fix generic

content/index.erb

@@ -6,7 +6,7 @@
 
 <div id="homepage">
   <div class="tile is-vertical is-ancestor">
-    <%= render '/tiles/blokmap.*' %>
+    <%= if studytime? then render '/tiles/blokmap.*'end %>
     <div class="tile is-parent is-12">
       <div class="tile is-child box highlighted">
         <div class="content">

lib/helpers/time.rb

@@ -1,5 +1,23 @@
 module TimeHelper
   def christmastime?
-    Time.now.month == 12
+    timehelper([[Time.new(Time.now.year,12,6),Time.new(Time.now.year,12,31)]])
+  end
+
+  def studytime?
+    year = Time.now.year
+    timehelper([
+      [Time.new(year,12,14), Time.new(year,12,31)],
+      [Time.new(year,1,1), Time.new(year,2,7)],
+      [Time.new(year,5,15), Time.new(year,6,30)],
+      [Time.new(year,8,5), Time.new(year,9,10)],
+    ])
+  end
+
+  def timehelper(ranges)
+    ranges.any? {|range| periodhelper(*range)}
+  end
+
+  def periodhelper(startdate, enddate)
+    Time.now.between?(startdate, enddate)
   end
 end