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: friendsmegplus.rb
    path of file: ./repos/discourse/script/import_scripts
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require File.expand_path(File.dirname(__FILE__) + "/base.rb")

require "csv"

# Importer for Friends+Me Google+ Exporter (F+MG+E) output.
#
# Takes the full path (absolute or relative) to
# * each of the F+MG+E JSON export files you want to import
# * the F+MG+E google-plus-image-list.csv file,
# * a categories.json file you write to describe how the Google+
#   categories map to Discourse categories, subcategories, and tags.
#
# You can provide all the F+MG+E JSON export files in a single import
# run.  This will be the fastest way to do the entire import if you
# have enough memory and disk space.  It will work just as well to
# import each F+MG+E JSON export file separately.  This might be
# valuable if you have memory or space limitations, as the memory to
# hold all the data from the F+MG+E JSON export files is one of the
# key resources used by this script.
#
# Create an initial empty ("{}") categories.json file, and the import
# script will write a .new file for you to fill in the details.
# You will probably want to use jq to reformat the .new file before
# trying to edit it.  `jq . categories.json.ne
    
  def formatted_message_fragment(fragment, post, urls_seen)
    # markdown does not nest reliably the same as either G+'s markup or what users intended in G+, so generate HTML codes
    # this method uses return to make sure it doesn't fall through accidentally
    if fragment[0] == 0
      # Random zero-width join characters break the output; in particular, they are
      # common after plus-references and break @name recognition. Just get rid of them.
      # Also deal with 0x80 (really‽) and non-breaking spaces
      text = fragment[1].gsub(/(\u200d|\u0080)/, "").gsub(/\u00a0/, " ")
      if fragment[2].nil?
        text
      else
        text = "<i>#{text}</i>" if fragment[2]["italic"].present?
        text = "<b>#{text}</b>" if fragment[2]["bold"].present?
        if fragment[2]["strikethrough"].present?
          # s more likely than del to represent user intent?
          text = "<s>#{text}</s>"
        end
        text
      end
    elsif fragment[0] == 1
      "\n"
    elsif fragment[0] == 2
      urls_seen.add(fragment[2])
      formatted_link_text(fragment[2], fragment[1])
    elsif fragment[0] == 3
      # reference to a user
      return "@#{@usermap[fragment[2].to_s]}" if @usermap.include?(fragment[2].to_s)
      if fragment[2].nil?
        # deleted G+ users show up with a null ID
        return "<b>+#{fragment[1]}</b>"
      end