Send monthly reports

app/helpers/ReadingsMailer.rb

@@ -26,10 +26,12 @@ class ReadingsMailer
     # Fetch today's usage
     usage_today = Reading.diff_on(date)
     consumption_today, production_today = Reading.consumed_and_produced_for_diff(usage_today)
+    net_consumption_high, net_consumption_low = Reading.net_consumed_high_and_low_for_diff(usage_today)
 
     # Calculate costs for oxxio and easy energy
     c = Cost.new
-    oxxio_cost = c.oxxio_energy_cost(date.to_s,usage_today[:total_kwh_consumed_high]-usage_today[:total_kwh_produced_high], usage_today[:total_kwh_consumed_low]-usage_today[:total_kwh_produced_low])
+    oxxio_normaal_cost, oxxio_dal_cost = c.oxxio_energy_cost(date.to_s,net_consumption_high,net_consumption_low)
+    oxxio_cost = oxxio_normaal_cost+oxxio_dal_cost
     easy_cost = c.easy_energy_cost_barplot(date) # side effect: generates a PNG
     # rounding
     oxxio_cost = oxxio_cost.round(2)
@@ -55,8 +57,8 @@ class ReadingsMailer
         html_part do
           content_type 'text/html; charset=UTF-8'
           body "<h1>Summary for #{date}</h1>" +
-               "<p>Total kWH electricity consumed: #{usage_today[:total_kwh_consumed_high] + usage_today[:total_kwh_consumed_low]}</p>" +
-               "<p>Total kWH electricity produced:  #{usage_today[:total_kwh_produced_high] + usage_today[:total_kwh_produced_low]}</p>" +
+               "<p>Total kWH electricity consumed: #{consumption_today}</p>" +
+               "<p>Total kWH electricity produced:  #{production_today}</p>" +
                "<p>Total m3 gas consumed: #{usage_today[:total_m3_gas_consumed]}</p>" +
                "</br>" +
                "<p>kWH cost (Oxxio): <b>EUR #{ oxxio_cost} </b></p>" +
@@ -70,5 +72,75 @@ class ReadingsMailer
       
       mail.deliver!
     end
+
+    # default is current year
+    def deliver_for_month(month, year=nil)
+      return if (month <1 || month >12)
+
+      year = Date.today.year unless year
+      date = Date.parse("%s%.2d01" % [year,month])
+      date_str = date.strftime("%B %Y")
+      
+      # Read SMTP options from smtp.yml
+      smtp_opts = YAML::load(File.open('config/smtp.yml')).symbolize_keys
+      smtp_opts.merge!(SSL_OPTS) if smtp_opts[:ssl] && smtp_opts[:ssl_verify_mode].eql?("none")
+    
+      # Fetch today's usage
+      usage_month = Reading.diff_in_month(date)
+      consumption_month, production_month = Reading.consumed_and_produced_for_diff(usage_month)
+      net_consumption_normaal, net_consumption_dal = Reading.net_consumed_high_and_low_for_diff(usage_month)
+
+
+      # Calculate costs for oxxio and easy energy
+      c = Cost.new
+      vat = 1 + c.vat_at(date)
+
+      # cost with VAT, but without energiebelasting.
+      oxxio_raw_cost = c.oxxio_energy_cost(date.to_s,net_consumption_normaal, net_consumption_dal, false).sum.round(2)
+      easy_energy_raw_cost = c.easy_energy_raw_cost_in_month(date).compact.sum.round(2)
+
+      # cost with VAT and with energiebelasting
+      oxxio_cost = c.oxxio_energy_cost(date.to_s,net_consumption_normaal, net_consumption_dal).sum.round(2)
+      easy_energy_cost = c.easy_energy_cost_in_month(date).compact.sum.round(2)
+
+      # opslag Easy Energy
+      easy_energy_opslag = (c.easy_energy_rate(date.to_s)*vat*(net_consumption_normaal + net_consumption_dal)).round(2)
+
+      mail = Mail.new do
+        delivery_method :smtp, smtp_opts
+        to      'a.t.van.halteren@vu.nl'
+        from    'SmartMeter <aart@van-halteren.net>'
+        subject "SmartMeter Month report for #{date_str}"
+
+        text_part do
+          body "Summary for #{date_str}\n
+                -------------------------------\n\n
+                Total kWH electricity consumed: #{consumption_month}\n
+                Total kWH electricity produced:  #{production_month}\n
+                Total m3 gas consumed: #{usage_month[:total_m3_gas_consumed]}\n\n
+                Levering kWH cost (Oxxio) : EUR #{ oxxio_raw_cost }\n
+                Levering kWH cost (EasyEnergy): EUR #{ easy_energy_raw_cost }\n
+                Total kWH cost (Oxxio) : EUR #{ oxxio_cost }\n
+                Total kWH cost (EasyEnergy): EUR #{ easy_energy_cost }, inclusief opslag van EUR #{ easy_energy_opslag }\n
+               "
+        end
+      
+        html_part do
+          content_type 'text/html; charset=UTF-8'
+          body "<h1>Summary for #{date_str}</h1>" +
+               "<p>Total kWH electricity consumed: #{consumption_month}</p>" +
+               "<p>Total kWH electricity produced:  #{production_month}</p>" +
+               "<p>Total m3 gas consumed: #{usage_month[:total_m3_gas_consumed]}</p>" +
+               "</br>" +
+               "<p>Levering kWH cost (Oxxio): <b>EUR #{ oxxio_raw_cost} </b></p>" +
+               "<p>Levering kWH cost (EasyEnergy): <b>EUR #{ easy_energy_raw_cost} </b></p>" +
+               "<p>Total kWH cost (Oxxio): <b>EUR #{ oxxio_cost} </b></p>" +
+               "<p>Total kWH cost (EasyEnergy): <b>EUR #{ easy_energy_cost} </b>, inclusief opslag van <b>EUR #{ easy_energy_opslag }</b></p>"
+        end 
+        
+      end
+      
+      mail.deliver!
+    end
   end   
 end