[Enhancement]: Ebooks onlyⓘ library setting

[danielb2]

Type of Enhancement

Server Backend

Describe the Feature/Enhancement

As there is a toggle for Audiobooks only in a library, it would be useful to have a Ebooks only setting.

Why would this be helpful?

ebooks are single files and do not need to be organized the same way in folders. For example, a common way to organize files is having files in subfolders in authors for epub, but not a subfolder per book. Current behavior means books are grouped together which is undesired.

Consider the difference here:

.
├── audiobooks
│  └── author
│     ├── title01
│     │  ├── chapter01.mp3
│     │  └── chapter02.mp3
│     └── title02
│        ├── chapter01.mp3
│        └── chapter02.mp3
└── ebooks
   └── author
      ├── title01.epub
      └── title02.epub

Example result current behavior:

Clearly these should be separate books, and I think for ebooks a simple recursive search will do.

Alternatively instead of a ebooks only setting, just handle epub differently

Future Implementation (Screenshot)

add ebooks only option here to force simple recursive scan for ebooks. I'm not sure if cbr or other formats are handled differently, but needing a folder per book for epub doesn't make so much sense

Audiobookshelf Server Version

v2.12.1

Current Implementation (Screenshot)

N/A

[nichwall]

Related to #2314 and #2338

[danielb2]

Closing since #2314 seems to mostly cover this. I'll add my comments there