mirror of
https://github.com/advplyr/audiobookshelf.git
synced 2024-12-20 19:06:06 +01:00
187 lines
5.7 KiB
JavaScript
187 lines
5.7 KiB
JavaScript
const { xmlToJSON } = require('../index')
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const htmlSanitizer = require('../htmlSanitizer')
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function parseCreators(metadata) {
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if (!metadata['dc:creator']) return null
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const creators = metadata['dc:creator']
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if (!creators.length) return null
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return creators.map(c => {
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if (typeof c !== 'object' || !c['$'] || !c['_']) return false
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return {
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value: c['_'],
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role: c['$']['opf:role'] || null,
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fileAs: c['$']['opf:file-as'] || null
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}
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})
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}
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function fetchCreators(creators, role) {
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if (!creators?.length) return null
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return [...new Set(creators.filter(c => c.role === role && c.value).map(c => c.value))]
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}
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function fetchTagString(metadata, tag) {
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if (!metadata[tag] || !metadata[tag].length) return null
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let value = metadata[tag][0]
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/*
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EXAMPLES:
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"dc:title": [
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{
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"_": "The Quest for Character",
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"$": {
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"opf:file-as": "Quest for Character What the Story of Socrates and Alcibiades"
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}
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}
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]
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OR
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"dc:title": [
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"The Quest for Character"
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]
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*/
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if (typeof value === 'object') value = value._
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if (typeof value !== 'string') return null
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return value
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}
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function fetchDate(metadata) {
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const date = fetchTagString(metadata, 'dc:date')
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if (!date) return null
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const dateSplit = date.split('-')
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if (!dateSplit.length || dateSplit[0].length !== 4 || isNaN(dateSplit[0])) return null
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return dateSplit[0]
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}
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function fetchPublisher(metadata) {
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return fetchTagString(metadata, 'dc:publisher')
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}
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function fetchISBN(metadata) {
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if (!metadata['dc:identifier'] || !metadata['dc:identifier'].length) return null
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const identifiers = metadata['dc:identifier']
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const isbnObj = identifiers.find(i => i['$'] && i['$']['opf:scheme'] === 'ISBN')
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return isbnObj ? isbnObj['_'] || null : null
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}
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function fetchASIN(metadata) {
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if (!metadata['dc:identifier'] || !metadata['dc:identifier'].length) return null
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const identifiers = metadata['dc:identifier']
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const asinObj = identifiers.find(i => i['$'] && i['$']['opf:scheme'] === 'ASIN')
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return asinObj ? asinObj['_'] || null : null
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}
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function fetchTitle(metadata) {
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return fetchTagString(metadata, 'dc:title')
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}
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function fetchSubtitle(metadata) {
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return fetchTagString(metadata, 'dc:subtitle')
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}
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function fetchDescription(metadata) {
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let description = fetchTagString(metadata, 'dc:description')
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if (!description) return null
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// check if description is HTML or plain text. only plain text allowed
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// calibre stores < and > as < and >
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description = description.replace(/</g, '<').replace(/>/g, '>')
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return htmlSanitizer.stripAllTags(description)
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}
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function fetchGenres(metadata) {
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if (!metadata['dc:subject'] || !metadata['dc:subject'].length) return []
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return [...new Set(metadata['dc:subject'].filter(g => g && typeof g === 'string'))]
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}
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function fetchLanguage(metadata) {
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return fetchTagString(metadata, 'dc:language')
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}
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function fetchSeries(metadataMeta) {
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if (!metadataMeta) return []
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const result = []
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for (let i = 0; i < metadataMeta.length; i++) {
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if (metadataMeta[i].$?.name === "calibre:series" && metadataMeta[i].$.content?.trim()) {
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const name = metadataMeta[i].$.content.trim()
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let sequence = null
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if (metadataMeta[i + 1]?.$?.name === "calibre:series_index" && metadataMeta[i + 1].$?.content?.trim()) {
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sequence = metadataMeta[i + 1].$.content.trim()
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}
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result.push({ name, sequence })
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}
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}
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return result
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}
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function fetchNarrators(creators, metadata) {
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const narrators = fetchCreators(creators, 'nrt')
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if (narrators?.length) return narrators
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try {
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const narratorsJSON = JSON.parse(fetchTagString(metadata.meta, "calibre:user_metadata:#narrators").replace(/"/g, '"'))
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return narratorsJSON["#value#"]
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} catch {
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return null
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}
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}
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function fetchTags(metadata) {
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if (!metadata['dc:tag'] || !metadata['dc:tag'].length) return []
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return [...new Set(metadata['dc:tag'].filter(tag => tag && typeof tag === 'string'))]
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}
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function stripPrefix(str) {
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if (!str) return ''
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return str.split(':').pop()
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}
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module.exports.parseOpfMetadataJson = (json) => {
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// Handle <package ...> or with prefix <ns0:package ...>
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const packageKey = Object.keys(json).find(key => stripPrefix(key) === 'package')
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if (!packageKey) return null
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const prefix = packageKey.split(':').shift()
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let metadata = prefix ? json[packageKey][`${prefix}:metadata`] || json[packageKey].metadata : json[packageKey].metadata
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if (!metadata) return null
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if (Array.isArray(metadata)) {
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if (!metadata.length) return null
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metadata = metadata[0]
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}
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const metadataMeta = prefix ? metadata[`${prefix}:meta`] || metadata.meta : metadata.meta
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metadata.meta = {}
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if (metadataMeta?.length) {
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metadataMeta.forEach((meta) => {
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if (meta && meta['$'] && meta['$'].name) {
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metadata.meta[meta['$'].name] = [meta['$'].content || '']
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}
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})
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}
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const creators = parseCreators(metadata)
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const authors = (fetchCreators(creators, 'aut') || []).map(au => au?.trim()).filter(au => au)
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const narrators = (fetchNarrators(creators, metadata) || []).map(nrt => nrt?.trim()).filter(nrt => nrt)
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return {
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title: fetchTitle(metadata),
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subtitle: fetchSubtitle(metadata),
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authors,
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narrators,
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publishedYear: fetchDate(metadata),
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publisher: fetchPublisher(metadata),
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isbn: fetchISBN(metadata),
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asin: fetchASIN(metadata),
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description: fetchDescription(metadata),
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genres: fetchGenres(metadata),
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language: fetchLanguage(metadata),
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series: fetchSeries(metadataMeta),
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tags: fetchTags(metadata)
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}
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}
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module.exports.parseOpfMetadataXML = async (xml) => {
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const json = await xmlToJSON(xml)
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if (!json) return null
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return this.parseOpfMetadataJson(json)
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} |