refinance saving

Author: pathikrit

server/src/main/scala/services/MortgageApiImpl.scala

@@ -16,7 +16,7 @@ object MortgageApiImpl {
   }
 
   def refinancePenalty(mortgage: Mortgage, newApr: Double): Double = {
-    println(s"refinance($mortgage, $newApr)")
-    0
+    def totalInterest(m: Mortgage) = payments(m).map(_.interest).sum
+    totalInterest(mortgage) - totalInterest(mortgage.copy(apr = newApr))
   }
 }

shared/src/main/scala/api/Mortgage.scala

@@ -9,8 +9,8 @@ object Mortgage {
   // TODO: Validator here
 
   object API {
-    val payments = new RPC[Mortgage, Seq[Payment]]("/mortgage/payments")
-    val refinancePenalty  = new RPC[(Mortgage, Double), Double]("/mortgage/refinance")
+    val payments         = new RPC[Mortgage, Seq[Payment]]("/mortgage/payments")
+    val refinancePenalty = new RPC[(Mortgage, Double), Double]("/mortgage/refinance")
   }
 }
 

web/src/main/scala/views/MortgageCalculator.scala

@@ -65,3 +65,12 @@ object MortgageCalculator extends framework.Page("mortgage_calculator") {
     ).render)
   }
 }
+
+
+/*
+ * Mon, Aug 28: FE (ScalaJs Tour) + FE Dependency management
+ * Tue, Aug 29: RPC
+ * Wed, Aug 30: BE: Server
+ * Thu, Sep  1: BE: Shared
+ * Fri, Sep  2: ScalaCSS + Tooling
+ */