Class: Nyaa::UI

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

Constant Summary collapse

DOC = 
"#{Nyaa::Utils.gem_libdir}/HELP"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, search) ⇒ UI

Returns a new instance of UI.



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# File 'lib/nyaa/ui.rb', line 10

def initialize (config, search)
  @config = config
  @status = { :text => 'Ready.', :type => :default }
  setup_curses

  # columns
  @info_columns = %w[ Size SE LE ]
  @info_column_width = 10
  @name_column_width = 0

  # commands
  @commands = {
    '?' => 'help',
    'g' => 'get',
    's' => 'start',
    'i' => 'info',
    'n' => 'next',
    'p' => 'prev',
    'q' => 'quit',
  }

  @search = search
  @torrents = @search.more.results
  @num_torrents = @torrents.size
  @loading = @torrents.size % 100 == 0 ? true : false;
  harvester # start bg harvester
  
  @menusize = lines - 4 # lines - header + footer + status
  @page = 1
  @num_pages = (@search.count/@menusize.to_f).ceil
  @offset = 0
  # TODO: on hold state: prevent paging forward when waiting on results
end

Instance Attribute Details

Returns the value of attribute menusize.



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# File 'lib/nyaa/ui.rb', line 6

def menusize
  @menusize
end

#page ⇒ Object

Returns the value of attribute page.



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# File 'lib/nyaa/ui.rb', line 6

def page
  @page
end

Instance Method Details



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# File 'lib/nyaa/ui.rb', line 60

def footer
  footer_text = @commands.map { |k,v| "#{k}: #{v}" }.join('  ')
  attrset(color_pair(2))
  setpos(lines - 1, 0)
  addstr(sprintf " %-#{cols}s", footer_text)

  search_summary = sprintf " %-14s %-14s %-14s",
    "view: [#{@offset+1}-#{@offset+@menusize}]/#{@search.count}",
    "recv: #{@num_torrents}/#{@loading ? "unk" : @search.count}",
    "page: #{@page}/#{@loading ? "unk" : @num_pages}"
  attrset(color_pair(2))
  setpos(lines - 2, 0)
  addstr(sprintf "%-#{cols}s", search_summary)
end

#get(choice) ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 155

def get(choice)
  torrent = @torrents[@offset + choice - 1]
  download = Downloader.new(torrent.link, @config[:output])
  path = download.save

  unless download.failed?
    status("Downloaded successful: #{torrent.tid}", :success)
  else
    status("Download failed (3 attempts): #{torrent.tid}", :failure)
    return nil;
  end

  return path;
end

#harvester ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 208

def harvester
  Thread.new do
    last = @torrents.size;
    loop do
      @torrents = @search.more.results
      @num_torrents = @torrents.size

      if last == @torrents.size then
        @loading = false;
        @num_pages = (@torrents.size / @menusize.to_f).ceil;
        @page = @page > @num_pages ? @num_pages : @page;
        @offset = (@page - 1) * @menusize;
        break;
      end

      last = @torrents.size;
      sleep(2);
    end
    Thread.kill
  end
end

#header ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 44

def header
  # pad info columns to column width
  @info_columns = @info_columns.map do |column|
    sprintf("%#{@info_column_width}s", column)
  end
  # key column width is whatever is leftover
  @name_column_width = cols - (@info_columns.length * @info_column_width)

  # header bar
  cat = CATS[@config[:category].to_sym][:title]
  header_text = sprintf " %-#{@name_column_width-1}s%s", "Nyaa - #{cat}", @info_columns.join
  attrset(color_pair(1))
  setpos(0,0)
  addstr(sprintf "%-#{cols}s", header_text)
end

#help ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 128

def help
  system("less #{DOC}")
  clear
end

#menu(highlight) ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 92

def menu(highlight)
  xpos = 1
  attrset(color_pair(0))
  setpos(xpos, 0)

  (0..@menusize-1).each do |i|

    if i < @search.count - @offset
        line_text = sprintf("% -#{@name_column_width}s %9s %9s %9s",
          truncate("#{@torrents[@offset + i].name}", @name_column_width),
          @torrents[@offset + i].filesize,
          @torrents[@offset + i].seeders,
          @torrents[@offset + i].leechers)

        attrset(color_pair(torrent_status(@torrents[@offset + i])))
        setpos(xpos, 0)
        # highlight the present choice
        if highlight == i + 1
          attron(A_STANDOUT)
          addstr(line_text)
          attroff(A_STANDOUT)
        else
          addstr(line_text)
        end
        xpos += 1
    else
      # blank lines if there's < @menusize of results
      line_text = " "*cols
      addstr(line_text)
      xpos += 1
    end 
  end

  status("Fetching more results, try again.", :failure) if @loading && @torrents[@offset + 1].nil?;
end

#move(cursor, increment) ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 133

def move(cursor, increment)
  if increment < 0 # negative, retreat!
    if cursor == 1
      if @offset == 0
        cursor = 1
      else
        prev_page
        cursor = menusize
      end
    else
      cursor = cursor + increment
    end
  else # non-negative, advance!
    if cursor == menusize
      next_page
      cursor = 1
    else
      cursor = cursor + increment
    end
  end
end

#next_page ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 187

def next_page
  status("Ready.")
  unless @page + 1 > @num_pages && @loading == false
    @page += 1
  end
  @offset = (page - 1) * @menusize;
end

#open(choice) ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 175

def open(choice)
  link = choice.class == Fixnum ? @torrents[@offset + choice - 1].info.to_s : choice;
  if RbConfig::CONFIG['host_os'] =~ /mswin|mingw|cygwin/ then
      system("start #{link}")
  elsif RbConfig::CONFIG['host_os'] =~ /darwin/ then
      system("open '#{link}'", [:out, :err]=>'/dev/null')
  elsif RbConfig::CONFIG['host_os'] =~ /linux/ then
      system("xdg-open '#{link}'", [:out, :err]=>'/dev/null')
  end
  status("Opened '#{link}'", :success)
end

#prev_page ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 195

def prev_page
  unless @page - 1 < 1
    @page += -1
  end
  @offset = (@page - 1) * @menusize;
end

#resize_handler(cursor) ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 202

def resize_handler(cursor)
  @menusize = lines - 4
  menu(cursor)
  refresh
end

#start(choice) ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 170

def start(choice)
  path = self.get(choice);
  self.open(path) if path != nil;
end

#status(text = nil, type = nil) ⇒ Object 



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# File 'lib/nyaa/ui.rb', line 75

def status(text = nil, type = nil)
  @status[:text] = text if text
  @status[:type] = type

  case @status[:type]
  when :success then profile = 8
  when :failure then profile = 9
  else profile = 1
  end

  status_text = sprintf " Status: %-s", @status[:text]
  attrset(color_pair(profile))
  setpos(lines-3,0)
  addstr(sprintf "%-#{cols}s", status_text)
  refresh
end