view app/models/issue_relation.rb @ 1082:997f6d7738f7 bug_531

In repo controller entry action, show the page for the file even if it's binary (so user still has access to history etc links). This makes it possible to use the entry action as the default when a file is clicked on

# Redmine - project management software
# Copyright (C) 2006-2011  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 IssueRelation < ActiveRecord::Base
  belongs_to :issue_from, :class_name => 'Issue', :foreign_key => 'issue_from_id'
  belongs_to :issue_to, :class_name => 'Issue', :foreign_key => 'issue_to_id'

  TYPE_RELATES      = "relates"
  TYPE_DUPLICATES   = "duplicates"
  TYPE_DUPLICATED   = "duplicated"
  TYPE_BLOCKS       = "blocks"
  TYPE_BLOCKED      = "blocked"
  TYPE_PRECEDES     = "precedes"
  TYPE_FOLLOWS      = "follows"

  TYPES = { TYPE_RELATES =>     { :name => :label_relates_to, :sym_name => :label_relates_to, :order => 1, :sym => TYPE_RELATES },
            TYPE_DUPLICATES =>  { :name => :label_duplicates, :sym_name => :label_duplicated_by, :order => 2, :sym => TYPE_DUPLICATED },
            TYPE_DUPLICATED =>  { :name => :label_duplicated_by, :sym_name => :label_duplicates, :order => 3, :sym => TYPE_DUPLICATES, :reverse => TYPE_DUPLICATES },
            TYPE_BLOCKS =>      { :name => :label_blocks, :sym_name => :label_blocked_by, :order => 4, :sym => TYPE_BLOCKED },
            TYPE_BLOCKED =>     { :name => :label_blocked_by, :sym_name => :label_blocks, :order => 5, :sym => TYPE_BLOCKS, :reverse => TYPE_BLOCKS },
            TYPE_PRECEDES =>    { :name => :label_precedes, :sym_name => :label_follows, :order => 6, :sym => TYPE_FOLLOWS },
            TYPE_FOLLOWS =>     { :name => :label_follows, :sym_name => :label_precedes, :order => 7, :sym => TYPE_PRECEDES, :reverse => TYPE_PRECEDES }
          }.freeze

  validates_presence_of :issue_from, :issue_to, :relation_type
  validates_inclusion_of :relation_type, :in => TYPES.keys
  validates_numericality_of :delay, :allow_nil => true
  validates_uniqueness_of :issue_to_id, :scope => :issue_from_id

  validate :validate_issue_relation

  attr_protected :issue_from_id, :issue_to_id

  before_save :handle_issue_order

  def visible?(user=User.current)
    (issue_from.nil? || issue_from.visible?(user)) && (issue_to.nil? || issue_to.visible?(user))
  end

  def deletable?(user=User.current)
    visible?(user) &&
      ((issue_from.nil? || user.allowed_to?(:manage_issue_relations, issue_from.project)) ||
        (issue_to.nil? || user.allowed_to?(:manage_issue_relations, issue_to.project)))
  end

  def after_initialize
    if new_record?
      if relation_type.blank?
        self.relation_type = IssueRelation::TYPE_RELATES
      end
    end
  end

  def validate_issue_relation
    if issue_from && issue_to
      errors.add :issue_to_id, :invalid if issue_from_id == issue_to_id
      errors.add :issue_to_id, :not_same_project unless issue_from.project_id == issue_to.project_id || Setting.cross_project_issue_relations?
      #detect circular dependencies depending wether the relation should be reversed
      if TYPES.has_key?(relation_type) && TYPES[relation_type][:reverse]
        errors.add :base, :circular_dependency if issue_from.all_dependent_issues.include? issue_to
      else
        errors.add :base, :circular_dependency if issue_to.all_dependent_issues.include? issue_from
      end
      errors.add :base, :cant_link_an_issue_with_a_descendant if issue_from.is_descendant_of?(issue_to) || issue_from.is_ancestor_of?(issue_to)
    end
  end

  def other_issue(issue)
    (self.issue_from_id == issue.id) ? issue_to : issue_from
  end

  # Returns the relation type for +issue+
  def relation_type_for(issue)
    if TYPES[relation_type]
      if self.issue_from_id == issue.id
        relation_type
      else
        TYPES[relation_type][:sym]
      end
    end
  end

  def label_for(issue)
    TYPES[relation_type] ? TYPES[relation_type][(self.issue_from_id == issue.id) ? :name : :sym_name] : :unknow
  end

  def handle_issue_order
    reverse_if_needed

    if TYPE_PRECEDES == relation_type
      self.delay ||= 0
    else
      self.delay = nil
    end
    set_issue_to_dates
  end

  def set_issue_to_dates
    soonest_start = self.successor_soonest_start
    if soonest_start && issue_to
      issue_to.reschedule_after(soonest_start)
    end
  end

  def successor_soonest_start
    if (TYPE_PRECEDES == self.relation_type) && delay && issue_from && (issue_from.start_date || issue_from.due_date)
      (issue_from.due_date || issue_from.start_date) + 1 + delay
    end
  end

  def <=>(relation)
    TYPES[self.relation_type][:order] <=> TYPES[relation.relation_type][:order]
  end

  private

  # Reverses the relation if needed so that it gets stored in the proper way
  # Should not be reversed before validation so that it can be displayed back
  # as entered on new relation form
  def reverse_if_needed
    if TYPES.has_key?(relation_type) && TYPES[relation_type][:reverse]
      issue_tmp = issue_to
      self.issue_to = issue_from
      self.issue_from = issue_tmp
      self.relation_type = TYPES[relation_type][:reverse]
    end
  end
end