mirror of
https://github.com/advplyr/audiobookshelf.git
synced 2025-10-27 11:18:14 +01:00
687 lines
26 KiB
JavaScript
687 lines
26 KiB
JavaScript
const OpenLibrary = require('../providers/OpenLibrary')
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const GoogleBooks = require('../providers/GoogleBooks')
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const Audible = require('../providers/Audible')
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const iTunes = require('../providers/iTunes')
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const Audnexus = require('../providers/Audnexus')
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const FantLab = require('../providers/FantLab')
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const AudiobookCovers = require('../providers/AudiobookCovers')
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const CustomProviderAdapter = require('../providers/CustomProviderAdapter')
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const Logger = require('../Logger')
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const { levenshteinDistance, levenshteinSimilarity, escapeRegExp, isValidASIN } = require('../utils/index')
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const htmlSanitizer = require('../utils/htmlSanitizer')
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class BookFinder {
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#providerResponseTimeout = 30000
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constructor() {
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this.openLibrary = new OpenLibrary()
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this.googleBooks = new GoogleBooks()
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this.audible = new Audible()
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this.iTunesApi = new iTunes()
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this.audnexus = new Audnexus()
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this.fantLab = new FantLab()
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this.audiobookCovers = new AudiobookCovers()
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this.customProviderAdapter = new CustomProviderAdapter()
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this.providers = ['google', 'itunes', 'openlibrary', 'fantlab', 'audiobookcovers', 'audible', 'audible.ca', 'audible.uk', 'audible.au', 'audible.fr', 'audible.de', 'audible.jp', 'audible.it', 'audible.in', 'audible.es']
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this.verbose = false
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}
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async findByISBN(isbn) {
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var book = await this.openLibrary.isbnLookup(isbn)
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if (book.errorCode) {
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Logger.error('Book not found')
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}
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return book
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}
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filterSearchResults(books, title, author, maxTitleDistance, maxAuthorDistance) {
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var searchTitle = cleanTitleForCompares(title)
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var searchAuthor = cleanAuthorForCompares(author)
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return books
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.map((b) => {
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b.cleanedTitle = cleanTitleForCompares(b.title)
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b.titleDistance = levenshteinDistance(b.cleanedTitle, title)
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// Total length of search (title or both title & author)
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b.totalPossibleDistance = b.title.length
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if (author) {
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if (!b.author) {
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b.authorDistance = author.length
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} else {
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b.totalPossibleDistance += b.author.length
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b.cleanedAuthor = cleanAuthorForCompares(b.author)
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var cleanedAuthorDistance = levenshteinDistance(b.cleanedAuthor, searchAuthor)
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var authorDistance = levenshteinDistance(b.author || '', author)
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// Use best distance
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b.authorDistance = Math.min(cleanedAuthorDistance, authorDistance)
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// Check book author contains searchAuthor
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if (searchAuthor.length > 4 && b.cleanedAuthor.includes(searchAuthor)) b.includesAuthor = searchAuthor
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else if (author.length > 4 && b.author.includes(author)) b.includesAuthor = author
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}
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}
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b.totalDistance = b.titleDistance + (b.authorDistance || 0)
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// Check book title contains the searchTitle
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if (searchTitle.length > 4 && b.cleanedTitle.includes(searchTitle)) b.includesTitle = searchTitle
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else if (title.length > 4 && b.title.includes(title)) b.includesTitle = title
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return b
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})
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.filter((b) => {
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if (b.includesTitle) {
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// If search title was found in result title then skip over leven distance check
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if (this.verbose) Logger.debug(`Exact title was included in "${b.title}", Search: "${b.includesTitle}"`)
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} else if (b.titleDistance > maxTitleDistance) {
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if (this.verbose) Logger.debug(`Filtering out search result title distance = ${b.titleDistance}: "${b.cleanedTitle}"/"${searchTitle}"`)
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return false
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}
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if (author) {
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if (b.includesAuthor) {
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// If search author was found in result author then skip over leven distance check
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if (this.verbose) Logger.debug(`Exact author was included in "${b.author}", Search: "${b.includesAuthor}"`)
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} else if (b.authorDistance > maxAuthorDistance) {
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if (this.verbose) Logger.debug(`Filtering out search result "${b.author}", author distance = ${b.authorDistance}: "${b.author}"/"${author}"`)
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return false
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}
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}
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// If book total search length < 5 and was not exact match, then filter out
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if (b.totalPossibleDistance < 5 && b.totalDistance > 0) return false
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return true
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})
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}
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/**
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*
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* @param {string} title
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* @param {string} author
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* @param {number} maxTitleDistance
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* @param {number} maxAuthorDistance
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* @returns {Promise<Object[]>}
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*/
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async getOpenLibResults(title, author, maxTitleDistance, maxAuthorDistance) {
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var books = await this.openLibrary.searchTitle(title, this.#providerResponseTimeout)
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if (this.verbose) Logger.debug(`OpenLib Book Search Results: ${books.length || 0}`)
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if (books.errorCode) {
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Logger.error(`OpenLib Search Error ${books.errorCode}`)
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return []
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}
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var booksFiltered = this.filterSearchResults(books, title, author, maxTitleDistance, maxAuthorDistance)
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if (!booksFiltered.length && books.length) {
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if (this.verbose) Logger.debug(`Search has ${books.length} matches, but no close title matches`)
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}
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booksFiltered.sort((a, b) => {
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return a.totalDistance - b.totalDistance
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})
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return booksFiltered
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}
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/**
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*
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* @param {string} title
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* @param {string} author
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* @returns {Promise<Object[]>}
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*/
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async getGoogleBooksResults(title, author) {
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var books = await this.googleBooks.search(title, author, this.#providerResponseTimeout)
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if (this.verbose) Logger.debug(`GoogleBooks Book Search Results: ${books.length || 0}`)
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if (books.errorCode) {
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Logger.error(`GoogleBooks Search Error ${books.errorCode}`)
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return []
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}
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// Google has good sort
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return books
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}
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/**
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*
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* @param {string} title
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* @param {string} author
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* @returns {Promise<Object[]>}
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*/
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async getFantLabResults(title, author) {
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var books = await this.fantLab.search(title, author, this.#providerResponseTimeout)
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if (this.verbose) Logger.debug(`FantLab Book Search Results: ${books.length || 0}`)
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if (books.errorCode) {
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Logger.error(`FantLab Search Error ${books.errorCode}`)
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return []
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}
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return books
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}
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/**
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*
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* @param {string} search
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* @returns {Promise<Object[]>}
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*/
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async getAudiobookCoversResults(search) {
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const covers = await this.audiobookCovers.search(search, this.#providerResponseTimeout)
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if (this.verbose) Logger.debug(`AudiobookCovers Search Results: ${covers.length || 0}`)
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return covers || []
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}
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/**
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*
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* @param {string} title
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* @returns {Promise<Object[]>}
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*/
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async getiTunesAudiobooksResults(title) {
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return this.iTunesApi.searchAudiobooks(title, this.#providerResponseTimeout)
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}
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/**
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*
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* @param {string} title
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* @param {string} author
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* @param {string} asin
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* @param {string} provider
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* @returns {Promise<Object[]>}
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*/
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async getAudibleResults(title, author, asin, provider) {
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const region = provider.includes('.') ? provider.split('.').pop() : ''
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const books = await this.audible.search(title, author, asin, region, this.#providerResponseTimeout)
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if (this.verbose) Logger.debug(`Audible Book Search Results: ${books.length || 0}`)
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if (!books) return []
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return books
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}
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/**
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*
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* @param {string} title
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* @param {string} author
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* @param {string} isbn
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* @param {string} providerSlug
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* @returns {Promise<Object[]>}
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*/
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async getCustomProviderResults(title, author, isbn, providerSlug) {
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try {
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const books = await this.customProviderAdapter.search(title, author, isbn, providerSlug, 'book', this.#providerResponseTimeout)
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if (this.verbose) Logger.debug(`Custom provider '${providerSlug}' Search Results: ${books.length || 0}`)
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return books
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} catch (error) {
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Logger.error(`Error searching Custom provider '${providerSlug}':`, error)
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return []
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}
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}
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static TitleCandidates = class {
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constructor(cleanAuthor) {
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this.candidates = new Set()
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this.cleanAuthor = cleanAuthor
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this.priorities = {}
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this.positions = {}
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this.currentPosition = 0
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}
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add(title) {
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// if title contains the author, remove it
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title = this.#removeAuthorFromTitle(title)
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const titleTransformers = [
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[/([,:;_]| by ).*/g, ''], // Remove subtitle
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[/(^| )\d+k(bps)?( |$)/, ' '], // Remove bitrate
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[/ (2nd|3rd|\d+th)\s+ed(\.|ition)?/g, ''], // Remove edition
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[/(^| |\.)(m4b|m4a|mp3)( |$)/g, ''], // Remove file-type
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[/ a novel.*$/g, ''], // Remove "a novel"
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[/(^| )(un)?abridged( |$)/g, ' '], // Remove "unabridged/abridged"
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[/^\d+ | \d+$/g, ''] // Remove preceding/trailing numbers
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]
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// Main variant
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const cleanTitle = cleanTitleForCompares(title).trim()
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if (!cleanTitle) return
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this.candidates.add(cleanTitle)
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this.priorities[cleanTitle] = 0
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this.positions[cleanTitle] = this.currentPosition
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let candidate = cleanTitle
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for (const transformer of titleTransformers) candidate = candidate.replace(transformer[0], transformer[1]).trim()
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if (candidate != cleanTitle) {
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if (candidate) {
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this.candidates.add(candidate)
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this.priorities[candidate] = 0
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this.positions[candidate] = this.currentPosition
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}
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this.priorities[cleanTitle] = 1
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}
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this.currentPosition++
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}
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get size() {
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return this.candidates.size
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}
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getCandidates() {
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var candidates = [...this.candidates]
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candidates.sort((a, b) => {
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// Candidates that include only digits are also likely low quality
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const onlyDigits = /^\d+$/
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const includesOnlyDigitsDiff = onlyDigits.test(a) - onlyDigits.test(b)
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if (includesOnlyDigitsDiff) return includesOnlyDigitsDiff
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// transformed candidates receive higher priority
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const priorityDiff = this.priorities[a] - this.priorities[b]
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if (priorityDiff) return priorityDiff
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// if same priorirty, prefer candidates that are closer to the beginning (e.g. titles before subtitles)
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const positionDiff = this.positions[a] - this.positions[b]
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return positionDiff // candidates with same priority always have different positions
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})
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Logger.debug(`[${this.constructor.name}] Found ${candidates.length} fuzzy title candidates`)
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Logger.debug(candidates)
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return candidates
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}
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delete(title) {
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return this.candidates.delete(title)
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}
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#removeAuthorFromTitle(title) {
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if (!this.cleanAuthor) return title
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const authorRe = new RegExp(`(^| | by |)${escapeRegExp(this.cleanAuthor)}(?= |$)`, 'g')
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const authorCleanedTitle = cleanAuthorForCompares(title)
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const authorCleanedTitleWithoutAuthor = authorCleanedTitle.replace(authorRe, '')
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if (authorCleanedTitleWithoutAuthor !== authorCleanedTitle) {
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return authorCleanedTitleWithoutAuthor.trim()
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}
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return title
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}
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}
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static AuthorCandidates = class {
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constructor(cleanAuthor, audnexus) {
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this.audnexus = audnexus
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this.candidates = new Set()
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this.cleanAuthor = cleanAuthor
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if (cleanAuthor) this.candidates.add(cleanAuthor)
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}
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validateAuthor(name, region = '', maxLevenshtein = 2) {
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return this.audnexus.authorASINsRequest(name, region).then((asins) => {
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for (const [i, asin] of asins.entries()) {
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if (i > 10) break
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let cleanName = cleanAuthorForCompares(asin.name)
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if (!cleanName) continue
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if (cleanName.includes(name)) return name
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if (name.includes(cleanName)) return cleanName
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if (levenshteinDistance(cleanName, name) <= maxLevenshtein) return cleanName
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}
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return ''
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})
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}
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add(author) {
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const cleanAuthor = cleanAuthorForCompares(author).trim()
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if (!cleanAuthor) return
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this.candidates.add(cleanAuthor)
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}
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get size() {
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return this.candidates.size
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}
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get agressivelyCleanAuthor() {
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if (this.cleanAuthor) {
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const agressivelyCleanAuthor = this.cleanAuthor.replace(/[,/-].*$/, '').trim()
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return agressivelyCleanAuthor ? agressivelyCleanAuthor : this.cleanAuthor
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}
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return ''
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}
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async getCandidates() {
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var filteredCandidates = []
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var promises = []
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for (const candidate of this.candidates) {
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promises.push(this.validateAuthor(candidate))
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}
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const results = [...new Set(await Promise.all(promises))]
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filteredCandidates = results.filter((author) => author)
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// If no valid candidates were found, add back an aggresively cleaned author version
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if (!filteredCandidates.length && this.cleanAuthor) filteredCandidates.push(this.agressivelyCleanAuthor)
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// Always add an empty author candidate
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filteredCandidates.push('')
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Logger.debug(`[${this.constructor.name}] Found ${filteredCandidates.length} fuzzy author candidates`)
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Logger.debug(filteredCandidates)
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return filteredCandidates
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}
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delete(author) {
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return this.candidates.delete(author)
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}
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}
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/**
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* Search for books including fuzzy searches
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*
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* @param {import('../models/LibraryItem')} libraryItem
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* @param {string} provider
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* @param {string} title
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* @param {string} author
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* @param {string} isbn
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* @param {string} asin
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* @param {{titleDistance:number, authorDistance:number, maxFuzzySearches:number}} options
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* @returns {Promise<Object[]>}
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*/
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async search(libraryItem, provider, title, author, isbn, asin, options = {}) {
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let books = []
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const maxTitleDistance = !isNaN(options.titleDistance) ? Number(options.titleDistance) : 4
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const maxAuthorDistance = !isNaN(options.authorDistance) ? Number(options.authorDistance) : 4
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const maxFuzzySearches = !isNaN(options.maxFuzzySearches) ? Number(options.maxFuzzySearches) : 5
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let numFuzzySearches = 0
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// Custom providers are assumed to be correct
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if (provider.startsWith('custom-')) {
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return this.getCustomProviderResults(title, author, isbn, provider)
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}
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if (!title) return books
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const isTitleAsin = isValidASIN(title.toUpperCase())
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let actualTitleQuery = title
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let actualAuthorQuery = author
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books = await this.runSearch(actualTitleQuery, actualAuthorQuery, provider, asin, maxTitleDistance, maxAuthorDistance)
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if (!books.length && maxFuzzySearches > 0) {
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// Normalize title and author
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title = title.trim().toLowerCase()
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author = author?.trim().toLowerCase() || ''
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const cleanAuthor = cleanAuthorForCompares(author)
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// Now run up to maxFuzzySearches fuzzy searches
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let authorCandidates = new BookFinder.AuthorCandidates(cleanAuthor, this.audnexus)
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// Remove underscores and parentheses with their contents, and replace with a separator
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const cleanTitle = title.replace(/\[.*?\]|\(.*?\)|{.*?}|_/g, ' - ')
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// Split title into hypen-separated parts
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const titleParts = cleanTitle.split(/ - | -|- /)
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for (const titlePart of titleParts) authorCandidates.add(titlePart)
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authorCandidates = await authorCandidates.getCandidates()
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loop_author: for (const authorCandidate of authorCandidates) {
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let titleCandidates = new BookFinder.TitleCandidates(authorCandidate)
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for (const titlePart of titleParts) titleCandidates.add(titlePart)
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titleCandidates = titleCandidates.getCandidates()
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for (const titleCandidate of titleCandidates) {
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if (titleCandidate == actualTitleQuery && authorCandidate == actualAuthorQuery) continue // We already tried this
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if (++numFuzzySearches > maxFuzzySearches) break loop_author
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actualTitleQuery = titleCandidate
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actualAuthorQuery = authorCandidate
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books = await this.runSearch(actualTitleQuery, actualAuthorQuery, provider, asin, maxTitleDistance, maxAuthorDistance)
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if (books.length) break loop_author
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}
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}
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}
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if (books.length) {
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const isAudibleProvider = provider.startsWith('audible')
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const libraryItemDurationMinutes = libraryItem?.media?.duration ? libraryItem.media.duration / 60 : null
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books.forEach((book) => {
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if (typeof book !== 'object' || !isAudibleProvider) return
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book.matchConfidence = this.calculateMatchConfidence(book, libraryItemDurationMinutes, actualTitleQuery, actualAuthorQuery, isTitleAsin)
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})
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if (isAudibleProvider && libraryItemDurationMinutes) {
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books.sort((a, b) => {
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const aDuration = a.duration || Number.POSITIVE_INFINITY
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const bDuration = b.duration || Number.POSITIVE_INFINITY
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const aDurationDiff = Math.abs(aDuration - libraryItemDurationMinutes)
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const bDurationDiff = Math.abs(bDuration - libraryItemDurationMinutes)
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return aDurationDiff - bDurationDiff
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})
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}
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}
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return books
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}
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/**
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* Calculate match confidence score for a book
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* @param {Object} book - The book object to calculate confidence for
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* @param {number|null} libraryItemDurationMinutes - Duration of library item in minutes
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* @param {string} actualTitleQuery - Actual title query
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* @param {string} actualAuthorQuery - Actual author query
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* @param {boolean} isTitleAsin - Whether the title is an ASIN
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* @returns {number|null} - Match confidence score or null if not applicable
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*/
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calculateMatchConfidence(book, libraryItemDurationMinutes, actualTitleQuery, actualAuthorQuery, isTitleAsin) {
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// ASIN results are always a match
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if (isTitleAsin) return 1.0
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let durationScore
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if (libraryItemDurationMinutes && typeof book.duration === 'number') {
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const durationDiff = Math.abs(book.duration - libraryItemDurationMinutes)
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// Duration scores:
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// diff | score
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// 0 | 1.0
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// 1 | 1.0
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// 2 | 0.9
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// 3 | 0.8
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// 4 | 0.7
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// 5 | 0.6
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// 6 | 0.48
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// 7 | 0.36
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// 8 | 0.24
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// 9 | 0.12
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// 10 | 0.0
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if (durationDiff <= 1) {
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// Covers durationDiff = 0 for score 1.0
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durationScore = 1.0
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} else if (durationDiff <= 5) {
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// (1, 5] - Score from 1.0 down to 0.6
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// Linearly interpolates between (1, 1.0) and (5, 0.6)
|
|
// Equation: y = 1.0 - 0.08 * x
|
|
durationScore = 1.1 - 0.1 * durationDiff
|
|
} else if (durationDiff <= 10) {
|
|
// (5, 10] - Score from 0.6 down to 0.0
|
|
// Linearly interpolates between (5, 0.6) and (10, 0.0)
|
|
// Equation: y = 1.2 - 0.12 * x
|
|
durationScore = 1.2 - 0.12 * durationDiff
|
|
} else {
|
|
// durationDiff > 10 - Score is 0.0
|
|
durationScore = 0.0
|
|
}
|
|
Logger.debug(`[BookFinder] Duration diff: ${durationDiff}, durationScore: ${durationScore}`)
|
|
} else {
|
|
// Default score if library item duration or book duration is not available
|
|
durationScore = 0.1
|
|
}
|
|
|
|
const calculateTitleScore = (titleQuery, book, keepSubtitle = false) => {
|
|
const cleanTitle = cleanTitleForCompares(book.title || '', keepSubtitle)
|
|
const cleanSubtitle = keepSubtitle && book.subtitle ? `: ${book.subtitle}` : ''
|
|
const normBookTitle = `${cleanTitle}${cleanSubtitle}`
|
|
const normTitleQuery = cleanTitleForCompares(titleQuery, keepSubtitle)
|
|
const titleSimilarity = levenshteinSimilarity(normTitleQuery, normBookTitle)
|
|
Logger.debug(`[BookFinder] keepSubtitle: ${keepSubtitle}, normBookTitle: ${normBookTitle}, normTitleQuery: ${normTitleQuery}, titleSimilarity: ${titleSimilarity}`)
|
|
return titleSimilarity
|
|
}
|
|
const titleQueryHasSubtitle = hasSubtitle(actualTitleQuery)
|
|
const titleScore = calculateTitleScore(actualTitleQuery, book, titleQueryHasSubtitle)
|
|
|
|
let authorScore
|
|
const normAuthorQuery = cleanAuthorForCompares(actualAuthorQuery)
|
|
const normBookAuthor = cleanAuthorForCompares(book.author || '')
|
|
if (!normAuthorQuery) {
|
|
// Original query had no author
|
|
authorScore = 1.0 // Neutral score
|
|
} else {
|
|
// Original query HAS an author (cleanedQueryAuthorForScore is not empty)
|
|
if (normBookAuthor) {
|
|
const bookAuthorParts = normBookAuthor.split(',').map((name) => name.trim().toLowerCase())
|
|
// Filter out empty parts that might result from ", ," or trailing/leading commas
|
|
const validBookAuthorParts = bookAuthorParts.filter((p) => p.length > 0)
|
|
|
|
if (validBookAuthorParts.length === 0) {
|
|
// Book author string was present but effectively empty (e.g. ",,")
|
|
// Since cleanedQueryAuthorForScore is non-empty here, this is a mismatch.
|
|
authorScore = 0.0
|
|
} else {
|
|
let maxPartScore = levenshteinSimilarity(normAuthorQuery, normBookAuthor)
|
|
Logger.debug(`[BookFinder] normAuthorQuery: ${normAuthorQuery}, normBookAuthor: ${normBookAuthor}, similarity: ${maxPartScore}`)
|
|
if (validBookAuthorParts.length > 1 || normBookAuthor.includes(',')) {
|
|
validBookAuthorParts.forEach((part) => {
|
|
// part is guaranteed to be non-empty here
|
|
// cleanedQueryAuthorForScore is also guaranteed non-empty here.
|
|
// levenshteinDistance lowercases by default, but part is already lowercased.
|
|
const similarity = levenshteinSimilarity(normAuthorQuery, part)
|
|
Logger.debug(`[BookFinder] normAuthorQuery: ${normAuthorQuery}, bookAuthorPart: ${part}, similarity: ${similarity}`)
|
|
const currentPartScore = similarity
|
|
maxPartScore = Math.max(maxPartScore, currentPartScore)
|
|
})
|
|
}
|
|
authorScore = maxPartScore
|
|
}
|
|
} else {
|
|
// Book has NO author (or not a string, or empty string)
|
|
// Query has an author (cleanedQueryAuthorForScore is non-empty), book does not.
|
|
authorScore = 0.0
|
|
}
|
|
}
|
|
|
|
const W_DURATION = 0.7
|
|
const W_TITLE = 0.2
|
|
const W_AUTHOR = 0.1
|
|
|
|
Logger.debug(`[BookFinder] Duration score: ${durationScore}, Title score: ${titleScore}, Author score: ${authorScore}`)
|
|
const confidence = W_DURATION * durationScore + W_TITLE * titleScore + W_AUTHOR * authorScore
|
|
Logger.debug(`[BookFinder] Confidence: ${confidence}`)
|
|
return Math.max(0, Math.min(1, confidence))
|
|
}
|
|
|
|
/**
|
|
* Search for books
|
|
*
|
|
* @param {string} title
|
|
* @param {string} author
|
|
* @param {string} provider
|
|
* @param {string} asin only used for audible providers
|
|
* @param {number} maxTitleDistance only used for openlibrary provider
|
|
* @param {number} maxAuthorDistance only used for openlibrary provider
|
|
* @returns {Promise<Object[]>}
|
|
*/
|
|
async runSearch(title, author, provider, asin, maxTitleDistance, maxAuthorDistance) {
|
|
Logger.debug(`Book Search: title: "${title}", author: "${author || ''}", provider: ${provider}`)
|
|
|
|
let books = []
|
|
|
|
if (provider === 'google') {
|
|
books = await this.getGoogleBooksResults(title, author)
|
|
} else if (provider.startsWith('audible')) {
|
|
books = await this.getAudibleResults(title, author, asin, provider)
|
|
} else if (provider === 'itunes') {
|
|
books = await this.getiTunesAudiobooksResults(title)
|
|
} else if (provider === 'openlibrary') {
|
|
books = await this.getOpenLibResults(title, author, maxTitleDistance, maxAuthorDistance)
|
|
} else if (provider === 'fantlab') {
|
|
books = await this.getFantLabResults(title, author)
|
|
} else if (provider === 'audiobookcovers') {
|
|
books = await this.getAudiobookCoversResults(title)
|
|
} else {
|
|
books = await this.getGoogleBooksResults(title, author)
|
|
}
|
|
|
|
books.forEach((book) => {
|
|
if (book.description) {
|
|
book.description = htmlSanitizer.sanitize(book.description)
|
|
book.descriptionPlain = htmlSanitizer.stripAllTags(book.description)
|
|
}
|
|
})
|
|
return books
|
|
}
|
|
|
|
async findCovers(provider, title, author, options = {}) {
|
|
let searchResults = []
|
|
|
|
if (provider === 'all') {
|
|
for (const providerString of this.providers) {
|
|
const providerResults = await this.search(null, providerString, title, author, options)
|
|
Logger.debug(`[BookFinder] Found ${providerResults.length} covers from ${providerString}`)
|
|
searchResults.push(...providerResults)
|
|
}
|
|
} else {
|
|
searchResults = await this.search(null, provider, title, author, options)
|
|
}
|
|
Logger.debug(`[BookFinder] FindCovers search results: ${searchResults.length}`)
|
|
|
|
const covers = []
|
|
searchResults.forEach((result) => {
|
|
if (result.covers && result.covers.length) {
|
|
covers.push(...result.covers)
|
|
}
|
|
if (result.cover) {
|
|
covers.push(result.cover)
|
|
}
|
|
})
|
|
return [...new Set(covers)]
|
|
}
|
|
|
|
findChapters(asin, region) {
|
|
return this.audnexus.getChaptersByASIN(asin, region)
|
|
}
|
|
}
|
|
module.exports = new BookFinder()
|
|
|
|
function hasSubtitle(title) {
|
|
return title.includes(':') || title.includes(' - ')
|
|
}
|
|
function stripSubtitle(title) {
|
|
if (title.includes(':')) {
|
|
return title.split(':')[0].trim()
|
|
} else if (title.includes(' - ')) {
|
|
return title.split(' - ')[0].trim()
|
|
}
|
|
return title
|
|
}
|
|
|
|
function replaceAccentedChars(str) {
|
|
try {
|
|
return str.normalize('NFD').replace(/[\u0300-\u036f]/g, '')
|
|
} catch (error) {
|
|
Logger.error('[BookFinder] str normalize error', error)
|
|
return str
|
|
}
|
|
}
|
|
|
|
function cleanTitleForCompares(title, keepSubtitle = false) {
|
|
if (!title) return ''
|
|
title = stripRedundantSpaces(title)
|
|
|
|
// Remove subtitle if there (i.e. "Cool Book: Coolest Ever" becomes "Cool Book")
|
|
let stripped = keepSubtitle ? title : stripSubtitle(title)
|
|
|
|
// Remove text in paranthesis (i.e. "Ender's Game (Ender's Saga)" becomes "Ender's Game")
|
|
let cleaned = stripped.replace(/ *\([^)]*\) */g, '')
|
|
|
|
// Remove single quotes (i.e. "Ender's Game" becomes "Enders Game")
|
|
cleaned = cleaned.replace(/'/g, '')
|
|
return replaceAccentedChars(cleaned).toLowerCase()
|
|
}
|
|
|
|
function cleanAuthorForCompares(author) {
|
|
if (!author) return ''
|
|
author = stripRedundantSpaces(author)
|
|
|
|
let cleanAuthor = replaceAccentedChars(author).toLowerCase()
|
|
// separate initials
|
|
cleanAuthor = cleanAuthor.replace(/([a-z])\.([a-z])/g, '$1. $2')
|
|
// remove middle initials
|
|
cleanAuthor = cleanAuthor.replace(/(?<=\w\w)(\s+[a-z]\.?)+(?=\s+\w\w)/g, '')
|
|
// remove et al.
|
|
cleanAuthor = cleanAuthor.replace(/ et al\.?(?= |$)/g, '')
|
|
return cleanAuthor
|
|
}
|
|
|
|
function stripRedundantSpaces(str) {
|
|
return str.replace(/\s+/g, ' ').trim()
|
|
}
|