reorganize the moroz service (#8)

Did a lot of cleaning up and reorganized code to follow a simple 1 file per endpoint model.
Each method of the santa.Service now corresponds to a svc_*.go file in the moroz package.
The implementation of the service method lives at the top, followed by boilerplate to create a go-kit endpoint and the
necessary http transport decode function. Finally any service middleware is written below.

The middleware.go file is for declaring middleware on santa.Service.

The server.go file is for registering HTTP routes with gorilla/mux.

.gitignore

@@ -6,3 +6,5 @@ cmd/*/*.key
 cmd/*/*/*.toml
 cmd/*/build/*
 cmd/moroz/moroz
+server.crt
+server.key

cmd/moroz/main.go

@@ -9,9 +9,12 @@ import (
 	"net/http/httputil"
 	"os"
 
+	"github.com/groob/moroz/santa"
+
 	stdlog "log"
 
 	"github.com/go-kit/kit/log"
+	"github.com/gorilla/mux"
 	"github.com/groob/moroz/moroz"
 	"github.com/groob/moroz/santaconfig"
 	"github.com/micromdm/go4/version"
@@ -71,24 +74,36 @@ func main() {
 		os.Exit(2)
 	}
 
-	repo := santaconfig.NewFileRepo(*flConfigs)
-	svc, err := moroz.NewService(repo, *flEvents)
-	if err != nil {
-		stdlog.Fatal(err)
-	}
 	logger := log.NewLogfmtLogger(os.Stderr)
-	h := moroz.MakeAPIHandler(svc, logger)
-	if *flHTTPDebug {
-		h = debugHTTPmiddleware(h)
+
+	repo := santaconfig.NewFileRepo(*flConfigs)
+	var svc santa.Service
+	{
+		s, err := moroz.NewService(repo, *flEvents)
+		if err != nil {
+			stdlog.Fatal(err)
+		}
+		svc = s
+		svc = moroz.LoggingMiddleware(logger)(svc)
 	}
 
-	http.Handle("/v1/santa/", h)
+	endpoints := moroz.MakeServerEndpoints(svc)
+
+	var h http.Handler
+	{
+		r := mux.NewRouter()
+		h = r
+		moroz.AddHTTPRoutes(r, endpoints, logger)
+		if *flHTTPDebug {
+			h = debugHTTPmiddleware(h)
+		}
+	}
 
 	go func() { fmt.Println("started server") }()
 	stdlog.Fatal(http.ListenAndServeTLS(*flAddr,
 		*flTLSCert,
 		*flTLSKey,
-		nil))
+		h))
 }
 
 func validateConfigExists(configsPath string) bool {

moroz/middleware.go

@@ -0,0 +1,19 @@
+package moroz
+
+import (
+	"github.com/go-kit/kit/log"
+	"github.com/groob/moroz/santa"
+)
+
+type Middleware func(santa.Service) santa.Service
+
+func LoggingMiddleware(logger log.Logger) Middleware {
+	return func(next santa.Service) santa.Service {
+		return logmw{logger, next}
+	}
+}
+
+type logmw struct {
+	logger log.Logger
+	next   santa.Service
+}