feat: finalize with step 5

chapter-2-state-driven-agent-design/westworldwithmessaging/names.go

@@ -2,13 +2,23 @@ package westworldwithmessaging
 
 import "fmt"
 
+// entMinerBob and entElsa are our own stand-ins for the book's
+// enumerated entity IDs (referenced as "ent_Miner_Bob" and "ent_Elsa"
+// - presumably from an enum in a header we haven't been shown). Since
+// this demo only ever has these two fixed characters, plain named
+// constants do the same job: giving call sites a readable name
+// instead of a bare number.
+const (
+	entMinerBob = 1
+	entElsa     = 2
+)
+
 // entityNames is a temporary stand-in for the book's real name
 // lookup table. We still haven't been shown that table, so this is
-// just a small map we're filling in by hand as we meet entities -
-// the miner (ID 1) and now his wife Elsa (ID 2).
+// just a small map we're filling in by hand as we meet entities.
 var entityNames = map[int]string{
-	1: "Miner Bob",
-	2: "Elsa",
+	entMinerBob: "Miner Bob",
+	entElsa:     "Elsa",
 }
 
 // GetNameOfEntity looks up a friendly name for a given entity ID.