Pretty-print Adium transcripts from the terminal. Nice to pipe to `pbcopy`

gistfile1.rb

#!/usr/bin/env ruby

require "nokogiri"
require "time"

module Purple
  DIR = File.expand_path("~/Library/Application\ Support/Adium\ 2.0/Users/Default/Logs")

  def self.transcripts(buddy, which=-1)
    files = Dir.glob(File.join(DIR, "*/#{buddy}/**/*"))
      .select { |file| File.file?(file) }
      .sort_by { |file| File.basename(file) }

    files = files[which] unless which == :all

    Array(files).map { |file| Nokogiri(File.read(file)) / "message" }.flatten
  end

  class Transcript
    def initialize(messages)
      @messages = messages
    end

    def pretty_print(out=$stdout)
      @messages.each do |message|
        out.print timestamp(message), " "
        out.print nickname(message), " "
        out.puts  message.inner_text
      end
    end

    def max_nickname_size
      @max_nickname_size ||= @messages.map {|m| (m["alias"] || m["sender"]).size }.max
    end

    def nickname(message)
      "<#{message["alias"] || message["sender"]}>".rjust(max_nickname_size + 2)
    end

    def timestamp(message)
      "[" + Time.parse(message["time"]).strftime("%H:%M:%S") + "]"
    end
  end
end

if $0 == __FILE__
  banner =<<-HELP
Usage: #{File.basename($0)} <buddy_name>

Display a nicely formatted Adium chat transcript to STDOUT. For example:

#{File.basename($0)} john.doe@gmail.com
#{File.basename($0)} someone@me.com
#{File.basename($0)} some_aim_handle

This will get the latest (or currently active) chat transcript for the selected
buddy.
HELP

  abort banner if ARGV.empty?

  buddy = ARGV.last

  n = if ARGV.include?("--all")
    :all
  else
    ARGV.detect { |k| k =~ /-(\d+)/ } && $1 || -1
  end

  files = Purple.transcripts(buddy, n)
  abort "#{buddy} has no transcripts\n\n#{banner}" if files.nil? || files.empty?

  Purple::Transcript.new(files).pretty_print
end