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# redMine - project management software

# Copyright (C) 2006-2007  Jean-Philippe Lang

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; either version 2

# of the License, or (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

require 'ar_condition'

class Mailer < ActionMailer::Base

  layout 'mailer'

  helper :application

  helper :issues

  helper :custom_fields

  include ActionController::UrlWriter

  include Redmine::I18n

  def self.default_url_options

    h = Setting.host_name

    h = h.to_s.gsub(%r{\/.*$}, '') unless Redmine::Utils.relative_url_root.blank?

    { :host => h, :protocol => Setting.protocol }

  end

  # Builds a tmail object used to email the specified user that he was added to a project

  #

  # Example:

  #   add_to_project(user) => tmail object

  #   Mailer.deliver_add_to_project(user) => sends an email to the registered user

  def added_to_project(member, project)

    user = User.find(member.user_id)

    set_language_if_valid user.language

    recipients user.mail

    subject l(:mail_subject_added_to_project, Setting.app_title)

    body :project_url => url_for(:controller => 'projects', :action => 'show', :id => project.id),

        :project_name => project.name

    render_multipart('added_to_project', body)

  end

  # Builds a tmail object used to email recipients of the added issue.

  #

  # Example:

  #   issue_add(issue) => tmail object

  #   Mailer.deliver_issue_add(issue) => sends an email to issue recipients

  def issue_add(issue)

    redmine_headers 'Project' => issue.project.identifier,

                    'Issue-Id' => issue.id,

                    'Issue-Author' => issue.author.login

    redmine_headers 'Issue-Assignee' => issue.assigned_to.login if issue.assigned_to

    message_id issue

    recipients issue.recipients

    cc(issue.watcher_recipients - @recipients)

    subject "[#{issue.project.name} - #{issue.tracker.name} ##{issue.id}] (#{issue.status.name}) #{issue.subject}"

    body :issue => issue,

         :issue_url => url_for(:controller => 'issues', :action => 'show', :id => issue)

    render_multipart('issue_add', body)

  end

  # Builds a tmail object used to email recipients of the edited issue.

  #

  # Example:

  #   issue_edit(journal) => tmail object

  #   Mailer.deliver_issue_edit(journal) => sends an email to issue recipients

  def issue_edit(journal)

    issue = journal.journalized.reload

    redmine_headers 'Project' => issue.project.identifier,

                    'Issue-Id' => issue.id,

                    'Issue-Author' => issue.author.login

    redmine_headers 'Issue-Assignee' => issue.assigned_to.login if issue.assigned_to

    message_id journal

    references issue

    @author = journal.user

    recipients issue.recipients

    # Watchers in cc

    cc(issue.watcher_recipients - @recipients)

    s = "[#{issue.project.name} - #{issue.tracker.name} ##{issue.id}] "

    s << "(#{issue.status.name}) " if journal.new_value_for('status_id')

    s << issue.subject

    subject s

    body :issue => issue,

         :journal => journal,

         :issue_url => url_for(:controller => 'issues', :action => 'show', :id => issue)

    render_multipart('issue_edit', body)

  end

  def reminder(user, issues, days)

    set_language_if_valid user.language

    recipients user.mail

    subject l(:mail_subject_reminder, :count => issues.size, :days => days)

    body :issues => issues,

         :days => days,

         :issues_url => url_for(:controller => 'issues', :action => 'index', :set_filter => 1, :assigned_to_id => user.id, :sort_key => 'due_date', :sort_order => 'asc')

    render_multipart('reminder', body)

  end

  # Builds a tmail object used to email users belonging to the added document's project.

  #

  # Example:

  #   document_added(document) => tmail object

  #   Mailer.deliver_document_added(document) => sends an email to the document's project recipients

  def document_added(document)

    redmine_headers 'Project' => document.project.identifier

    recipients document.recipients

    subject "[#{document.project.name}] #{l(:label_document_new)}: #{document.title}"

    body :document => document,

         :document_url => url_for(:controller => 'documents', :action => 'show', :id => document)

    render_multipart('document_added', body)

  end

  # Builds a tmail object used to email recipients of a project when an attachements are added.

  #

  # Example:

  #   attachments_added(attachments) => tmail object

  #   Mailer.deliver_attachments_added(attachments) => sends an email to the project's recipients

  def attachments_added(attachments)

    container = attachments.first.container

    added_to = ''

    added_to_url = ''

    case container.class.name

    when 'Project'

      added_to_url = url_for(:controller => 'projects', :action => 'list_files', :id => container)

      added_to = "#{l(:label_project)}: #{container}"

      recipients container.project.notified_users.select {|user| user.allowed_to?(:view_files, container.project)}.collect  {|u| u.mail}

    when 'Version'

      added_to_url = url_for(:controller => 'projects', :action => 'list_files', :id => container.project_id)

      added_to = "#{l(:label_version)}: #{container.name}"

      recipients container.project.notified_users.select {|user| user.allowed_to?(:view_files, container.project)}.collect  {|u| u.mail}

    when 'Document'

      added_to_url = url_for(:controller => 'documents', :action => 'show', :id => container.id)

      added_to = "#{l(:label_document)}: #{container.title}"

      recipients container.recipients

    end

    redmine_headers 'Project' => container.project.identifier

    subject "[#{container.project.name}] #{l(:label_attachment_new)}"

    body :attachments => attachments,

         :added_to => added_to,

         :added_to_url => added_to_url

    render_multipart('attachments_added', body)

  end

  # Builds a tmail object used to email recipients of a news' project when a news item is added.

  #

  # Example:

  #   news_added(news) => tmail object

  #   Mailer.deliver_news_added(news) => sends an email to the news' project recipients

  def news_added(news)

    redmine_headers 'Project' => news.project.identifier

    message_id news

    recipients news.recipients

    subject "[#{news.project.name}] #{l(:label_news)}: #{news.title}"

    body :news => news,

         :news_url => url_for(:controller => 'news', :action => 'show', :id => news)

    render_multipart('news_added', body)

  end

  # Builds a tmail object used to email the recipients of the specified message that was posted. 

  #

  # Example:

  #   message_posted(message) => tmail object

  #   Mailer.deliver_message_posted(message) => sends an email to the recipients

  def message_posted(message)

    redmine_headers 'Project' => message.project.identifier,

                    'Topic-Id' => (message.parent_id || message.id)

    message_id message

    references message.parent unless message.parent.nil?

    recipients(message.recipients)

    cc((message.root.watcher_recipients + message.board.watcher_recipients).uniq - @recipients)

    subject "[#{message.board.project.name} - #{message.board.name} - msg#{message.root.id}] #{message.subject}"

    body :message => message,

         :message_url => url_for(message.event_url)

    render_multipart('message_posted', body)

  end

  # Builds a tmail object used to email the recipients of a project of the specified wiki content was added. 

  #

  # Example:

  #   wiki_content_added(wiki_content) => tmail object

  #   Mailer.deliver_wiki_content_added(wiki_content) => sends an email to the project's recipients

  def wiki_content_added(wiki_content)

    redmine_headers 'Project' => wiki_content.project.identifier,

                    'Wiki-Page-Id' => wiki_content.page.id

    message_id wiki_content

    recipients wiki_content.recipients

    cc(wiki_content.page.wiki.watcher_recipients - recipients)

    subject "[#{wiki_content.project.name}] #{l(:mail_subject_wiki_content_added, :id => wiki_content.page.pretty_title)}"

    body :wiki_content => wiki_content,

         :wiki_content_url => url_for(:controller => 'wiki', :action => 'show', :project_id => wiki_content.project, :id => wiki_content.page.title)

    render_multipart('wiki_content_added', body)

  end

  # Builds a tmail object used to email the recipients of a project of the specified wiki content was updated. 

  #

  # Example:

  #   wiki_content_updated(wiki_content) => tmail object

  #   Mailer.deliver_wiki_content_updated(wiki_content) => sends an email to the project's recipients

  def wiki_content_updated(wiki_content)

    redmine_headers 'Project' => wiki_content.project.identifier,

                    'Wiki-Page-Id' => wiki_content.page.id

    message_id wiki_content

    recipients wiki_content.recipients

    cc(wiki_content.page.wiki.watcher_recipients + wiki_content.page.watcher_recipients - recipients)

    subject "[#{wiki_content.project.name}] #{l(:mail_subject_wiki_content_updated, :id => wiki_content.page.pretty_title)}"

    body :wiki_content => wiki_content,

         :wiki_content_url => url_for(:controller => 'wiki', :action => 'show', :project_id => wiki_content.project, :id => wiki_content.page.title),

         :wiki_diff_url => url_for(:controller => 'wiki', :action => 'diff', :project_id => wiki_content.project, :id => wiki_content.page.title, :version => wiki_content.version)

    render_multipart('wiki_content_updated', body)

  end

  # Builds a tmail object used to email the specified user their account information.

  #

  # Example:

  #   account_information(user, password) => tmail object

  #   Mailer.deliver_account_information(user, password) => sends account information to the user

  def account_information(user, password)

    set_language_if_valid user.language

    recipients user.mail

    subject l(:mail_subject_register, Setting.app_title)

    body :user => user,

         :password => password,

         :login_url => url_for(:controller => 'account', :action => 'login')

    render_multipart('account_information', body)

  end

  # Builds a tmail object used to email all active administrators of an account activation request.

  #

  # Example:

  #   account_activation_request(user) => tmail object

  #   Mailer.deliver_account_activation_request(user)=> sends an email to all active administrators

  def account_activation_request(user)

    # Send the email to all active administrators

    recipients User.active.find(:all, :conditions => {:admin => true}).collect { |u| u.mail }.compact

    subject l(:mail_subject_account_activation_request, Setting.app_title)

    body :user => user,

         :url => url_for(:controller => 'users', :action => 'index', :status => User::STATUS_REGISTERED, :sort_key => 'created_on', :sort_order => 'desc')

    render_multipart('account_activation_request', body)

  end

  # Builds a tmail object used to email the specified user that their account was activated by an administrator.

  #

  # Example:

  #   account_activated(user) => tmail object

  #   Mailer.deliver_account_activated(user) => sends an email to the registered user

  def account_activated(user)

    set_language_if_valid user.language

    recipients user.mail

    subject l(:mail_subject_register, Setting.app_title)

    body :user => user,

         :login_url => url_for(:controller => 'account', :action => 'login')

    render_multipart('account_activated', body)

  end

  def lost_password(token)

    set_language_if_valid(token.user.language)

    recipients token.user.mail

    subject l(:mail_subject_lost_password, Setting.app_title)

    body :token => token,

         :url => url_for(:controller => 'account', :action => 'lost_password', :token => token.value)

    render_multipart('lost_password', body)

  end

  def register(token)

    set_language_if_valid(token.user.language)

    recipients token.user.mail

    subject l(:mail_subject_register, Setting.app_title)

    body :token => token,

         :url => url_for(:controller => 'account', :action => 'activate', :token => token.value)

    render_multipart('register', body)

  end

  def test(user)

    set_language_if_valid(user.language)

    recipients user.mail

    subject 'Redmine test'

    body :url => url_for(:controller => 'welcome')

    render_multipart('test', body)

  end

  # Overrides default deliver! method to prevent from sending an email

  # with no recipient, cc or bcc

  def deliver!(mail = @mail)

    set_language_if_valid @initial_language

    return false if (recipients.nil? || recipients.empty?) &&

                    (cc.nil? || cc.empty?) &&

                    (bcc.nil? || bcc.empty?)

    # Set Message-Id and References

    if @message_id_object

      mail.message_id = self.class.message_id_for(@message_id_object)

    end

    if @references_objects

      mail.references = @references_objects.collect {|o| self.class.message_id_for(o)}

    end

    # Log errors when raise_delivery_errors is set to false, Rails does not

    raise_errors = self.class.raise_delivery_errors

    self.class.raise_delivery_errors = true

    begin

      return super(mail)

    rescue Exception => e

      if raise_errors

        raise e

      elsif mylogger

        mylogger.error "The following error occured while sending email notification: \"#{e.message}\". Check your configuration in config/email.yml."

      end

    ensure

      self.class.raise_delivery_errors = raise_errors

    end

  end

  # Sends reminders to issue assignees

  # Available options:

  # * :days     => how many days in the future to remind about (defaults to 7)

  # * :tracker  => id of tracker for filtering issues (defaults to all trackers)

  # * :project  => id or identifier of project to process (defaults to all projects)

  # * :users    => array of user ids who should be reminded

  def self.reminders(options={})

    days = options[:days] || 7

    project = options[:project] ? Project.find(options[:project]) : nil

    tracker = options[:tracker] ? Tracker.find(options[:tracker]) : nil

    user_ids = options[:users]

    s = ARCondition.new ["#{IssueStatus.table_name}.is_closed = ? AND #{Issue.table_name}.due_date <= ?", false, days.day.from_now.to_date]

    s << "#{Issue.table_name}.assigned_to_id IS NOT NULL"

    s << ["#{Issue.table_name}.assigned_to_id IN (?)", user_ids] if user_ids.present?

    s << "#{Project.table_name}.status = #{Project::STATUS_ACTIVE}"

    s << "#{Issue.table_name}.project_id = #{project.id}" if project

    s << "#{Issue.table_name}.tracker_id = #{tracker.id}" if tracker

    issues_by_assignee = Issue.find(:all, :include => [:status, :assigned_to, :project, :tracker],

                                          :conditions => s.conditions

                                    ).group_by(&:assigned_to)

    issues_by_assignee.each do |assignee, issues|

      deliver_reminder(assignee, issues, days) unless assignee.nil?

    end

  end

  # Activates/desactivates email deliveries during +block+

  def self.with_deliveries(enabled = true, &block)

    was_enabled = ActionMailer::Base.perform_deliveries

    ActionMailer::Base.perform_deliveries = !!enabled

    yield

  ensure

    ActionMailer::Base.perform_deliveries = was_enabled

  end

  private

  def initialize_defaults(method_name)

    super

    @initial_language = current_language

    set_language_if_valid Setting.default_language

    from Setting.mail_from

    # Common headers

    headers 'X-Mailer' => 'Redmine',

            'X-Redmine-Host' => Setting.host_name,

            'X-Redmine-Site' => Setting.app_title,

            'Precedence' => 'bulk',

            'Auto-Submitted' => 'auto-generated'

  end

  # Appends a Redmine header field (name is prepended with 'X-Redmine-')

  def redmine_headers(h)

    h.each { |k,v| headers["X-Redmine-#{k}"] = v }

  end

  # Overrides the create_mail method

  def create_mail

    # Removes the current user from the recipients and cc

    # if he doesn't want to receive notifications about what he does

    @author ||= User.current

    if @author.pref[:no_self_notified]

      recipients.delete(@author.mail) if recipients

      cc.delete(@author.mail) if cc

    end

    notified_users = [recipients, cc].flatten.compact.uniq

    # Rails would log recipients only, not cc and bcc

    mylogger.info "Sending email notification to: #{notified_users.join(', ')}" if mylogger

    # Blind carbon copy recipients

    if Setting.bcc_recipients?

      bcc(notified_users)

      recipients []

      cc []

    end

    super

  end

  # Rails 2.3 has problems rendering implicit multipart messages with

  # layouts so this method will wrap an multipart messages with

  # explicit parts.

  #

  # https://rails.lighthouseapp.com/projects/8994/tickets/2338-actionmailer-mailer-views-and-content-type

  # https://rails.lighthouseapp.com/projects/8994/tickets/1799-actionmailer-doesnt-set-template_format-when-rendering-layouts

  def render_multipart(method_name, body)

    if Setting.plain_text_mail?

      content_type "text/plain"

      body render(:file => "#{method_name}.text.plain.rhtml", :body => body, :layout => 'mailer.text.plain.erb')

    else

      content_type "multipart/alternative"

      part :content_type => "text/plain", :body => render(:file => "#{method_name}.text.plain.rhtml", :body => body, :layout => 'mailer.text.plain.erb')

      part :content_type => "text/html", :body => render_message("#{method_name}.text.html.rhtml", body)

    end

  end

  # Makes partial rendering work with Rails 1.2 (retro-compatibility)

  def self.controller_path

    ''

  end unless respond_to?('controller_path')

  # Returns a predictable Message-Id for the given object

  def self.message_id_for(object)

    # id + timestamp should reduce the odds of a collision

    # as far as we don't send multiple emails for the same object

    timestamp = object.send(object.respond_to?(:created_on) ? :created_on : :updated_on) 

    hash = "redmine.#{object.class.name.demodulize.underscore}-#{object.id}.#{timestamp.strftime("%Y%m%d%H%M%S")}"

    host = Setting.mail_from.to_s.gsub(%r{^.*@}, '')

    host = "#{::Socket.gethostname}.redmine" if host.empty?

    "<#{hash}@#{host}>"

  end

  private

  def message_id(object)

    @message_id_object = object

  end

  def references(object)

    @references_objects ||= []

    @references_objects << object

  end

  def mylogger

    RAILS_DEFAULT_LOGGER

  end

end

# Patch TMail so that message_id is not overwritten

module TMail

  class Mail

    def add_message_id( fqdn = nil )

      self.message_id ||= ::TMail::new_message_id(fqdn)

    end

  end

end