Implement track request acceptance

Allow track submitter to request specific dates
Redirect to Tracks#edit if a track doesn't have a room or start/end date
before accepting it

Don't allow the submitter or the track organizers to edit the request
after it has been accepted or confirmed

Restrict track selection in proposals and move track selection from
Proposals form to events helper

Mark cfp_active of the tracks table as not null and fill in true if nil

spec/controllers/tracks_controller_spec.rb

@@ -1,12 +1,11 @@
 require 'spec_helper'
 
 describe TracksController do
-  # A regular user should be used when the track requests have been enabled
   let(:user) { create(:admin) }
 
   let(:conference) { create(:conference) }
   let!(:regular_track) { create(:track, program: conference.program) }
-  let!(:self_organized_track) { create(:track, :self_organized, program: conference.program, submitter: user, color: '#800080') }
+  let!(:self_organized_track) { create(:track, :self_organized, program: conference.program, submitter: user, name: 'My awesome track', color: '#800080') }
 
   before :each do
     sign_in(user)
@@ -176,4 +175,67 @@ describe TracksController do
       end
     end
   end
+
+  describe 'PATCH #restart' do
+    before :each do
+      self_organized_track.state = 'withdrawn'
+      self_organized_track.save!
+      patch :restart, conference_id: conference.short_title, id: self_organized_track.short_name
+      self_organized_track.reload
+    end
+
+    it 'assigns the correct track' do
+      expect(assigns(:track)).to eq self_organized_track
+    end
+
+    it 'shows message in flash notice' do
+      expect(flash[:notice]).to eq 'Track My awesome track re-submitted.'
+    end
+
+    it 'changes the track\'s state to new' do
+      expect(self_organized_track.state).to eq 'new'
+    end
+  end
+
+  describe 'PATCH #confirm' do
+    before :each do
+      self_organized_track.state = 'accepted'
+      self_organized_track.save!
+      patch :confirm, conference_id: conference.short_title, id: self_organized_track.short_name
+      self_organized_track.reload
+    end
+
+    it 'assigns the correct track' do
+      expect(assigns(:track)).to eq self_organized_track
+    end
+
+    it 'shows message in flash notice' do
+      expect(flash[:notice]).to eq 'Track My awesome track confirmed.'
+    end
+
+    it 'changes the track\'s state to confirmed' do
+      expect(self_organized_track.state).to eq 'confirmed'
+    end
+  end
+
+  describe 'PATCH #withdraw' do
+    before :each do
+      self_organized_track.state = 'confirmed'
+      self_organized_track.save!
+      patch :withdraw, conference_id: conference.short_title, id: self_organized_track.short_name
+      self_organized_track.reload
+    end
+
+    it 'assigns the correct track' do
+      expect(assigns(:track)).to eq self_organized_track
+    end
+
+    it 'shows message in flash notice' do
+      expect(flash[:notice]).to eq 'Track My awesome track withdrawn.'
+    end
+
+    it 'changes the track\'s state to withdrawn' do
+      expect(self_organized_track.state).to eq 'withdrawn'
+    end
+  end
 end