1 files changed, 34 insertions, 0 deletions
diff --git a/lib/reports/sales_by_date.rb b/lib/reports/sales_by_date.rb
new file mode 100644
index 0000000..9e623f1
--- /dev/null
+++ b/lib/reports/sales_by_date.rb
@@ -0,0 +1,34 @@
+module SalesReporter
+  module Reports
+    class SalesByDate
+      def self.render(sales)
+        sales_by_date = {}
+
+        sales.each do |s|
+          d = s.date
+          if sales_by_date[d]
+            sales_by_date[d][:count] += s.quantity
+            sales_by_date[d][:total] += s.amount
+          else
+            sales_by_date[d] = {:count => s.quantity, :total => s.amount}
+          end
+        end
+
+        puts "Date:       Streams:  Revenue:"
+        puts "------------------------------------------"
+
+        total_rev = 0
+        total_streams = 0
+
+        sales_by_date.each do |key, row|
+          puts "#{key.iso8601}: #{row[:count].to_s.rjust(7)} #{row[:total].round(5).to_s.rjust(10)} EUR"
+          total_rev += row[:total]
+          total_streams += row[:count]
+        end
+
+        puts "------------------------------------------"
+        puts "Total:      #{total_streams.to_s.rjust(7)} #{total_rev.round(5).to_s.rjust(10)} EUR"
+      end
+    end
+  end
+end