Add monpreset.txt loader (#675)

d2app/app.go

@@ -270,6 +270,7 @@ func (a *App) loadDataDict() error {
 		{d2resource.MonsterSound, d2datadict.LoadMonsterSounds},
 		{d2resource.MonsterSequence, d2datadict.LoadMonsterSequences},
 		{d2resource.PlayerClass, d2datadict.LoadPlayerClasses},
+		{d2resource.MonsterPlacement, d2datadict.LoadMonsterPlacements},
 	}
 
 	d2datadict.InitObjectRecords()

d2common/d2data/d2datadict/monster_placement.go

@@ -0,0 +1,27 @@
+package d2datadict
+
+import (
+	"log"
+
+	"github.com/OpenDiablo2/OpenDiablo2/d2common"
+)
+
+// MonsterPlacementRecord represents a line from MonPlace.txt.
+type MonsterPlacementRecord string
+
+// MonsterPlacements stores the MonsterPlacementRecords.
+var MonsterPlacements []MonsterPlacementRecord //nolint:gochecknoglobals // Currently global by design
+
+// LoadMonsterPlacements loads the MonsterPlacementRecords into MonsterPlacements.
+func LoadMonsterPlacements(file []byte) {
+	d := d2common.LoadDataDictionary(file)
+	for d.Next() {
+		MonsterPlacements = append(MonsterPlacements, MonsterPlacementRecord(d.String("code")))
+	}
+
+	if d.Err != nil {
+		panic(d.Err)
+	}
+
+	log.Printf("Loaded %d MonsterPlacement records", len(MonsterPlacements))
+}

d2common/d2resource/resource_paths.go

@@ -322,6 +322,7 @@ const (
 	MonType      = "/data/global/excel/Montype.txt"
 	SuperUniques = "/data/global/excel/SuperUniques.txt"
 	MonMode      = "/data/global/excel/monmode.txt"
+	MonsterPlacement = "/data/global/excel/MonPlace.txt"
 
 	// --- Skill Data ---