Class: Downer::DownloadManager

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url_source, target_directory, output, options = {}) ⇒ DownloadManager

Returns a new instance of DownloadManager.



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# File 'lib/downer/download_manager.rb', line 15

def initialize(url_source, target_directory, output, options ={})
  @url_source = url_source
  @output = output
  @target_directory = append_slash_to_path(target_directory) 
  @strategy = StrategyFinder::find_strategy(@url_source, options)
end

Instance Attribute Details

#downloaded_files ⇒ Object (readonly)

Returns the value of attribute downloaded_files.



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# File 'lib/downer/download_manager.rb', line 13

def downloaded_files
  @downloaded_files
end

#output ⇒ Object

Returns the value of attribute output.



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# File 'lib/downer/download_manager.rb', line 12

def output
  @output
end

#source_type ⇒ Object

Returns the value of attribute source_type.



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# File 'lib/downer/download_manager.rb', line 12

def source_type
  @source_type
end

#strategy ⇒ Object (readonly)

Returns the value of attribute strategy.



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# File 'lib/downer/download_manager.rb', line 13

def strategy
  @strategy
end

#target_directory ⇒ Object

Returns the value of attribute target_directory.



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# File 'lib/downer/download_manager.rb', line 12

def target_directory
  @target_directory
end

#urls ⇒ Object (readonly)

Returns the value of attribute urls.



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# File 'lib/downer/download_manager.rb', line 13

def urls
  @urls
end

Instance Method Details

#check_directory ⇒ Object

Determine whether the direcotry specified exists. If it does not, see if its parent is writable. If not, give up and throw error



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# File 'lib/downer/download_manager.rb', line 55

def check_directory
  if File.writable?(@target_directory)
    return true
  else
    #FileUtils.mkdir(@target_directory)
    raise WriteFailed
  end
end

#print_session_summary(worker) ⇒ Object

Tells us what worked and what failed



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# File 'lib/downer/download_manager.rb', line 37

def print_session_summary(worker)
  @output.puts "Session complete."
  @output.puts "\n\n"
  @output.puts "----------------------------------"
  @output.puts "SUMMARY:"
  @output.puts "Successful downloads: (#{worker.successful_downloads.size})"
  @output.puts "Failed downloads: (#{worker.failed_downloads.size}): "
  worker.failed_downloads.each do |fail|
    @output.puts "  * #{fail}"
  end
end

#start ⇒ Object 



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# File 'lib/downer/download_manager.rb', line 22

def start
  check_directory
  
  if @strategy && @strategy.source_valid?
    urls = @strategy.get_urls
    @output.puts "Starting download on #{urls.size} files"
    worker = DownloadWorker.new(urls, @target_directory, @output)
    @downloaded_files = worker.start
    print_session_summary(worker)
  else
    @output.puts "Could not open url source #{@url_source}"
  end
end