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Update:Parse epub cover image uses cover specified in opf meta #3201

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advplyr 2024-07-28 14:34:31 -05:00
parent 88693d73bd
commit b524cbd1b3
1 changed files with 38 additions and 21 deletions
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27
server/utils/parsers/parseEpubMetadata.js
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@ -4,7 +4,6 @@ const StreamZip = require('../../libs/nodeStreamZip')
const parseOpfMetadata = require('./parseOpfMetadata') const parseOpfMetadata = require('./parseOpfMetadata')
const { xmlToJSON } = require('../index') const { xmlToJSON } = require('../index')
/** /**
* Extract file from epub and return string content * Extract file from epub and return string content
* *
@ -49,7 +48,10 @@ async function extractXmlToJson(epubPath, xmlFilepath) {
async function extractCoverImage(epubPath, epubImageFilepath, outputCoverPath) { async function extractCoverImage(epubPath, epubImageFilepath, outputCoverPath) {
const zip = new StreamZip.async({ file: epubPath }) const zip = new StreamZip.async({ file: epubPath })
const success = await zip.extract(epubImageFilepath, outputCoverPath).then(() => true).catch((error) => { const success = await zip
.extract(epubImageFilepath, outputCoverPath)
.then(() => true)
.catch((error) => {
Logger.error(`[parseEpubMetadata] Failed to extract image ${epubImageFilepath} from epub at "${epubPath}"`, error) Logger.error(`[parseEpubMetadata] Failed to extract image ${epubImageFilepath} from epub at "${epubPath}"`, error)
return false return false
}) })
@ -89,7 +91,7 @@ async function parse(ebookFile) {
} }
// Parse metadata from package document opf file // Parse metadata from package document opf file
const opfMetadata = parseOpfMetadata.parseOpfMetadataJson(packageJson) const opfMetadata = parseOpfMetadata.parseOpfMetadataJson(structuredClone(packageJson))
if (!opfMetadata) { if (!opfMetadata) {
Logger.error(`Unable to parse metadata in package doc with json`, JSON.stringify(packageJson, null, 2)) Logger.error(`Unable to parse metadata in package doc with json`, JSON.stringify(packageJson, null, 2))
return null return null
@ -101,8 +103,23 @@ async function parse(ebookFile) {
metadata: opfMetadata metadata: opfMetadata
} }
// Attempt to find filepath to cover image // Attempt to find filepath to cover image:
const manifestFirstImage = packageJson.package?.manifest?.[0]?.item?.find(item => item.$?.['media-type']?.startsWith('image/')) // Metadata may include <meta name="cover" content="id"/> where content is the id of the cover image in the manifest
// Otherwise the first image in the manifest is used as the cover image
let packageMetadata = packageJson.package?.metadata
if (Array.isArray(packageMetadata)) {
packageMetadata = packageMetadata[0]
}
const metaCoverId = packageMetadata?.meta?.find?.((meta) => meta.$?.name === 'cover')?.$?.content
let manifestFirstImage = null
if (metaCoverId) {
manifestFirstImage = packageJson.package?.manifest?.[0]?.item?.find((item) => item.$?.id === metaCoverId)
}
if (!manifestFirstImage) {
manifestFirstImage = packageJson.package?.manifest?.[0]?.item?.find((item) => item.$?.['media-type']?.startsWith('image/'))
}
let coverImagePath = manifestFirstImage?.$?.href let coverImagePath = manifestFirstImage?.$?.href
if (coverImagePath) { if (coverImagePath) {
const packageDirname = Path.dirname(packageDocPath) const packageDirname = Path.dirname(packageDocPath)