refactor code to fewer files; remove unused code

main.go

@@ -3,29 +3,27 @@ package main
 import (
 	"fmt"
 	"github.com/google/uuid"
-	"go-nkode/core/api"
-	"go-nkode/core/model"
-	"go-nkode/core/nkode"
+	"go-nkode/core"
 	"log"
 	"net/http"
 )
 
 func main() {
 	//db := nkode.NewInMemoryDb()
-	db := nkode.NewSqliteDB("nkode.db")
+	db := core.NewSqliteDB("nkode.db")
 	defer db.CloseDb()
-	nkodeApi := nkode.NewNKodeAPI(db)
+	nkodeApi := core.NewNKodeAPI(db)
 	AddDefaultCustomer(nkodeApi)
-	handler := model.NKodeHandler{Api: &nkodeApi}
+	handler := core.NKodeHandler{Api: nkodeApi}
 	mux := http.NewServeMux()
-	mux.Handle(api.CreateNewCustomer, &handler)
-	mux.Handle(api.GenerateSignupInterface, &handler)
-	mux.Handle(api.SetNKode, &handler)
-	mux.Handle(api.ConfirmNKode, &handler)
-	mux.Handle(api.GetLoginInterface, &handler)
-	mux.Handle(api.Login, &handler)
-	mux.Handle(api.RenewAttributes, &handler)
-	mux.Handle(api.RandomSvgInterface, &handler)
+	mux.Handle(core.CreateNewCustomer, &handler)
+	mux.Handle(core.GenerateSignupInterface, &handler)
+	mux.Handle(core.SetNKode, &handler)
+	mux.Handle(core.ConfirmNKode, &handler)
+	mux.Handle(core.GetLoginInterface, &handler)
+	mux.Handle(core.Login, &handler)
+	mux.Handle(core.RenewAttributes, &handler)
+	mux.Handle(core.RandomSvgInterface, &handler)
 	fmt.Println("Running on localhost:8080...")
 	log.Fatal(http.ListenAndServe("localhost:8080", corsMiddleware(mux)))
 }
@@ -48,13 +46,13 @@ func corsMiddleware(next http.Handler) http.Handler {
 	})
 }
 
-func AddDefaultCustomer(api nkode.NKodeAPI) {
+func AddDefaultCustomer(api core.NKodeAPI) {
 	newId, err := uuid.Parse("ed9ed6e0-082c-4b57-8d8c-f00ed6493457")
 	if err != nil {
 		log.Fatal(err)
 	}
-	customerId := model.CustomerId(newId)
-	nkode_policy := model.NewDefaultNKodePolicy()
+	customerId := core.CustomerId(newId)
+	nkode_policy := core.NewDefaultNKodePolicy()
 	_, err = api.CreateNewCustomer(nkode_policy, &customerId)
 	if err != nil {
 		log.Print(err)