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# redMine - project management software
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# Copyright (C) 2006-2007 Jean-Philippe Lang
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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class MailHandler < ActionMailer::Base
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include ActionView::Helpers::SanitizeHelper
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include Redmine::I18n
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class UnauthorizedAction < StandardError; end
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class MissingInformation < StandardError; end
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attr_reader :email, :user
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def self.receive(email, options={})
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@@handler_options = options.dup
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@@handler_options[:issue] ||= {}
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@@handler_options[:allow_override] = @@handler_options[:allow_override].split(',').collect(&:strip) if @@handler_options[:allow_override].is_a?(String)
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@@handler_options[:allow_override] ||= []
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# Project needs to be overridable if not specified
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@@handler_options[:allow_override] << 'project' unless @@handler_options[:issue].has_key?(:project)
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# Status overridable by default
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@@handler_options[:allow_override] << 'status' unless @@handler_options[:issue].has_key?(:status)
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@@handler_options[:no_permission_check] = (@@handler_options[:no_permission_check].to_s == '1' ? true : false)
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super email
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end
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# Processes incoming emails
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# Returns the created object (eg. an issue, a message) or false
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def receive(email)
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@email = email
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sender_email = email.from.to_a.first.to_s.strip
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# Ignore emails received from the application emission address to avoid hell cycles
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if sender_email.downcase == Setting.mail_from.to_s.strip.downcase
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logger.info "MailHandler: ignoring email from Redmine emission address [#{sender_email}]" if logger && logger.info
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return false
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end
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@user = User.find_by_mail(sender_email) if sender_email.present?
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if @user && !@user.active?
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logger.info "MailHandler: ignoring email from non-active user [#{@user.login}]" if logger && logger.info
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return false
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end
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if @user.nil?
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# Email was submitted by an unknown user
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case @@handler_options[:unknown_user]
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when 'accept'
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@user = User.anonymous
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when 'create'
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@user = MailHandler.create_user_from_email(email)
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if @user
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logger.info "MailHandler: [#{@user.login}] account created" if logger && logger.info
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Mailer.deliver_account_information(@user, @user.password)
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else
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logger.error "MailHandler: could not create account for [#{sender_email}]" if logger && logger.error
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return false
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end
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else
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# Default behaviour, emails from unknown users are ignored
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logger.info "MailHandler: ignoring email from unknown user [#{sender_email}]" if logger && logger.info
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return false
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end
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end
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User.current = @user
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dispatch
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end
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private
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MESSAGE_ID_RE = %r{^<redmine\.([a-z0-9_]+)\-(\d+)\.\d+@}
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ISSUE_REPLY_SUBJECT_RE = %r{\[[^\]]*#(\d+)\]}
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MESSAGE_REPLY_SUBJECT_RE = %r{\[[^\]]*msg(\d+)\]}
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def dispatch
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headers = [email.in_reply_to, email.references].flatten.compact
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if headers.detect {|h| h.to_s =~ MESSAGE_ID_RE}
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klass, object_id = $1, $2.to_i
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method_name = "receive_#{klass}_reply"
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if self.class.private_instance_methods.collect(&:to_s).include?(method_name)
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send method_name, object_id
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else
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# ignoring it
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end
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elsif m = email.subject.match(ISSUE_REPLY_SUBJECT_RE)
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receive_issue_reply(m[1].to_i)
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elsif m = email.subject.match(MESSAGE_REPLY_SUBJECT_RE)
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receive_message_reply(m[1].to_i)
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else
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receive_issue
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end
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rescue ActiveRecord::RecordInvalid => e
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# TODO: send a email to the user
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logger.error e.message if logger
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false
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rescue MissingInformation => e
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logger.error "MailHandler: missing information from #{user}: #{e.message}" if logger
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false
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rescue UnauthorizedAction => e
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logger.error "MailHandler: unauthorized attempt from #{user}" if logger
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false
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end
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# Creates a new issue
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def receive_issue
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project = target_project
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# check permission
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unless @@handler_options[:no_permission_check]
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raise UnauthorizedAction unless user.allowed_to?(:add_issues, project)
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end
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issue = Issue.new(:author => user, :project => project)
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issue.safe_attributes = issue_attributes_from_keywords(issue)
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issue.safe_attributes = {'custom_field_values' => custom_field_values_from_keywords(issue)}
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issue.subject = email.subject.to_s.chomp[0,255]
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if issue.subject.blank?
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issue.subject = '(no subject)'
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end
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issue.description = cleaned_up_text_body
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# add To and Cc as watchers before saving so the watchers can reply to Redmine
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add_watchers(issue)
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issue.save!
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add_attachments(issue)
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logger.info "MailHandler: issue ##{issue.id} created by #{user}" if logger && logger.info
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issue
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end
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# Adds a note to an existing issue
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def receive_issue_reply(issue_id)
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issue = Issue.find_by_id(issue_id)
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return unless issue
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# check permission
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unless @@handler_options[:no_permission_check]
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raise UnauthorizedAction unless user.allowed_to?(:add_issue_notes, issue.project) || user.allowed_to?(:edit_issues, issue.project)
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end
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journal = issue.init_journal(user, cleaned_up_text_body)
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issue.safe_attributes = issue_attributes_from_keywords(issue)
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issue.safe_attributes = {'custom_field_values' => custom_field_values_from_keywords(issue)}
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add_attachments(issue)
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issue.save!
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logger.info "MailHandler: issue ##{issue.id} updated by #{user}" if logger && logger.info
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journal
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end
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# Reply will be added to the issue
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def receive_journal_reply(journal_id)
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journal = Journal.find_by_id(journal_id)
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if journal && journal.journalized_type == 'Issue'
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receive_issue_reply(journal.journalized_id)
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end
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end
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# Receives a reply to a forum message
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def receive_message_reply(message_id)
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message = Message.find_by_id(message_id)
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if message
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message = message.root
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unless @@handler_options[:no_permission_check]
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raise UnauthorizedAction unless user.allowed_to?(:add_messages, message.project)
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end
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if !message.locked?
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reply = Message.new(:subject => email.subject.gsub(%r{^.*msg\d+\]}, '').strip,
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:content => cleaned_up_text_body)
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reply.author = user
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reply.board = message.board
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message.children << reply
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add_attachments(reply)
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reply
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else
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logger.info "MailHandler: ignoring reply from [#{sender_email}] to a locked topic" if logger && logger.info
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end
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end
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end
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def add_attachments(obj)
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if email.has_attachments?
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email.attachments.each do |attachment|
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Attachment.create(:container => obj,
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:file => attachment,
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:author => user,
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:content_type => attachment.content_type)
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end
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end
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end
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# Adds To and Cc as watchers of the given object if the sender has the
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# appropriate permission
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def add_watchers(obj)
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if user.allowed_to?("add_#{obj.class.name.underscore}_watchers".to_sym, obj.project)
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addresses = [email.to, email.cc].flatten.compact.uniq.collect {|a| a.strip.downcase}
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unless addresses.empty?
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watchers = User.active.find(:all, :conditions => ['LOWER(mail) IN (?)', addresses])
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watchers.each {|w| obj.add_watcher(w)}
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end
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end
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end
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def get_keyword(attr, options={})
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@keywords ||= {}
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if @keywords.has_key?(attr)
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@keywords[attr]
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else
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@keywords[attr] = begin
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if (options[:override] || @@handler_options[:allow_override].include?(attr.to_s)) && (v = extract_keyword!(plain_text_body, attr, options[:format]))
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v
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elsif !@@handler_options[:issue][attr].blank?
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@@handler_options[:issue][attr]
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end
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end
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end
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end
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# Destructively extracts the value for +attr+ in +text+
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# Returns nil if no matching keyword found
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def extract_keyword!(text, attr, format=nil)
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keys = [attr.to_s.humanize]
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if attr.is_a?(Symbol)
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keys << l("field_#{attr}", :default => '', :locale => user.language) if user
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keys << l("field_#{attr}", :default => '', :locale => Setting.default_language)
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end
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keys.reject! {|k| k.blank?}
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keys.collect! {|k| Regexp.escape(k)}
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format ||= '.+'
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text.gsub!(/^(#{keys.join('|')})[ \t]*:[ \t]*(#{format})\s*$/i, '')
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$2 && $2.strip
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end
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def target_project
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# TODO: other ways to specify project:
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# * parse the email To field
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# * specific project (eg. Setting.mail_handler_target_project)
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target = Project.find_by_identifier(get_keyword(:project))
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raise MissingInformation.new('Unable to determine target project') if target.nil?
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target
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end
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# Returns a Hash of issue attributes extracted from keywords in the email body
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def issue_attributes_from_keywords(issue)
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assigned_to = (k = get_keyword(:assigned_to, :override => true)) && find_user_from_keyword(k)
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assigned_to = nil if assigned_to && !issue.assignable_users.include?(assigned_to)
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{
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'tracker_id' => ((k = get_keyword(:tracker)) && issue.project.trackers.find_by_name(k).try(:id)) || issue.project.trackers.find(:first).try(:id),
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'status_id' => (k = get_keyword(:status)) && IssueStatus.find_by_name(k).try(:id),
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'priority_id' => (k = get_keyword(:priority)) && IssuePriority.find_by_name(k).try(:id),
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'category_id' => (k = get_keyword(:category)) && issue.project.issue_categories.find_by_name(k).try(:id),
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'assigned_to_id' => assigned_to.try(:id),
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'fixed_version_id' => (k = get_keyword(:fixed_version, :override => true)) && issue.project.shared_versions.find_by_name(k).try(:id),
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'start_date' => get_keyword(:start_date, :override => true, :format => '\d{4}-\d{2}-\d{2}'),
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'due_date' => get_keyword(:due_date, :override => true, :format => '\d{4}-\d{2}-\d{2}'),
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'estimated_hours' => get_keyword(:estimated_hours, :override => true),
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'done_ratio' => get_keyword(:done_ratio, :override => true, :format => '(\d|10)?0')
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}.delete_if {|k, v| v.blank? }
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end
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# Returns a Hash of issue custom field values extracted from keywords in the email body
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def custom_field_values_from_keywords(customized)
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customized.custom_field_values.inject({}) do |h, v|
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if value = get_keyword(v.custom_field.name, :override => true)
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h[v.custom_field.id.to_s] = value
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end
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h
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end
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end
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# Returns the text/plain part of the email
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# If not found (eg. HTML-only email), returns the body with tags removed
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def plain_text_body
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return @plain_text_body unless @plain_text_body.nil?
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parts = @email.parts.collect {|c| (c.respond_to?(:parts) && !c.parts.empty?) ? c.parts : c}.flatten
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if parts.empty?
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parts << @email
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end
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plain_text_part = parts.detect {|p| p.content_type == 'text/plain'}
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if plain_text_part.nil?
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# no text/plain part found, assuming html-only email
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# strip html tags and remove doctype directive
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@plain_text_body = strip_tags(@email.body.to_s)
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@plain_text_body.gsub! %r{^<!DOCTYPE .*$}, ''
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else
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@plain_text_body = plain_text_part.body.to_s
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end
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@plain_text_body.strip!
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@plain_text_body
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end
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def cleaned_up_text_body
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cleanup_body(plain_text_body)
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end
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def self.full_sanitizer
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@full_sanitizer ||= HTML::FullSanitizer.new
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end
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# Creates a user account for the +email+ sender
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def self.create_user_from_email(email)
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addr = email.from_addrs.to_a.first
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if addr && !addr.spec.blank?
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user = User.new
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user.mail = addr.spec
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names = addr.name.blank? ? addr.spec.gsub(/@.*$/, '').split('.') : addr.name.split
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user.firstname = names.shift
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user.lastname = names.join(' ')
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user.lastname = '-' if user.lastname.blank?
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user.login = user.mail
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user.password = ActiveSupport::SecureRandom.hex(5)
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user.language = Setting.default_language
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user.save ? user : nil
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end
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end
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private
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# Removes the email body of text after the truncation configurations.
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def cleanup_body(body)
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delimiters = Setting.mail_handler_body_delimiters.to_s.split(/[\r\n]+/).reject(&:blank?).map {|s| Regexp.escape(s)}
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unless delimiters.empty?
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regex = Regexp.new("^[> ]*(#{ delimiters.join('|') })\s*[\r\n].*", Regexp::MULTILINE)
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body = body.gsub(regex, '')
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end
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body.strip
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end
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def find_user_from_keyword(keyword)
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user ||= User.find_by_mail(keyword)
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user ||= User.find_by_login(keyword)
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if user.nil? && keyword.match(/ /)
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firstname, lastname = *(keyword.split) # "First Last Throwaway"
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user ||= User.find_by_firstname_and_lastname(firstname, lastname)
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end
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user
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end
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end
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