chapter
	for i, chapter in ipairs( chapters ) do
		if mw.title.new( chapter ).exists then
			result = result ..
				'<h1>[[' .. chapter .. '|' .. getChapterName( chapter ) .. ']]</h1>\n' ..
				frame:expandTemplate{ title = ':' .. chapter } .. '\n\n'
		end
	end
	return result
end

local core = function ( chapters, page, pPosition, relPosition )
	if pPosition == 'first' then
		return chapters[1];
	end
	if pPosition == 'last' then
		return chapters[#chapters];
	end
	if pPosition ~= nil and chapters[pPosition] then
		return chapters[pPosition];
	end
	local cPosition = arraySearch( page, chapters );
	if cPosition == nil then
		return '';
	end
	if pPosition == 'prev' then
		return chapters[cPosition - 1];
	end
	if pPosition == 'next' then
		return chapters[cPosition + 1];
	end
	if relPosition == nil then
		return '';
	end
	return chapters[cPosition + relPosition];
end

local navbar = function( page )
	local page = page or mw.title.getCurrentTitle().text
	local bookName = getBookName( page )
	local chapters = getChapters( collectionPrefix .. bookName )
	local prevCh = core( chapters, page, 'prev' )
	local nextCh = core( chapters, page, 'next' )
	local ul = mw.html.create( 'ul' )
		:addClass( 'auto-nav' )
		:tag('li')
			:addClass( 'auto-nav-index' )
			:tag('a')
				-- FIXME: {{Acima|2}}
				:attr( 'title', 'Acima: ' .. bookName )
				-- FIXME: {{Acima}}
				:attr( 'href', tostring( mw.uri.localUrl( bookName ) ) )
				-- FIXME: {{Acima|2}}
				:wikitext( bookName )
				:done()
			:done()
	local a
	if prevCh ~= '' then
		a =	ul
			:tag('li')
				:addClass( 'auto-nav-prev' )
				:tag('a')
					-- FIXME: {{Anterior|2}}
					:attr( 'title', 'Anterior: ' .. prevCh )
					-- FIXME: {{Anterior}}
					:attr( 'href', tostring( mw.uri.localUrl( prevCh ) ) )
					-- FIXME: {{Anterior|2}}
					:wikitext( prevCh )
		if not mw.title.new( prevCh ).exists then
			a:addClass( 'new' )
		end
	end
	if nextCh ~= '' then
		a =	ul
			:tag('li')
				:addClass( 'auto-nav-next' )
				:tag('a')
					-- FIXME: {{Anterior|2}}
					:attr( 'title', 'Posterior: ' .. nextCh )
					-- FIXME: {{Anterior}}
					:attr( 'href', tostring( mw.uri.localUrl( nextCh ) ) )
					-- FIXME: {{Anterior|2}}
					:wikitext( nextCh )
		if not mw.title.new( nextCh ).exists then
			a:addClass( 'new' )
		end
	end
	return tostring( ul )
end

return {
	_arraySearch = arraySearch,
	_getBookName = getBookName,
	_getChapterName = getChapterName,
	_getExistingBasePageName = getExistingBasePageName,
	_getExistingSubPageName = getExistingSubPageName,
	_getChapterFromLine = getChapterFromLine,
	_getListOfChaptersFromText = getListOfChaptersFromText,
	_getChapters = getChapters,
	_getPrintableVersion = getPrintableVersion,
	_categories = categories,
	_navbar = navbar,
	_core = core,
	getBookName = function( frame )
		local args = getArgs( frame )
		return getBookName( args[1] )
	end,
	getChapterName = function( frame )
		local args = getArgs( frame )
		return getChapterName( args[1] )
	end,
	getExistingBasePageName = function( frame )
		local args = getArgs( frame )
		return getExistingBasePageName( args[1] )
	end,
	getExistingSubPageName = function( frame )
		local args = getArgs( frame )
		return getExistingSubPageName( args[1] )
	end,
	getPrintableVersion = function( frame )
		local bookName = frame.args[1] or getBookName()
		local chapters = getChapters( collectionPrefix .. bookName )
		return getPrintableVersion( chapters )
	end,
	nav = function ( frame )
		local chapters = getChapters( frame.args['list'] )
		-- On page [[*A'B&C"D]], {{PAGENAME}} returns "&#42;A&#39;B&#38;C&amp;#34;D", so decode it first!
		local page = mw.text.decode( frame.args['page'] or mw.title.getCurrentTitle().text );
		local pPosition = frame.args['position'];
		local relPosition = frame.args['relative-position'];
		return core( chapters, page, pPosition, relPosition );
	end,
	cat = function ( frame )
		local args = getArgs( frame, {
			valueFunc = function (key, value)
				if not value then
					return nil
				end
				value = mw.text.trim( value or '' )
				if ( type(key) == 'number' and value ~= '' ) or key == 'página' then
					return value
				end
			end
		} )
		return categories( args );
	end
};