SoundSoftware Code Site

# Redmine - project management software

# Copyright (C) 2006-2012  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 Tracker < ActiveRecord::Base

  CORE_FIELDS_UNDISABLABLE = %w(project_id tracker_id subject description priority_id is_private).freeze

  # Fields that can be disabled

  # Other (future) fields should be appended, not inserted!

  CORE_FIELDS = %w(assigned_to_id category_id fixed_version_id parent_issue_id start_date due_date estimated_hours done_ratio).freeze

  CORE_FIELDS_ALL = (CORE_FIELDS_UNDISABLABLE + CORE_FIELDS).freeze

  before_destroy :check_integrity

  has_many :issues

  has_many :workflow_rules, :dependent => :delete_all do

    def copy(source_tracker)

      WorkflowRule.copy(source_tracker, nil, proxy_association.owner, nil)

    end

  end

  has_and_belongs_to_many :projects

  has_and_belongs_to_many :custom_fields, :class_name => 'IssueCustomField', :join_table => "#{table_name_prefix}custom_fields_trackers#{table_name_suffix}", :association_foreign_key => 'custom_field_id'

  acts_as_list

  attr_protected :field_bits

  validates_presence_of :name

  validates_uniqueness_of :name

  validates_length_of :name, :maximum => 30

  scope :sorted, order("#{table_name}.position ASC")

  scope :named, lambda {|arg| where("LOWER(#{table_name}.name) = LOWER(?)", arg.to_s.strip)}

  def to_s; name end

  def <=>(tracker)

    position <=> tracker.position

  end

  # Returns an array of IssueStatus that are used

  # in the tracker's workflows

  def issue_statuses

    if @issue_statuses

      return @issue_statuses

    elsif new_record?

      return []

    end

    ids = WorkflowTransition.

            connection.select_rows("SELECT DISTINCT old_status_id, new_status_id FROM #{WorkflowTransition.table_name} WHERE tracker_id = #{id} AND type = 'WorkflowTransition'").

            flatten.

            uniq

    @issue_statuses = IssueStatus.find_all_by_id(ids).sort

  end

  def disabled_core_fields

    i = -1

    @disabled_core_fields ||= CORE_FIELDS.select { i += 1; (fields_bits || 0) & (2 ** i) != 0}

  end

  def core_fields

    CORE_FIELDS - disabled_core_fields

  end

  def core_fields=(fields)

    raise ArgumentError.new("Tracker.core_fields takes an array") unless fields.is_a?(Array)

    bits = 0

    CORE_FIELDS.each_with_index do |field, i|

      unless fields.include?(field)

        bits |= 2 ** i

      end

    end

    self.fields_bits = bits

    @disabled_core_fields = nil

    core_fields

  end

  # Returns the fields that are disabled for all the given trackers

  def self.disabled_core_fields(trackers)

    if trackers.present?

      trackers.uniq.map(&:disabled_core_fields).reduce(:&)

    else

      []

    end

  end

  # Returns the fields that are enabled for one tracker at least

  def self.core_fields(trackers)

    if trackers.present?

      trackers.uniq.map(&:core_fields).reduce(:|)

    else

      CORE_FIELDS.dup

    end

  end

private

  def check_integrity

    raise Exception.new("Can't delete tracker") if Issue.where(:tracker_id => self.id).any?

  end

end