ReIntroduce "Hotspot Feature" for custom apps.

[MohitMaliFtechiz]

Describe the bug
We had the hotspot feature for custom apps, which was removed because of #1600. But we reintroduced it in #3487. At that moment, we were using the obb file for custom apps, and the server was working with obb file because it is a file. But later we introduced the Asset Play Delivery API for custom apps which was necessary to upload the bundle on the play store.

In this feature, we started uploading fd in bundles in chunks. The hotspot feature did not work with the fd chunks, so we hid it for custom apps in #3516.

However, Library needs a Book() object in this book object we are adding the Archive object with the fd list, and KiwixServer showing the language of this ZIM file on the server but the ZIM file is not listed there.

Expected behavior
It should list the ZIM file on the Server with the fd list.

Environment

• Version of Kiwix Android: 3.11.1
• Device: Google Pixel 7a
• OS version: Android 14

Logs after creating the Archive Object and before passing it to the Library

org.kiwix.kiwixcustomcustomexample   E  createKiwixServer: 
uuid = 11ed7bbb-bed2-ba2d-ff95-0390793ece1a 
filename = // it is empty since archive object is created by the fd list
allEntryCount = 252584
checksum = dd01d79d747655c301e510f6e5e3748b
filesize = 334794869
illustrationSizes = [J@32e212d
isMultiPart = false
mainEntry = org.kiwix.libzim.Entry@e8e0662
mediaCount = 297
metadataKeys = [Ljava.lang.String;@a36c3f3
allEntryCount = 252584
articleCount = 252152

After 5 second of starting the server

createdKiwixServer: After 5 second logbook url =  
book path = 
book allEntryCount = 252152
book creator = Berlin-Brandenburgische Akademie der Wissenschaften
book mediaCount = 297
book category = 
book date = 2024-08-23
book description = Der deutsche Wortschatz von 1600 bis heute
book flavour = 
book humanReadableIdFromPath = 
book id = 11ed7bbb-bed2-ba2d-ff95-0390793ece1a
book isPathValid = true
book publisher = Berlin-Brandenburgische Akademie der Wissenschaften
book name = Testversion
book tags = _ftindex:no;_pictures:yes;_videos:yes;_details:yes
book size = 334794752
book title = DWDS
book language = deu
book illustrations = [Lorg.kiwix.libkiwix.Illustration;@24dcb6a

screen-20241011-132720.mp4

[MohitMaliFtechiz]

Currently, we can not introduce the "Hotspot feature" for custom apps since we are using the fd list for custom apps, and currently, our Kiwix server is not showing ZIM files with fd on the server see kiwix/libkiwix#1015 and kiwix/libkiwix#1015 (comment).

[kelson42]

@MohitMaliFtechiz Where is the blocker exactly? The issue you have linked is closed.

[MohitMaliFtechiz]

@MohitMaliFtechiz Where is the blocker exactly?

@kelson42 The server is not showing the hosted file(which is built by the fd list), but it is showing the ZIM file language and other things as shown in the below image.

The server needs the library for hosting the books, and we are providing the book in the library see https://github.com/kiwix/kiwix-android/pull/4223/files#diff-793fea143643f1596a82cb9a68a09150ba1bbf124842495822985b05a7e8b438.

But when it is hosting the books on the server, IMO it again tries to create the Archive via the Book().getPath() method which is null in the fd list case. That's why it is not showing the ZIM files on the server, but other things of ZIM files are showing e.g. language, etc because they came from the library.

The issue you have linked is closed.

@kelson42 I do not have permission to reopen it, I have asked @mgautierfr to reopen it.