d2datadict: Add Montype.txt loader (#637)

d2app/app.go

@@ -223,6 +223,7 @@ func (a *App) loadDataDict() error {
 		{d2resource.MonStats2, d2datadict.LoadMonStats2},
 		{d2resource.MonPreset, d2datadict.LoadMonPresets},
 		{d2resource.MonProp, d2datadict.LoadMonProps},
+		{d2resource.MonType, d2datadict.LoadMonTypes},
 		{d2resource.MagicPrefix, d2datadict.LoadMagicPrefix},
 		{d2resource.MagicSuffix, d2datadict.LoadMagicSuffix},
 		{d2resource.ItemStatCost, d2datadict.LoadItemStatCosts},

d2common/d2data/d2datadict/montype.go

@@ -0,0 +1,48 @@
+package d2datadict
+
+import (
+	"log"
+
+	"github.com/OpenDiablo2/OpenDiablo2/d2common"
+)
+
+// MonTypeRecord is a representation of a single row of MonType.txt.
+type MonTypeRecord struct {
+	Type   string
+	Equiv1 string
+	Equiv2 string
+	Equiv3 string
+	// StrSing is the string displayed for the singular form (Skeleton), note
+	// that this is unused in the original engine, since the only modifier
+	// display code that accesses MonType uses StrPlur.
+	StrSing   string
+	StrPlural string
+	// EOL int // unused
+}
+
+// MonTypes stores all of the MonTypeRecords
+var MonTypes map[string]*MonTypeRecord //nolint:gochecknoglobals // Currently global by design, only written once
+
+// LoadMonTypes loads MonType records into a map[string]*MonTypeRecord
+func LoadMonTypes(file []byte) {
+	MonTypes = make(map[string]*MonTypeRecord)
+
+	d := d2common.LoadDataDictionary(file)
+	for d.Next() {
+		record := &MonTypeRecord{
+			Type:      d.String("type"),
+			Equiv1:    d.String("equiv1"),
+			Equiv2:    d.String("equiv2"),
+			Equiv3:    d.String("equiv3"),
+			StrSing:   d.String("strsing"),
+			StrPlural: d.String("strplur"),
+		}
+		MonTypes[record.Type] = record
+	}
+
+	if d.Err != nil {
+		panic(d.Err)
+	}
+
+	log.Printf("Loaded %d MonType records", len(MonTypes))
+}

d2common/d2resource/resource_paths.go

@@ -301,6 +301,7 @@ const (
 	MonStats     = "/data/global/excel/monstats.txt"
 	MonStats2    = "/data/global/excel/monstats2.txt"
 	MonPreset    = "/data/global/excel/monpreset.txt"
+	MonType      = "/data/global/excel/Montype.txt"
 	SuperUniques = "/data/global/excel/SuperUniques.txt"
 
 	// --- Skill Data ---