116 lines
3.7 KiB
Ruby
116 lines
3.7 KiB
Ruby
#
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# Rake tasks for receiving article updates by email.
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#
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# Mail setup is heavily inspired by Foodsoft's reply-by-mail feature for messages
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# @see https://github.com/foodcoops/foodsoft/blob/master/lib/foodsoft_mail_receiver.rb
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#
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require "mail"
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require "midi-smtp-server"
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class ReplyEmailSmtpServer < MidiSmtpServer::Smtpd
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def start
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super
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@from = nil
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@supplier = nil
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end
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private
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def on_mail_from_event(ctx, from)
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@from = from
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end
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def on_rcpt_to_event(ctx, rcpt_to)
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recipient = rcpt_to.gsub(/\A\s*<\s*(.*)\s*>\s*\z/, '\1')
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@supplier = find_supplier(recipient)
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rcpt_to
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rescue => error
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logger.info("Can not accept mail for '#{rcpt_to}': #{error}")
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raise MidiSmtpServer::Smtpd550Exception
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end
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def on_message_data_event(ctx)
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handle_mail(ctx[:message][:data])
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end
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def find_supplier(recipient)
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m = /\A#{Regexp.escape(ENV['MAILER_PREFIX'])}(?<supplier_id>\d+)\.(?<hash>\w+)(@(?<hostname>.*))?/.match(recipient)
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raise "recipient is missing or has an invalid format" if m.nil?
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supplier = Supplier.mail_sync.find_by_id(m[:supplier_id])
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raise "supplier id #{m[:supplier_id]} could not be found" if supplier.nil?
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hash = supplier.articles_mail_hash
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hash.casecmp(m[:hash]) == 0 or raise "hash '#{m[:hash]}' does not match expectations for supplier '#{supplier.name}'"
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supplier
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end
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def handle_mail(data)
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message = Mail.read_from_string(data)
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# message checks
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if @supplier.mail_from.present?
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m, s = message.from, @supplier.mail_from
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m.any? {|n| n.include?(s) } or raise "Expected to find '#{s}' in from address '#{m.join(', ')}' for supplier #{@supplier.name}"
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end
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if @supplier.mail_subject.present?
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m, s = message.subject, @supplier.mail_subject
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m.downcase.include?(s.downcase) or raise "Expected to find '#{s}' in subject '#{m}' for supplier #{@supplier.name}"
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end
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# get attachment
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filename = nil
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message.attachments.each do |part|
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# @todo perhaps get heuristic from article import filters?
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if part.filename.match(/\.(xls|xlsx|ods|sxc|csv|tsv|xml)$/i)
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FileUtils.mkdir_p(@supplier.mail_path)
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filename = "#{message.date.strftime '%Y%m%d'}_#{part.filename.gsub(/[^-a-z0-9_\.]+/i, '_')}"
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filename = @supplier.mail_path.join(filename)
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File.open(filename, 'w+b') { |f| f.write part.body.decoded }
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end
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end
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raise "No spreadsheet attachment found" unless filename.present?
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# import!
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outlisted_counter, new_counter, updated_counter, invalid_articles =
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@supplier.update_articles_from_file(File.new(filename), type: @supplier.mail_type)
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msg = "Handled articles update email for #{@supplier.name}: "
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msg += "#{new_counter} new, #{updated_counter} updated, #{outlisted_counter} outlisted, #{invalid_articles.size} invalid"
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invalid_articles.map do |article|
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msg += "\n* invalid article '#{article.name}'"
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article.errors.each do |attr, errmsg|
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errmsg.split("\n").each do |l|
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msg += "\n - #{': ' unless attr.blank?}" + l
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end
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end
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end
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logger.info(msg)
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end
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end
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namespace :mail do
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desc "Parse incoming email on stdin (options: RECIPIENT=1.a1b2c3d3e5)"
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task parse_reply_email: :environment do
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hande_mail(ENV['RECIPIENT'], STDIN.read)
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end
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desc "Start STMP server for incoming email (options: SMTP_SERVER_PORT=2525, SMTP_SERVER_HOST=127.0.0.1)"
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task :smtp_server => :environment do
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port = (ENV['SMTP_SERVER_PORT'] || 2525).to_i
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host = ENV['SMTP_SERVER_HOST'] || '127.0.0.1'
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rake_say "Started SMTP server for incoming email on #{host}:#{port}."
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server = ReplyEmailSmtpServer.new(port, host)
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server.start
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server.join
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end
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end
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# Helper
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def rake_say(message)
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puts message unless Rake.application.options.silent
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end
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