at_index breaks

classes/Scheduler.rb

@@ -19,13 +19,21 @@ class Scheduler
     date
   end
 
-  def ok_to_add(date, breaks)
+  def ok_to_add(date, index, prior, breaks)
     ok = true
     breaks.each do |i|
+      if i['from'] && i['to']
         if (i['from'] <= date) && (i['to'] >= date)
           ok = false
         end
       end
+
+      if i['at_index'] && i['for_days'] && prior
+        if i['at_index'] == index
+          ok = (date > (prior + i['for_days']))
+        end
+      end
+    end
     ok
   end
 
@@ -34,9 +42,11 @@ class Scheduler
 
     if parameters['start']
       current = parameters['start']
+      prior = nil
 
       breaks = parameters['breaks'] || []
 
+      index = 0
       while dates.length < to_produce
         interval = parameters['interval'].shift
 
@@ -44,14 +54,18 @@ class Scheduler
           when 'String'
             current = skip_to_dow(current, interval)
 
-            if ok_to_add(current, breaks)
+            if ok_to_add(current, index, prior, breaks)
               dates << current
+              prior = current
+              index += 1
             end
 
             current += 1
           when 'Fixnum'
-            if ok_to_add(current, breaks)
+            if ok_to_add(current, index, prior, breaks)
               dates << current
+              prior = current
+              index += 1
             end
 
             current += interval

tests/TestScheduler.rb

@@ -38,6 +38,20 @@ class TestScheduler < Test::Unit::TestCase
         4,
         [ DateTime.parse('2010-01-01'), DateTime.parse('2010-01-02'), DateTime.parse('2010-01-06'), DateTime.parse('2010-01-07') ]
       ],
+      [
+        {
+          'start' => DateTime.parse('2010-01-01'),
+          'interval' => [ 'monday', 'wednesday', 'friday' ],
+          'breaks' => [
+            { 'at_index' => 3, 'for_days' => 7 }
+          ]
+        },
+        6,
+        [
+          DateTime.parse('2010-01-04'), DateTime.parse('2010-01-06'), DateTime.parse('2010-01-08'),
+          DateTime.parse('2010-01-18'), DateTime.parse('2010-01-20'), DateTime.parse('2010-01-22')
+        ]
+      ],
     ].each do |parameters, to_produce, expected_results|
       assert_equal expected_results, @scheduler.schedule(parameters, to_produce)
     end