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[accounts] mirror regex from old client for display name

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Devin Zuczek
2026-10-13 15:50:52 -04:00
parent 5ba57210b9
commit 4f36146912
5 changed files with 75 additions and 23 deletions
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apps/api/src/sanitize.ts
+7 -5
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@@ -75,11 +75,13 @@ const NAME_WORD_BOUNDARIES: Array<[RegExp, string]> = [
/**
* Whether `value`, read as a NAME, contains a swear.
*
* A username or display name is letters and digits only (`nameRejection`), so it carries
* no spaces — and the filter matches whole words. Handing one to {@link containsSwears}
* as-is therefore only refuses a name that IS a swear and nothing else: `Fucker123` and
* `ShitLord` sail through. So the name is split at the boundaries a player types instead
* of a space, and the pieces are checked as words.
* A username is letters and digits only (`nameRejection`), so it carries no spaces — and
* the filter matches whole words. Handing one to {@link containsSwears} as-is therefore
* only refuses a name that IS a swear and nothing else: `Fucker123` and `ShitLord` sail
* through. So the name is split at the boundaries a player types instead of a space, and
* the pieces are checked as words. A display name may carry real spaces and punctuation
* (`displayNameRejection`), which the filter already breaks words at; the split still
* applies to the runs in between.
*
* That keeps the library's trade-off rather than reaching for substring matching, which
* is the tempting fix and the wrong one: `Scunthorpe`, `assassin`, `Classic`,