Module: Kindai::Util

Defined in:
lib/kindai/util.rb

Defined Under Namespace

Modules: Database

Class Method Summary collapse

Class Method Details

.append_suffix(path, suffix) ⇒ Object 



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# File 'lib/kindai/util.rb', line 60

def self.append_suffix(path, suffix)
  path.gsub(/\.(\w+)$/, "-#{suffix}.\\1")
end

.average(array) ⇒ Object 



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# File 'lib/kindai/util.rb', line 251

def self.average(array)
  array.inject{|a, b| a + b} / array.length.to_f
end

.debug_mode! ⇒ Object 



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# File 'lib/kindai/util.rb', line 17

def self.debug_mode!
  self.logger.level = Logger::DEBUG
  Kindai::Util.logger.info "debug mode enabled"
end

.divide_43(src_path, output_directory) ⇒ Object 



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# File 'lib/kindai/util.rb', line 255

def self.divide_43(src_path, output_directory)
  raise "#{src_path} not exist" unless File.exists? src_path
  Kindai::Util.logger.info "divide #{src_path}"

  output_base = File.join(output_directory, File.basename(src_path))

  img = Magick::ImageList.new(src_path)

  right = img.crop(img.columns - img.rows * 0.75, 0, img.columns * 0.75, img.rows)
  right.write(append_suffix(output_base, '0'))
  right = nil

  left = img.crop(0, 0, img.rows * 0.75, img.rows)
  left.write(append_suffix(output_base, '1'))
  left = nil

  File.delete(src_path) if File.basename(src_path) == output_directory
end

.download(uri, file) ⇒ Object 



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# File 'lib/kindai/util.rb', line 22

def self.download(uri, file)
  total = nil
  uri = URI.parse(uri) unless uri.kind_of? URI

  got = fetch_uri(uri)
  open(file, 'w') {|local|
    local.write(got)
  }
rescue Exception, TimeoutError => error
  if File.exists?(file)
    logger.debug "delete cache"
    File.delete(file)
  end
  raise error
end

.execute_and_log(command) ⇒ Object 



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# File 'lib/kindai/util.rb', line 64

def self.execute_and_log(command)
  logger.debug command
  system command or raise "#{commands} failed"
end

.expand_params(params) ⇒ Object

input: => ‘a’, :b => ‘bbb’ output: ‘a=a&b=bbb



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# File 'lib/kindai/util.rb', line 56

def self.expand_params(params)
  URI.encode_www_form(params)
end

.fetch_uri(uri, rich = false) ⇒ Object 



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# File 'lib/kindai/util.rb', line 96

def self.fetch_uri(uri, rich = false)
  uri = URI.parse(uri) unless uri.kind_of? URI
  self.logger.debug "fetch_uri #{uri}"

  return uri.read unless rich

  total = nil
  from = Time.now
  got = uri.read(
    :content_length_proc => proc{|_total|
      total = _total
    },
    :progress_proc => proc{|now|
      if Time.now - from > 0.2
        from = Time.now
        print "%3d%% #{now}/#{total}\r" % (now/total.to_f*100)
        $stdout.flush
      end
    })
  raise "received size unmatch(#{got.bytesize}, #{total})" if got.bytesize != total
  return got
end

.generate_zip(directory) ⇒ Object 



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# File 'lib/kindai/util.rb', line 69

def self.generate_zip(directory)
  Kindai::Util.logger.info "zip #{directory}"
  directory = File.expand_path(directory)
  raise "#{directory} is not directory." unless File.directory? directory

  filename = File.expand_path(File.join(directory, '..', "#{File.basename(directory)}.zip"))
  files = Dir.glob(File.join(directory, '*jpg'))
  begin
    Zip::Archive.open(filename, Zip::CREATE) {|arc|
      files.each{|f| arc.add_file(f) }
    }
  rescue => error
    File.delete(filename) if File.exists?(filename)
    logger.warn "#{error.class}: #{error.message}"
    logger.warn "zipruby died. trying zip command"
    generate_zip_system_command(directory)
  end
end

.generate_zip_system_command(directory) ⇒ Object 



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# File 'lib/kindai/util.rb', line 88

def self.generate_zip_system_command(directory)
  Kindai::Util.logger.info "zip(system) #{directory}"
  from = Dir.pwd
  Dir.chdir(directory)
  execute_and_log "zip -q -r '../#{File.basename(directory)}.zip' *jpg"
  Dir.chdir(from)
end

.get_redirected_uri(uri) ⇒ Object 



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# File 'lib/kindai/util.rb', line 119

def self.get_redirected_uri(uri)
  uri = URI.parse(uri) unless uri.kind_of? URI
  self.logger.debug "get_redirected_uri #{uri}"

  response = nil
  proxy_uri = URI.parse(ENV["http_proxy"] || ENV["HTTP_PROXY"] || "")
  proxy_user, proxy_pass = proxy.userinfo.split(/:/) if proxy_uri.userinfo
  Net::HTTP.Proxy(proxy_uri.host, proxy_uri.port,
                  proxy_user, proxy_pass).start(uri.host, uri.port) {|http|
    response = http.head(uri.request_uri)
  }
  response['Location']
end

.logger ⇒ Object 



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# File 'lib/kindai/util.rb', line 10

def self.logger
  return @logger if @logger
  @logger ||= Logger.new(STDOUT)
  @logger.level = Logger::INFO
  @logger
end

.resize_file_to(src_path, dst_path, info) ⇒ Object 



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# File 'lib/kindai/util.rb', line 243

def self.resize_file_to(src_path, dst_path, info)
  Kindai::Util.logger.info "resize #{src_path}"
  img = Magick::ImageList.new(src_path)
  img.resize_to_fit(info[:width], info[:height]).write dst_path

  img = nil
end

.rich_download(uri, file) ⇒ Object 



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# File 'lib/kindai/util.rb', line 38

def self.rich_download(uri, file)
  total = nil
  uri = URI.parse(uri) unless uri.kind_of? URI

  got = fetch_uri(uri, true)
  open(file, 'w') {|local|
    local.write(got)
  }
rescue Exception, TimeoutError => error
  if File.exists?(file)
    logger.debug "delete cache"
    File.delete(file)
  end
  raise error
end

.trim_file_to(src_path, dst_path, info = nil) ⇒ Object 



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# File 'lib/kindai/util.rb', line 231

def self.trim_file_to(src_path, dst_path, info = nil)
  info = trim_info(src_path) unless info
  Kindai::Util.logger.info "trim #{src_path}"

  img = Magick::ImageList.new(src_path)
  img.crop! info[:x], info[:y], info[:width], info[:height]
  img.write dst_path

  img = nil
end

.trim_info(img_path, erase_center_line = true) ⇒ Object

XXX: GC



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# File 'lib/kindai/util.rb', line 176

def self.trim_info(img_path, erase_center_line = true)
  debug = false
  img = Magick::ImageList.new(img_path)

  thumb = img.resize_to_fit(400, 400)

  thumb.write('a1.jpg') if debug
  # thumb = thumb.normalize
  thumb = thumb.level(Magick::QuantumRange*0.4, Magick::QuantumRange*0.7)
  thumb.write('a2.jpg') if debug

  d = Magick::Draw.new
  d.fill = 'white'
  cut_x = 0.07
  cut_y = 0.04
  d.rectangle(thumb.columns * 0.4, 0, thumb.columns * 0.6, thumb.rows) if erase_center_line # center line
  d.rectangle(0, 0, thumb.columns * cut_x, thumb.rows) # h
  d.rectangle(0, thumb.rows * (1 - cut_y), thumb.columns, thumb.rows)    # j
  d.rectangle(0, 0, thumb.columns, thumb.rows * cut_y)             # k
  d.rectangle(thumb.columns * (1 - cut_x), 0, thumb.columns, thumb.rows) # l
  d.draw(thumb)
  thumb.write('a.jpg') if debug

  # thumb = thumb.threshold(Magick::QuantumRange*0.8)
  # thumb.write('b.jpg') if debug

  thumb.fuzz = 50
  thumb.trim!
  thumb.write('c.jpg') if debug

  scale = thumb.base_columns / thumb.page.width.to_f

  info = {
    :x => thumb.page.x * scale,
    :y => thumb.page.y * scale,
    :width => thumb.columns * scale,
    :height => thumb.rows * scale
  }

  # erased by cente line?
  if (thumb.page.x / thumb.page.width.to_f - 0.6).abs < 0.05 && erase_center_line
    Kindai::Util.logger.info "retry trim(erased by center line?)"
    new_info = trim_info(img_path, false)
    Kindai::Util.logger.debug "x: #{info[:x]} -> #{new_info[:x]}"
    Kindai::Util.logger.debug "width: #{info[:width]} -> #{new_info[:width]}"
    info[:x] = new_info[:x]
    info[:width] = new_info[:width]
  end

  img = nil
  thumb = nil

  return info
end

.trim_info_auto(book, files) ⇒ Object 



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# File 'lib/kindai/util.rb', line 133

def self.trim_info_auto(book, files)
  info = nil
  item = Kindai::Util::Database.item_for_book(book)
  if item
    self.logger.info "found trimming info"
    return {
      :x      => item[:x],
      :y      => item[:y],
      :width  => item[:width],
      :height => item[:height],
    }
  end

  info = self.trim_info_by_files(files)
  self.logger.info "save trimming info"
  Kindai::Util::Database.save_item(book, info)
  return info
rescue => error
  self.logger.error "#{error.class}: #{error.message}"
  info || self.trim_info_by_files(files)
end

.trim_info_by_files(files) ⇒ Object 



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# File 'lib/kindai/util.rb', line 155

def self.trim_info_by_files(files)
  Kindai::Util.logger.info "get trimming info"
  positions = {:x => [], :y => [], :width => [], :height => []}
  files.each{|file|
    pos = trim_info(file)

    [:x, :y, :width, :height].each{|key|
      positions[key] << pos[key]
    }

    GC.start
  }

  good_pos = {}
  [:x, :y, :width, :height].each{|key|
    good_pos[key] = average(positions[key])
  }
  good_pos
end