Add contest duration & complete ranking mode implementation

app/models/completion.rb

@@ -32,6 +32,8 @@
 #  puzzle_id      (puzzle_id => puzzles.id)
 #
 class Completion < ApplicationRecord
+  include ContestsHelper
+
   belongs_to :contest
   belongs_to :contestant
   belongs_to :puzzle
@@ -42,7 +44,7 @@ class Completion < ApplicationRecord
   before_save :clean_pieces
   before_save :compute_projected_time
 
-  validates :display_time_from_start, presence: true, format: { with: /\A(((\d\d|\d):\d\d|\d\d|\d):\d\d|\d\d|\d)\z/ }
+  validates :display_time_from_start, presence: true, format: { with: /\A(((\d\d|\d):\d\d|\d\d|\d):\d\d|\d\d|\d)\z/ }, if: -> { completed || offline.present? }
   validates :remaining_pieces, presence: true, if: -> { !completed }
   validates :contestant_id, uniqueness: { scope: :puzzle }, if: -> { contest.puzzles.size == 1 }
   validates :puzzle_id, uniqueness: { scope: :contestant }, if: -> { contest.puzzles.size > 1 }
@@ -66,7 +68,8 @@ class Completion < ApplicationRecord
         self.time_seconds = arr[0].to_i
       end
     else
-      self.time_seconds = 1
+      self.time_seconds = self.contest.duration_seconds
+      self.display_time_from_start = display_time(self.time_seconds)
     end
   end
 
@@ -75,6 +78,9 @@ class Completion < ApplicationRecord
       self.remaining_pieces = nil
     else
       self.missing_pieces = nil
+      if !self.offline.present?
+        self.display_time_from_start = nil
+      end
     end
   end
 
@@ -82,7 +88,7 @@ class Completion < ApplicationRecord
     add_time_seconds
     if self.completed
       self.projected_time = self.time_seconds
-    elsif self.offline.present?
+    else
       assembled_time = self.time_seconds
       assembled_pieces = self.puzzle.pieces - self.remaining_pieces
       pieces_per_second = assembled_pieces.to_f / assembled_time.to_f