Further consolidate the libraries

api/handler/options.go

@@ -0,0 +1,55 @@
+package handler
+
+import (
+	"github.com/micro/go-micro"
+	"github.com/micro/go-micro/api/router"
+)
+
+type Options struct {
+	Namespace string
+	Router    router.Router
+	Service   micro.Service
+}
+
+type Option func(o *Options)
+
+// NewOptions fills in the blanks
+func NewOptions(opts ...Option) Options {
+	var options Options
+	for _, o := range opts {
+		o(&options)
+	}
+
+	// create service if its blank
+	if options.Service == nil {
+		WithService(micro.NewService())(&options)
+	}
+
+	// set namespace if blank
+	if len(options.Namespace) == 0 {
+		WithNamespace("go.micro.api")(&options)
+	}
+
+	return options
+}
+
+// WithNamespace specifies the namespace for the handler
+func WithNamespace(s string) Option {
+	return func(o *Options) {
+		o.Namespace = s
+	}
+}
+
+// WithRouter specifies a router to be used by the handler
+func WithRouter(r router.Router) Option {
+	return func(o *Options) {
+		o.Router = r
+	}
+}
+
+// WithService specifies a micro.Service
+func WithService(s micro.Service) Option {
+	return func(o *Options) {
+		o.Service = s
+	}
+}