You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: zerochan.rb
    path of file: ./repos/danbooru/app/logical/source/url
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class Source::URL::Zerochan < Source::URL
  attr_reader :full_image_url, :title, :size, :work_id, :filetype

  def self.match?(url)
    url.domain == "zerochan.net"
  end

  def parse
    case [domain, *path_segments]

    # https://s4.zerochan.net/600/24/13/90674.jpg
    # http://static.zerochan.net/full/24/13/90674.jpg
    in "zerochan.net", ("full" | /^\d+$/) => size, /\d{2}/ => first_subdir, /\d{2}/ => second_subdir, /(\d+)\.(jpg|png|gif)$/ => filename
      @work_id = $1
      @filetype = $2
      @full_image_url = "https://static.zerochan.net/full/#{first_subdir}/#{second_subdir}/#{filename}"

    # https://static.zerochan.net/Fullmetal.Alchemist.full.2831797.png
    # https://
    
  def parse
    case [domain, *path_segments]

    # https://s4.zerochan.net/600/24/13/90674.jpg
    # http://static.zerochan.net/full/24/13/90674.jpg
    in "zerochan.net", ("full" | /^\d+$/) => size, /\d{2}/ => first_subdir, /\d{2}/ => second_subdir, /(\d+)\.(jpg|png|gif)$/ => filename
      @work_id = $1
      @filetype = $2
      @full_image_url = "https://static.zerochan.net/full/#{first_subdir}/#{second_subdir}/#{filename}"

    # https://static.zerochan.net/Fullmetal.Alchemist.full.2831797.png
    # https://s1.zerochan.net/Cocoa.Cookie.600.2957938.jpg
    # http://s4.zerochan.net/Tachibana.Kanade.full.1432739.jpg
    # https://static.zerochan.net/THE.iDOLM%40STER.full.1262006.jpg  <- does not fall under \w
    # https://static.zerochan.net/Lancer.(Fate.stay.night).full.2600383.jpg  <- same as above
    in "zerochan.net", /^(.*?)\.(full|\d+)\.(\d+)\.(jpg|png|gif)$/ => filename
      @title = $1
      @size = $2
      @work_id = $3
      @filetype = $4

      @full_image_url = "https://static.zerochan.net/#{title}.full.#{work_id}.#{filetype}"

    # http://www.zerochan.net/full/1567893
    in "zerochan.net", "full", /^\d+$/ => work_id
      @work_id = work_id

    # http://www.zerochan.net/1567893
    # http://www.zerochan.net/1567893#full
    in "zerochan.net", /^(\d+)(?:#(?:full)?)?$/
      @work_id = $1

    else
      nil
    end
  end