From c7aa6e5d926d6425aa93d5bd6b2dd0ccb224a77f Mon Sep 17 00:00:00 2001
From: Aart van Halteren <aart.van.halteren@philips.com>
Date: Sun, 23 Oct 2022 12:23:08 +0200
Subject: [PATCH] Email tariffs daily

---
 app/helpers/TariffsMailer.rb | 46 ++++++++++++++++++++++++++++++++++++
 app/models/cost.rb           |  2 +-
 2 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 app/helpers/TariffsMailer.rb

diff --git a/app/helpers/TariffsMailer.rb b/app/helpers/TariffsMailer.rb
new file mode 100644
index 0000000..3d1fc8a
--- /dev/null
+++ b/app/helpers/TariffsMailer.rb
@@ -0,0 +1,46 @@
+require "mail"
+
+class TariffsMailer
+    
+  SSL_OPTS = {
+                :openssl_verify_mode => OpenSSL::SSL::VERIFY_NONE,
+  }  
+  
+                   
+  #
+  # Class methods
+  #
+  class << self
+    def deliver(date)     
+      # 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")
+      
+      # Create png file
+      c = Cost.new
+      c.easy_energy_tariff_barplot(Date.today)
+      
+      mail = Mail.new do
+        delivery_method :smtp, smtp_opts
+        to      'a.t.van.halteren@vu.nl'
+        from    'SmartMeter <aart@van-halteren.net>'
+        subject "EasyEnergy tariffs for #{date}"
+
+        text_part do
+          body "Tariffs for #{date}\n"
+        end
+      
+        html_part do
+          content_type 'text/html; charset=UTF-8'
+          body "<h1>Tariffs for #{date}"
+        end 
+        
+        # add attachment
+        filename = "easy_tariff_%s.png" % date.strftime("%F")
+        add_file :filename => filename, :content => File.read("plots/%s" % filename) 
+      end
+      
+      mail.deliver!
+    end
+  end
+end
\ No newline at end of file
diff --git a/app/models/cost.rb b/app/models/cost.rb
index 44c1967..b2369c3 100644
--- a/app/models/cost.rb
+++ b/app/models/cost.rb
@@ -90,7 +90,7 @@ class Cost
     title = "Tarief per kwH (incl. belastingen en BTW) - %s" % date.strftime("%A, %e %B %Y")
     xlabel = "uur"
     ylabel = "EUR"
-    GR.savefig("easy_tariff_%s.png" % date.strftime("%F"), title: title, xlabel: xlabel, ylabel: ylabel)
+    GR.savefig("plots/easy_tariff_%s.png" % date.strftime("%F"), title: title, xlabel: xlabel, ylabel: ylabel)
   end
   
   def easy_energy_cost_barplot(date)