Merge remote-tracking branch 'origin/master' into auth_passportjs

server/objects/files/EBookFile.js

@@ -16,7 +16,7 @@ class EBookFile {
   construct(file) {
     this.ino = file.ino
     this.metadata = new FileMetadata(file.metadata)
-    this.ebookFormat = file.ebookFormat
+    this.ebookFormat = file.ebookFormat || this.metadata.format
     this.addedAt = file.addedAt
     this.updatedAt = file.updatedAt
   }

server/objects/mediaTypes/Book.js

@@ -73,7 +73,7 @@ class Book {
       numInvalidAudioFiles: this.invalidAudioFiles.length,
       duration: this.duration,
       size: this.size,
-      ebookFormat: this.ebookFile ? this.ebookFile.ebookFormat : null
+      ebookFormat: this.ebookFile?.ebookFormat
     }
   }
 
@@ -90,7 +90,7 @@ class Book {
       size: this.size,
       tracks: this.tracks.map(t => t.toJSON()),
       missingParts: [...this.missingParts],
-      ebookFile: this.ebookFile ? this.ebookFile.toJSON() : null
+      ebookFile: this.ebookFile?.toJSON() || null
     }
   }