Rewrite the Gantt chart. #6276

This version of the Gantt chart supports nested charts. So Projects,
Versions, and Issues will be nested underneath their parents correctly.

Additional features:

* Move all Gantt code to Redmine::Helpers::Gantt class instead of having it in
  the Gantt class, controller, and view
* Recursive and nest sub-projects
* Recursive and nest versions
* Recursive and nest issues
* Draw a line showing when a Project is active and it's progress
* Draw a line showing when a Version is active and it's progress
* Show a version's % complete
* Change the color of Projects, Versions, and Issues if they are late or
  behind schedule
* Added Project#start_date and #due_date
* Added Project#completed_percent
* Use a mini-gravatar on the Gantt chart
* Added tests for the Gantt rendering

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4072 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/issue.rb

@@ -62,10 +62,28 @@ class Issue < ActiveRecord::Base
   
   named_scope :open, :conditions => ["#{IssueStatus.table_name}.is_closed = ?", false], :include => :status
 
-  named_scope :recently_updated, :order => "#{self.table_name}.updated_on DESC"
+  named_scope :recently_updated, :order => "#{Issue.table_name}.updated_on DESC"
   named_scope :with_limit, lambda { |limit| { :limit => limit} }
   named_scope :on_active_project, :include => [:status, :project, :tracker],
                                   :conditions => ["#{Project.table_name}.status=#{Project::STATUS_ACTIVE}"]
+  named_scope :for_gantt, lambda {
+    {
+      :include => [:tracker, :status, :assigned_to, :priority, :project, :fixed_version],
+      :order => "#{Issue.table_name}.due_date ASC, #{Issue.table_name}.start_date ASC, #{Issue.table_name}.id ASC"
+    }
+  }
+
+  named_scope :without_version, lambda {
+    {
+      :conditions => { :fixed_version_id => nil}
+    }
+  }
+
+  named_scope :with_query, lambda {|query|
+    {
+      :conditions => Query.merge_conditions(query.statement)
+    }
+  }
 
   before_create :default_assign
   before_save :reschedule_following_issues, :close_duplicates, :update_done_ratio_from_issue_status
@@ -357,6 +375,13 @@ class Issue < ActiveRecord::Base
   def overdue?
     !due_date.nil? && (due_date < Date.today) && !status.is_closed?
   end
+
+  # Is the amount of work done less than it should for the due date
+  def behind_schedule?
+    return false if start_date.nil? || due_date.nil?
+    done_date = start_date + ((due_date - start_date+1)* done_ratio/100).floor
+    return done_date <= Date.today
+  end
   
   # Users the issue can be assigned to
   def assignable_users

app/models/project.rb

@@ -412,6 +412,50 @@ class Project < ActiveRecord::Base
   def short_description(length = 255)
     description.gsub(/^(.{#{length}}[^\n\r]*).*$/m, '\1...').strip if description
   end
+
+  # The earliest start date of a project, based on it's issues and versions
+  def start_date
+    if module_enabled?(:issue_tracking)
+      [
+       issues.minimum('start_date'),
+       shared_versions.collect(&:effective_date),
+       shared_versions.collect {|v| v.fixed_issues.minimum('start_date')}
+      ].flatten.compact.min
+    end
+  end
+
+  # The latest due date of an issue or version
+  def due_date
+    if module_enabled?(:issue_tracking)
+      [
+       issues.maximum('due_date'),
+       shared_versions.collect(&:effective_date),
+       shared_versions.collect {|v| v.fixed_issues.maximum('due_date')}
+      ].flatten.compact.max
+    end
+  end
+
+  def overdue?
+    active? && !due_date.nil? && (due_date < Date.today)
+  end
+
+  # Returns the percent completed for this project, based on the
+  # progress on it's versions.
+  def completed_percent(options={:include_subprojects => false})
+    if options.delete(:include_subprojects)
+      total = self_and_descendants.collect(&:completed_percent).sum
+
+      total / self_and_descendants.count
+    else
+      if versions.count > 0
+        total = versions.collect(&:completed_pourcent).sum
+
+        total / versions.count
+      else
+        100
+      end
+    end
+  end
   
   # Return true if this project is allowed to do the specified action.
   # action can be:

app/models/version.rb

@@ -73,6 +73,18 @@ class Version < ActiveRecord::Base
   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 && fixed_issues.present? && fixed_issues.minimum('start_date') # TODO: should use #start_date but that method is wrong...
+      start_date = fixed_issues.minimum('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.