Debug messages. Squashed Add Route bugs and few others.

router/route.go

@@ -1,6 +1,11 @@
 package router
 
-import "context"
+import (
+	"fmt"
+	"strings"
+
+	"github.com/olekukonko/tablewriter"
+)
 
 var (
 	// DefaultLocalMetric is default route cost for local network
@@ -19,6 +24,18 @@ const (
 	IgnoreIfExists
 )
 
+// String returns human reprensentation of policy
+func (p AddPolicy) String() string {
+	switch p {
+	case OverrideIfExists:
+		return "OVERRIDE"
+	case IgnoreIfExists:
+		return "IGNORE"
+	default:
+		return "UNKNOWN"
+	}
+}
+
 // RouteOption is used to set routing table entry options
 type RouteOption func(*RouteOptions)
 
@@ -34,8 +51,6 @@ type RouteOptions struct {
 	Metric int
 	// Policy defines route addition policy
 	Policy AddPolicy
-	// Context stores other arbitrary options
-	Context context.Context
 }
 
 // DestAddr sets destination address
@@ -100,3 +115,26 @@ func NewRoute(opts ...RouteOption) Route {
 func (r *route) Options() RouteOptions {
 	return r.opts
 }
+
+// String allows to print the route
+func (r *route) String() string {
+	// this will help us build routing table string
+	sb := &strings.Builder{}
+
+	// create nice table printing structure
+	table := tablewriter.NewWriter(sb)
+	table.SetHeader([]string{"Destination", "Gateway", "Network", "Metric"})
+
+	strRoute := []string{
+		r.opts.DestAddr,
+		r.opts.Gateway.Address(),
+		r.opts.Network,
+		fmt.Sprintf("%d", r.opts.Metric),
+	}
+	table.Append(strRoute)
+
+	// render table into sb
+	table.Render()
+
+	return sb.String()
+}