Module:Présentation

--[[

]]

local presentation = {}

function presentation.total( frame )

   local sequence = presentation._expandSequence( mw.title.getCurrentTitle() )
   return table.getn( sequence )

end

function presentation.current( frame )

   local sequence = presentation._expandSequence( mw.title.getCurrentTitle() )
   for i, v in pairs( sequence ) do
       if v == mw.title.getCurrentTitle().fullText then
           return i
       end
   end
   return 0

end

function presentation.next( frame )

   local sequence = presentation._expandSequence( mw.title.getCurrentTitle() )
   for i, v in pairs( sequence ) do
       if v == mw.title.getCurrentTitle().fullText then
           return sequence[i+1]
       end
   end
   if not mw.title.getCurrentTitle().isSubpage then
       return sequence[1]
   end
   return 

end

function presentation.previous( frame )

   local sequence = presentation._expandSequence( mw.title.getCurrentTitle() )
   for i, v in pairs( sequence ) do
       if v == mw.title.getCurrentTitle().fullText then
           return sequence[i-1]
       end
   end
   return 

end

function presentation._expandSequence( title )

   local list = {};
   title = title.rootPageTitle;
   while true do
       if title:subPageTitle( '0' ).exists then
           title = title:subPageTitle( '0' )
       elseif title:subPageTitle( '1' ).exists then
           title = title:subPageTitle( '1' )
       elseif tonumber(title.subpageText) ~= nil then
           if not title.exists then
               if title.baseText == title.rootText then
                   break
               end
               title = title.basePageTitle.basePageTitle:subPageTitle( tostring(tonumber(title.basePageTitle.subpageText)+1) )
           else
               title = title.basePageTitle:subPageTitle( tostring(tonumber(title.subpageText)+1) )
           end
       else
           break
       end
       if title.exists then
           list[table.getn(list)+1] = title.fullText
       end
   end
   return list

end

return presentation