Fix:Unescaped characters in description causing issues with m4b merging

server/utils/stringEscaper.js

@@ -0,0 +1,5 @@
+function escapeString(string) {
+  return string.replace(/[.*"+?^${}()|[\]\\]/g, '\\$&');
+}
+
+module.exports.escapeString = escapeString

server/utils/toneHelpers.js

@@ -2,6 +2,7 @@ const tone = require('node-tone')
 const fs = require('../libs/fsExtra')
 const Logger = require('../Logger')
 const { secondsToTimestamp } = require('./index')
+const stringEscaper = require('./stringEscaper')
 
 module.exports.writeToneChaptersFile = (chapters, filePath) => {
   var chaptersTxt = ''
@@ -72,6 +73,67 @@ module.exports.getToneMetadataObject = (libraryItem, chaptersFile) => {
   return metadataObject
 }
 
+module.exports.getEscapedToneMetadataObject = (libraryItem, chaptersFile) => {
+  const coverPath = libraryItem.media.coverPath
+  const bookMetadata = libraryItem.media.metadata
+
+  const metadataObject = {
+    'Title': bookMetadata.title || '',
+    'Album': bookMetadata.title || '',
+    'TrackTotal': libraryItem.media.tracks.length
+  }
+  const additionalFields = []
+
+  if (bookMetadata.subtitle) {
+    metadataObject['Subtitle'] = bookMetadata.subtitle
+  }
+  if (bookMetadata.authorName) {
+    metadataObject['Artist'] = bookMetadata.authorName
+    metadataObject['AlbumArtist'] = bookMetadata.authorName
+  }
+  if (bookMetadata.description) {
+    metadataObject['Comment'] = stringEscaper.escapeString(bookMetadata.description)
+    metadataObject['Description'] = stringEscaper.escapeString(bookMetadata.description)
+  }
+  if (bookMetadata.narratorName) {
+    metadataObject['Narrator'] = bookMetadata.narratorName
+    metadataObject['Composer'] = bookMetadata.narratorName
+  }
+  if (bookMetadata.firstSeriesName) {
+    metadataObject['MovementName'] = bookMetadata.firstSeriesName
+  }
+  if (bookMetadata.firstSeriesSequence) {
+    metadataObject['Movement'] = bookMetadata.firstSeriesSequence
+  }
+  if (bookMetadata.genres.length) {
+    metadataObject['Genre'] = bookMetadata.genres.join('/')
+  }
+  if (bookMetadata.publisher) {
+    metadataObject['Publisher'] = bookMetadata.publisher
+  }
+  if (bookMetadata.asin) {
+    additionalFields.push(`ASIN=${bookMetadata.asin}`)
+  }
+  if (bookMetadata.isbn) {
+    additionalFields.push(`ISBN=${bookMetadata.isbn}`)
+  }
+  if (coverPath) {
+    metadataObject['CoverFile'] = coverPath
+  }
+  if (parsePublishedYear(bookMetadata.publishedYear)) {
+    metadataObject['PublishingDate'] = parsePublishedYear(bookMetadata.publishedYear)
+  }
+  if (chaptersFile) {
+    metadataObject['ChaptersFile'] = chaptersFile
+  }
+
+  if (additionalFields.length) {
+    metadataObject['AdditionalFields'] = additionalFields
+  }
+
+  return metadataObject
+}
+
 module.exports.tagAudioFile = (filePath, payload) => {
   return tone.tag(filePath, payload).then((data) => {
     return true