[Feature Request] A way to migrate already downloaded manga

[qu1ck]

What feature should be added to Tachidesk?

Tachiyomi has this feature that is called "Invalidate downloads index" in advanced settings.
It allows the app to rescan what is in it's downloaded folder, match it with library entries and mark chapters as downloaded if files or cbz archives already exist on disk.

Why/Project's Benefit/Existing Problem

This allows migration from other similar apps without losing already downloaded data.

If there is a way to achieve this, even if it involves running sql statements on the db or calling an api endpoint manually, please let me know. I'm a dev and can handle some technical challenge but can't commit to full on learning kotlin and implementing the feature myself at the moment.

[dariusaurius]

Tachiyomi already has this feature added, would love to see it implemented in Tachidesk for backup and sync reasons ♥️

https://github.com/tachiyomiorg/tachiyomi/blob/00b2853d3daaa49a2b3bcada1596e094e8da5156/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadCache.kt#L305

[BlueNecko]

So true, it's a hassle moving manga's (50gb+) and relisting every manga in tachidesk as downloaded. It's a very usefull feature

[imnotadev-ineedhelp]

I am extremely shocked to see that this is not already a added. Now I have to manually download all the, all the manga. I have a library of 22GB. Also there is no option for "x" chapter to "y" chapter download :(

[Robonau]

there is no option for "x" chapter to "y" chapter download :(

bulk chapter download has been a thing since v0.6.6

[zuoez02]

Can we have this feature now? I have to migrate from mihon to suwayomi because it used more than 50GB in my phone.

[Bryan792]

i tried using my mihon cbz files, but suwayomi could not read them, did you have that issue too?

Can we have this feature now? I have to migrate from mihon to suwayomi because it used more than 50GB in my phone.

[Syer10]

Suwayomi works great with cbz files from Mihon, just make sure they are in the correct location.
It won't register them until you click the download icon, it will then check the download and if it's valid it will use it.
There has been improvements to this in the preview version, so if you are encountering weird behavior you should update to the preview, which you can find in the README.

[Bryan792]

Suwayomi works great with cbz files from Mihon, just make sure they are in the correct location. It won't register them until you click the download icon, it will then check the download and if it's valid it will use it. There has been improvements to this in the preview version, so if you are encountering weird behavior you should update to the preview, which you can find in the README.

I'm always getting this error whenever I try to use a cbz I copied over from mihon:

org.apache.commons.compress.archivers.zip.UnsupportedZipFeatureException: Unsupported feature data descriptor used in entry

[zuoez02]

Suwayomi works great with cbz files from Mihon, just make sure they are in the correct location. It won't register them until you click the download icon. It will then check the download and if it's valid it will use it. There have been improvements to this in the preview version, so if you are encountering weird behavior you should update to the preview, which you can find in the README.

I tried this way but it didn't work. It will redownload the manga.

I used deepwiki to analyze the Suwayomi-server and found that Suwayomi uses h2 database to save download information. I scanned the mihon download path and generated sqls to update the CHAPTER table data, and it works after restarting. :). This way is a little bit hacked.

[Robonau]

I tried this way but it didn't work. It will redownload the manga.

it will only re-download the chapter if the page count is different, due to mihon splitting long pages many webtoons will fail that check and re-download

the page check has been changed to be more lenient in server preview to account for that page splitting