Question

I have two classes in my REST API wrapeer: Wrapper::Folder and Wrapper::File. Each folder can contain numerous folders and files. The contents of folder can be retrived by .list. class method.

I want to implement .all class method for Wrapper::File which would return an array of all files in all folders.

The following method doesn’t work but shows something like I want.

class Wrapper::File
  def self.all
    folders = Wrapper::Folder.list('/')
    files = []
    while folders.size > 0
      folders.each do |object|
        if object.is_a?(Wrapper::Folder)
          folders = Wrapper::Folder.list('/')
        else
          files << object
        end
      end
    end
  end
end

Answer 1

Untested, but this would be the basic gist of the recursive solution. Would return an array of file names (with paths) and without directories.

def getFilesRecursive(path)

   # create our directory object and file list storage
   d = Dir.new(path)
   l = Array.new

   # iterate over our given directory
   d.each do |f|

     # exclude . and ..
     if !(f =~ /$[\.]{1,2}^/)

       # recurse on a directory
       if File.directory?(f)
         l += getFilesRecursive(path + f)

       # store on a file
       else
         l.push(path + f)
       end

     end # if not . or ..

   end # Dir.each

   # return our list of files
   return l

end # getFlesRecursive()

# let's get some files!
files = getFilesRecursive("/")