Release EPUB Tools 0.2.0

src/epub/package.ts

@@ -19,6 +19,15 @@ function firstDirect(parent: Element, name: string): Element | undefined {
   return directChildrenByLocalName(parent, name)[0];
 }
 
+function enumeration<T extends string>(
+  value: string | null | undefined,
+  allowed: readonly T[],
+  fallback: T,
+): T {
+  const normalized = value?.trim().toLowerCase() as T | undefined;
+  return normalized && allowed.includes(normalized) ? normalized : fallback;
+}
+
 export function parsePackageDocument(
   packageXml: string,
   packagePath: string,
@@ -49,6 +58,12 @@ export function parsePackageDocument(
       .map((item) => text(item))
       .filter(Boolean),
   };
+  const uniqueIdentifier = root.getAttribute("unique-identifier") ?? undefined;
+  const identifierElements = elementsByLocalName(metadataElement, "identifier");
+  const uniqueIdentifierValue =
+    identifierElements
+      .find((element) => element.getAttribute("id") === uniqueIdentifier)
+      ?.textContent?.trim() ?? metadata.identifier;
   const packageDirectory = directoryOf(packagePath);
   const manifest: ManifestItem[] = directChildrenByLocalName(
     manifestElement,
@@ -93,16 +108,52 @@ export function parsePackageDocument(
   const ncx =
     (ncxId ? byId.get(ncxId) : undefined) ??
     manifest.find((item) => item.mediaType === "application/x-dtbncx+xml");
+  const rendition = new Map(
+    elementsByLocalName(metadataElement, "meta")
+      .map(
+        (element) =>
+          [element.getAttribute("property") ?? "", text(element)] as const,
+      )
+      .filter(([property]) => property.startsWith("rendition:")),
+  );
   return {
     package: {
       version: root.getAttribute("version") ?? "",
-      uniqueIdentifier: root.getAttribute("unique-identifier") ?? undefined,
+      uniqueIdentifier,
+      uniqueIdentifierValue,
       packagePath,
       packageDirectory,
       metadata,
       manifest,
       spine,
       navigation: [],
+      direction: enumeration(
+        root.getAttribute("dir"),
+        ["ltr", "rtl", "auto"],
+        "auto",
+      ),
+      pageProgressionDirection: enumeration(
+        spineElement.getAttribute("page-progression-direction"),
+        ["ltr", "rtl", "default"],
+        "default",
+      ),
+      rendition: {
+        layout: enumeration(
+          rendition.get("rendition:layout"),
+          ["reflowable", "pre-paginated"],
+          "reflowable",
+        ),
+        orientation: enumeration(
+          rendition.get("rendition:orientation"),
+          ["auto", "landscape", "portrait"],
+          "auto",
+        ),
+        spread: enumeration(
+          rendition.get("rendition:spread"),
+          ["auto", "none", "landscape", "portrait", "both"],
+          "auto",
+        ),
+      },
       cover,
       nav,
       ncx,