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# Redmine - project management software

# Copyright (C) 2006-2014  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 IssueCustomField < CustomField

  has_and_belongs_to_many :projects, :join_table => "#{table_name_prefix}custom_fields_projects#{table_name_suffix}", :foreign_key => "custom_field_id"

  has_and_belongs_to_many :trackers, :join_table => "#{table_name_prefix}custom_fields_trackers#{table_name_suffix}", :foreign_key => "custom_field_id"

  has_many :issues, :through => :issue_custom_values

  def type_name

    :label_issue_plural

  end

  def visible_by?(project, user=User.current)

    super || (roles & user.roles_for_project(project)).present?

  end

  def visibility_by_project_condition(project_key=nil, user=User.current, id_column=nil)

    sql = super

    id_column ||= id

    tracker_condition = "#{Issue.table_name}.tracker_id IN (SELECT tracker_id FROM #{table_name_prefix}custom_fields_trackers#{table_name_suffix} WHERE custom_field_id = #{id_column})"

    project_condition = "EXISTS (SELECT 1 FROM #{CustomField.table_name} ifa WHERE ifa.is_for_all = #{connection.quoted_true} AND ifa.id = #{id_column})" + 

      " OR #{Issue.table_name}.project_id IN (SELECT project_id FROM #{table_name_prefix}custom_fields_projects#{table_name_suffix} WHERE custom_field_id = #{id_column})"

    "((#{sql}) AND (#{tracker_condition}) AND (#{project_condition}))"

  end

  def validate_custom_field

    super

    errors.add(:base, l(:label_role_plural) + ' ' + l('activerecord.errors.messages.blank')) unless visible? || roles.present?

  end

end