d2datadict: Add books.txt loader (#640)

d2app/app.go

@@ -214,6 +214,7 @@ func (a *App) loadDataDict() error {
 		{d2resource.ObjectDetails, d2datadict.LoadObjects},
 		{d2resource.Weapons, d2datadict.LoadWeapons},
 		{d2resource.Armor, d2datadict.LoadArmors},
+		{d2resource.Books, d2datadict.LoadBooks},
 		{d2resource.Misc, d2datadict.LoadMiscItems},
 		{d2resource.UniqueItems, d2datadict.LoadUniqueItems},
 		{d2resource.Missiles, d2datadict.LoadMissiles},

d2common/d2data/d2datadict/books.go

@@ -0,0 +1,54 @@
+package d2datadict
+
+import (
+	"log"
+
+	"github.com/OpenDiablo2/OpenDiablo2/d2common"
+)
+
+// BooksRecord is a representation of a row from books.txt
+type BooksRecord struct {
+	Name            string
+	Namco           string // The displayed name, where the string prefix is "Tome"
+	Completed       string
+	ScrollSpellCode string
+	BookSpellCode   string
+	pSpell          int
+	SpellIcon       int
+	ScrollSkill     string
+	BookSkill       string
+	BaseCost        int
+	CostPerCharge   int
+}
+
+// Books stores all of the BooksRecords
+var Books map[string]*BooksRecord //nolint:gochecknoglobals // Currently global by design, only written once
+
+// LoadBooks loads Books records into a map[string]*BooksRecord
+func LoadBooks(file []byte) {
+	Books = make(map[string]*BooksRecord)
+
+	d := d2common.LoadDataDictionary(file)
+	for d.Next() {
+		record := &BooksRecord{
+			Name:            d.String("Name"),
+			Namco:           d.String("Namco"),
+			Completed:       d.String("Completed"),
+			ScrollSpellCode: d.String("ScrollSpellCode"),
+			BookSpellCode:   d.String("BooksSpellCode"),
+			pSpell:          d.Number("pSpell"),
+			SpellIcon:       d.Number("SpellIcon"),
+			ScrollSkill:     d.String("ScrollSkill"),
+			BookSkill:       d.String("BookSkill"),
+			BaseCost:        d.Number("BaseCost"),
+			CostPerCharge:   d.Number("CostPerCharge"),
+		}
+		Books[record.Namco] = record
+	}
+
+	if d.Err != nil {
+		panic(d.Err)
+	}
+
+	log.Printf("Loaded %d book items", len(Books))
+}

d2common/d2resource/resource_paths.go

@@ -212,6 +212,7 @@ const (
 	Inventory   = "/data/global/excel/inventory.txt"
 	Weapons     = "/data/global/excel/weapons.txt"
 	Armor       = "/data/global/excel/armor.txt"
+	Books       = "/data/global/excel/books.txt"
 	Misc        = "/data/global/excel/misc.txt"
 	UniqueItems = "/data/global/excel/UniqueItems.txt"
 	Gems        = "/data/global/excel/gems.txt"