Cost calculations

app/models/entsoe.rb

@@ -0,0 +1,35 @@
+#
+# Obtain energy prices from Entsoe (transparancy platform)
+# See https://transparency.entsoe.eu/content/static_content/Static%20content/web%20api/Guide.html
+#
+
+require 'open-uri'
+require 'nokogiri'
+
+class Entsoe 
+  
+  URL = 'https://transparency.entsoe.eu'
+
+  def initialize(api_key)
+    @api_key = api_key
+  end
+  
+  def day_ahead_prices(date)
+    start_date = date.beginning_of_day
+    end_date = date.end_of_day
+    
+    # A44 - Document type => Price Document
+    # A01 - Process type => Day Ahead
+    # NL =  '10YNL----------L'
+    
+    domain = '10YNL----------L'      
+    url = URL + "/api?securityToken=%s&documentType=A44&processType=A01&in_Domain=%s&out_Domain=%s&periodStart=%s&periodEnd=%s" % [@api_key, domain, domain, start_date.iso8601, end_date.iso8601]
+    p url
+  end
+  
+  private
+  
+    def base_request(url)
+      doc = Nokogiri::XML(URI.open(url))
+    end 
+end