Module: Client

Included in:
NaviClient
Defined in:
lib/client.rb

Instance Method Summary collapse

Instance Method Details

#idle_loop(imap, search_condition, folder, server, username, password) ⇒ Object

idle_loop

check for any further mail with “real-time” responsiveness. retrieve any mail from a folder, following specified search condition for any mail retrieved call a specified block



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# File 'lib/client.rb', line 102

def idle_loop(imap, search_condition, folder, server, username, password)

  @logger.info "\nwaiting new mails (IDLE loop)..."

  loop do
    begin
      imap.select folder
      imap.idle do |resp|

        # You'll get all the things from the server. For new emails (EXISTS)
        if resp.kind_of?(Net::IMAP::UntaggedResponse) and resp.name == "EXISTS"

          @logger.debug resp.inspect if @debug
          # Got something. Send DONE. This breaks you out of the blocking call
          imap.idle_done
        end
      end

      # We're out, which means there are some emails ready for us.
      # Go do a search for UNSEEN and fetch them.
      retrieve_emails(imap, search_condition, folder) { |mail| process_email mail }
      @logger.debug "Process Completed." if @debug

    rescue SignalException => e
      # http://stackoverflow.com/questions/2089421/capturing-ctrl-c-in-ruby
      @logger.info "Signal received at #{time_now}: #{e.class}. #{e.message}"
      shutdown imap

    rescue Net::IMAP::Error => e
      @logger.error "Net::IMAP::Error at #{time_now}: #{e.class}. #{e.message}"

      # timeout ? reopen connection
      imap = imap_connection(server, username, password) #if e.message == 'connection closed'
      @logger.info "reconnected to server: #{server}"

    rescue Exception => e
      @logger.error "Something went wrong at #{time_now}: #{e.class}. #{e.message}"

      imap = imap_connection(server, username, password)
      @logger.info "reconnected to server: #{server}"
    end
  end
end

#imap_connection(server, username, password) ⇒ Object

imap_connection

connect the app with imap server



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# File 'lib/client.rb', line 27

def imap_connection(server, username, password)
  # connect to IMAP server
  imap = Net::IMAP.new server, ssl: true, certs: nil, verify: false

  Net::IMAP.debug = @net_imap_debug

  # http://ruby-doc.org/stdlib-2.1.5/libdoc/net/imap/rdoc/Net/IMAP.html#method-i-capability
  capabilities = imap.capability

  @logger.debug("imap capabilities: #{capabilities.join(',')}") if @debug

  unless capabilities.include? "IDLE"
    @logger.info "'IDLE' IMAP capability not available in server: #{server}"
    imap.disconnect
    exit
  end

  # login
  imap. username, password

  # return IMAP connection handler
  imap
end

#logger ⇒ Object 



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# File 'lib/client.rb', line 2

def logger
  @logger
end

#login ⇒ Object

login

login to the navi-cloud and get the authentication token



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# File 'lib/client.rb', line 11

def 
  provider_url = "http://localhost:3008/oauth/token"
  @token = HTTParty.post(provider_url,
                body: {
                  client_id: config["uid"], # get from sso_web application
                  client_secret: config["secret_key"],
                  grant_type: "client_credentials"
                }
               )['access_token']
end

#process_email(mail, start, last) ⇒ Object 



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# File 'lib/client.rb', line 146

def process_email(mail, start, last)
  meta = Hash.new
  custom_uid = (Time.now.to_f * 1000).to_s + "_" + mail.__id__.to_s

  meta["from"] = mail.from.first
  meta["to"] = mail.to.join(";") unless mail.to.nil?
  meta["cc"] = mail.cc.join(";") unless mail.cc.nil?
  meta["subject"] = mail.subject
  meta["date"] = mail.date.to_s

  if mail.multipart?
    for i in 0...mail.parts.length
      m = @local_flag  ? download_local(mail, custom_uid) : download_s3(mail, custom_uid)
      meta.merge!(m) unless m.nil?
    end
  else
    m = @local_flag ? download_local(mail, custom_uid) : download_s3(mail, custom_uid)
    meta.merge!(m) unless m.nil?
  end

  meta_file_path = save(meta, "meta/#{custom_uid}")
  pid = Process.spawn(@cmd+" -f=#{meta_file_path} -t=#{@token}")

  HTTPService::NaviAI.start(start, last)
end

#retrieve_emails(imap, search_condition, folder, &process_email_block) ⇒ Object

retrieve_emails

retrieve any mail from a folder, followin specified serach condition for any mail retrieved call a specified block



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# File 'lib/client.rb', line 57

def retrieve_emails(imap, search_condition, folder, &process_email_block)

  # select folder
  imap.select folder

  message_ids = imap.search(search_condition)

  if @debug
    if message_ids.empty?
      @logger.debug "\nno messages found.\n"
      return
    else
      @logger.debug "\nProcessing #{message_ids.count} mails.\n"
    end
  end

  message_ids.each_with_index do |message_id, i|
    # fetch all the email contents
    data = imap.fetch(message_id, "RFC822")

    data.each do |d|
      msg = d.attr['RFC822']
      # instantiate a Mail object to avoid further IMAP parameters nightmares
      mail = Mail.read_from_string msg

      # call the block with mail object as param
      start = (i == 0)
      last = (i == message_ids-1)
      process_email_block.call mail, start, last

      # mark as read
      if @mark_as_read
        imap.store(message_id, "+FLAGS", [:Seen])
      end
    end
  end
end