Skip converting already converted books

.gitignore

@@ -3,4 +3,7 @@
 *.m4b
 
 # Config files
-settings.conf
+settings.conf
+
+# Other
+**/

README.md

@@ -1,2 +1,20 @@
 # audible-converter
 
+## Setup
+
+Install [FFmpeg](https://ffmpeg.org/download.html) and [jq](https://stedolan.github.io/jq/download/)
+
+### Fedora
+
+```sh
+sudo dnf install ffmpeg jq
+```
+
+## Usage
+
+1. Download audiobook from Audible in .aax format.
+2. Run the following command
+```sh
+./audible-converter.sh [Path to Audiobook file]
+```
+3. A converted file will be saved in the current directory.

audible-converter.py

@@ -0,0 +1,151 @@
+import configparser
+from requests import get
+from feedgen.feed import FeedGenerator
+import datetime
+import os
+import re
+import json
+import sys
+
+# osSafeName() convertes a string to an OS safe name.
+def osSafeName(name):
+    return re.sub(r'[^a-zA-Z0-9 -]', '', name).lower().replace(' ', '-').replace('--', '-')
+
+class AudibleBook(object):
+
+    def __init__(self, filePath, activationBytes, targetDir):
+        self.filePath = filePath
+        self.activationBytes = activationBytes
+        self.targetDir = targetDir
+        self.convertedFilePath=''
+        self.metadata = json.loads(os.popen('ffprobe -i {} -show_format \
+            -print_format json'.format(filePath)).read())['format']['tags']
+        self.chapters = json.loads(os.popen('ffprobe -i {} -print_format json \
+            -show_chapters -loglevel error -sexagesimal'.format(self.filePath))
+                          .read())['chapters']
+
+    # getPath() returns path to origonal audible file.
+    def getPath(self):
+        return self.filePath
+
+    # getMetadata() returns audio metadata for a given filepath.
+    def getMetadata(self):
+        return self.metadata
+
+    # getChapters() returns chapter metadata for a given filepath.
+    def getChapters(self):
+        return self.chapters
+
+    # getTitle() returns audiobook title.
+    def getTitle(self):
+        return self.getMetadata()['title']
+
+    def getAuthor(self):
+        return self.getMetadata()['artist']
+
+    def setTargetDir(self, targetDir):
+        self.targetDir = targetDir
+
+    def removeDRM(self, fileName):
+        filePath = '{}/{}.m4b'.format(self.targetDir, fileName)
+        if not os.path.exists(filePath):
+            os.system('ffmpeg -activation_bytes {} -i {} -c copy "{}"'
+                      .format(self.activationBytes, self.filePath, filePath))
+        self.convertedFilePath = filePath
+
+    def splitChapters(self):
+        for c in self.getChapters():
+            start=c['start_time']
+            end=c['end_time']
+            title=c['tags']['title']
+            outFilePath = '{}-{}.m4a'.format(os.path.splitext(self.convertedFilePath)[0],
+                                             osSafeName(title))
+            if not os.path.exists(outFilePath):
+                os.system('ffmpeg -i {} -acodec copy -vcodec copy -ss {} -t {} {}'.
+                          format(self.convertedFilePath, start, end, outFilePath))
+    def getCover(self):
+        outFilePath = '{}/cover.jpg'.format(self.targetDir)
+        if not os.path.exists(outFilePath):
+            os.system('ffmpeg -i {} -an -vcodec copy {}'.
+                      format(self.convertedFilePath, outFilePath))
+
+    def deleteConverted(self):
+        if self.convertedFilePath is not '' and os.path.exists(self.configFilePath):
+            os.remove(self.convertedFilePath) 
+        
+
+# getHash() returns the hash of a given file.
+def getHash(filePath):
+    with open(filePath, 'rb') as f:
+        f.seek(653)
+        data = f.read(20)
+        f.close()
+    return data.hex()
+
+# getActivationBytes returns the bytes needed to decrypt a given hash. 
+def getActivationBytes(filehash):
+    headers = {'User-Agent': 'audible-converter'}
+    response = get('https://aax.api.j-kit.me/api/v2/activation/{}'.format(filehash),
+                   headers=headers)
+    return json.loads(response.text)['activationBytes']
+
+# createConfig() creates a config file.
+def createConfig(configFilePath, filePath):
+    activationBytes = getActivationBytes(getHash(filePath))
+    f = open(configFilePath, 'w')
+    f.write('activationBytes={}'.format(activationBytes))
+    f.close()
+    
+configFilePath='./settings.conf'
+audibleBookPath=sys.argv[1]
+serverURL=sys.argv[2]
+targetDir='./audiobooks'
+
+# Check if config file exists and creates one if needed.
+if not os.path.exists(configFilePath):
+    print('Creating config file')
+    createConfig(configFilePath, audibleBookPath)
+    
+configString = '[Settings]\n' + open(configFilePath).read()
+configParser = configparser.RawConfigParser()
+configParser.read_string(configString)
+activationBytes=configParser.get('Settings', 'activationBytes')
+    
+book = AudibleBook(audibleBookPath, activationBytes, targetDir)
+
+name = osSafeName(book.getTitle())
+outputDir = '{}/{}'.format(targetDir, name)
+if not os.path.exists(outputDir):
+    os.makedirs(outputDir)
+book.setTargetDir(outputDir)
+
+rssFilePath='{}/rss.xml'.format(outputDir)
+
+if not os.path.exists(rssFilePath):
+    book.removeDRM(name)
+    book.splitChapters()
+    book.getCover()
+
+fg = FeedGenerator()
+fg.id(name)
+fg.title(book.getTitle())
+fg.author( {'name': book.getAuthor()} )
+fg.link( href='https://audible.com', rel='alternate' )
+fg.logo('{}/{}/cover.jpg'.format(serverURL, name))
+fg.subtitle(book.getMetadata()['copyright'])
+fg.language('en')
+
+count = 0
+for c in book.getChapters():
+    key = osSafeName(c['tags']['title'])
+    fe = fg.add_entry()
+    fe.id(key)
+    fe.title(c['tags']['title'])
+    fe.link(href='{0}/{1}/{1}-{2}.m4a'.format(serverURL, name, key))
+    fe.enclosure('{0}/{1}/{1}-{2}.m4a'.format(serverURL, name, key), 0, 'audio')
+    fe.published(datetime.datetime(int(book.getMetadata()['date']), 6, 1, 0, count, tzinfo=datetime.timezone.utc))
+    count += 1
+
+rssfeed  = fg.rss_str(pretty=True)
+fg.rss_file(rssFilePath)
+book.deleteConverted()

audible-converter.sh

@@ -1,5 +1,9 @@
 #!/usr/bin/env bash
 
+cleanString() {
+     tr -d '"'
+}
+
 # getHash returns the hash of a given file.
 function getHash() {
     echo $(xxd -p -l20 -s 653 ${1})
@@ -7,8 +11,8 @@ function getHash() {
 
 # getActivationBytes returns the bytes needed to decrypt a given hash. 
 function getActivationBytes() {
-    json=$(curl -A 'Christian Colglazier' https://aax.api.j-kit.me/api/v2/activation/${1})
+    json=$(curl -A 'audible-converter' https://aax.api.j-kit.me/api/v2/activation/${1})
-    echo $(echo $json | jq '.activationBytes' | tr -d '"')
+    echo $(echo $json | jq '.activationBytes' | cleanString)
 }
 
 # createConfig creates a config file.
@@ -27,11 +31,11 @@ function checkAudibleFile() {
 }
 
 function removeDRM() {
-    ffmpeg -activation_bytes ${2} -i ${1} -c copy "$(basename ${1} | cut -f 1 -d '.').m4b"
+    ffmpeg -activation_bytes ${2} -i ${1} -c copy "${3}.m4b"
 }
 
 function getChapterJSON() {
-    echo $(ffprobe -i ${1} -print_format json -show_chapters -loglevel error -sexagesimal)
+    echo $(ffprobe -i ${1} -print_format json -show_chapters -loglevel error -sexagesimal | jq '.chapters')
 }
 
 function getMetadataJSON() {
@@ -39,7 +43,11 @@ function getMetadataJSON() {
 }
 
 function getTitle() {
-    echo $(echo ${1} | jq '.title')
+    echo $(echo ${1} | jq '.title' | cleanString)
+}
+
+function fileSafe() {
+     sed -e 's/[^A-Za-z0-9._-]/-/g' | tr '[:upper:]' '[:lower:]' | sed -e 's/--/-/g'
 }
 
 settingsFile='./settings.conf'
@@ -57,5 +65,18 @@ fi
 . $settingsFile
 
 metadataJSON=$(getMetadataJSON $audibleFile)
-json=$(getMetadataJSON $audibleFile)
+chapterJSON=$(getChapterJSON $audibleFile)
-removeDRM $audibleFile $activationBytes
+name=$(getTitle "${metadataJSON}" | fileSafe)
+
+if [ ! -f "${name}.m4b" ]; then
+    removeDRM $audibleFile $activationBytes $name
+fi
+
+mkdir -p $name
+
+data=$(echo "${chapterJSON}" | jq '.[] | "\(.start),\(.end),\(.tags.title)"')
+echo $data
+IFS=' ' read -r -a array <<< "$data"
+
+
+echo $(echo "${chapterJSON}" | jq '.[] | .start,.end,.tags.title')