ReaderControls#useUpdateCurrentPageIndex:
On a page change the chapter update needs to be always queued since the deletion of downloaded chapters while reading logic is in the "ReaderService#updateChapter" function.
Thus, when the update is prevented here, this logic would never get triggered.
ReaderService#useUpdateChapter:
In case the read status or lastPageRead of a chapter did not change, the update was not triggered.
However, there might still be chapter downloads that need to be de deleted, which was never handled in such a case.
To be able to properly prevent unnecessary chapter updates, the ongoing updates have to finish, so that the apollo cache is update to date.
Otherwise, the update guard will always be false since the apollo caches chapter data is still from before the previous updates were triggered.
- open from outside reader
- is read
- yes: 1st page
- no : last read page
- inside reader via
- chapter selection: first page
- previous chapter : last page
- next chapter : first page
