[vynulldev]

What & why

An import converts every track's key to Camelot ("8A") so the deck's KEY column shows one notation. A rekordbox smart rule on the key, though, carries the key name rekordbox showed, which in classic notation is "Am". After an import, "key is Am" therefore matched no track at all, and "key is not Am" matched every track.

The link-spec conformance suites didn't catch it, because the conformance server serves rekordbox's key names unconverted. It showed up on a CDJ-2000NXS2 with the synthetic test library, whose "Text: key is Am" playlist came up empty.

Server

• Equality (is, is not) compares keys: a recognised key name in either notation, including rekordbox's enharmonic spellings such as Abm, is the same key as its Camelot or classic counterpart.
• Contains, starts with and ends with test the track key's name in each notation, so "contains m" still finds minor keys stored as Camelot.
• Text that isn't a key name (or has surrounding spaces) still compares as text, as rekordbox does, so the conformance results are unchanged.

Web editor

• The key picker lists Camelot keys only. For an imported rule with a classic name, the browser selected the first key and the editor's sync wrote it into the rule, so just opening the playlist changed "Am" to "1A".
• The rule's own value is now kept as a selected option (shown with its Camelot name).
• The rule preview compares keys in either notation.
• The key field offers rekordbox's operators (equals, not equals, contains, does not contain, starts with, ends with), with Vynull's "is compatible with" kept last. Before, it offered only equals, is not, and is compatible with, so an imported contains or starts-with key rule showed the wrong operator.
• Equals, not equals and is compatible with keep a key dropdown, now labelled in both notations ("8A · Am", led by the key display setting). The text operators take a typed value instead, so "contains C" can find C, C# and Cb. rekordbox itself uses a text box for every key operator.
• "Is compatible with" now reads either notation on both sides.

rekordbox compares key text against the key names it stores, which follow its Key Display Format: a classic-notation rule such as "Ab" only matched with the format set to Classic or "Display key information on the database" ticked (checked by hand in rekordbox's Preferences, View panel). Vynull stores Camelot after an import, so it deliberately accepts a key named in either notation rather than depending on a display setting.

Tests cover equality, inequality, enharmonics, contains and does-not-contain, starts with, spacing, and non-key text. Conformance against rekordbox 7.2.19 is unchanged (the smart suites stay at 743 exact).

Hardware testing

• Tested on: CDJ-2000NXS2

Checklist

• go build ./..., go vet ./..., and go test ./... pass
• gofmt -l . is clean
• New source files carry an SPDX header (GPL-3.0-or-later)
• Tested on real hardware (deck + firmware noted above), or this change doesn't affect deck behaviour
• I agree my contribution is licensed under the project's GPLv3