1246 lines
44 KiB
Ruby
1246 lines
44 KiB
Ruby
# frozen_string_literal: true
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require "digest"
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module Email
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class Receiver
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# If you add a new error, you need to
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# * add it to Email::Processor#handle_failure()
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# * add text to server.en.yml (parent key: "emails.incoming.errors")
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class ProcessingError < StandardError; end
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class EmptyEmailError < ProcessingError; end
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class ScreenedEmailError < ProcessingError; end
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class UserNotFoundError < ProcessingError; end
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class AutoGeneratedEmailError < ProcessingError; end
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class BouncedEmailError < ProcessingError; end
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class NoBodyDetectedError < ProcessingError; end
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class NoSenderDetectedError < ProcessingError; end
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class FromReplyByAddressError < ProcessingError; end
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class InactiveUserError < ProcessingError; end
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class SilencedUserError < ProcessingError; end
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class BadDestinationAddress < ProcessingError; end
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class StrangersNotAllowedError < ProcessingError; end
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class ReplyNotAllowedError < ProcessingError; end
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class InsufficientTrustLevelError < ProcessingError; end
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class ReplyUserNotMatchingError < ProcessingError; end
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class TopicNotFoundError < ProcessingError; end
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class TopicClosedError < ProcessingError; end
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class InvalidPost < ProcessingError; end
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class TooShortPost < ProcessingError; end
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class InvalidPostAction < ProcessingError; end
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class UnsubscribeNotAllowed < ProcessingError; end
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class EmailNotAllowed < ProcessingError; end
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class OldDestinationError < ProcessingError; end
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class ReplyToDigestError < ProcessingError; end
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attr_reader :incoming_email
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attr_reader :raw_email
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attr_reader :mail
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attr_reader :message_id
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COMMON_ENCODINGS ||= [-"utf-8", -"windows-1252", -"iso-8859-1"]
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def self.formats
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@formats ||= Enum.new(plaintext: 1, markdown: 2)
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end
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def initialize(mail_string, opts = {})
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raise EmptyEmailError if mail_string.blank?
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@staged_users = []
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@raw_email = mail_string
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COMMON_ENCODINGS.each do |encoding|
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fixed = try_to_encode(mail_string, encoding)
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break @raw_email = fixed if fixed.present?
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end
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@mail = Mail.new(@raw_email)
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@message_id = @mail.message_id.presence || Digest::MD5.hexdigest(mail_string)
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@opts = opts
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end
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def process!
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return if is_blacklisted?
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id_hash = Digest::SHA1.hexdigest(@message_id)
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DistributedMutex.synchronize("process_email_#{id_hash}") do
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begin
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return if IncomingEmail.exists?(message_id: @message_id)
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ensure_valid_address_lists
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ensure_valid_date
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@from_email, @from_display_name = parse_from_field
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@from_user = User.find_by_email(@from_email)
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@incoming_email = create_incoming_email
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process_internal
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raise BouncedEmailError if is_bounce?
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rescue => e
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error = e.to_s
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error = e.class.name if error.blank?
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@incoming_email.update_columns(error: error) if @incoming_email
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delete_staged_users
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raise
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end
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end
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end
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def ensure_valid_address_lists
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[:to, :cc, :bcc].each do |field|
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addresses = @mail[field]
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if addresses&.errors.present?
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@mail[field] = addresses.to_s.scan(/\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b/i)
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end
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end
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end
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def ensure_valid_date
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if @mail.date.nil?
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raise InvalidPost, I18n.t("system_messages.email_reject_invalid_post_specified.date_invalid")
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end
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end
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def is_blacklisted?
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return false if SiteSetting.ignore_by_title.blank?
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Regexp.new(SiteSetting.ignore_by_title, Regexp::IGNORECASE) =~ @mail.subject
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end
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def create_incoming_email
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IncomingEmail.create(
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message_id: @message_id,
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raw: Email::Cleaner.new(@raw_email).execute,
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subject: subject,
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from_address: @from_email,
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to_addresses: @mail.to&.map(&:downcase)&.join(";"),
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cc_addresses: @mail.cc&.map(&:downcase)&.join(";"),
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)
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end
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def process_internal
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handle_bounce if is_bounce?
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raise NoSenderDetectedError if @from_email.blank?
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raise FromReplyByAddressError if is_from_reply_by_email_address?
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raise ScreenedEmailError if ScreenedEmail.should_block?(@from_email)
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user = @from_user
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if user.present?
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log_and_validate_user(user)
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else
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raise UserNotFoundError unless SiteSetting.enable_staged_users
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end
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body, elided = select_body
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body ||= ""
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raise NoBodyDetectedError if body.blank? && attachments.empty? && !is_bounce?
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if is_auto_generated? && !sent_to_mailinglist_mirror?
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@incoming_email.update_columns(is_auto_generated: true)
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if SiteSetting.block_auto_generated_emails? && !is_bounce?
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raise AutoGeneratedEmailError
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end
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end
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if action = subscription_action_for(body, subject)
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raise UnsubscribeNotAllowed if user.nil?
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send_subscription_mail(action, user)
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return
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end
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if post = find_related_post
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# Most of the time, it is impossible to **reply** without a reply key, so exit early
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if user.blank?
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if sent_to_mailinglist_mirror? || !SiteSetting.find_related_post_with_key
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user = stage_from_user
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elsif user.blank?
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raise BadDestinationAddress
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end
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end
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create_reply(user: user,
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raw: body,
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elided: elided,
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post: post,
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topic: post.topic,
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skip_validations: user.staged?,
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bounce: is_bounce?)
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else
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first_exception = nil
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destinations.each do |destination|
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begin
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return process_destination(destination, user, body, elided)
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rescue => e
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first_exception ||= e
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end
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end
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raise first_exception if first_exception
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# We don't stage new users for emails to reply addresses, exit if user is nil
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raise BadDestinationAddress if user.blank?
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post = find_related_post(force: true)
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if post && Guardian.new(user).can_see_post?(post)
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num_of_days = SiteSetting.disallow_reply_by_email_after_days
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if num_of_days > 0 && post.created_at < num_of_days.days.ago
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raise OldDestinationError.new("#{Discourse.base_url}/p/#{post.id}")
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end
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end
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raise ReplyToDigestError if EmailLog.where(email_type: "digest", message_id: @mail.in_reply_to).exists?
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raise BadDestinationAddress
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end
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end
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def log_and_validate_user(user)
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@incoming_email.update_columns(user_id: user.id)
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raise InactiveUserError if !user.active && !user.staged
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raise SilencedUserError if user.silenced?
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end
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def is_bounce?
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@mail.bounced? || bounce_key
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end
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def handle_bounce
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@incoming_email.update_columns(is_bounce: true)
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if email_log.present?
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email_log.update_columns(bounced: true)
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post = email_log.post
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topic = email_log.topic
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end
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if @mail.error_status.present? && Array.wrap(@mail.error_status).any? { |s| s.start_with?("4.") }
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Email::Receiver.update_bounce_score(@from_email, SiteSetting.soft_bounce_score)
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else
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Email::Receiver.update_bounce_score(@from_email, SiteSetting.hard_bounce_score)
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end
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if SiteSetting.enable_whispers? && @from_user&.staged?
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return if email_log.blank?
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if post.present? && topic.present? && topic.archetype == Archetype.private_message
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body, elided = select_body
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body ||= ""
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create_reply(user: @from_user,
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raw: body,
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elided: elided,
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post: post,
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topic: topic,
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skip_validations: true,
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bounce: true)
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end
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end
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raise BouncedEmailError
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end
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def is_from_reply_by_email_address?
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Email::Receiver.reply_by_email_address_regex.match(@from_email)
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end
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def bounce_key
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@bounce_key ||= begin
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verp = all_destinations.select { |to| to[/\+verp-\h{32}@/] }.first
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verp && verp[/\+verp-(\h{32})@/, 1]
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end
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end
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def email_log
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return nil if bounce_key.blank?
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@email_log ||= EmailLog.find_by(bounce_key: bounce_key)
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end
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def self.update_bounce_score(email, score)
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if user = User.find_by_email(email)
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old_bounce_score = user.user_stat.bounce_score
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new_bounce_score = old_bounce_score + score
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range = (old_bounce_score + 1..new_bounce_score)
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user.user_stat.bounce_score = new_bounce_score
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user.user_stat.reset_bounce_score_after = SiteSetting.reset_bounce_score_after_days.days.from_now
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user.user_stat.save!
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if range === SiteSetting.bounce_score_threshold
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# NOTE: we check bounce_score before sending emails
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# So log we revoked the email...
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reason = I18n.t("user.email.revoked", email: user.email, date: user.user_stat.reset_bounce_score_after)
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StaffActionLogger.new(Discourse.system_user).log_revoke_email(user, reason)
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# ... and PM the user
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SystemMessage.create_from_system_user(user, :email_revoked)
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end
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end
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end
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def is_auto_generated?
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return false if SiteSetting.auto_generated_whitelist.split('|').include?(@from_email)
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@mail[:precedence].to_s[/list|junk|bulk|auto_reply/i] ||
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@mail[:from].to_s[/(mailer[\-_]?daemon|post[\-_]?master|no[\-_]?reply)@/i] ||
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@mail[:subject].to_s[/^\s*(Auto:|Automatic reply|Autosvar|Automatisk svar|Automatisch antwoord|Abwesenheitsnotiz|Risposta Non al computer|Automatisch antwoord|Auto Response|Respuesta automática|Fuori sede|Out of Office|Frånvaro|Réponse automatique)/i] ||
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@mail.header.to_s[/auto[\-_]?(response|submitted|replied|reply|generated|respond)|holidayreply|machinegenerated/i]
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end
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def is_spam?
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case SiteSetting.email_in_spam_header
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when 'X-Spam-Flag'
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@mail[:x_spam_flag].to_s[/YES/i]
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when 'X-Spam-Status'
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@mail[:x_spam_status].to_s[/^Yes, /i]
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when 'X-SES-Spam-Verdict'
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@mail[:x_ses_spam_verdict].to_s[/FAIL/i]
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else
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false
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end
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end
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def auth_res_action
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@auth_res_action ||= AuthenticationResults.new(@mail.header[:authentication_results]).action
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end
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def select_body
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text = nil
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html = nil
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text_content_type = nil
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if @mail.multipart?
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text = fix_charset(@mail.text_part)
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html = fix_charset(@mail.html_part)
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text_content_type = @mail.text_part&.content_type
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elsif @mail.content_type.to_s["text/html"]
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html = fix_charset(@mail)
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elsif @mail.content_type.blank? || @mail.content_type["text/plain"]
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text = fix_charset(@mail)
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text_content_type = @mail.content_type
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end
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return unless text.present? || html.present?
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if text.present?
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text = trim_discourse_markers(text)
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text, elided_text = trim_reply_and_extract_elided(text)
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if @opts[:convert_plaintext] || sent_to_mailinglist_mirror?
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text_content_type ||= ""
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converter_opts = {
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format_flowed: !!(text_content_type =~ /format\s*=\s*["']?flowed["']?/i),
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delete_flowed_space: !!(text_content_type =~ /DelSp\s*=\s*["']?yes["']?/i)
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}
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text = PlainTextToMarkdown.new(text, converter_opts).to_markdown
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elided_text = PlainTextToMarkdown.new(elided_text, converter_opts).to_markdown
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end
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end
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markdown, elided_markdown = if html.present?
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# use the first html extracter that matches
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if html_extracter = HTML_EXTRACTERS.select { |_, r| html[r] }.min_by { |_, r| html =~ r }
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doc = Nokogiri::HTML5.fragment(html)
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self.public_send(:"extract_from_#{html_extracter[0]}", doc)
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else
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markdown = HtmlToMarkdown.new(html, keep_img_tags: true, keep_cid_imgs: true).to_markdown
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markdown = trim_discourse_markers(markdown)
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trim_reply_and_extract_elided(markdown)
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end
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end
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text_format = Receiver::formats[:plaintext]
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if text.blank? || (SiteSetting.incoming_email_prefer_html && markdown.present?)
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text, elided_text, text_format = markdown, elided_markdown, Receiver::formats[:markdown]
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end
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if SiteSetting.strip_incoming_email_lines
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in_code = nil
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text = text.lines.map! do |line|
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stripped = line.strip << "\n"
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# Do not strip list items.
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next line if (stripped[0] == '*' || stripped[0] == '-' || stripped[0] == '+') && stripped[1] == ' '
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# Match beginning and ending of code blocks.
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if !in_code && stripped[0..2] == '```'
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in_code = '```'
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elsif in_code == '```' && stripped[0..2] == '```'
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in_code = nil
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elsif !in_code && stripped[0..4] == '[code'
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in_code = '[code]'
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elsif in_code == '[code]' && stripped[0..6] == '[/code]'
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in_code = nil
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end
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# Strip only lines outside code blocks.
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in_code ? line : stripped
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end.join
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end
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[text, elided_text, text_format]
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end
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def to_markdown(html, elided_html)
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markdown = HtmlToMarkdown.new(html, keep_img_tags: true, keep_cid_imgs: true).to_markdown
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elided_markdown = HtmlToMarkdown.new(elided_html, keep_img_tags: true, keep_cid_imgs: true).to_markdown
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[EmailReplyTrimmer.trim(markdown), elided_markdown]
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end
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HTML_EXTRACTERS ||= [
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[:gmail, /class="gmail_(signature|extra)/],
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[:outlook, /id="(divRplyFwdMsg|Signature)"/],
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[:word, /class="WordSection1"/],
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[:exchange, /name="message(Body|Reply)Section"/],
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[:apple_mail, /id="AppleMailSignature"/],
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[:mozilla, /class="moz-/],
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[:protonmail, /class="protonmail_/],
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[:zimbra, /data-marker="__/],
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[:newton, /(id|class)="cm_/],
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]
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def extract_from_gmail(doc)
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# GMail adds a bunch of 'gmail_' prefixed classes like: gmail_signature, gmail_extra, gmail_quote, gmail_default...
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elided = doc.css(".gmail_signature, .gmail_extra").remove
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to_markdown(doc.to_html, elided.to_html)
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end
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def extract_from_outlook(doc)
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# Outlook properly identifies the signature and any replied/forwarded email
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# Use their id to remove them and anything that comes after
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elided = doc.css("#Signature, #Signature ~ *, hr, #divRplyFwdMsg, #divRplyFwdMsg ~ *").remove
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to_markdown(doc.to_html, elided.to_html)
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end
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def extract_from_word(doc)
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# Word (?) keeps the content in the 'WordSection1' class and uses <p> tags
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# When there's something else (<table>, <div>, etc..) there's high chance it's a signature or forwarded email
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elided = doc.css(".WordSection1 > :not(p):not(ul):first-of-type, .WordSection1 > :not(p):not(ul):first-of-type ~ *").remove
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to_markdown(doc.at(".WordSection1").to_html, elided.to_html)
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end
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def extract_from_exchange(doc)
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# Exchange is using the 'messageReplySection' class for forwarded emails
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# And 'messageBodySection' for the actual email
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elided = doc.css("div[name='messageReplySection']").remove
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to_markdown(doc.css("div[name='messageReplySection']").to_html, elided.to_html)
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end
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def extract_from_apple_mail(doc)
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# AppleMail is the worst. It adds 'AppleMailSignature' ids (!) to several div/p with no deterministic rules
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# Our best guess is to elide whatever comes after that.
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elided = doc.css("#AppleMailSignature:last-of-type ~ *").remove
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to_markdown(doc.to_html, elided.to_html)
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end
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def extract_from_mozilla(doc)
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# Mozilla (Thunderbird ?) properly identifies signature and forwarded emails
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# Remove them and anything that comes after
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elided = doc.css("*[class^='moz-'], *[class^='moz-'] ~ *").remove
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to_markdown(doc.to_html, elided.to_html)
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end
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def extract_from_protonmail(doc)
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# Removes anything that has a class starting with "protonmail_" and everything after that
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elided = doc.css("*[class^='protonmail_'], *[class^='protonmail_'] ~ *").remove
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to_markdown(doc.to_html, elided.to_html)
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end
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def extract_from_zimbra(doc)
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# Removes anything that has a 'data-marker' attribute
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elided = doc.css("*[data-marker]").remove
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to_markdown(doc.to_html, elided.to_html)
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end
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def extract_from_newton(doc)
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# Removes anything that has an id or a class starting with 'cm_'
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elided = doc.css("*[id^='cm_'], *[class^='cm_']").remove
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to_markdown(doc.to_html, elided.to_html)
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end
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def trim_reply_and_extract_elided(text)
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return [text, ""] if @opts[:skip_trimming]
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EmailReplyTrimmer.trim(text, true)
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end
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def fix_charset(mail_part)
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return nil if mail_part.blank? || mail_part.body.blank?
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string = mail_part.body.decoded rescue nil
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return nil if string.blank?
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# common encodings
|
|
encodings = COMMON_ENCODINGS.dup
|
|
encodings.unshift(mail_part.charset) if mail_part.charset.present?
|
|
|
|
# mail (>=2.5) decodes mails with 8bit transfer encoding to utf-8, so
|
|
# always try UTF-8 first
|
|
if mail_part.content_transfer_encoding == "8bit"
|
|
encodings.delete("UTF-8")
|
|
encodings.unshift("UTF-8")
|
|
end
|
|
|
|
encodings.uniq.each do |encoding|
|
|
fixed = try_to_encode(string, encoding)
|
|
return fixed if fixed.present?
|
|
end
|
|
|
|
nil
|
|
end
|
|
|
|
def try_to_encode(string, encoding)
|
|
encoded = string.encode("UTF-8", encoding)
|
|
!encoded.nil? && encoded.valid_encoding? ? encoded : nil
|
|
rescue Encoding::InvalidByteSequenceError,
|
|
Encoding::UndefinedConversionError,
|
|
Encoding::ConverterNotFoundError
|
|
nil
|
|
end
|
|
|
|
def previous_replies_regex
|
|
@previous_replies_regex ||= /^--[- ]\n\*#{I18n.t("user_notifications.previous_discussion")}\*\n/im
|
|
end
|
|
|
|
def trim_discourse_markers(reply)
|
|
reply.split(previous_replies_regex)[0]
|
|
end
|
|
|
|
def parse_from_field(mail = nil)
|
|
mail ||= @mail
|
|
|
|
if email_log.present?
|
|
email = email_log.to_address || email_log.user&.email
|
|
return [email, email_log.user&.username]
|
|
elsif mail.bounced?
|
|
Array.wrap(mail.final_recipient).each do |from|
|
|
return extract_from_address_and_name(from)
|
|
end
|
|
end
|
|
|
|
return unless mail[:from]
|
|
|
|
if mail[:from].errors.blank?
|
|
mail[:from].address_list.addresses.each do |address_field|
|
|
address_field.decoded
|
|
from_address = address_field.address
|
|
from_display_name = address_field.display_name.try(:to_s)
|
|
return [from_address&.downcase, from_display_name&.strip] if from_address["@"]
|
|
end
|
|
end
|
|
|
|
return extract_from_address_and_name(mail.from) if mail.from.is_a? String
|
|
|
|
if mail.from.is_a? Mail::AddressContainer
|
|
mail.from.each do |from|
|
|
from_address, from_display_name = extract_from_address_and_name(from)
|
|
return [from_address, from_display_name] if from_address
|
|
end
|
|
end
|
|
|
|
nil
|
|
rescue StandardError
|
|
nil
|
|
end
|
|
|
|
def extract_from_address_and_name(value)
|
|
if value[";"]
|
|
from_display_name, from_address = value.split(";")
|
|
return [from_address&.strip&.downcase, from_display_name&.strip]
|
|
end
|
|
|
|
if value[/<[^>]+>/]
|
|
from_address = value[/<([^>]+)>/, 1]
|
|
from_display_name = value[/^([^<]+)/, 1]
|
|
end
|
|
|
|
if (from_address.blank? || !from_address["@"]) && value[/\[mailto:[^\]]+\]/]
|
|
from_address = value[/\[mailto:([^\]]+)\]/, 1]
|
|
from_display_name = value[/^([^\[]+)/, 1]
|
|
end
|
|
|
|
[from_address&.downcase, from_display_name&.strip]
|
|
end
|
|
|
|
def subject
|
|
@subject ||=
|
|
if mail_subject = @mail.subject
|
|
mail_subject.delete("\u0000")
|
|
else
|
|
I18n.t("emails.incoming.default_subject", email: @from_email)
|
|
end
|
|
end
|
|
|
|
def find_or_create_user(email, display_name, raise_on_failed_create: false)
|
|
user = nil
|
|
|
|
User.transaction do
|
|
user = User.find_by_email(email)
|
|
|
|
if user.nil? && SiteSetting.enable_staged_users
|
|
raise EmailNotAllowed unless EmailValidator.allowed?(email)
|
|
|
|
username = UserNameSuggester.sanitize_username(display_name) if display_name.present?
|
|
begin
|
|
user = User.create!(
|
|
email: email,
|
|
username: UserNameSuggester.suggest(username.presence || email),
|
|
name: display_name.presence || User.suggest_name(email),
|
|
staged: true
|
|
)
|
|
@staged_users << user
|
|
rescue PG::UniqueViolation, ActiveRecord::RecordNotUnique, ActiveRecord::RecordInvalid
|
|
raise if raise_on_failed_create
|
|
user = nil
|
|
end
|
|
end
|
|
end
|
|
|
|
user
|
|
end
|
|
|
|
def find_or_create_user!(email, display_name)
|
|
find_or_create_user(email, display_name, raise_on_failed_create: true)
|
|
end
|
|
|
|
def all_destinations
|
|
@all_destinations ||= [
|
|
@mail.destinations,
|
|
[@mail[:x_forwarded_to]].flatten.compact.map(&:decoded),
|
|
[@mail[:delivered_to]].flatten.compact.map(&:decoded),
|
|
].flatten.select(&:present?).uniq.lazy
|
|
end
|
|
|
|
def destinations
|
|
@destinations ||= all_destinations
|
|
.map { |d| Email::Receiver.check_address(d, is_bounce?) }
|
|
.reject(&:blank?)
|
|
end
|
|
|
|
def sent_to_mailinglist_mirror?
|
|
@sent_to_mailinglist_mirror ||= begin
|
|
destinations.each do |destination|
|
|
next unless destination[:type] == :category
|
|
|
|
category = destination[:obj]
|
|
return true if category.mailinglist_mirror?
|
|
end
|
|
|
|
false
|
|
end
|
|
end
|
|
|
|
def self.check_address(address, include_verp = false)
|
|
# only check for a group/category when 'email_in' is enabled
|
|
if SiteSetting.email_in
|
|
group = Group.find_by_email(address)
|
|
return { type: :group, obj: group } if group
|
|
|
|
category = Category.find_by_email(address)
|
|
return { type: :category, obj: category } if category
|
|
end
|
|
|
|
# reply
|
|
match = Email::Receiver.reply_by_email_address_regex(true, include_verp).match(address)
|
|
if match && match.captures
|
|
match.captures.each do |c|
|
|
next if c.blank?
|
|
post_reply_key = PostReplyKey.find_by(reply_key: c)
|
|
return { type: :reply, obj: post_reply_key } if post_reply_key
|
|
end
|
|
end
|
|
nil
|
|
end
|
|
|
|
def process_destination(destination, user, body, elided)
|
|
return if SiteSetting.forwarded_emails_behaviour != "hide" &&
|
|
has_been_forwarded? &&
|
|
process_forwarded_email(destination, user)
|
|
|
|
return if is_bounce? && destination[:type] != :reply
|
|
|
|
case destination[:type]
|
|
when :group
|
|
user ||= stage_from_user
|
|
|
|
group = destination[:obj]
|
|
create_group_post(group, user, body, elided)
|
|
|
|
when :category
|
|
category = destination[:obj]
|
|
|
|
raise StrangersNotAllowedError if (user.nil? || user.staged?) && !category.email_in_allow_strangers
|
|
|
|
user ||= stage_from_user
|
|
|
|
raise InsufficientTrustLevelError if !user.has_trust_level?(SiteSetting.email_in_min_trust) && !sent_to_mailinglist_mirror?
|
|
|
|
create_topic(user: user,
|
|
raw: body,
|
|
elided: elided,
|
|
title: subject,
|
|
category: category.id,
|
|
skip_validations: user.staged?)
|
|
|
|
when :reply
|
|
# We don't stage new users for emails to reply addresses, exit if user is nil
|
|
raise BadDestinationAddress if user.blank?
|
|
|
|
post_reply_key = destination[:obj]
|
|
post = Post.with_deleted.find(post_reply_key.post_id)
|
|
raise ReplyNotAllowedError if !Guardian.new(user).can_create_post?(post&.topic)
|
|
|
|
if post_reply_key.user_id != user.id && !forwarded_reply_key?(post_reply_key, user)
|
|
raise ReplyUserNotMatchingError, "post_reply_key.user_id => #{post_reply_key.user_id.inspect}, user.id => #{user.id.inspect}"
|
|
end
|
|
|
|
create_reply(user: user,
|
|
raw: body,
|
|
elided: elided,
|
|
post: post,
|
|
topic: post&.topic,
|
|
skip_validations: user.staged?,
|
|
bounce: is_bounce?)
|
|
end
|
|
end
|
|
|
|
def create_group_post(group, user, body, elided)
|
|
message_ids = Email::Receiver.extract_reply_message_ids(@mail, max_message_id_count: 5)
|
|
post_ids = []
|
|
|
|
incoming_emails = IncomingEmail
|
|
.where(message_id: message_ids)
|
|
.addressed_to_user(user)
|
|
.pluck(:post_id, :to_addresses, :cc_addresses)
|
|
|
|
incoming_emails.each do |post_id, to_addresses, cc_addresses|
|
|
post_ids << post_id if contains_email_address_of_user?(to_addresses, user) ||
|
|
contains_email_address_of_user?(cc_addresses, user)
|
|
end
|
|
|
|
if post_ids.any? && post = Post.where(id: post_ids).order(:created_at).last
|
|
create_reply(user: user,
|
|
raw: body,
|
|
elided: elided,
|
|
post: post,
|
|
topic: post.topic,
|
|
skip_validations: true)
|
|
else
|
|
enable_email_pm_setting(user)
|
|
|
|
create_topic(user: user,
|
|
raw: body,
|
|
elided: elided,
|
|
title: subject,
|
|
archetype: Archetype.private_message,
|
|
target_group_names: [group.name],
|
|
is_group_message: true,
|
|
skip_validations: true)
|
|
end
|
|
end
|
|
|
|
def forwarded_reply_key?(post_reply_key, user)
|
|
incoming_emails = IncomingEmail
|
|
.joins(:post)
|
|
.where('posts.topic_id = ?', post_reply_key.post.topic_id)
|
|
.addressed_to(post_reply_key.reply_key)
|
|
.addressed_to_user(user)
|
|
.pluck(:to_addresses, :cc_addresses)
|
|
|
|
incoming_emails.each do |to_addresses, cc_addresses|
|
|
next unless contains_email_address_of_user?(to_addresses, user) ||
|
|
contains_email_address_of_user?(cc_addresses, user)
|
|
|
|
return true if contains_reply_by_email_address(to_addresses, post_reply_key.reply_key) ||
|
|
contains_reply_by_email_address(cc_addresses, post_reply_key.reply_key)
|
|
end
|
|
|
|
false
|
|
end
|
|
|
|
def contains_email_address_of_user?(addresses, user)
|
|
return false if addresses.blank?
|
|
|
|
addresses = addresses.split(";")
|
|
user.user_emails.any? { |user_email| addresses.include?(user_email.email) }
|
|
end
|
|
|
|
def contains_reply_by_email_address(addresses, reply_key)
|
|
return false if addresses.blank?
|
|
|
|
addresses.split(";").each do |address|
|
|
match = Email::Receiver.reply_by_email_address_regex.match(address)
|
|
return true if match && match.captures&.include?(reply_key)
|
|
end
|
|
|
|
false
|
|
end
|
|
|
|
def has_been_forwarded?
|
|
subject[/^[[:blank:]]*(fwd?|tr)[[:blank:]]?:/i] && embedded_email_raw.present?
|
|
end
|
|
|
|
def embedded_email_raw
|
|
return @embedded_email_raw if @embedded_email_raw
|
|
text = fix_charset(@mail.multipart? ? @mail.text_part : @mail)
|
|
@embedded_email_raw, @before_embedded = EmailReplyTrimmer.extract_embedded_email(text)
|
|
@embedded_email_raw
|
|
end
|
|
|
|
def process_forwarded_email(destination, user)
|
|
user ||= stage_from_user
|
|
case SiteSetting.forwarded_emails_behaviour
|
|
when "create_replies"
|
|
forwarded_email_create_replies(destination, user)
|
|
when "quote"
|
|
forwarded_email_quote_forwarded(destination, user)
|
|
else
|
|
false
|
|
end
|
|
end
|
|
|
|
def forwarded_email_create_topic(destination: , user: , raw: , title: , date: nil, embedded_user: nil)
|
|
case destination[:type]
|
|
when :group
|
|
group = destination[:obj]
|
|
topic_user = embedded_user&.call || user
|
|
create_topic(user: topic_user,
|
|
raw: raw,
|
|
title: title,
|
|
archetype: Archetype.private_message,
|
|
target_usernames: [user.username],
|
|
target_group_names: [group.name],
|
|
is_group_message: true,
|
|
skip_validations: true,
|
|
created_at: date)
|
|
|
|
when :category
|
|
category = destination[:obj]
|
|
|
|
return false if user.staged? && !category.email_in_allow_strangers
|
|
return false if !user.has_trust_level?(SiteSetting.email_in_min_trust)
|
|
|
|
topic_user = embedded_user&.call || user
|
|
create_topic(user: topic_user,
|
|
raw: raw,
|
|
title: title,
|
|
category: category.id,
|
|
skip_validations: topic_user.staged?,
|
|
created_at: date)
|
|
else
|
|
false
|
|
end
|
|
end
|
|
|
|
def forwarded_email_create_replies(destination, user)
|
|
embedded = Mail.new(embedded_email_raw)
|
|
email, display_name = parse_from_field(embedded)
|
|
|
|
return false if email.blank? || !email["@"]
|
|
|
|
post = forwarded_email_create_topic(destination: destination,
|
|
user: user,
|
|
raw: try_to_encode(embedded.decoded, "UTF-8").presence || embedded.to_s,
|
|
title: embedded.subject.presence || subject,
|
|
date: embedded.date,
|
|
embedded_user: lambda { find_or_create_user(email, display_name) })
|
|
return false unless post
|
|
|
|
if post.topic
|
|
# mark post as seen for the forwarder
|
|
PostTiming.record_timing(user_id: user.id, topic_id: post.topic_id, post_number: post.post_number, msecs: 5000)
|
|
|
|
# create reply when available
|
|
if @before_embedded.present?
|
|
post_type = Post.types[:regular]
|
|
post_type = Post.types[:whisper] if post.topic.private_message? && destination[:obj].usernames[user.username]
|
|
|
|
create_reply(user: user,
|
|
raw: @before_embedded,
|
|
post: post,
|
|
topic: post.topic,
|
|
post_type: post_type,
|
|
skip_validations: user.staged?)
|
|
else
|
|
post.topic.add_small_action(user, "forwarded")
|
|
end
|
|
end
|
|
|
|
true
|
|
end
|
|
|
|
def forwarded_email_quote_forwarded(destination, user)
|
|
embedded = embedded_email_raw
|
|
raw = <<~EOF
|
|
#{@before_embedded}
|
|
|
|
[quote]
|
|
#{PlainTextToMarkdown.new(embedded).to_markdown}
|
|
[/quote]
|
|
EOF
|
|
|
|
return true if forwarded_email_create_topic(destination: destination, user: user, raw: raw, title: subject)
|
|
end
|
|
|
|
def self.reply_by_email_address_regex(extract_reply_key = true, include_verp = false)
|
|
reply_addresses = [SiteSetting.reply_by_email_address]
|
|
reply_addresses << (SiteSetting.alternative_reply_by_email_addresses.presence || "").split("|")
|
|
|
|
if include_verp && SiteSetting.reply_by_email_address.present? && SiteSetting.reply_by_email_address["+"]
|
|
reply_addresses << SiteSetting.reply_by_email_address.sub("%{reply_key}", "verp-%{reply_key}")
|
|
end
|
|
|
|
reply_addresses.flatten!
|
|
reply_addresses.select!(&:present?)
|
|
reply_addresses.map! { |a| Regexp.escape(a) }
|
|
reply_addresses.map! { |a| a.gsub("\+", "\+?") }
|
|
reply_addresses.map! { |a| a.gsub(Regexp.escape("%{reply_key}"), "(\\h{32})?") }
|
|
if reply_addresses.empty?
|
|
/$a/ # a regex that can never match
|
|
else
|
|
/#{reply_addresses.join("|")}/
|
|
end
|
|
end
|
|
|
|
def group_incoming_emails_regex
|
|
@group_incoming_emails_regex ||= Regexp.union Group.pluck(:incoming_email).select(&:present?).map { |e| e.split("|") }.flatten.uniq
|
|
end
|
|
|
|
def category_email_in_regex
|
|
@category_email_in_regex ||= Regexp.union Category.pluck(:email_in).select(&:present?).map { |e| e.split("|") }.flatten.uniq
|
|
end
|
|
|
|
def find_related_post(force: false)
|
|
return if !force && SiteSetting.find_related_post_with_key && !sent_to_mailinglist_mirror?
|
|
|
|
message_ids = Email::Receiver.extract_reply_message_ids(@mail, max_message_id_count: 5)
|
|
return if message_ids.empty?
|
|
|
|
host = Email::Sender.host_for(Discourse.base_url)
|
|
post_id_regexp = Regexp.new "topic/\\d+/(\\d+)@#{Regexp.escape(host)}"
|
|
topic_id_regexp = Regexp.new "topic/(\\d+)@#{Regexp.escape(host)}"
|
|
|
|
post_ids = message_ids.map { |message_id| message_id[post_id_regexp, 1] }.compact.map(&:to_i)
|
|
post_ids << Post.where(topic_id: message_ids.map { |message_id| message_id[topic_id_regexp, 1] }.compact, post_number: 1).pluck(:id)
|
|
post_ids << EmailLog.where(message_id: message_ids).pluck(:post_id)
|
|
post_ids << IncomingEmail.where(message_id: message_ids).pluck(:post_id)
|
|
|
|
post_ids.flatten!
|
|
post_ids.compact!
|
|
post_ids.uniq!
|
|
|
|
return if post_ids.empty?
|
|
|
|
Post.where(id: post_ids).order(:created_at).last
|
|
end
|
|
|
|
def self.extract_reply_message_ids(mail, max_message_id_count:)
|
|
message_ids = [mail.in_reply_to, Email::Receiver.extract_references(mail.references)]
|
|
message_ids.flatten!
|
|
message_ids.select!(&:present?)
|
|
message_ids.uniq!
|
|
message_ids.first(max_message_id_count)
|
|
end
|
|
|
|
def self.extract_references(references)
|
|
if Array === references
|
|
references
|
|
elsif references.present?
|
|
references.split(/[\s,]/).map { |r| r.tr("<>", "") }
|
|
end
|
|
end
|
|
|
|
def likes
|
|
@likes ||= Set.new ["+1", "<3", "❤", I18n.t('post_action_types.like.title').downcase]
|
|
end
|
|
|
|
def subscription_action_for(body, subject)
|
|
return unless SiteSetting.unsubscribe_via_email
|
|
return if sent_to_mailinglist_mirror?
|
|
|
|
if ([subject, body].compact.map(&:to_s).map(&:downcase) & ['unsubscribe']).any?
|
|
:confirm_unsubscribe
|
|
end
|
|
end
|
|
|
|
def post_action_for(body)
|
|
PostActionType.types[:like] if likes.include?(body.strip.downcase)
|
|
end
|
|
|
|
def create_topic(options = {})
|
|
create_post_with_attachments(options)
|
|
end
|
|
|
|
def notification_level_for(body)
|
|
# since we are stripping save all this work on long replies
|
|
return nil if body.length > 40
|
|
|
|
body = body.strip.downcase
|
|
case body
|
|
when "mute"
|
|
NotificationLevels.topic_levels[:muted]
|
|
when "track"
|
|
NotificationLevels.topic_levels[:tracking]
|
|
when "watch"
|
|
NotificationLevels.topic_levels[:watching]
|
|
else nil
|
|
end
|
|
end
|
|
|
|
def create_reply(options = {})
|
|
raise TopicNotFoundError if options[:topic].nil? || options[:topic].trashed?
|
|
raise BouncedEmailError if options[:bounce] && options[:topic].archetype != Archetype.private_message
|
|
|
|
options[:post] = nil if options[:post]&.trashed?
|
|
enable_email_pm_setting(options[:user]) if options[:topic].archetype == Archetype.private_message
|
|
|
|
if post_action_type = post_action_for(options[:raw])
|
|
create_post_action(options[:user], options[:post], post_action_type)
|
|
elsif notification_level = notification_level_for(options[:raw])
|
|
TopicUser.change(options[:user].id, options[:post].topic_id, notification_level: notification_level)
|
|
else
|
|
raise TopicClosedError if options[:topic].closed?
|
|
options[:topic_id] = options[:topic].id
|
|
options[:reply_to_post_number] = options[:post]&.post_number
|
|
options[:is_group_message] = options[:topic].private_message? && options[:topic].allowed_groups.exists?
|
|
create_post_with_attachments(options)
|
|
end
|
|
end
|
|
|
|
def create_post_action(user, post, type)
|
|
result = PostActionCreator.new(user, post, type).perform
|
|
raise InvalidPostAction.new if result.failed? && result.forbidden
|
|
end
|
|
|
|
def is_whitelisted_attachment?(attachment)
|
|
attachment.content_type !~ SiteSetting.attachment_content_type_blacklist_regex &&
|
|
attachment.filename !~ SiteSetting.attachment_filename_blacklist_regex
|
|
end
|
|
|
|
def attachments
|
|
@attachments ||= begin
|
|
attachments = @mail.attachments.select { |attachment| is_whitelisted_attachment?(attachment) }
|
|
attachments << @mail if @mail.attachment? && is_whitelisted_attachment?(@mail)
|
|
|
|
@mail.parts.each do |part|
|
|
attachments << part if part.attachment? && is_whitelisted_attachment?(part)
|
|
end
|
|
|
|
attachments.uniq!
|
|
attachments
|
|
end
|
|
end
|
|
|
|
def create_post_with_attachments(options = {})
|
|
add_elided_to_raw!(options)
|
|
options[:raw] = add_attachments(options[:raw], options[:user], options)
|
|
create_post(options)
|
|
end
|
|
|
|
def add_attachments(raw, user, options = {})
|
|
raw = raw.dup
|
|
|
|
rejected_attachments = []
|
|
attachments.each do |attachment|
|
|
tmp = Tempfile.new(["discourse-email-attachment", File.extname(attachment.filename)])
|
|
begin
|
|
# read attachment
|
|
File.open(tmp.path, "w+b") { |f| f.write attachment.body.decoded }
|
|
# create the upload for the user
|
|
opts = { for_group_message: options[:is_group_message] }
|
|
upload = UploadCreator.new(tmp, attachment.filename, opts).create_for(user.id)
|
|
if upload.errors.empty?
|
|
# try to inline images
|
|
if attachment.content_type&.start_with?("image/")
|
|
if raw[attachment.url]
|
|
raw.sub!(attachment.url, upload.url)
|
|
|
|
InlineUploads.match_img(raw, uploads: { upload.url => upload }) do |match, src, replacement, _|
|
|
if src == upload.url
|
|
raw = raw.sub(match, replacement)
|
|
end
|
|
end
|
|
elsif raw[/\[image:.*?\d+[^\]]*\]/i]
|
|
raw.sub!(/\[image:.*?\d+[^\]]*\]/i, UploadMarkdown.new(upload).to_markdown)
|
|
else
|
|
raw << "\n\n#{UploadMarkdown.new(upload).to_markdown}\n\n"
|
|
end
|
|
else
|
|
raw << "\n\n#{UploadMarkdown.new(upload).to_markdown}\n\n"
|
|
end
|
|
else
|
|
rejected_attachments << upload
|
|
raw << "\n\n#{I18n.t('emails.incoming.missing_attachment', filename: upload.original_filename)}\n\n"
|
|
end
|
|
ensure
|
|
tmp&.close!
|
|
end
|
|
end
|
|
notify_about_rejected_attachment(rejected_attachments) if rejected_attachments.present? && !user.staged?
|
|
|
|
raw
|
|
end
|
|
|
|
def notify_about_rejected_attachment(attachments)
|
|
errors = []
|
|
|
|
attachments.each do |a|
|
|
error = a.errors.messages.values[0][0]
|
|
errors << "#{a.original_filename}: #{error}"
|
|
end
|
|
|
|
message = Mail::Message.new(@mail)
|
|
template_args = {
|
|
former_title: message.subject,
|
|
destination: message.to,
|
|
site_name: SiteSetting.title,
|
|
rejected_errors: errors.join("\n")
|
|
}
|
|
|
|
client_message = RejectionMailer.send_rejection(:email_reject_attachment, message.from, template_args)
|
|
Email::Sender.new(client_message, :email_reject_attachment).send
|
|
end
|
|
|
|
def add_elided_to_raw!(options)
|
|
is_private_message = options[:archetype] == Archetype.private_message ||
|
|
options[:topic].try(:private_message?)
|
|
|
|
# only add elided part in messages
|
|
if options[:elided].present? && (SiteSetting.always_show_trimmed_content || is_private_message)
|
|
options[:raw] << Email::Receiver.elided_html(options[:elided])
|
|
options[:elided] = ""
|
|
end
|
|
end
|
|
|
|
def create_post(options = {})
|
|
options[:via_email] = true
|
|
options[:raw_email] = @raw_email
|
|
|
|
options[:created_at] ||= @mail.date
|
|
options[:created_at] = DateTime.now if options[:created_at] > DateTime.now
|
|
|
|
add_elided_to_raw!(options)
|
|
|
|
if sent_to_mailinglist_mirror?
|
|
options[:skip_validations] = true
|
|
options[:skip_guardian] = true
|
|
else
|
|
options[:email_spam] = is_spam?
|
|
options[:first_post_checks] = true if is_spam?
|
|
options[:email_auth_res_action] = auth_res_action
|
|
end
|
|
|
|
user = options.delete(:user)
|
|
|
|
if options[:bounce]
|
|
options[:raw] = I18n.t("system_messages.email_bounced", email: user.email, raw: options[:raw])
|
|
user = Discourse.system_user
|
|
options[:post_type] = Post.types[:whisper]
|
|
end
|
|
|
|
result = NewPostManager.new(user, options).perform
|
|
|
|
errors = result.errors.full_messages
|
|
if errors.any? do |message|
|
|
message.include?(I18n.t("activerecord.attributes.post.raw").strip) &&
|
|
message.include?(I18n.t("errors.messages.too_short", count: SiteSetting.min_post_length).strip)
|
|
end
|
|
raise TooShortPost
|
|
end
|
|
|
|
if result.errors.present?
|
|
raise InvalidPost, errors.join("\n")
|
|
end
|
|
|
|
if result.post
|
|
@incoming_email.update_columns(topic_id: result.post.topic_id, post_id: result.post.id)
|
|
if result.post.topic&.private_message? && !is_bounce?
|
|
add_other_addresses(result.post, user)
|
|
end
|
|
end
|
|
|
|
result.post
|
|
end
|
|
|
|
def self.elided_html(elided)
|
|
html = +"\n\n" << "<details class='elided'>" << "\n"
|
|
html << "<summary title='#{I18n.t('emails.incoming.show_trimmed_content')}'>···</summary>" << "\n\n"
|
|
html << elided << "\n\n"
|
|
html << "</details>" << "\n"
|
|
html
|
|
end
|
|
|
|
def add_other_addresses(post, sender)
|
|
%i(to cc bcc).each do |d|
|
|
if @mail[d] && @mail[d].address_list && @mail[d].address_list.addresses
|
|
@mail[d].address_list.addresses.each do |address_field|
|
|
begin
|
|
address_field.decoded
|
|
email = address_field.address.downcase
|
|
display_name = address_field.display_name.try(:to_s)
|
|
next unless email["@"]
|
|
if should_invite?(email)
|
|
user = find_or_create_user(email, display_name)
|
|
if user && can_invite?(post.topic, user)
|
|
post.topic.topic_allowed_users.create!(user_id: user.id)
|
|
TopicUser.auto_notification_for_staging(user.id, post.topic_id, TopicUser.notification_reasons[:auto_watch])
|
|
post.topic.add_small_action(sender, "invited_user", user.username)
|
|
end
|
|
# cap number of staged users created per email
|
|
if @staged_users.count > SiteSetting.maximum_staged_users_per_email
|
|
post.topic.add_moderator_post(sender, I18n.t("emails.incoming.maximum_staged_user_per_email_reached"))
|
|
return
|
|
end
|
|
end
|
|
rescue ActiveRecord::RecordInvalid, EmailNotAllowed
|
|
# don't care if user already allowed or the user's email address is not allowed
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
def should_invite?(email)
|
|
email !~ Email::Receiver.reply_by_email_address_regex &&
|
|
email !~ group_incoming_emails_regex &&
|
|
email !~ category_email_in_regex
|
|
end
|
|
|
|
def can_invite?(topic, user)
|
|
!topic.topic_allowed_users.where(user_id: user.id).exists? &&
|
|
!topic.topic_allowed_groups.where("group_id IN (SELECT group_id FROM group_users WHERE user_id = ?)", user.id).exists?
|
|
end
|
|
|
|
def send_subscription_mail(action, user)
|
|
message = SubscriptionMailer.public_send(action, user)
|
|
Email::Sender.new(message, :subscription).send
|
|
end
|
|
|
|
def stage_from_user
|
|
@from_user ||= find_or_create_user!(@from_email, @from_display_name).tap do |u|
|
|
log_and_validate_user(u)
|
|
end
|
|
end
|
|
|
|
def delete_staged_users
|
|
@staged_users.each do |user|
|
|
if @incoming_email.user&.id == user.id
|
|
@incoming_email.update_columns(user_id: nil)
|
|
end
|
|
|
|
if user.posts.count == 0
|
|
UserDestroyer.new(Discourse.system_user).destroy(user, quiet: true)
|
|
end
|
|
end
|
|
end
|
|
|
|
def enable_email_pm_setting(user)
|
|
# ensure user PM emails are enabled (since user is posting via email)
|
|
if !user.staged && user.user_option.email_messages_level == UserOption.email_level_types[:never]
|
|
user.user_option.update!(email_messages_level: UserOption.email_level_types[:always])
|
|
end
|
|
end
|
|
end
|
|
end
|