feat(zapscript): keep ZapLink decks from any host and trust links the account vouches for - #1498
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📝 WalkthroughWalkthroughThe PR changes ZapLink deck handling. Served playlists from any host can become bounded, read-only fetched decks with minted IDs. Owned links remain served and trusted when credentialed. Playlist refreshes now use explicit deck identity. ChangesFetched deck persistence and parsing
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant Client
participant ZapLinkService
participant DeckService
participant UserDB
Client->>ZapLinkService: fetch ZapLink
ZapLinkService-->>Client: served playlist and ownership result
Client->>DeckService: parse and adopt unowned playlist
DeckService->>UserDB: upsert fetched deck
UserDB-->>DeckService: minted deck ID
DeckService-->>Client: rewritten deck URI
Merge Risk: 🟡 Moderate · up to Redirected ZapLink content can incorrectly run as account-owned and trusted. Redirects must be prevented from supplying ownership vouches before merge. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 56.52% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 69 functions across 22 files. (2 skipped: 2 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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…s own - A link service may answer a credentialed request with a header saying the linked account owns the card or deck the link names. The answer is honoured only from a host this device sent its own credential to, and absent means not owned. - A link body the account vouched for runs trusted, like a card the user wrote; any other link body runs untrusted, as before. A cached copy of a deck opened through such a link runs trusted for that open without becoming an owned, synced deck.
- A ZapLink body that is a single playlist.open, playlist.play or playlist.load command carrying a JSON playlist is kept as a read-only deck, whichever host serves it and whatever the link or the playlist ID look like. The copy is known by the link it was fetched from and gets a deck ID minted on this device, so nothing a source serves can name, replace or stand in for a deck the user owns. This replaces recognising a deck by an official host list, a "d<id>" path and a "ZON-" playlist prefix, which tied the feature to one service and never matched a real link. - A deck made on the device opens as playlist ID deck://<id>; a deck kept from a link opens as the id its playlist was served with. An open deck's in-place refresh matches the deck the playlist was opened from, never the playlist ID, which any served playlist may choose freely. - At most 200 decks are kept from links; the one fetched longest ago makes room and its tags are cleared. - The owned answer is honoured only from the host that answered and was sent the credential, so a redirect to another host cannot vouch, and it never restores trust to a token that was already untrusted. A link the account vouches for runs trusted as served and is not kept as a copy. - The refresh-on-open gate read the wrong result of GetZapLinkHost and passed hosts recorded as not serving ZapScript.
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Inline comments:
In `@pkg/zapscript/zaplinks.go`:
- Around line 364-368: Update checkZapLinkRedirect so it tracks whether any
redirect occurred and forces owned to false whenever the response followed a
redirect, even if the final host is credentialed and X-Zaparoo-Owned is set.
Preserve accepting and returning the redirected response body while preventing
RunCommand from treating it as trusted.
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📒 Files selected for processing (25)
docs/api/methods.mdpkg/database/database.gopkg/database/decks.gopkg/database/userdb/decks.gopkg/database/userdb/decks_test.gopkg/database/userdb/migrations/20260919120000_deck_playlist_id.sqlpkg/database/userdb/sql.gopkg/database/userdb/userdb.gopkg/service/decks/playlist.gopkg/service/decks/playlist_fuzz_test.gopkg/service/decks/playlist_test.gopkg/service/decks/testdata/fuzz/FuzzParseDeckPlaylist/2d5fb789b19201edpkg/service/playlist_refresh.gopkg/service/playlist_refresh_test.gopkg/service/playlists/playlists.gopkg/service/queues.gopkg/service/queues_playlist_test.gopkg/testing/helpers/db_mocks.gopkg/zapscript/commands.gopkg/zapscript/commands_test.gopkg/zapscript/playlist_deck.gopkg/zapscript/playlist_deck_test.gopkg/zapscript/virtual_launchables_test.gopkg/zapscript/zaplinks.gopkg/zapscript/zaplinks_test.go
💤 Files with no reviewable changes (1)
- pkg/service/decks/testdata/fuzz/FuzzParseDeckPlaylist/2d5fb789b19201ed
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- The credential is attached per hop, so a link on any host could redirect to a host this device is linked to and borrow its honest vouch for a card the tapped link never named. The owned answer now counts only when no redirect was followed; a redirected body is still served, untrusted.
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playlist.open,playlist.playorplaylist.load) carrying a JSON playlist is kept as a read-only deck, whichever host serves it and whatever the link or the playlist ID look like. The copy is known by its link and gets a deck ID minted on the device, so nothing a source serves can name, replace or stand in for a deck the user owns. This replaces feat(decks): open decks as playlists and keep ZapLink decks locally #1490's recognition by official host,d<id>path andZON-prefix, which tied the feature to one service and never matched a real link.deck://<id>; a kept deck opens as theidit was served with. An open deck's in-place refresh matches the deck it was opened from, not the playlist ID. At most 200 decks are kept from links; the one fetched longest ago makes room.X-Zaparoo-Owned: 1. Core honours it only from the host that answered and was sent the credential, so a redirect cannot vouch, and never to restore trust to a token that was already untrusted. A link the account vouches for runs trusted as served and is not kept as a copy.Summary by CodeRabbit