151 lines
4.3 KiB
Ruby
151 lines
4.3 KiB
Ruby
#
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# A helper class to send an email. It will also handle a nil message, which it considers
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# to be "do nothing". This is because some Mailers will decide not to do work for some
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# reason. For example, emailing a user too frequently. A nil to address is also considered
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# "do nothing"
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#
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# It also adds an HTML part for the plain text body
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#
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require_dependency 'email/renderer'
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require 'uri'
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require 'net/smtp'
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SMTP_CLIENT_ERRORS = [Net::SMTPFatalError, Net::SMTPSyntaxError]
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module Email
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class Sender
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def initialize(message, email_type, user=nil)
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@message = message
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@email_type = email_type
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@user = user
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end
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def send
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return if SiteSetting.disable_emails
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return skip(I18n.t('email_log.message_blank')) if @message.blank?
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return skip(I18n.t('email_log.message_to_blank')) if @message.to.blank?
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if @message.text_part
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return skip(I18n.t('email_log.text_part_body_blank')) if @message.text_part.body.to_s.blank?
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else
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return skip(I18n.t('email_log.body_blank')) if @message.body.to_s.blank?
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end
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@message.charset = 'UTF-8'
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opts = {}
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renderer = Email::Renderer.new(@message, opts)
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if @message.html_part
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@message.html_part.body = renderer.html
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else
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@message.html_part = Mail::Part.new do
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content_type 'text/html; charset=UTF-8'
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body renderer.html
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end
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end
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@message.parts[0].body = @message.parts[0].body.to_s.gsub(/\[\/?email-indent\]/, '')
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@message.text_part.content_type = 'text/plain; charset=UTF-8'
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# Set up the email log
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email_log = EmailLog.new(email_type: @email_type,
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to_address: to_address,
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user_id: @user.try(:id))
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host = Email::Sender.host_for(Discourse.base_url)
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topic_id = header_value('X-Discourse-Topic-Id')
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post_id = header_value('X-Discourse-Post-Id')
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reply_key = header_value('X-Discourse-Reply-Key')
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if topic_id.present?
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email_log.topic_id = topic_id
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topic_identifier = "<topic/#{topic_id}@#{host}>"
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@message.header['In-Reply-To'] = topic_identifier
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@message.header['References'] = topic_identifier
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# http://www.ietf.org/rfc/rfc2919.txt
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list_id = "<topic.#{topic_id}.#{host}>"
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@message.header['List-ID'] = list_id
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topic = Topic.where(id: topic_id).first
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@message.header['List-Archive'] = topic.url if topic
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end
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if reply_key.present?
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if @message.header['Reply-To'] =~ /\<([^\>]+)\>/
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email = Regexp.last_match[1]
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@message.header['List-Post'] = "<mailto:#{email}>"
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end
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end
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email_log.post_id = post_id if post_id.present?
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email_log.reply_key = reply_key if reply_key.present?
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# Remove headers we don't need anymore
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@message.header['X-Discourse-Topic-Id'] = nil
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@message.header['X-Discourse-Post-Id'] = nil
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@message.header['X-Discourse-Reply-Key'] = nil
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# Suppress images from short emails
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if SiteSetting.strip_images_from_short_emails && @message.html_part.body.to_s.bytesize <= SiteSetting.short_email_length && @message.html_part.body =~ /<img[^>]+>/
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style = Email::Styles.new(@message.html_part.body.to_s)
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@message.html_part.body = style.strip_avatars_and_emojis
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end
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begin
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@message.deliver
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rescue *SMTP_CLIENT_ERRORS => e
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return skip(e.message)
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end
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# Save and return the email log
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email_log.save!
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email_log
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end
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def to_address
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@to_address ||= begin
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to = @message ? @message.to : nil
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to.is_a?(Array) ? to.first : to
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end
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end
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def self.host_for(base_url)
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host = "localhost"
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if base_url.present?
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begin
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uri = URI.parse(base_url)
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host = uri.host.downcase if uri.host.present?
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rescue URI::InvalidURIError
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end
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end
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host
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end
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private
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def header_value(name)
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header = @message.header[name]
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return nil unless header
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header.value
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end
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def skip(reason)
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EmailLog.create(email_type: @email_type,
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to_address: to_address,
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user_id: @user.try(:id),
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skipped: true,
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skipped_reason: reason)
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end
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end
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end
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