Add support for overdrive media marker file tag

This commit adds serverside support for grabbing the
overdrive_media_marker file tag that exists on mp3 files from overdrive

server/objects/metadata/AudioMetaTags.js

@@ -20,6 +20,7 @@ class AudioMetaTags {
     this.tagIsbn = null
     this.tagLanguage = null
     this.tagASIN = null
+    this.tagOverdriveMediaMarker = null
 
     if (metadata) {
       this.construct(metadata)
@@ -58,6 +59,7 @@ class AudioMetaTags {
     this.tagIsbn = metadata.tagIsbn || null
     this.tagLanguage = metadata.tagLanguage || null
     this.tagASIN = metadata.tagASIN || null
+    this.tagOverdriveMediaMarker = metadata.tagOverdriveMediaMarker || null
   }
 
   // Data parsed in prober.js
@@ -82,6 +84,7 @@ class AudioMetaTags {
     this.tagIsbn = payload.file_tag_isbn || null
     this.tagLanguage = payload.file_tag_language || null
     this.tagASIN = payload.file_tag_asin || null
+    this.tagOverdriveMediaMarker = payload.file_tag_overdrive_media_marker || null
   }
 
   updateData(payload) {
@@ -105,7 +108,8 @@ class AudioMetaTags {
       tagEncodedBy: payload.file_tag_encodedby || null,
       tagIsbn: payload.file_tag_isbn || null,
       tagLanguage: payload.file_tag_language || null,
-      tagASIN: payload.file_tag_asin || null
+      tagASIN: payload.file_tag_asin || null,
+      tagOverdriveMediaMarker: payload.file_tag_overdrive_media_marker || null,
     }
 
     var hasUpdates = false

server/objects/metadata/BookMetadata.js

@@ -262,6 +262,10 @@ class BookMetadata {
       {
         tag: 'tagASIN',
         key: 'asin'
+      },
+      {
+        tag: 'tagOverdriveMediaMarker',
+        key: 'overdriveMediaMarker'
       }
     ]
 

server/utils/prober.js

@@ -192,6 +192,7 @@ function parseTags(format, verbose) {
     file_tag_movement: tryGrabTags(format, 'movement', 'mvin'),
     file_tag_genre1: tryGrabTags(format, 'tmp_genre1', 'genre1'),
     file_tag_genre2: tryGrabTags(format, 'tmp_genre2', 'genre2'),
+    file_tag_overdrive_media_marker: tryGrabTags(format, 'OverDrive MediaMarkers'),
   }
   for (const key in tags) {
     if (!tags[key]) {