refactor: banish TheInternet

TheInternet hasn't existed as a single node for a long time.

We also move & export the IsInternetNode predicate so it can be used
in more places.

render/detailed/connections.go

@@ -107,7 +107,7 @@ func (c *connectionCounters) add(outgoing bool, localNode, remoteNode, localEndp
 }
 
 func internetAddr(node report.Node, ep report.Node) (string, bool) {
-	if !isInternetNode(node) {
+	if !render.IsInternetNode(node) {
 		return "", true
 	}
 	_, addr, _, ok := report.ParseEndpointNodeID(ep.ID)
@@ -181,15 +181,15 @@ func incomingConnectionsSummary(topologyID string, r report.Report, n report.Nod
 	}
 
 	columnHeaders := NormalColumns
-	if isInternetNode(n) {
+	if render.IsInternetNode(n) {
 		columnHeaders = InternetColumns
 	}
 	return ConnectionsSummary{
 		ID:          "incoming-connections",
 		TopologyID:  topologyID,
 		Label:       "Inbound",
 		Columns:     columnHeaders,
-		Connections: counts.rows(r, ns, isInternetNode(n)),
+		Connections: counts.rows(r, ns, render.IsInternetNode(n)),
 	}
 }
 
@@ -213,15 +213,15 @@ func outgoingConnectionsSummary(topologyID string, r report.Report, n report.Nod
 	}
 
 	columnHeaders := NormalColumns
-	if isInternetNode(n) {
+	if render.IsInternetNode(n) {
 		columnHeaders = InternetColumns
 	}
 	return ConnectionsSummary{
 		ID:          "outgoing-connections",
 		TopologyID:  topologyID,
 		Label:       "Outbound",
 		Columns:     columnHeaders,
-		Connections: counts.rows(r, ns, isInternetNode(n)),
+		Connections: counts.rows(r, ns, render.IsInternetNode(n)),
 	}
 }
 
@@ -264,7 +264,3 @@ func canonicalEndpointID(copies map[string]string, id string) string {
 	}
 	return id
 }
-
-func isInternetNode(n report.Node) bool {
-	return n.ID == render.IncomingInternetID || n.ID == render.OutgoingInternetID
-}

render/detailed/summary.go

@@ -79,7 +79,6 @@ var renderers = map[string]func(NodeSummary, report.Node) (NodeSummary, bool){
 }
 
 var templates = map[string]struct{ Label, LabelMinor string }{
-	render.TheInternetID:      {render.InboundMajor, ""},
 	render.IncomingInternetID: {render.InboundMajor, render.InboundMinor},
 	render.OutgoingInternetID: {render.OutboundMajor, render.OutboundMinor},
 }

render/filters.go

@@ -268,7 +268,7 @@ func DoesNotHaveLabel(labelKey string, labelValue string) FilterFunc {
 // IsNotPseudo returns true if the node is not a pseudo node
 // or internet/service nodes.
 func IsNotPseudo(n report.Node) bool {
-	return n.Topology != Pseudo || strings.HasSuffix(n.ID, TheInternetID) || strings.HasPrefix(n.ID, ServiceNodeIDPrefix)
+	return n.Topology != Pseudo || IsInternetNode(n) || strings.HasPrefix(n.ID, ServiceNodeIDPrefix)
 }
 
 // IsNamespace checks if the node is a pod/service in the specified namespace

render/id.go

@@ -9,11 +9,15 @@ import (
 
 // Constants are used in the tests.
 const (
-	TheInternetID      = "theinternet"
-	IncomingInternetID = "in-" + TheInternetID
-	OutgoingInternetID = "out-" + TheInternetID
+	IncomingInternetID = "in-theinternet"
+	OutgoingInternetID = "out-theinternet"
 )
 
+// IsInternetNode determines whether the node represents the Internet.
+func IsInternetNode(n report.Node) bool {
+	return n.ID == IncomingInternetID || n.ID == OutgoingInternetID
+}
+
 // MakePseudoNodeID joins the parts of an id into the id of a pseudonode
 func MakePseudoNodeID(parts ...string) string {
 	return strings.Join(append([]string{"pseudo"}, parts...), ":")

report/id.go

@@ -5,9 +5,6 @@ import (
 	"strings"
 )
 
-// TheInternet is used as a node ID to indicate a remote IP.
-const TheInternet = "theinternet"
-
 // Delimiters are used to separate parts of node IDs, to guarantee uniqueness
 // in particular contexts.
 const (