enh/y indexeddb

[max-nextcloud]

• wip: try y-indexeddb
• chore(split) useIndexedDbProvider from Editor.vue
• fix(cron): do not reset document
• enh(yjs): store baseVersionEtag alongside doc
• Fixes: Persist document state in browser IndexedDB storage #7415

TODOs

• Think through other file operations.
• Typing without network, closing the editor, opening it again: no content lost
• After closing and opening the editor, undo history is empty
• cleanup yDoc file server-side when file is deleted @mejo-
• Add base_version_etag as custom property to IndexedDB
  • After loading document from IndexedDB, send baseVersionEtag as part of create request
  • In case of conflict, use existing manual conflict handling
  • After manual conflict handling, reset y-indexeddb provider for document
  • Fix endless reload loop when base version has been cleared:
    • Open file with version in indexed db but on a different baseVersionEtag.
    • Different versions are detected. Reload button is offered.
    • Reload does not change the indexed db content - so conflict persists.
  • migrate change mime type test to playwright
  • debug failing change mime type test.
  • make bc channel depend on base version etag.
  • Test... start editing offline, overwrite file in other tab, see what happens when getting back online @max-nextcloud
• Handling conflicts when opening file that was changed offline
  • detect conflict
  • handle scenario with no local changes well
  • display conflict when local changes were made
  • adjust conflict dialog wording
  • test conflict resolutions work
• Reconnecting: saved unsaved changes:
  • indicate dirty state
  • autosave when opening dirty file
  • autosave when reconnecting with editing session open
  • push steps that have not been pushed yet
• make "no conflict when uploading identical content" work again (@mejo-)
• cleanup client side state for deleted files (possibly a follow-up)
• improve wording for conflict resolution buttons (@silverkszlo, possibly a follow-up if too complex)
  • check if the distinction in readerSource property for CollissionResolveDialog is still needed (see here)
• test in private browser tab and research whether indexeddb is supported there (@silverkszlo)
• keep editor editable when connection issue got detected (@mejo-)

[codecov]

Codecov Report

❌ Patch coverage is 57.35294% with 29 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/services/WebSocketPolyfill.ts	30.76%	9 Missing ⚠️
src/services/SyncService.ts	11.11%	7 Missing and 1 partial ⚠️
src/helpers/yjs.ts	0.00%	3 Missing and 1 partial ⚠️
src/composables/useConnection.ts	62.50%	2 Missing and 1 partial ⚠️
src/helpers/updateFromContent.ts	85.71%	2 Missing ⚠️
src/services/y-websocket.js	0.00%	2 Missing ⚠️
src/EditorFactory.ts	85.71%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[mejo-]

• cleanup yDoc file server-side when file is deleted @mejo-

Turns out this already happens and we don't have to change anything:

text/lib/Listeners/BeforeNodeDeletedListener.php

Line 42 in ce8ca64

$this->documentService->resetDocument($node->getId(), true);