Adds basic support for issue creation via email (#1110).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1568 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/mail_handler.rb

@@ -16,25 +16,119 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 class MailHandler < ActionMailer::Base
+
+  class UnauthorizedAction < StandardError; end
+  class MissingInformation < StandardError; end
+  
+  attr_reader :email, :user
+
+  def self.receive(email, options={})
+    @@handler_options = options
+    super email
+  end
   
   # Processes incoming emails
-  # Currently, it only supports adding a note to an existing issue
-  # by replying to the initial notification message
   def receive(email)
-    # find related issue by parsing the subject
-    m = email.subject.match %r{\[.*#(\d+)\]}
-    return unless m
-    issue = Issue.find_by_id(m[1])
-    return unless issue
-    
-    # find user
-    user = User.find_active(:first, :conditions => {:mail => email.from.first})
-    return unless user
+    @email = email
+    @user = User.find_active(:first, :conditions => {:mail => email.from.first})
+    unless @user
+      # Unknown user => the email is ignored
+      # TODO: ability to create the user's account
+      logger.info "MailHandler: email submitted by unknown user [#{email.from.first}]" if logger && logger.info
+      return false
+    end
+    User.current = @user
+    dispatch
+  end
+  
+  private
+
+  ISSUE_REPLY_SUBJECT_RE = %r{\[[^\]]+#(\d+)\]}
+  
+  def dispatch
+    if m = email.subject.match(ISSUE_REPLY_SUBJECT_RE)
+      receive_issue_update(m[1].to_i)
+    else
+      receive_issue
+    end
+  rescue ActiveRecord::RecordInvalid => e
+    # TODO: send a email to the user
+    logger.error e.message if logger
+    false
+  rescue MissingInformation => e
+    logger.error "MailHandler: missing information from #{user}: #{e.message}" if logger
+    false
+  rescue UnauthorizedAction => e
+    logger.error "MailHandler: unauthorized attempt from #{user}" if logger
+    false
+  end
+  
+  # Creates a new issue
+  def receive_issue
+    project = target_project
+    # TODO: make the tracker configurable
+    tracker = project.trackers.find(:first)
     # check permission
-    return unless user.allowed_to?(:add_issue_notes, issue.project)
-    
+    raise UnauthorizedAction unless user.allowed_to?(:add_issues, project)
+    issue = Issue.new(:author => user, :project => project, :tracker => tracker)
+    issue.subject = email.subject.chomp
+    issue.description = email.plain_text_body.chomp
+    issue.save!
+    add_attachments(issue)
+    logger.info "MailHandler: issue ##{issue.id} created by #{user}" if logger && logger.info
+    Mailer.deliver_issue_add(issue) if Setting.notified_events.include?('issue_added')
+    issue
+  end
+  
+  def target_project
+    # TODO: other ways to specify project:
+    # * parse the email To field
+    # * specific project (eg. Setting.mail_handler_target_project)
+    identifier = if @@handler_options[:project]
+                   @@handler_options[:project]
+                 elsif email.plain_text_body =~ %r{^Project:[ \t]*(.+)$}i
+                    $1
+                 end
+                 
+    target = Project.find_by_identifier(identifier.to_s)
+    raise MissingInformation.new('Unable to determine target project') if target.nil?
+    target
+  end
+  
+  # Adds a note to an existing issue
+  def receive_issue_update(issue_id)
+    issue = Issue.find_by_id(issue_id)
+    return unless issue
+    # check permission
+    raise UnauthorizedAction unless user.allowed_to?(:add_issue_notes, issue.project) || user.allowed_to?(:edit_issues, issue.project)
     # add the note
-    issue.init_journal(user, email.body.chomp)
-    issue.save
+    journal = issue.init_journal(user, email.plain_text_body.chomp)
+    add_attachments(journal)
+    issue.save!
+    logger.info "MailHandler: issue ##{issue.id} updated by #{user}" if logger && logger.info
+    Mailer.deliver_issue_edit(journal) if Setting.notified_events.include?('issue_updated')
+    journal
+  end
+  
+  def add_attachments(obj)
+    if email.has_attachments?
+      email.attachments.each do |attachment|
+        Attachment.create(:container => obj,
+                          :file => attachment,
+                          :author => user,
+                          :content_type => attachment.content_type)
+      end
+    end
   end
 end
+
+class TMail::Mail
+  # Returns body of the first plain text part found if any
+  def plain_text_body
+    return @plain_text_body unless @plain_text_body.nil?
+    p = self.parts.collect {|c| (c.respond_to?(:parts) && !c.parts.empty?) ? c.parts : c}.flatten
+    plain = p.detect {|c| c.content_type == 'text/plain'}
+    @plain_text_body = plain.nil? ? self.body : plain.body
+  end
+end
+