Module: Maildir::Keywords

Defined in:
lib/maildir/keywords.rb

Defined Under Namespace

Modules: MessageExtension

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/maildir/keywords.rb', line 6

def self.included(base)
  Maildir::Message.send(:include, MessageExtension)
end

Instance Method Details

#keyword_dir ⇒ Object 



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# File 'lib/maildir/keywords.rb', line 10

def keyword_dir
  @keyword_dir ||= File.join(path, 'courierimapkeywords')
  Dir.mkdir(@keyword_dir) unless File.directory?(@keyword_dir)
  return @keyword_dir
end

#keywords(key) ⇒ Object 



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# File 'lib/maildir/keywords.rb', line 85

def keywords(key)
  read_keywords unless @keywords
  @keywords[key] || []
end

#read_keywords ⇒ Object

process contents of courierimapkeywords/ directory as described in README.imapkeywords



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# File 'lib/maildir/keywords.rb', line 17

def read_keywords
  messages = (list(:cur) + list(:new)).inject({}) { |m, msg| m[msg.unique_name] = msg ; m }
  t = Time.now.to_i / 300
  keywords = []
  state = :head
  # process :list
  list_file = File.join(keyword_dir, ':list')
  File.open(list_file).each_line do |line|
    line.strip!
    if state == :head
      if line.empty?
        state = :messages
        next
      end
      keywords << line
    else
      key, ids = line.split(':')
      if msg = messages[key]
        msg.set_keywords(ids.split(/\s/).map {|id| keywords[id.to_i - 1] })
      end
    end
  end if File.exist?(list_file)
  # collect keyword files
  keyword_files = (Dir.entries(keyword_dir) - %w(. .. :list)).inject({}) do |keyword_files, file|
    if file =~ /^\.(\d+)\.(.*)$/
      n = $1
      key = $2
    else
      n = t + 1
      key = file
      FileUtils.mv(File.join(keyword_dir, file), File.join(keyword_dir, ".#{n}.#{key}"))
    end
    if msg = messages[key]
      (keyword_files[key] ||= []) << [n, key]
    else # message doesn't exist
      fname = File.join(keyword_dir, file)
      if File.stat(fname).ctime < (Time.now - (15 * 60))
        File.unlink(fname)
      end
    end
    next(keyword_files)
  end
  # process keyword files
  keyword_files.each_pair do |key, files|
    files.sort! { |a, b| a[0] <=> b[0] }
    files[0..-2].each { |f| File.unlink(File.join(keyword_dir, ".#{f.join('.')}")) } if files.last[0] < t
    msg = messages[key]
    file = (File.exist?(File.join(keyword_dir, files.last[1])) ? files.last[1] : ".#{files.last.join('.')}")
    current_keywords = File.read(File.join(keyword_dir, file)).split(/\s+/)
    msg.set_keywords(current_keywords)
    if (add = (current_keywords - keywords)).any?
      keywords += add
    end
  end
  # rebuild :list
  @keywords = {}
  tmp_file = File.join(path, 'tmp', ':list')
  File.open(tmp_file, 'w') { |f|
    f.write(keywords.join("\n")+"\n\n")
    messages.each_pair do |key, msg|
      next unless msg.keywords
      f.puts([key, msg.keywords.map{|kw| keywords.index(kw) + 1 }.sort.join(' ')].join(':'))
      @keywords[key] = msg.keywords
    end
  }
  FileUtils.mv(tmp_file, list_file)
end