Class: Vmail::ImapClient

Inherits:
Object
  • Object
show all
Defined in:
lib/vmail/imap_client.rb

Constant Summary collapse

MailboxAliases = 
{ 'sent' => '[Gmail]/Sent Mail',
  'all' => '[Gmail]/All Mail',
  'starred' => '[Gmail]/Starred',
  'important' => '[Gmail]/Important',
  'drafts' => '[Gmail]/Drafts',
  'spam' => '[Gmail]/Spam',
  'trash' => '[Gmail]/Trash'
}
UNITS = 
[:b, :kb, :mb, :gb].freeze
FLAGMAP = 
{:Flagged => '[*]'}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ ImapClient

Returns a new instance of ImapClient.



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# File 'lib/vmail/imap_client.rb', line 22

def initialize(config)
  @username, @password = config['username'], config['password']
  @name = config['name']
  @signature = config['signature']
  @mailbox = nil
  @logger = Logger.new(config['logfile'] || STDERR)
  @logger.level = Logger::DEBUG
  @current_mail = nil
  @current_uid = nil
end

Class Method Details

.daemon(config) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 567

def self.daemon(config)
  $gmail = self.start(config)
  DRb.start_service(nil, $gmail)
  uri = DRb.uri
  puts "starting gmail service at #{uri}"
  uri
end

.start(config) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 561

def self.start(config)
  imap_client  = Vmail::ImapClient.new config
  imap_client.open
  imap_client
end

Instance Method Details

#add_more_message_line(res, uids) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 228

def add_more_message_line(res, uids)
  return res if uids.empty?
  start_index = @all_uids.index(uids[0])
  if start_index > 0
    remaining = start_index 
    res = "> Load #{[100, remaining].min} more messages. #{remaining} remaining.\n" + res
  end
  res 
end

#address_to_string(x) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 396

def address_to_string(x)
  x.name ? "#{x.name} <#{x.mailbox}@#{x.host}>" : "#{x.mailbox}@#{x.host}"
end

#append_to_file(file, uid_set) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 338

def append_to_file(file, uid_set)
  if uid_set.is_a?(String)
    uid_set = uid_set.split(",").map(&:to_i)
  end
  log "append messages to file: #{file}"
  uid_set.each do |uid|
    message = show_message(uid)
    divider = "#{'=' * 39}\n"
    File.open(file, 'a') {|f| f.puts(divider + message + "\n\n")}
    log "appended uid #{uid}"
  end
  "printed #{uid_set.size} message#{uid_set.size == 1 ? '' : 's'} to #{file.strip}"
end

#close ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 38

def close
  log "closing connection"
  @imap.close rescue Net::IMAP::BadResponseError
  @imap.disconnect
end

#copy_to(uid_set, mailbox) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 318

def copy_to(uid_set, mailbox)
  if MailboxAliases[mailbox]
    mailbox = MailboxAliases[mailbox]
  end
  create_if_necessary mailbox
  log "copy #{uid_set.inspect} #{mailbox}"
  if uid_set.is_a?(String)
    uid_set = uid_set.split(",").map(&:to_i)
  end
  log @imap.uid_copy(uid_set, mailbox)
end

#create_if_necessary(mailbox) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 330

def create_if_necessary(mailbox)
  if !@mailboxes.include?(mailbox) 
    log "creating mailbox #{mailbox}"
    log @imap.create(mailbox) 
    @mailboxes = nil # force reload next fime list_mailboxes() called
  end
end

#deliver(text) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 412

def deliver(text)
  # parse the text. The headers are yaml. The rest is text body.
  require 'net/smtp'
  reconnect_if_necessary(4) do 
    # this is just to prime the IMAP connection
    # It's necessary for some reason.
    log "priming connection for delivering"
    res = @imap.uid_fetch(@all_uids[-1], ["ENVELOPE"])
    if res.nil?
      raise IOError, "IMAP connection seems broken"
    end
  end 
  mail = new_mail_from_input(text)
  mail.delivery_method(*smtp_settings)
  log mail.deliver!
  "message '#{mail.subject}' sent"
end

#fetch_headers(uid_set) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 78

def fetch_headers(uid_set)
  if uid_set.is_a?(String)
    uid_set = uid_set.split(",").map(&:to_i)
  elsif uid_set.is_a?(Integer)
    uid_set = [uid_set]
  end
  max_uid = uid_set.max
  log "fetch headers for #{uid_set.inspect}"
  if uid_set.empty?
    log "empty set"
    return ""
  end
  results = reconnect_if_necessary do 
    @imap.uid_fetch(uid_set, ["FLAGS", "ENVELOPE", "RFC822.SIZE" ])
  end
  log "extracting headers"
  lines = results.
    sort_by {|x| 
      begin
        Time.parse(x.attr['ENVELOPE'].date) 
      rescue ArgumentError
        Time.now
      end
    }.
    map {|x| format_header(x, max_uid)}
  log "returning result" 
  return lines.join("\n")
end

#flag(uid_set, action, flg) ⇒ Object

uid_set is a string comming from the vim client action is -FLAGS or +FLAGS



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# File 'lib/vmail/imap_client.rb', line 278

def flag(uid_set, action, flg)
  if uid_set.is_a?(String)
    uid_set = uid_set.split(",").map(&:to_i)
  end
  # #<struct Net::IMAP::FetchData seqno=17423, attr={"FLAGS"=>[:Seen, "Flagged"], "UID"=>83113}>
  log "flag #{uid_set} #{flg} #{action}"
  if flg == 'Deleted'
    # for delete, do in a separate thread because deletions are slow
    Thread.new do 
      unless @mailbox == '[Gmail]/Trash'
        @imap.uid_copy(uid_set, "[Gmail]/Trash")
      end
      res = @imap.uid_store(uid_set, action, [flg.to_sym])
    end
    uid_set.each { |uid| @all_uids.delete(uid) }
  elsif flg == '[Gmail]/Spam'
    @imap.uid_copy(uid_set, "[Gmail]/Spam")
    res = @imap.uid_store(uid_set, action, [:Deleted])
    "#{uid} deleted"
  else
    log "Flagging"
    res = @imap.uid_store(uid_set, action, [flg.to_sym])
    # log res.inspect
    fetch_headers(uid_set)
  end
end

#format_flags(flags) ⇒ Object

flags is an array like [:Flagged, :Seen]



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# File 'lib/vmail/imap_client.rb', line 173

def format_flags(flags)
  flags = flags.map {|flag| FLAGMAP[flag] || flag}
  if flags.delete(:Seen).nil?
    flags << '[+]' # unread
  end
  flags.join('')
end

#format_header(fetch_data, max_uid = nil) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 107

def format_header(fetch_data, max_uid=nil)
  uid = fetch_data.attr["UID"]
  envelope = fetch_data.attr["ENVELOPE"]
  size = fetch_data.attr["RFC822.SIZE"]
  flags = fetch_data.attr["FLAGS"]
  address_struct = if @mailbox == '[Gmail]/Sent Mail' 
                     structs = envelope.to || envelope.cc
                     structs.nil? ? nil : structs.first 
                   else
                     envelope.from.first
                   end
  address = if address_struct.nil?
              "unknown"
            elsif address_struct.name
              "#{Mail::Encodings.unquote_and_convert_to(address_struct.name, 'UTF-8')} <#{[address_struct.mailbox, address_struct.host].join('@')}>"
            else
              [address_struct.mailbox, address_struct.host].join('@') 
            end
  if @mailbox == '[Gmail]/Sent Mail' && envelope.to && envelope.cc
    total_recips = (envelope.to + envelope.cc).size
    address += " + #{total_recips - 1}"
  end
  date = begin 
           Time.parse(envelope.date).localtime
         rescue ArgumentError
           Time.now
         end

  date_formatted = if date.year != Time.now.year
                     date.strftime "%b %d %Y" rescue envelope.date.to_s 
                   else 
                     date.strftime "%b %d %I:%M%P" rescue envelope.date.to_s 
                   end
  subject = envelope.subject || ''
  subject = Mail::Encodings.unquote_and_convert_to(subject, 'UTF-8')
  flags = format_flags(flags)
  first_col_width = max_uid.to_s.length 
  mid_width = @width - (first_col_width + 33)
  address_col_width = (mid_width * 0.3).ceil
  subject_col_width = (mid_width * 0.7).floor
  [uid.to_s.col(first_col_width), 
    (date_formatted || '').col(14),
    address.col(address_col_width),
    subject.col(subject_col_width),
    number_to_human_size(size).rcol(6),
    flags.rcol(7)].join(' ')
end

#format_headers(hash) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 361

def format_headers(hash)
  lines = []
  hash.each_pair do |key, value|
    if value.is_a?(Array)
      value = value.join(", ")
    end
    lines << "#{key.gsub("_", '-')}: #{value}"
  end
  lines.join("\n")
end

#format_parts_info(parts) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 269

def format_parts_info(parts)
  lines = parts.select {|part| part !~ %r{text/plain}}
  if lines.size > 0
    "\n#{lines.join("\n")}"
  end
end

#forward_template(uid) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 405

def forward_template(uid)
  original_body = show_message(uid, false, true)
  new_message_template + 
    "\n---------- Forwarded message ----------\n" +
    original_body + signature
end

#handle_error(error) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 543

def handle_error(error)
  log error
end

#list_mailboxes ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 68

def list_mailboxes
  @mailboxes ||= (@imap.list("[Gmail]/", "%") + @imap.list("", "%")).
    select {|struct| struct.attr.none? {|a| a == :Noselect} }.
    map {|struct| struct.name}.
    map {|name| MailboxAliases.invert[name] || name}
  @mailboxes.delete("INBOX")
  @mailboxes.unshift("INBOX")
  @mailboxes.join("\n")
end

#log(string) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 539

def log(string)
  @logger.debug string
end

#more_messages(uid, limit = 100) ⇒ Object

gets 100 messages prior to uid



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# File 'lib/vmail/imap_client.rb', line 219

def more_messages(uid, limit=100)
  uid = uid.to_i
  x = [(@all_uids.index(uid) - limit), 0].max
  y = [@all_uids.index(uid) - 1, 0].max
  uids = @all_uids[x..y]
  res = fetch_headers(uids)
  add_more_message_line(res, uids)
end

#move_to(uid_set, mailbox) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 305

def move_to(uid_set, mailbox)
  if MailboxAliases[mailbox]
    mailbox = MailboxAliases[mailbox]
  end
  create_if_necessary mailbox
  log "move_to #{uid_set.inspect} #{mailbox}"
  if uid_set.is_a?(String)
    uid_set = uid_set.split(",").map(&:to_i)
  end
  log @imap.uid_copy(uid_set, mailbox)
  log @imap.uid_store(uid_set, '+FLAGS', [:Deleted])
end

#new_mail_from_input(text) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 447

def new_mail_from_input(text)
  require 'mail'
  mail = Mail.new
  raw_headers, raw_body = *text.split(/\n\s*\n/, 2)
  headers = {}
  raw_headers.split("\n").each do |line|
    key, value = *line.split(/:\s*/, 2)
    headers[key] = value
  end
  log "headers: #{headers.inspect}"
  log "delivering: #{headers.inspect}"
  mail.from = headers['from'] || @username
  mail.to = headers['to'] #.split(/,\s+/)
  mail.cc = headers['cc'] #&& headers['cc'].split(/,\s+/)
  mail.bcc = headers['bcc'] #&& headers['cc'].split(/,\s+/)
  mail.subject = headers['subject']
  mail.from ||= @username
  # attachments are added as a snippet of YAML after a blank line
  # after the headers, and followed by a blank line
  if (attachments = raw_body.split(/\n\s*\n/, 2)[0]) =~ /^attach(ment|ments)*:/
    # TODO
    files = YAML::load(attachments).values.flatten
    log "attach: #{files}"
    files.each do |file|
      if File.directory?(file)
        Dir.glob("#{file}/*").each {|f| mail.add_file(f) if File.size?(f)}
      else
        mail.add_file(file) if File.size?(file)
      end
    end
    mail.text_part do
      body raw_body.split(/\n\s*\n/, 2)[1]
    end

  else
    mail.text_part do
      body raw_body
    end
  end
  mail
end

#new_message_template ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 353

def new_message_template
  headers = {'from' => "#{@name} <#{@username}>",
    'to' => nil,
    'subject' => nil
  }
  format_headers(headers) + "\n\n"
end

#number_to_human_size(number) ⇒ Object

borrowed from ActionView/Helpers



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# File 'lib/vmail/imap_client.rb', line 158

def number_to_human_size(number)
  if number.to_i < 1024
    "#{number} b"
  else
    max_exp = UNITS.size - 1
    exponent = (Math.log(number) / Math.log(1024)).to_i # Convert to base 1024
    exponent = max_exp if exponent > max_exp # we need this to avoid overflow for the highest unit
    number  /= 1024 ** exponent
    unit = UNITS[exponent]
    "#{number} #{unit}"
  end
end

#open ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 33

def open
  @imap = Net::IMAP.new('imap.gmail.com', 993, true, nil, false)
  @imap.(@username, @password)
end

#open_html_part(uid) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 506

def open_html_part(uid)
  log "open_html_part #{uid}"
  log @current_mail.parts.inspect
  multipart = @current_mail.parts.detect {|part| part.multipart?}
  html_part = if multipart 
                multipart.parts.detect {|part| part.header["Content-Type"].to_s =~ /text\/html/}
              elsif ! @current_mail.parts.empty?
                @current_mail.parts.detect {|part| part.header["Content-Type"].to_s =~ /text\/html/}
              else
                @current_mail.body
              end
  return if html_part.nil?
  outfile = 'vmail-htmlpart.html'
  File.open(outfile, 'w') {|f| f.puts(html_part.decoded)}
  # client should handle opening the html file
  return outfile
end

#reconnect_if_necessary(timeout = 60, &block) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 547

def reconnect_if_necessary(timeout = 60, &block)
  # if this times out, we know the connection is stale while the user is
  # trying to update
  Timeout::timeout(timeout) do
    block.call
  end
rescue IOError, Errno::EADDRNOTAVAIL, Timeout::Error
  log "error: #{$!}"
  log "attempting to reconnect"
  log(revive_connection)
  # try just once
  block.call
end

#reply_template(uid, replyall = false) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 372

def reply_template(uid, replyall=false)
  log "sending reply template for #{uid}"
  fetch_data = @imap.uid_fetch(uid.to_i, ["FLAGS", "ENVELOPE", "RFC822"])[0]
  envelope = fetch_data.attr['ENVELOPE']
  recipient = [envelope.reply_to, envelope.from].flatten.map {|x| address_to_string(x)}[0]
  cc = [envelope.to, envelope.cc]
  cc = cc.flatten.compact.
    select {|x| @username !~ /#{x.mailbox}@#{x.host}/}.
    map {|x| address_to_string(x)}.join(", ")
  mail = Mail.new fetch_data.attr['RFC822']
  formatter = Vmail::MessageFormatter.new(mail)
  headers = formatter.extract_headers
  subject = headers['subject']
  if subject !~ /Re: /
    subject = "Re: #{subject}"
  end
  cc = replyall ? cc : nil
  date = headers['date'].is_a?(String) ? Time.parse(headers['date']) : headers['date']
  quote_header = "On #{date.strftime('%a, %b %d, %Y at %I:%M %p')}, #{recipient} wrote:\n\n"
  body = quote_header + formatter.process_body.gsub(/^(?=>)/, ">").gsub(/^(?!>)/, "> ")
  reply_headers = { 'from' => "#@name <#@username>", 'to' => recipient, 'cc' => cc, 'subject' => headers['subject']}
  format_headers(reply_headers) + "\n\n\n" + body + signature
end

#resume_draft ⇒ Object

TODO



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# File 'lib/vmail/imap_client.rb', line 440

def resume_draft
  # chop off top three lines (this is hackey, fix later)
  # text = text.split("\n")[3..-1].join("\n")
  # delete date: field
  # text = text.sub("^date:\s*$", "")
end

#revive_connection ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 61

def revive_connection
  log "reviving connection"
  open
  log "reselecting mailbox #@mailbox"
  @imap.select(@mailbox)
end

#save_attachments(dir) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 489

def save_attachments(dir)
  log "save_attachments #{dir}"
  if !@current_mail
    log "missing a current message"
  end
  return unless dir && @current_mail
  attachments = @current_mail.attachments
  `mkdir -p #{dir}`
  saved = attachments.map do |x|
    path = File.join(dir, x.filename)
    log "saving #{path}"
    File.open(path, 'wb') {|f| f.puts x.decoded}
    path
  end
  "saved:\n" + saved.map {|x| "- #{x}"}.join("\n")
end

#save_draft(text) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 430

def save_draft(text)
  mail = new_mail_from_input(text)
  log "saving draft"
  reconnect_if_necessary do 
    log "saving draft"
    log @imap.append("[Gmail]/Drafts", text.gsub(/\n/, "\r\n"), [:Seen], Time.now)
  end
end

#search(limit, *query) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 181

def search(limit, *query)
  log "uid_search limit: #{limit} query: #{@query.inspect}"
  limit = 25 if limit.to_s !~ /^\d+$/
  query = ['ALL'] if query.empty?
  @query = query.join(' ')
  log "uid_search #@query #{limit}"
  @all_uids = reconnect_if_necessary do
    @imap.uid_search(@query)
  end
  uids = @all_uids[-([limit.to_i, @all_uids.size].min)..-1] || []
  res = fetch_headers(uids)
  add_more_message_line(res, uids)
end

#select_mailbox(mailbox) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 44

def select_mailbox(mailbox)
  if MailboxAliases[mailbox]
    mailbox = MailboxAliases[mailbox]
  end
  if mailbox == @mailbox 
    return
  end
  log "selecting mailbox #{mailbox.inspect}"
  reconnect_if_necessary do 
    @imap.select(mailbox)
  end
  @mailbox = mailbox
  @all_uids = []
  @bad_uids = []
  return "OK"
end

#show_message(uid, raw = false, forwarded = false) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 238

def show_message(uid, raw=false, forwarded=false)
  uid = uid.to_i
  if forwarded
    return @current_message.split(/\n-{20,}\n/, 2)[1]
  end
  return @current_mail.to_s if raw 
  return @current_message if uid == @current_uid 
  log "fetching #{uid.inspect}" 
  fetch_data = reconnect_if_necessary do 
    @imap.uid_fetch(uid, ["FLAGS", "RFC822", "RFC822.SIZE"])[0]
  end
  res = fetch_data.attr["RFC822"]
  mail = Mail.new(res) 
  @current_uid = uid
  @current_mail = mail # used later to show raw message or extract attachments if any
  log "saving current mail with parts: #{@current_mail.parts.inspect}"
  formatter = Vmail::MessageFormatter.new(mail)
  out = formatter.process_body 
  size = fetch_data.attr["RFC822.SIZE"]
  @current_message = <<-EOF
#{@mailbox} #{uid} #{number_to_human_size size} #{format_parts_info(formatter.list_parts)}
---------------------------------------
#{format_headers(formatter.extract_headers)}

#{out}
EOF
rescue
  log "parsing error"
  "Error encountered parsing this message:\n#{$!}"
end

#signature ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 400

def signature
  return '' unless @signature
  "\n\n#@signature"
end

#smtp_settings ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 529

def smtp_settings
  [:smtp, {:address => "smtp.gmail.com",
  :port => 587,
  :domain => 'gmail.com',
  :user_name => @username,
  :password => @password,
  :authentication => 'plain',
  :enable_starttls_auto => true}]
end

#update ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 195

def update
  reconnect_if_necessary(4) do 
    # this is just to prime the IMAP connection
    # It's necessary for some reason.
    log "priming connection for update"
    res = @imap.uid_fetch(@all_uids[-1], ["ENVELOPE"])
    if res.nil?
      raise IOError, "IMAP connection seems broken"
    end
  end
  uids = reconnect_if_necessary { 
    log "uid_search #@query"
    @imap.uid_search(@query) 
  }
  new_uids = uids - @all_uids
  log "UPDATE: NEW UIDS: #{new_uids.inspect}"
  if !new_uids.empty?
    res = fetch_headers(new_uids)
    @all_uids = uids
    res
  end
end

#window_width=(width) ⇒ Object 



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# File 'lib/vmail/imap_client.rb', line 524

def window_width=(width)
  log "setting window width to #{width}"
  @width = width.to_i
end