Initial release of Discourse

app/models/draft_sequence.rb

@@ -0,0 +1,29 @@
+class DraftSequence < ActiveRecord::Base
+  def self.next!(user,key)
+    user_id = user
+    user_id = user.id unless user.class == Fixnum
+    h = {user_id: user_id, draft_key: key} 
+    c = DraftSequence.where(h).first
+    c ||= DraftSequence.new(h)
+    c.sequence ||= 0
+    c.sequence += 1
+    c.save 
+    c.sequence
+  end
+
+  def self.current(user, key)
+    return nil unless user
+
+    user_id = user
+    user_id = user.id unless user.class == Fixnum
+
+    # perf critical path
+    r = exec_sql('select sequence from draft_sequences where user_id = ? and draft_key = ?', user_id, key).values
+
+    if r.length == 0
+      0
+    else 
+      r[0][0].to_i
+    end
+  end
+end