Persist Merge Request diff. Auto merge request close on push

app/models/merge_request.rb

@@ -1,9 +1,14 @@
+require File.join(Rails.root, "app/models/commit")
+
 class MergeRequest < ActiveRecord::Base
   belongs_to :project
   belongs_to :author, :class_name => "User"
   belongs_to :assignee, :class_name => "User"
   has_many :notes, :as => :noteable, :dependent => :destroy
 
+  serialize :st_commits
+  serialize :st_diffs
+
   attr_protected :author, :author_id, :project, :project_id
   attr_accessor :author_id_of_changes
 
@@ -32,7 +37,6 @@ class MergeRequest < ActiveRecord::Base
   scope :closed, where(:closed => true)
   scope :assigned, lambda { |u| where(:assignee_id => u.id)}
 
-
   def validate_branches
     if target_branch == source_branch
       errors.add :base, "You can not use same branch for source and target branches"
@@ -44,18 +48,65 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def diffs
+    st_diffs || []
+  end
+
+  def reloaded_diffs
+    if open? && unmerged_diffs.any?
+      self.st_diffs = unmerged_diffs
+      save
+    end
+    diffs
+  end
+
+  def unmerged_diffs
     commits = project.repo.commits_between(target_branch, source_branch).map {|c| Commit.new(c)}
     diffs = project.repo.diff(commits.first.prev_commit.id, commits.last.id) rescue []
   end
 
   def last_commit
-    project.commit(source_branch)
+    commits.first
   end
 
   # Return the number of +1 comments (upvotes)
   def upvotes
     notes.select(&:upvote?).size
   end
+
+  def commits
+    st_commits || []
+  end
+
+  def probably_merged?
+    unmerged_commits.empty? && 
+      commits.any? && open?
+  end
+
+  def open?
+    !closed
+  end
+
+  def mark_as_merged!
+    self.merged = true
+    self.closed = true
+    save
+  end
+
+  def reloaded_commits 
+    if open? && unmerged_commits.any? 
+      self.st_commits = unmerged_commits
+      save
+    end
+    commits
+  end
+
+  def unmerged_commits
+    self.project.repo.
+      commits_between(self.target_branch, self.source_branch).
+      map {|c| Commit.new(c)}.
+      sort_by(&:created_at).
+      reverse
+  end
 end
 # == Schema Information
 #