SoundSoftware Code Site

# Redmine - project management software

# Copyright (C) 2006-2010  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 Version < ActiveRecord::Base

  after_update :update_issues_from_sharing_change

  belongs_to :project

  has_many :fixed_issues, :class_name => 'Issue', :foreign_key => 'fixed_version_id', :dependent => :nullify

  acts_as_customizable

  acts_as_attachable :view_permission => :view_files,

                     :delete_permission => :manage_files

  VERSION_STATUSES = %w(open locked closed)

  VERSION_SHARINGS = %w(none descendants hierarchy tree system)

  validates_presence_of :name

  validates_uniqueness_of :name, :scope => [:project_id]

  validates_length_of :name, :maximum => 60

  validates_format_of :effective_date, :with => /^\d{4}-\d{2}-\d{2}$/, :message => :not_a_date, :allow_nil => true

  validates_inclusion_of :status, :in => VERSION_STATUSES

  validates_inclusion_of :sharing, :in => VERSION_SHARINGS

  named_scope :open, :conditions => {:status => 'open'}

  named_scope :visible, lambda {|*args| { :include => :project,

                                          :conditions => Project.allowed_to_condition(args.first || User.current, :view_issues) } }

  # Returns true if +user+ or current user is allowed to view the version

  def visible?(user=User.current)

    user.allowed_to?(:view_issues, self.project)

  end

  def start_date

    @start_date ||= fixed_issues.minimum('start_date')

  end

  def due_date

    effective_date

  end

  # Returns the total estimated time for this version

  # (sum of leaves estimated_hours)

  def estimated_hours

    @estimated_hours ||= fixed_issues.leaves.sum(:estimated_hours).to_f

  end

  # Returns the total reported time for this version

  def spent_hours

    @spent_hours ||= TimeEntry.sum(:hours, :include => :issue, :conditions => ["#{Issue.table_name}.fixed_version_id = ?", id]).to_f

  end

  def closed?

    status == 'closed'

  end

  def open?

    status == 'open'

  end

  # Returns true if the version is completed: due date reached and no open issues

  def completed?

    effective_date && (effective_date <= Date.today) && (open_issues_count == 0)

  end

  def behind_schedule?

    if completed_pourcent == 100

      return false

    elsif due_date && start_date

      done_date = start_date + ((due_date - start_date+1)* completed_pourcent/100).floor

      return done_date <= Date.today

    else

      false # No issues so it's not late

    end

  end

  # Returns the completion percentage of this version based on the amount of open/closed issues

  # and the time spent on the open issues.

  def completed_pourcent

    if issues_count == 0

      0

    elsif open_issues_count == 0

      100

    else

      issues_progress(false) + issues_progress(true)

    end

  end

  # Returns the percentage of issues that have been marked as 'closed'.

  def closed_pourcent

    if issues_count == 0

      0

    else

      issues_progress(false)

    end

  end

  # Returns true if the version is overdue: due date reached and some open issues

  def overdue?

    effective_date && (effective_date < Date.today) && (open_issues_count > 0)

  end

  # Returns assigned issues count

  def issues_count

    @issue_count ||= fixed_issues.count

  end

  # Returns the total amount of open issues for this version.

  def open_issues_count

    @open_issues_count ||= Issue.count(:all, :conditions => ["fixed_version_id = ? AND is_closed = ?", self.id, false], :include => :status)

  end

  # Returns the total amount of closed issues for this version.

  def closed_issues_count

    @closed_issues_count ||= Issue.count(:all, :conditions => ["fixed_version_id = ? AND is_closed = ?", self.id, true], :include => :status)

  end

  def wiki_page

    if project.wiki && !wiki_page_title.blank?

      @wiki_page ||= project.wiki.find_page(wiki_page_title)

    end

    @wiki_page

  end

  def to_s; name end

  def to_s_with_project

    "#{project} - #{name}"

  end

  # Versions are sorted by effective_date and "Project Name - Version name"

  # Those with no effective_date are at the end, sorted by "Project Name - Version name"

  def <=>(version)

    if self.effective_date

      if version.effective_date

        if self.effective_date == version.effective_date

          "#{self.project.name} - #{self.name}" <=> "#{version.project.name} - #{version.name}"

        else

          self.effective_date <=> version.effective_date

        end

      else

        -1

      end

    else

      if version.effective_date

        1

      else

        "#{self.project.name} - #{self.name}" <=> "#{version.project.name} - #{version.name}"

      end

    end

  end

  # Returns the sharings that +user+ can set the version to

  def allowed_sharings(user = User.current)

    VERSION_SHARINGS.select do |s|

      if sharing == s

        true

      else

        case s

        when 'system'

          # Only admin users can set a systemwide sharing

          user.admin?

        when 'hierarchy', 'tree'

          # Only users allowed to manage versions of the root project can

          # set sharing to hierarchy or tree

          project.nil? || user.allowed_to?(:manage_versions, project.root)

        else

          true

        end

      end

    end

  end

  private

  # Update the issue's fixed versions. Used if a version's sharing changes.

  def update_issues_from_sharing_change

    if sharing_changed?

      if VERSION_SHARINGS.index(sharing_was).nil? ||

          VERSION_SHARINGS.index(sharing).nil? ||

          VERSION_SHARINGS.index(sharing_was) > VERSION_SHARINGS.index(sharing)

        Issue.update_versions_from_sharing_change self

      end

    end

  end

  # Returns the average estimated time of assigned issues

  # or 1 if no issue has an estimated time

  # Used to weigth unestimated issues in progress calculation

  def estimated_average

    if @estimated_average.nil?

      average = fixed_issues.average(:estimated_hours).to_f

      if average == 0

        average = 1

      end

      @estimated_average = average

    end

    @estimated_average

  end

  # Returns the total progress of open or closed issues.  The returned percentage takes into account

  # the amount of estimated time set for this version.

  #

  # Examples:

  # issues_progress(true)   => returns the progress percentage for open issues.

  # issues_progress(false)  => returns the progress percentage for closed issues.

  def issues_progress(open)

    @issues_progress ||= {}

    @issues_progress[open] ||= begin

      progress = 0

      if issues_count > 0

        ratio = open ? 'done_ratio' : 100

        done = fixed_issues.sum("COALESCE(estimated_hours, #{estimated_average}) * #{ratio}",

                                  :include => :status,

                                  :conditions => ["is_closed = ?", !open]).to_f

        progress = done / (estimated_average * issues_count)

      end

      progress

    end

  end

end