feat(npc): expose monstats flags with undead/demon helpers

(cherry picked from commit 52a2eaa082724d36af249114b73558e5b4905a85)

cmd/txttocode/templates.go

@@ -75,6 +75,62 @@ var Desc = map[int]Description{
 {{- end }}
 }`
 
+const templateMonStats = `// Code generated by cmd/txttocode. DO NOT EDIT.
+// source: cmd/txttocode/txt/monstats.txt
+package npc
+
+type MonStatsFlags struct {
+	ID           int    // ID is the unit class ID (hcIdx) and matches npc.ID.
+	ClassID      string // ClassID is the monstats Id string used to link with other txt files.
+	Name         string // Name is the key used for the unit display name.
+	IsEnabled    bool   // IsEnabled is true when the unit is allowed to exist/spawn.
+	CanSpawn     bool   // CanSpawn is true when the unit can be spawned by area generation.
+	IsKillable   bool   // IsKillable is true when the unit can take damage and die.
+	IsNPC        bool   // IsNPC is true when the unit is classified as an NPC.
+	IsInTown     bool   // IsInTown is true when the unit is allowed in town.
+	CanInteract  bool   // CanInteract is true when the player can interact instead of attack.
+	HasInventory bool   // HasInventory is true when the unit can carry/generate items (like town merchants).
+	IsRanged     bool   // IsRanged is true when the unit is classified as a ranged type.
+	IsMelee      bool   // IsMelee is true when the unit is classified as melee-only.
+	IsLUndead    bool   // IsLUndead is true when the unit is low undead (undead resurrectable).
+	IsHUndead    bool   // IsHUndead is true when the unit is high undead (undead not resurrectable).
+	IsDemon      bool   // IsDemon is true when the unit is classified as a demon.
+	IsBoss       bool   // IsBoss is true when the unit is classified as a boss.
+	IsPrimeEvil  bool   // IsPrimeEvil is true when the unit is an act-end (Prime Evil) boss.
+}
+
+var MonStatsFlagsByID = map[ID]MonStatsFlags{
+{{- range $key, $value := . }}
+	{{ default (index $value "*hcIdx") (index $value "hcIdx") }}: {ID: {{ default (index $value "*hcIdx") (index $value "hcIdx") }}, ClassID: "{{ $value.Id }}", Name: "{{ $value.NameStr }}", IsEnabled: {{ if eq $value.enabled "1" }}true{{ else }}false{{ end }}, CanSpawn: {{ if eq $value.isSpawn "1" }}true{{ else }}false{{ end }}, IsKillable: {{ if eq $value.killable "1" }}true{{ else }}false{{ end }}, IsNPC: {{ if eq $value.npc "1" }}true{{ else }}false{{ end }}, IsInTown: {{ if eq $value.inTown "1" }}true{{ else }}false{{ end }}, CanInteract: {{ if eq $value.interact "1" }}true{{ else }}false{{ end }}, HasInventory: {{ if eq $value.inventory "1" }}true{{ else }}false{{ end }}, IsRanged: {{ if eq $value.rangedtype "1" }}true{{ else }}false{{ end }}, IsMelee: {{ if eq $value.isMelee "1" }}true{{ else }}false{{ end }}, IsLUndead: {{ if eq $value.lUndead "1" }}true{{ else }}false{{ end }}, IsHUndead: {{ if eq $value.hUndead "1" }}true{{ else }}false{{ end }}, IsDemon: {{ if eq $value.demon "1" }}true{{ else }}false{{ end }}, IsBoss: {{ if eq $value.boss "1" }}true{{ else }}false{{ end }}, IsPrimeEvil: {{ if eq $value.primeevil "1" }}true{{ else }}false{{ end }}},
+{{- end }}
+}
+
+func MonStatsFlagsForID(id ID) (MonStatsFlags, bool) {
+	flags, ok := MonStatsFlagsByID[id]
+	return flags, ok
+}
+
+func IsUndead(id ID) bool {
+	flags, ok := MonStatsFlagsForID(id)
+	return ok && (flags.IsLUndead || flags.IsHUndead)
+}
+
+func IsDemon(id ID) bool {
+	flags, ok := MonStatsFlagsForID(id)
+	return ok && flags.IsDemon
+}
+
+func IsBeast(id ID) bool {
+	flags, ok := MonStatsFlagsForID(id)
+	return ok && !flags.IsLUndead && !flags.IsHUndead && !flags.IsDemon
+}
+
+func IsUndeadOrDemon(id ID) bool {
+	flags, ok := MonStatsFlagsForID(id)
+	return ok && (flags.IsLUndead || flags.IsHUndead || flags.IsDemon)
+}
+`
+
 const templateEntrances = `// Code generated by cmd/txttocode. DO NOT EDIT.
 // source: cmd/txttocode/txt/lvlwarp.txt
 package entrance