Chris@1295: # Redmine - project management software
Chris@1295: # Copyright (C) 2006-2013  Jean-Philippe Lang
Chris@1295: #
Chris@1295: # This program is free software; you can redistribute it and/or
Chris@1295: # modify it under the terms of the GNU General Public License
Chris@1295: # as published by the Free Software Foundation; either version 2
Chris@1295: # of the License, or (at your option) any later version.
Chris@1295: #
Chris@1295: # This program is distributed in the hope that it will be useful,
Chris@1295: # but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@1295: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@1295: # GNU General Public License for more details.
Chris@1295: #
Chris@1295: # You should have received a copy of the GNU General Public License
Chris@1295: # along with this program; if not, write to the Free Software
Chris@1295: # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
Chris@1295: 
Chris@1295: class Mailer < ActionMailer::Base
Chris@1295:   layout 'mailer'
Chris@1295:   helper :application
Chris@1295:   helper :issues
Chris@1295:   helper :custom_fields
Chris@1295: 
Chris@1295:   include Redmine::I18n
Chris@1295: 
Chris@1295:   def self.default_url_options
Chris@1295:     { :host => Setting.host_name, :protocol => Setting.protocol }
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email recipients of the added issue.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   issue_add(issue) => Mail::Message object
Chris@1295:   #   Mailer.issue_add(issue).deliver => sends an email to issue recipients
Chris@1295:   def issue_add(issue)
Chris@1295:     redmine_headers 'Project' => issue.project.identifier,
Chris@1295:                     'Issue-Id' => issue.id,
Chris@1295:                     'Issue-Author' => issue.author.login
Chris@1295:     redmine_headers 'Issue-Assignee' => issue.assigned_to.login if issue.assigned_to
Chris@1295:     message_id issue
Chris@1295:     @author = issue.author
Chris@1295:     @issue = issue
Chris@1295:     @issue_url = url_for(:controller => 'issues', :action => 'show', :id => issue)
Chris@1295:     recipients = issue.recipients
Chris@1295:     cc = issue.watcher_recipients - recipients
Chris@1295:     mail :to => recipients,
Chris@1295:       :cc => cc,
Chris@1295:       :subject => "[#{issue.project.name} - #{issue.tracker.name} ##{issue.id}] (#{issue.status.name}) #{issue.subject}"
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email recipients of the edited issue.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   issue_edit(journal) => Mail::Message object
Chris@1295:   #   Mailer.issue_edit(journal).deliver => sends an email to issue recipients
Chris@1295:   def issue_edit(journal)
Chris@1295:     issue = journal.journalized.reload
Chris@1295:     redmine_headers 'Project' => issue.project.identifier,
Chris@1295:                     'Issue-Id' => issue.id,
Chris@1295:                     'Issue-Author' => issue.author.login
Chris@1295:     redmine_headers 'Issue-Assignee' => issue.assigned_to.login if issue.assigned_to
Chris@1295:     message_id journal
Chris@1295:     references issue
Chris@1295:     @author = journal.user
Chris@1295:     recipients = journal.recipients
Chris@1295:     # Watchers in cc
Chris@1295:     cc = journal.watcher_recipients - recipients
Chris@1295:     s = "[#{issue.project.name} - #{issue.tracker.name} ##{issue.id}] "
Chris@1295:     s << "(#{issue.status.name}) " if journal.new_value_for('status_id')
Chris@1295:     s << issue.subject
Chris@1295:     @issue = issue
Chris@1295:     @journal = journal
Chris@1295:     @issue_url = url_for(:controller => 'issues', :action => 'show', :id => issue, :anchor => "change-#{journal.id}")
Chris@1295:     mail :to => recipients,
Chris@1295:       :cc => cc,
Chris@1295:       :subject => s
Chris@1295:   end
Chris@1295: 
Chris@1295:   def reminder(user, issues, days)
Chris@1295:     set_language_if_valid user.language
Chris@1295:     @issues = issues
Chris@1295:     @days = days
Chris@1295:     @issues_url = url_for(:controller => 'issues', :action => 'index',
Chris@1295:                                 :set_filter => 1, :assigned_to_id => user.id,
Chris@1295:                                 :sort => 'due_date:asc')
Chris@1295:     mail :to => user.mail,
Chris@1295:       :subject => l(:mail_subject_reminder, :count => issues.size, :days => days)
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email users belonging to the added document's project.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   document_added(document) => Mail::Message object
Chris@1295:   #   Mailer.document_added(document).deliver => sends an email to the document's project recipients
Chris@1295:   def document_added(document)
Chris@1295:     redmine_headers 'Project' => document.project.identifier
Chris@1295:     @author = User.current
Chris@1295:     @document = document
Chris@1295:     @document_url = url_for(:controller => 'documents', :action => 'show', :id => document)
Chris@1295:     mail :to => document.recipients,
Chris@1295:       :subject => "[#{document.project.name}] #{l(:label_document_new)}: #{document.title}"
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email recipients of a project when an attachements are added.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   attachments_added(attachments) => Mail::Message object
Chris@1295:   #   Mailer.attachments_added(attachments).deliver => sends an email to the project's recipients
Chris@1295:   def attachments_added(attachments)
Chris@1295:     container = attachments.first.container
Chris@1295:     added_to = ''
Chris@1295:     added_to_url = ''
Chris@1295:     @author = attachments.first.author
Chris@1295:     case container.class.name
Chris@1295:     when 'Project'
Chris@1295:       added_to_url = url_for(:controller => 'files', :action => 'index', :project_id => container)
Chris@1295:       added_to = "#{l(:label_project)}: #{container}"
Chris@1295:       recipients = container.project.notified_users.select {|user| user.allowed_to?(:view_files, container.project)}.collect  {|u| u.mail}
Chris@1295:     when 'Version'
Chris@1295:       added_to_url = url_for(:controller => 'files', :action => 'index', :project_id => container.project)
Chris@1295:       added_to = "#{l(:label_version)}: #{container.name}"
Chris@1295:       recipients = container.project.notified_users.select {|user| user.allowed_to?(:view_files, container.project)}.collect  {|u| u.mail}
Chris@1295:     when 'Document'
Chris@1295:       added_to_url = url_for(:controller => 'documents', :action => 'show', :id => container.id)
Chris@1295:       added_to = "#{l(:label_document)}: #{container.title}"
Chris@1295:       recipients = container.recipients
Chris@1295:     end
Chris@1295:     redmine_headers 'Project' => container.project.identifier
Chris@1295:     @attachments = attachments
Chris@1295:     @added_to = added_to
Chris@1295:     @added_to_url = added_to_url
Chris@1295:     mail :to => recipients,
Chris@1295:       :subject => "[#{container.project.name}] #{l(:label_attachment_new)}"
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email recipients of a news' project when a news item is added.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   news_added(news) => Mail::Message object
Chris@1295:   #   Mailer.news_added(news).deliver => sends an email to the news' project recipients
Chris@1295:   def news_added(news)
Chris@1295:     redmine_headers 'Project' => news.project.identifier
Chris@1295:     @author = news.author
Chris@1295:     message_id news
Chris@1295:     @news = news
Chris@1295:     @news_url = url_for(:controller => 'news', :action => 'show', :id => news)
Chris@1295:     mail :to => news.recipients,
Chris@1295:       :subject => "[#{news.project.name}] #{l(:label_news)}: #{news.title}"
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email recipients of a news' project when a news comment is added.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   news_comment_added(comment) => Mail::Message object
Chris@1295:   #   Mailer.news_comment_added(comment) => sends an email to the news' project recipients
Chris@1295:   def news_comment_added(comment)
Chris@1295:     news = comment.commented
Chris@1295:     redmine_headers 'Project' => news.project.identifier
Chris@1295:     @author = comment.author
Chris@1295:     message_id comment
Chris@1295:     @news = news
Chris@1295:     @comment = comment
Chris@1295:     @news_url = url_for(:controller => 'news', :action => 'show', :id => news)
Chris@1295:     mail :to => news.recipients,
Chris@1295:      :cc => news.watcher_recipients,
Chris@1295:      :subject => "Re: [#{news.project.name}] #{l(:label_news)}: #{news.title}"
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email the recipients of the specified message that was posted.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   message_posted(message) => Mail::Message object
Chris@1295:   #   Mailer.message_posted(message).deliver => sends an email to the recipients
Chris@1295:   def message_posted(message)
Chris@1295:     redmine_headers 'Project' => message.project.identifier,
Chris@1295:                     'Topic-Id' => (message.parent_id || message.id)
Chris@1295:     @author = message.author
Chris@1295:     message_id message
Chris@1295:     references message.parent unless message.parent.nil?
Chris@1295:     recipients = message.recipients
Chris@1295:     cc = ((message.root.watcher_recipients + message.board.watcher_recipients).uniq - recipients)
Chris@1295:     @message = message
Chris@1295:     @message_url = url_for(message.event_url)
Chris@1295:     mail :to => recipients,
Chris@1295:       :cc => cc,
Chris@1295:       :subject => "[#{message.board.project.name} - #{message.board.name} - msg#{message.root.id}] #{message.subject}"
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email the recipients of a project of the specified wiki content was added.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   wiki_content_added(wiki_content) => Mail::Message object
Chris@1295:   #   Mailer.wiki_content_added(wiki_content).deliver => sends an email to the project's recipients
Chris@1295:   def wiki_content_added(wiki_content)
Chris@1295:     redmine_headers 'Project' => wiki_content.project.identifier,
Chris@1295:                     'Wiki-Page-Id' => wiki_content.page.id
Chris@1295:     @author = wiki_content.author
Chris@1295:     message_id wiki_content
Chris@1295:     recipients = wiki_content.recipients
Chris@1295:     cc = wiki_content.page.wiki.watcher_recipients - recipients
Chris@1295:     @wiki_content = wiki_content
Chris@1295:     @wiki_content_url = url_for(:controller => 'wiki', :action => 'show',
Chris@1295:                                       :project_id => wiki_content.project,
Chris@1295:                                       :id => wiki_content.page.title)
Chris@1295:     mail :to => recipients,
Chris@1295:       :cc => cc,
Chris@1295:       :subject => "[#{wiki_content.project.name}] #{l(:mail_subject_wiki_content_added, :id => wiki_content.page.pretty_title)}"
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email the recipients of a project of the specified wiki content was updated.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   wiki_content_updated(wiki_content) => Mail::Message object
Chris@1295:   #   Mailer.wiki_content_updated(wiki_content).deliver => sends an email to the project's recipients
Chris@1295:   def wiki_content_updated(wiki_content)
Chris@1295:     redmine_headers 'Project' => wiki_content.project.identifier,
Chris@1295:                     'Wiki-Page-Id' => wiki_content.page.id
Chris@1295:     @author = wiki_content.author
Chris@1295:     message_id wiki_content
Chris@1295:     recipients = wiki_content.recipients
Chris@1295:     cc = wiki_content.page.wiki.watcher_recipients + wiki_content.page.watcher_recipients - recipients
Chris@1295:     @wiki_content = wiki_content
Chris@1295:     @wiki_content_url = url_for(:controller => 'wiki', :action => 'show',
Chris@1295:                                       :project_id => wiki_content.project,
Chris@1295:                                       :id => wiki_content.page.title)
Chris@1295:     @wiki_diff_url = url_for(:controller => 'wiki', :action => 'diff',
Chris@1295:                                    :project_id => wiki_content.project, :id => wiki_content.page.title,
Chris@1295:                                    :version => wiki_content.version)
Chris@1295:     mail :to => recipients,
Chris@1295:       :cc => cc,
Chris@1295:       :subject => "[#{wiki_content.project.name}] #{l(:mail_subject_wiki_content_updated, :id => wiki_content.page.pretty_title)}"
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email the specified user their account information.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   account_information(user, password) => Mail::Message object
Chris@1295:   #   Mailer.account_information(user, password).deliver => sends account information to the user
Chris@1295:   def account_information(user, password)
Chris@1295:     set_language_if_valid user.language
Chris@1295:     @user = user
Chris@1295:     @password = password
Chris@1295:     @login_url = url_for(:controller => 'account', :action => 'login')
Chris@1295:     mail :to => user.mail,
Chris@1295:       :subject => l(:mail_subject_register, Setting.app_title)
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email all active administrators of an account activation request.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   account_activation_request(user) => Mail::Message object
Chris@1295:   #   Mailer.account_activation_request(user).deliver => sends an email to all active administrators
Chris@1295:   def account_activation_request(user)
Chris@1295:     # Send the email to all active administrators
Chris@1295:     recipients = User.active.where(:admin => true).all.collect { |u| u.mail }.compact
Chris@1295:     @user = user
Chris@1295:     @url = url_for(:controller => 'users', :action => 'index',
Chris@1295:                          :status => User::STATUS_REGISTERED,
Chris@1295:                          :sort_key => 'created_on', :sort_order => 'desc')
Chris@1295:     mail :to => recipients,
Chris@1295:       :subject => l(:mail_subject_account_activation_request, Setting.app_title)
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Builds a Mail::Message object used to email the specified user that their account was activated by an administrator.
Chris@1295:   #
Chris@1295:   # Example:
Chris@1295:   #   account_activated(user) => Mail::Message object
Chris@1295:   #   Mailer.account_activated(user).deliver => sends an email to the registered user
Chris@1295:   def account_activated(user)
Chris@1295:     set_language_if_valid user.language
Chris@1295:     @user = user
Chris@1295:     @login_url = url_for(:controller => 'account', :action => 'login')
Chris@1295:     mail :to => user.mail,
Chris@1295:       :subject => l(:mail_subject_register, Setting.app_title)
Chris@1295:   end
Chris@1295: 
Chris@1295:   def lost_password(token)
Chris@1295:     set_language_if_valid(token.user.language)
Chris@1295:     @token = token
Chris@1295:     @url = url_for(:controller => 'account', :action => 'lost_password', :token => token.value)
Chris@1295:     mail :to => token.user.mail,
Chris@1295:       :subject => l(:mail_subject_lost_password, Setting.app_title)
Chris@1295:   end
Chris@1295: 
Chris@1295:   def register(token)
Chris@1295:     set_language_if_valid(token.user.language)
Chris@1295:     @token = token
Chris@1295:     @url = url_for(:controller => 'account', :action => 'activate', :token => token.value)
Chris@1295:     mail :to => token.user.mail,
Chris@1295:       :subject => l(:mail_subject_register, Setting.app_title)
Chris@1295:   end
Chris@1295: 
Chris@1295:   def test_email(user)
Chris@1295:     set_language_if_valid(user.language)
Chris@1295:     @url = url_for(:controller => 'welcome')
Chris@1295:     mail :to => user.mail,
Chris@1295:       :subject => 'Redmine test'
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Overrides default deliver! method to prevent from sending an email
Chris@1295:   # with no recipient, cc or bcc
Chris@1295:   def deliver!(mail = @mail)
Chris@1295:     set_language_if_valid @initial_language
Chris@1295:     return false if (recipients.nil? || recipients.empty?) &&
Chris@1295:                     (cc.nil? || cc.empty?) &&
Chris@1295:                     (bcc.nil? || bcc.empty?)
Chris@1295: 
Chris@1295: 
Chris@1295:     # Log errors when raise_delivery_errors is set to false, Rails does not
Chris@1295:     raise_errors = self.class.raise_delivery_errors
Chris@1295:     self.class.raise_delivery_errors = true
Chris@1295:     begin
Chris@1295:       return super(mail)
Chris@1295:     rescue Exception => e
Chris@1295:       if raise_errors
Chris@1295:         raise e
Chris@1295:       elsif mylogger
Chris@1295:         mylogger.error "The following error occured while sending email notification: \"#{e.message}\". Check your configuration in config/configuration.yml."
Chris@1295:       end
Chris@1295:     ensure
Chris@1295:       self.class.raise_delivery_errors = raise_errors
Chris@1295:     end
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Sends reminders to issue assignees
Chris@1295:   # Available options:
Chris@1295:   # * :days     => how many days in the future to remind about (defaults to 7)
Chris@1295:   # * :tracker  => id of tracker for filtering issues (defaults to all trackers)
Chris@1295:   # * :project  => id or identifier of project to process (defaults to all projects)
Chris@1295:   # * :users    => array of user/group ids who should be reminded
Chris@1295:   def self.reminders(options={})
Chris@1295:     days = options[:days] || 7
Chris@1295:     project = options[:project] ? Project.find(options[:project]) : nil
Chris@1295:     tracker = options[:tracker] ? Tracker.find(options[:tracker]) : nil
Chris@1295:     user_ids = options[:users]
Chris@1295: 
Chris@1295:     scope = Issue.open.where("#{Issue.table_name}.assigned_to_id IS NOT NULL" +
Chris@1295:       " AND #{Project.table_name}.status = #{Project::STATUS_ACTIVE}" +
Chris@1295:       " AND #{Issue.table_name}.due_date <= ?", days.day.from_now.to_date
Chris@1295:     )
Chris@1295:     scope = scope.where(:assigned_to_id => user_ids) if user_ids.present?
Chris@1295:     scope = scope.where(:project_id => project.id) if project
Chris@1295:     scope = scope.where(:tracker_id => tracker.id) if tracker
Chris@1295: 
Chris@1295:     issues_by_assignee = scope.includes(:status, :assigned_to, :project, :tracker).all.group_by(&:assigned_to)
Chris@1295:     issues_by_assignee.keys.each do |assignee|
Chris@1295:       if assignee.is_a?(Group)
Chris@1295:         assignee.users.each do |user|
Chris@1295:           issues_by_assignee[user] ||= []
Chris@1295:           issues_by_assignee[user] += issues_by_assignee[assignee]
Chris@1295:         end
Chris@1295:       end
Chris@1295:     end
Chris@1295: 
Chris@1295:     issues_by_assignee.each do |assignee, issues|
Chris@1295:       reminder(assignee, issues, days).deliver if assignee.is_a?(User) && assignee.active?
Chris@1295:     end
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Activates/desactivates email deliveries during +block+
Chris@1295:   def self.with_deliveries(enabled = true, &block)
Chris@1295:     was_enabled = ActionMailer::Base.perform_deliveries
Chris@1295:     ActionMailer::Base.perform_deliveries = !!enabled
Chris@1295:     yield
Chris@1295:   ensure
Chris@1295:     ActionMailer::Base.perform_deliveries = was_enabled
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Sends emails synchronously in the given block
Chris@1295:   def self.with_synched_deliveries(&block)
Chris@1295:     saved_method = ActionMailer::Base.delivery_method
Chris@1295:     if m = saved_method.to_s.match(%r{^async_(.+)$})
Chris@1295:       synched_method = m[1]
Chris@1295:       ActionMailer::Base.delivery_method = synched_method.to_sym
Chris@1295:       ActionMailer::Base.send "#{synched_method}_settings=", ActionMailer::Base.send("async_#{synched_method}_settings")
Chris@1295:     end
Chris@1295:     yield
Chris@1295:   ensure
Chris@1295:     ActionMailer::Base.delivery_method = saved_method
Chris@1295:   end
Chris@1295: 
Chris@1295:   def mail(headers={})
Chris@1295:     headers.merge! 'X-Mailer' => 'Redmine',
Chris@1295:             'X-Redmine-Host' => Setting.host_name,
Chris@1295:             'X-Redmine-Site' => Setting.app_title,
Chris@1295:             'X-Auto-Response-Suppress' => 'OOF',
Chris@1295:             'Auto-Submitted' => 'auto-generated',
Chris@1295:             'From' => Setting.mail_from,
Chris@1295:             'List-Id' => "<#{Setting.mail_from.to_s.gsub('@', '.')}>"
Chris@1295: 
Chris@1295:     # Removes the author from the recipients and cc
Chris@1295:     # if he doesn't want to receive notifications about what he does
Chris@1295:     if @author && @author.logged? && @author.pref[:no_self_notified]
Chris@1295:       headers[:to].delete(@author.mail) if headers[:to].is_a?(Array)
Chris@1295:       headers[:cc].delete(@author.mail) if headers[:cc].is_a?(Array)
Chris@1295:     end
Chris@1295: 
Chris@1295:     if @author && @author.logged?
Chris@1295:       redmine_headers 'Sender' => @author.login
Chris@1295:     end
Chris@1295: 
Chris@1295:     # Blind carbon copy recipients
Chris@1295:     if Setting.bcc_recipients?
Chris@1295:       headers[:bcc] = [headers[:to], headers[:cc]].flatten.uniq.reject(&:blank?)
Chris@1295:       headers[:to] = nil
Chris@1295:       headers[:cc] = nil
Chris@1295:     end
Chris@1295: 
Chris@1295:     if @message_id_object
Chris@1295:       headers[:message_id] = "<#{self.class.message_id_for(@message_id_object)}>"
Chris@1295:     end
Chris@1295:     if @references_objects
Chris@1295:       headers[:references] = @references_objects.collect {|o| "<#{self.class.message_id_for(o)}>"}.join(' ')
Chris@1295:     end
Chris@1295: 
Chris@1295:     super headers do |format|
Chris@1295:       format.text
Chris@1295:       format.html unless Setting.plain_text_mail?
Chris@1295:     end
Chris@1295: 
Chris@1295:     set_language_if_valid @initial_language
Chris@1295:   end
Chris@1295: 
Chris@1295:   def initialize(*args)
Chris@1295:     @initial_language = current_language
Chris@1295:     set_language_if_valid Setting.default_language
Chris@1295:     super
Chris@1295:   end
Chris@1295:   
Chris@1295:   def self.deliver_mail(mail)
Chris@1295:     return false if mail.to.blank? && mail.cc.blank? && mail.bcc.blank?
Chris@1295:     super
Chris@1295:   end
Chris@1295: 
Chris@1295:   def self.method_missing(method, *args, &block)
Chris@1295:     if m = method.to_s.match(%r{^deliver_(.+)$})
Chris@1295:       ActiveSupport::Deprecation.warn "Mailer.deliver_#{m[1]}(*args) is deprecated. Use Mailer.#{m[1]}(*args).deliver instead."
Chris@1295:       send(m[1], *args).deliver
Chris@1295:     else
Chris@1295:       super
Chris@1295:     end
Chris@1295:   end
Chris@1295: 
Chris@1295:   private
Chris@1295: 
Chris@1295:   # Appends a Redmine header field (name is prepended with 'X-Redmine-')
Chris@1295:   def redmine_headers(h)
Chris@1295:     h.each { |k,v| headers["X-Redmine-#{k}"] = v.to_s }
Chris@1295:   end
Chris@1295: 
Chris@1295:   # Returns a predictable Message-Id for the given object
Chris@1295:   def self.message_id_for(object)
Chris@1295:     # id + timestamp should reduce the odds of a collision
Chris@1295:     # as far as we don't send multiple emails for the same object
Chris@1295:     timestamp = object.send(object.respond_to?(:created_on) ? :created_on : :updated_on)
Chris@1295:     hash = "redmine.#{object.class.name.demodulize.underscore}-#{object.id}.#{timestamp.strftime("%Y%m%d%H%M%S")}"
Chris@1295:     host = Setting.mail_from.to_s.gsub(%r{^.*@}, '')
Chris@1295:     host = "#{::Socket.gethostname}.redmine" if host.empty?
Chris@1295:     "#{hash}@#{host}"
Chris@1295:   end
Chris@1295: 
Chris@1295:   def message_id(object)
Chris@1295:     @message_id_object = object
Chris@1295:   end
Chris@1295: 
Chris@1295:   def references(object)
Chris@1295:     @references_objects ||= []
Chris@1295:     @references_objects << object
Chris@1295:   end
Chris@1295: 
Chris@1295:   def mylogger
Chris@1295:     Rails.logger
Chris@1295:   end
Chris@1295: end