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# redMine - project management software

# Copyright (C) 2006  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.

class Journal < ActiveRecord::Base

  belongs_to :journalized, :polymorphic => true

  # added as a quick fix to allow eager loading of the polymorphic association

  # since always associated to an issue, for now

  belongs_to :issue, :foreign_key => :journalized_id

  belongs_to :user

  has_many :details, :class_name => "JournalDetail", :dependent => :delete_all

  attr_accessor :indice

  acts_as_event :title => Proc.new {|o| status = ((s = o.new_status) ? " (#{s})" : nil); "#{o.issue.tracker} ##{o.issue.id}#{status}: #{o.issue.subject}" },

                :description => :notes,

                :author => :user,

                :type => Proc.new {|o| (s = o.new_status) ? (s.is_closed? ? 'issue-closed' : 'issue-edit') : 'issue-note' },

                :url => Proc.new {|o| {:controller => 'issues', :action => 'show', :id => o.issue.id, :anchor => "change-#{o.id}"}}

  acts_as_activity_provider :type => 'issues',

                            :permission => :view_issues,

                            :author_key => :user_id,

                            :find_options => {:include => [{:issue => :project}, :details, :user],

                                              :conditions => "#{Journal.table_name}.journalized_type = 'Issue' AND" +

                                                             " (#{JournalDetail.table_name}.prop_key = 'status_id' OR #{Journal.table_name}.notes <> '')"}

  def save(*args)

    # Do not save an empty journal

    (details.empty? && notes.blank?) ? false : super

  end

  # Returns the new status if the journal contains a status change, otherwise nil

  def new_status

    c = details.detect {|detail| detail.prop_key == 'status_id'}

    (c && c.value) ? IssueStatus.find_by_id(c.value.to_i) : nil

  end

  def new_value_for(prop)

    c = details.detect {|detail| detail.prop_key == prop}

    c ? c.value : nil

  end

  def editable_by?(usr)

    usr && usr.logged? && (usr.allowed_to?(:edit_issue_notes, project) || (self.user == usr && usr.allowed_to?(:edit_own_issue_notes, project)))

  end

  def project

    journalized.respond_to?(:project) ? journalized.project : nil

  end

  def attachments

    journalized.respond_to?(:attachments) ? journalized.attachments : nil

  end

  # Returns a string of css classes

  def css_classes

    s = 'journal'

    s << ' has-notes' unless notes.blank?

    s << ' has-details' unless details.blank?

    s

  end

end