Move SMTP server from messages plugin into core

Gemfile

@@ -48,6 +48,7 @@ gem 'roo-xls'
 gem 'spreadsheet'
 gem 'gaffe'
 gem 'ruby-filemagic'
+gem 'midi-smtp-server'
 
 # we use the git version of acts_as_versioned, and need to include it in this Gemfile
 gem 'acts_as_versioned', git: 'https://github.com/technoweenie/acts_as_versioned.git'

Gemfile.lock

@@ -24,9 +24,7 @@ PATH
     foodsoft_messages (0.0.1)
       base32
       deface (~> 1.0)
-      gserver
       mail
-      mini-smtp-server
       rails
 
 PATH
@@ -172,7 +170,6 @@ GEM
     git-version-bump (0.15.1)
     globalid (0.3.7)
       activesupport (>= 4.1.0)
-    gserver (0.0.1)
     haml (4.0.7)
       tilt
     haml-rails (0.9.0)
@@ -240,10 +237,10 @@ GEM
       rack-contrib (~> 1.1)
       railties (>= 3.0.0, < 5.1.0)
     method_source (0.8.2)
+    midi-smtp-server (2.1.2)
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini-smtp-server (0.0.2)
     mini_portile2 (2.2.0)
     minitest (5.10.1)
     mono_logger (1.1.0)
@@ -518,6 +515,7 @@ DEPENDENCIES
   localize_input!
   mailcatcher
   meta_request
+  midi-smtp-server
   mysql2
   prawn
   prawn-table

lib/foodsoft_mail_receiver.rb

@@ -0,0 +1,45 @@
+require 'mail'
+require 'midi-smtp-server'
+
+class FoodsoftMailReceiver < MidiSmtpServer::Smtpd
+
+  @@registered_classes = Set.new
+
+  def self.register(klass)
+    @@registered_classes.add klass
+  end
+
+  def self.received(recipient, data)
+    m = /(?<foodcoop>[^@\.]+)\.(?<address>[^@]+)(@(?<hostname>[^@]+))?/.match recipient
+    raise "recipient is missing or has an invalid format" if m.nil?
+    raise "Foodcoop '#{m[:foodcoop]}' could not be found" unless FoodsoftConfig.foodcoops.include? m[:foodcoop]
+    FoodsoftConfig.select_multifoodcoop m[:foodcoop]
+
+    @@registered_classes.each do |klass|
+      klass_m = klass.regexp.match(m[:address])
+      return klass.new.received klass_m, data if klass_m
+    end
+
+    raise "invalid format for recipient"
+  end
+
+  def start
+    super
+  end
+
+  private
+
+  def on_message_data_event(ctx)
+    puts ctx[:envelope][:to]
+    ctx[:envelope][:to].each do |to|
+      begin
+        m = /<(?<recipient>[^<>]+)>/.match(to)
+        raise "invalid format for RCPT TO" if m.nil?
+        FoodsoftMailReceiver.received(m[:recipient], ctx[:message][:data])
+      rescue => error
+        Rails.logger.warn "Can't deliver mail to #{to}: #{error.message}"
+      end
+    end
+  end
+
+end

lib/tasks/foodsoft.rake

@@ -43,6 +43,21 @@ namespace :foodsoft do
       rake_say "created until #{created_until}"
     end
   end
+
+  desc "Parse incoming email on stdin (options: RECIPIENT=foodcoop.handling)"
+  task :parse_reply_email => :environment do
+    FoodsoftMailReceiver.received ENV['RECIPIENT'], STDIN.read
+  end
+
+  desc "Start STMP server for incoming email (options: SMTP_SERVER_PORT=2525, SMTP_SERVER_HOST=0.0.0.0)"
+  task :reply_email_smtp_server => :environment do
+    port = ENV['SMTP_SERVER_PORT'].present? ? ENV['SMTP_SERVER_PORT'].to_i : 2525
+    host = ENV['SMTP_SERVER_HOST']
+    rake_say "Started SMTP server for incoming email on port #{port}."
+    server = FoodsoftMailReceiver.new port, host
+    server.start
+    server.join
+  end
 end
 
 # Helper

plugins/messages/app/mail_receivers/messages_mail_receiver.rb

@@ -0,0 +1,50 @@
+class MessagesMailReceiver
+
+  def self.regexp
+    /(?<message_id>\d+)\.(?<user_id>\d+)\.(?<hash>\w+)/
+  end
+
+  def received(match, data)
+    original_message = Message.find_by_id(match[:message_id])
+    user = User.find_by_id(match[:user_id])
+
+    raise "Message could not be found" if original_message.nil?
+    raise "User could not be found" if user.nil?
+
+    hash = original_message.mail_hash_for_user user
+    raise "Hash does not match expectations" unless hash.casecmp(match[:hash]) == 0
+
+    mail = Mail.new data
+
+    mail_part = nil
+    if mail.multipart?
+      for part in mail.parts
+        mail_part = part if MIME::Type.simplified(part.content_type) == "text/plain"
+      end
+    else
+      mail_part = mail
+    end
+
+    body = mail_part.body.decoded
+    unless mail_part.content_type_parameters.nil?
+      body = body.force_encoding mail_part.content_type_parameters[:charset]
+    end
+
+    message = user.send_messages.new body: body,
+      group: original_message.group,
+      private: original_message.private,
+      received_email: received_email,
+      subject: mail.subject.gsub("[#{FoodsoftConfig[:name]}] ", "")
+    if original_message.reply_to
+      message.reply_to_message = original_message.reply_to_message
+    else
+      message.reply_to_message = original_message
+    end
+    message.add_recipients original_message.recipients
+    message.add_recipients [original_message.sender]
+
+    message.save!
+    Resque.enqueue(MessageNotifier, FoodsoftConfig.scope, "message_deliver", message.id)
+  end
+
+end

plugins/messages/foodsoft_messages.gemspec

@@ -20,8 +20,6 @@ Gem::Specification.new do |s|
   s.add_dependency "base32"
   s.add_dependency "deface", "~> 1.0"
   s.add_dependency "mail"
-  s.add_dependency "mini-smtp-server"
-  s.add_dependency "gserver"
 
   s.add_development_dependency "sqlite3"
 end

plugins/messages/lib/foodsoft_messages.rb

@@ -1,4 +1,5 @@
 require "foodsoft_messages/engine"
+require "foodsoft_messages/mail_receiver"
 require "foodsoft_messages/user_link"
 require "deface"
 

plugins/messages/lib/foodsoft_messages/mail_receiver.rb

@@ -0,0 +1,3 @@
+ActiveSupport.on_load(:after_initialize) do
+  FoodsoftMailReceiver.register MessagesMailReceiver
+end