Add:Epub metadata parser and cover extractor #1479

server/utils/parsers/parseEbookMetadata.js

@@ -0,0 +1,42 @@
+const parseEpubMetadata = require('./parseEpubMetadata')
+
+/**
+ * @typedef EBookFileScanData
+ * @property {string} path
+ * @property {string} ebookFormat
+ * @property {string} ebookCoverPath internal image path
+ * @property {import('../../scanner/BookScanner').BookMetadataObject} metadata
+ */
+
+/**
+ * Parse metadata from ebook file
+ * 
+ * @param {import('../../models/Book').EBookFileObject} ebookFile 
+ * @returns {Promise<EBookFileScanData>}
+ */
+async function parse(ebookFile) {
+  if (!ebookFile) return null
+
+  if (ebookFile.ebookFormat === 'epub') {
+    return parseEpubMetadata.parse(ebookFile.metadata.path)
+  }
+  return null
+}
+module.exports.parse = parse
+
+/**
+ * Extract cover from ebook file
+ * 
+ * @param {EBookFileScanData} ebookFileScanData 
+ * @param {string} outputCoverPath 
+ * @returns {Promise<boolean>}
+ */
+async function extractCoverImage(ebookFileScanData, outputCoverPath) {
+  if (!ebookFileScanData?.ebookCoverPath) return false
+
+  if (ebookFileScanData.ebookFormat === 'epub') {
+    return parseEpubMetadata.extractCoverImage(ebookFileScanData.path, ebookFileScanData.ebookCoverPath, outputCoverPath)
+  }
+  return false
+}
+module.exports.extractCoverImage = extractCoverImage