up3

server/item/written_book.go

@@ -0,0 +1,76 @@
+package item
+
+// WrittenBook is the item created after a book and quill is signed. It appears the same as a regular book, but
+// without the quill, and has an enchanted-looking glint.
+type WrittenBook struct {
+	// Title is the title of the book.
+	Title string
+	// Author is the author of the book.
+	Author string
+	// Generation is the copy tier of the book. 0 = original, 1 = copy of original,
+	// 2 = copy of copy.
+	Generation WrittenBookGeneration
+	// Pages represents the pages within the book.
+	Pages []string
+}
+
+// MaxCount always returns 16.
+func (WrittenBook) MaxCount() int {
+	return 16
+}
+
+// TotalPages returns the total number of pages in the book.
+func (w WrittenBook) TotalPages() int {
+	return len(w.Pages)
+}
+
+// Page returns a specific page from the book and true when the page exists. It will otherwise return an empty string
+// and false.
+func (w WrittenBook) Page(page int) (string, bool) {
+	if page < 0 || len(w.Pages) <= page {
+		return "", false
+	}
+	return w.Pages[page], true
+}
+
+// DecodeNBT ...
+func (w WrittenBook) DecodeNBT(data map[string]any) any {
+	if pages, ok := data["pages"].([]any); ok {
+		w.Pages = make([]string, len(pages))
+		for i, page := range pages {
+			w.Pages[i] = page.(map[string]any)["text"].(string)
+		}
+	}
+	w.Title, _ = data["title"].(string)
+	w.Author, _ = data["author"].(string)
+	if v, ok := data["generation"].(uint8); ok {
+		switch v {
+		case 0:
+			w.Generation = OriginalGeneration()
+		case 1:
+			w.Generation = CopyGeneration()
+		case 2:
+			w.Generation = CopyOfCopyGeneration()
+		}
+	}
+	return w
+}
+
+// EncodeNBT ...
+func (w WrittenBook) EncodeNBT() map[string]any {
+	pages := make([]any, 0, len(w.Pages))
+	for _, page := range w.Pages {
+		pages = append(pages, map[string]any{"text": page})
+	}
+	return map[string]any{
+		"pages":      pages,
+		"author":     w.Author,
+		"title":      w.Title,
+		"generation": w.Generation.Uint8(),
+	}
+}
+
+// EncodeItem ...
+func (WrittenBook) EncodeItem() (name string, meta int16) {
+	return "minecraft:written_book", 0
+}