openproject/app/models/sprint.rb

require 'date'

class Sprint < Version
  unloadable

  validate :start_and_end_dates

  scope :open_sprints, lambda { |project|
    {
      :order => "COALESCE(start_date, CAST('4000-12-30' as date)) ASC, COALESCE(effective_date, CAST('4000-12-30' as date)) ASC",
      :conditions => [ "versions.status = 'open' and versions.project_id = ?", project.id ]
    }
  }

  #null last ordering
  scope :order_by_date, :order => "COALESCE(start_date, CAST('4000-12-30' as date)) ASC, COALESCE(effective_date, CAST('4000-12-30' as date)) ASC"
  scope :order_by_name, :order => "#{Version.table_name}.name ASC"

  scope :apply_to, lambda { |project| {:include => :project,
                                             :conditions => ["#{Version.table_name}.project_id = #{project.id}" +
                                               " OR (#{Project.table_name}.status = #{Project::STATUS_ACTIVE} AND (" +
                                               " #{Version.table_name}.sharing = 'system'" +
                                               " OR (#{Project.table_name}.lft >= #{project.root.lft} AND #{Project.table_name}.rgt <= #{project.root.rgt} AND #{Version.table_name}.sharing = 'tree')" +
                                               " OR (#{Project.table_name}.lft < #{project.lft} AND #{Project.table_name}.rgt > #{project.rgt} AND #{Version.table_name}.sharing IN ('hierarchy', 'descendants'))" +
                                               " OR (#{Project.table_name}.lft > #{project.lft} AND #{Project.table_name}.rgt < #{project.rgt} AND #{Version.table_name}.sharing = 'hierarchy')" +
                                               "))"]}}

  scope :displayed_left, lambda { |project| { :joins => sanitize_sql_array(["LEFT OUTER JOIN (SELECT * from #{VersionSetting.table_name}" +
                                                                                  " WHERE project_id = ? ) version_settings" +
                                                                                  " ON version_settings.version_id = versions.id",
                                                                                  project.id]),
                                                    :conditions => ["(version_settings.project_id = ? AND version_settings.display = ?)" +
                                                                    " OR (version_settings.project_id is NULL)",
                                                                    project.id, VersionSetting::DISPLAY_LEFT] } }

  scope :displayed_right, lambda { |project| {:include => :version_settings,
                                                    :conditions => ["version_settings.project_id = ? AND version_settings.display = ?",
                                                                    project.id, VersionSetting::DISPLAY_RIGHT]} }

  def stories(project, options = {} )
    Story.sprint_backlog(project, self, options)
  end

  def points
    stories.inject(0) { |sum, story| sum + story.story_points.to_i }
  end

  def has_wiki_page
    return false if wiki_page_title.blank?

    page = project.wiki.find_page(self.wiki_page_title)
    return false if !page

    template = project.wiki.find_page(Setting.plugin_openproject_backlogs["wiki_template"])
    return false if template && page.text == template.text

    true
  end

  def wiki_page
    return '' unless project.wiki

    self.update_attribute(:wiki_page_title, Wiki.titleize(self.name)) if wiki_page_title.blank?

    page = project.wiki.find_page(self.wiki_page_title)
    template = project.wiki.find_page(Setting.plugin_openproject_backlogs["wiki_template"])

    if template and not page
      page = project.wiki.pages.build(:title => self.wiki_page_title)
      page.build_content(:text => "h1. #{self.name}\n\n#{template.text}")
      page.save!
    end

    wiki_page_title
  end

  def days(cutoff = nil, alldays = false)
    # assumes mon-fri are working days, sat-sun are not. this
    # assumption is not globally right, we need to make this configurable.
    cutoff = self.effective_date if cutoff.nil?

    (self.start_date .. cutoff).select {|d| alldays || (d.wday > 0 and d.wday < 6) }
  end

  def has_burndown?
    !!(self.effective_date and self.start_date)
  end

  def activity
    bd = self.burndown('up')
    return false if bd.blank?

    # assume a sprint is active if it's only 2 days old
    return true if bd.remaining_hours.size <= 2

    Issue.exists?(['fixed_version_id = ? and ((updated_on between ? and ?) or (created_on between ? and ?))',
                   self.id, -2.days.from_now, Time.now, -2.days.from_now, Time.now])
  end

  def burndown(project, burn_direction = nil)
    return nil unless self.has_burndown?

    @cached_burndown ||= Burndown.new(self, project, burn_direction)
  end

  def self.generate_burndown(only_current = true)
    if only_current
      conditions = ["? BETWEEN start_date AND effective_date", Date.today]
    else
      conditions = "1 = 1"
    end

    Version.find(:all, :conditions => conditions).each { |sprint|
      sprint.burndown
    }
  end

  def impediments(project)
    Impediment.find(:all, :conditions => {:fixed_version_id => self, :project_id => project})
  end

  private
  def start_and_end_dates
    if self.effective_date && self.start_date && self.start_date >= self.effective_date
      errors.add(:base, :cannot_end_before_it_starts)
    end
  end
end