Class: Scraptacular::CommandLine

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

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CommandLine

Returns a new instance of CommandLine.



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# File 'lib/scraptacular/command_line.rb', line 7

def initialize
  parse_options

  at_exit do
    next unless $!.nil? || $!.kind_of?(SystemExit)

    status = run(options).to_i
    exit status if status != 0
  end
end

Instance Method Details

#load_file(file_name) ⇒ Object 



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# File 'lib/scraptacular/command_line.rb', line 18

def load_file(file_name)
end

#options ⇒ Object 



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# File 'lib/scraptacular/command_line.rb', line 21

def options
  @options ||= {}
end

#parse_options ⇒ Object 



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# File 'lib/scraptacular/command_line.rb', line 25

def parse_options
  @options = {}

  OptionParser.new do |parser|
    parser.banner = "Usage: scraptacular -d DEFINITION_FILE -s SESSION_FILE"

    parser.on('-d', '--definition-file DEFINITION_FILE', 'Specify a file container scraper definitions') do |file|
      @options[:definition_file] = file
    end
    parser.on('-s','--session-file SESSION_FILE','Specify groups, suites, and URLs to be scraped') do |file|
      @options[:session_file] = file
    end
    parser.on('-o','--output-file [OUTPUT_FILE]', 'Scrape result output file. Only useful for text output') do |file|
      @options[:output_file] = file
    end

    parser.on('-g GROUP', '--group', 'Specify a single group to scrape') do |group|
      @options[:only_group] = group
    end

    parser.on('-f', '--format [FORMAT]', 'only "json" is supported') do |format|
      @options[:format] = "json"
    end
    
    parser.on_tail('-h','--help','The help file') do
      puts parser
      exit
    end
  end.parse!
end

#run(options, out = $stdout) ⇒ Object 



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# File 'lib/scraptacular/command_line.rb', line 56

def run(options, out = $stdout)
  return 1 unless (validate_file(options[:definition_file], "definition file", out)  &&
                  validate_file(options[:session_file], "session file", out) )

  res = Scraptacular.world.run(options)

  #TODO: Replace with "Formatters" e.g. JSONFormatter, XMLFormatter, whatever
  if options[:format] == "json"  
    res.each do |group, suites|
      suites.each do |suite, results|
        suites[suite] = results.map!(&:to_h)
      end
    end

    res = res.to_json
  end

  # TODO : Replace with "Outputters". 
  if options[:output_file]
    File.open(options[:output_file], 'w') { |file| file.write(res) }
  else
    out.puts res
  end

  return 0
end

#validate_file(file_name, caption, out) ⇒ Object 



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# File 'lib/scraptacular/command_line.rb', line 83

def validate_file(file_name, caption, out)
  if file_name.nil?
    out.puts "You must specify a #{caption}. See --help for more information"
    return false
  else
    if File.exists?(file_name)
      load file_name
      return true
    else
      out.puts "The #{caption} specified does not exist: #{file_name}"
      return false
    end

  end
end