mirror of
https://github.com/advplyr/audiobookshelf.git
synced 2024-12-20 19:06:06 +01:00
123 lines
3.6 KiB
JavaScript
123 lines
3.6 KiB
JavaScript
const axios = require('axios')
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const { levenshteinDistance } = require('../utils/index')
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const Logger = require('../Logger')
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const { RateLimiter } = require('limiter')
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class Audnexus {
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static _instance = null
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constructor() {
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// ensures Audnexus class is singleton
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if (Audnexus._instance) {
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return Audnexus._instance
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}
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this.baseUrl = 'https://api.audnex.us'
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// @see https://github.com/laxamentumtech/audnexus#-deployment-
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this.limiter = new RateLimiter({
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tokensPerInterval: 100,
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fireImmediately: true,
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interval: 'minute',
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})
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Audnexus._instance = this
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}
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authorASINsRequest(name, region) {
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name = encodeURIComponent(name)
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const regionQuery = region ? `®ion=${region}` : ''
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const authorRequestUrl = `${this.baseUrl}/authors?name=${name}${regionQuery}`
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Logger.info(`[Audnexus] Searching for author "${authorRequestUrl}"`)
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return this._processRequest(() => axios.get(authorRequestUrl))
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.then((res) => res.data || [])
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.catch((error) => {
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Logger.error(`[Audnexus] Author ASIN request failed for ${name}`, error)
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return []
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})
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}
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authorRequest(asin, region) {
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asin = encodeURIComponent(asin)
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const regionQuery = region ? `?region=${region}` : ''
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const authorRequestUrl = `${this.baseUrl}/authors/${asin}${regionQuery}`
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Logger.info(`[Audnexus] Searching for author "${authorRequestUrl}"`)
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return this._processRequest(() => axios.get(authorRequestUrl))
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.then((res) => res.data)
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.catch((error) => {
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Logger.error(`[Audnexus] Author request failed for ${asin}`, error)
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return null
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})
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}
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/**
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* @description Process a request with a rate limiter
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*
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* @param {*} request
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* @returns
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*/
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async _processRequest(request) {
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const remainingTokens = await this.limiter.removeTokens(1)
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Logger.info(`[Audnexus] Attempting request with ${remainingTokens} remaining tokens and ${this.limiter.tokensThisInterval} this interval`)
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if (remainingTokens >= 1) {
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return request()
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}
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// 100 tokens(requests) per minute give a refresh of ~1.67 per second,
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// so a 10 second wait will yield ~16.7 additional tokens
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Logger.info('[Audnexus] Sleeping for 10 seconds')
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await new Promise(resolve => setTimeout(resolve, 10000))
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return this._processRequest(request)
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}
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async findAuthorByASIN(asin, region) {
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const author = await this.authorRequest(asin, region)
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return author ?
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{
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asin: author.asin,
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description: author.description,
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image: author.image || null,
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name: author.name
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} : null
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}
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async findAuthorByName(name, region, maxLevenshtein = 3) {
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Logger.debug(`[Audnexus] Looking up author by name ${name}`)
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const asins = await this.authorASINsRequest(name, region)
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const matchingAsin = asins.find(obj => levenshteinDistance(obj.name, name) <= maxLevenshtein)
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if (!matchingAsin) {
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return null
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}
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const author = await this.authorRequest(matchingAsin.asin)
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return author ?
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{
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description: author.description,
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image: author.image || null,
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asin: author.asin,
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name: author.name
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} : null
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}
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getChaptersByASIN(asin, region) {
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Logger.debug(`[Audnexus] Get chapters for ASIN ${asin}/${region}`)
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return this._processRequest(() => axios.get(`${this.baseUrl}/books/${asin}/chapters?region=${region}`))
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.then((res) => res.data)
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.catch((error) => {
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Logger.error(`[Audnexus] Chapter ASIN request failed for ${asin}/${region}`, error)
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return null
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})
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}
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}
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module.exports = Audnexus |