Class: InlineUploader::Attacher

Inherits:
Object
  • Object
show all
Defined in:
lib/inline_uploader.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, delegate) ⇒ Attacher

Returns a new instance of Attacher.



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# File 'lib/inline_uploader.rb', line 45

def initialize(app, delegate)
  @delegate = delegate
  @app      = app
end

Instance Method Details

#attach_fds(params) ⇒ Object 



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# File 'lib/inline_uploader.rb', line 79

def attach_fds(params)
  params.inject({}) do |fds, kv|
    key, val = kv

    if val.is_a? Hash
      fds.merge! attach_fds(params[key])

    elsif tag = get_valid_tag(val)
      upload = File.join(@delegate.upload_dir, tag)

      if File.exist?(upload)
        file            = YAML.load_file("#{upload}_meta")
        file[:name]     = key
        file[:tempfile] = File.open(upload, 'rb')

        params[key] = file
        fds[tag]    = file[:tempfile]

        logger.info "attaching upload file at #{upload}"
      else
        params[key] = nil

        logger.info "no upload file found at #{upload}"
      end
    end

    fds
  end
end

#attach_previous_uploads(*hashes) ⇒ Object 



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# File 'lib/inline_uploader.rb', line 60

def attach_previous_uploads(*hashes)
  return yield unless hashes.inject(false) {|others,h| !h.delete(@delegate.flag_param).nil? or others }

  logger.info "Attaching Inline Upload Tags."
  fds = {}

  begin
    hashes.each {|h| fds.merge! attach_fds(h) }

    yield

  ensure
    fds.values.each do |f|
      f.close unless f.closed?
      FileUtils.rm(f.path) if File.exist?(f.path)
    end
  end
end

#call(env) ⇒ Object 



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# File 'lib/inline_uploader.rb', line 50

def call(env)
  request = Rack::Request.new(env)

  # we have to look at both get and post as if Rack::Request.params 
  # has been called, GET will also contain all POST params. go figure.
  attach_previous_uploads request.GET, request.POST do
    return @app.call(env)
  end
end

#get_valid_tag(val) ⇒ Object

returns a valid tag or nil.



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# File 'lib/inline_uploader.rb', line 110

def get_valid_tag(val)
  val if val.is_a? String and val.length == TAG_LENGTH and val =~ TAG_REGEXP
end

#logger ⇒ Object 



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# File 'lib/inline_uploader.rb', line 114

def logger
  @delegate.logger
end