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fix(account): seed a fresh guest's interface language from the client locale

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A guest was provisioned with only its detected time zone; its PreferredLanguage
fell to the 'en' column default. The client already sends its locale in the guest
login (GuestLoginRequest.locale), but the gateway dropped it and ProvisionGuest
took no language — so a Russian user's brand-new native guest got English
language-dependent server content (the ad banner, bot messages) until the client's
later language reconcile. Read the locale in the gateway guest handler, thread it
through GuestAuth -> ProvisionGuest, and seed PreferredLanguage from it (validated;
an unsupported/absent value keeps the 'en' default). Wire field already present —
no schema change.
This commit is contained in:
Ilia Denisov
2026-07-15 00:06:23 +02:00
parent b5fe61279b
commit f8aeec8008
9 changed files with 48 additions and 19 deletions
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backend/internal/server/handlers_auth.go
+8 -4
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@@ -160,16 +160,20 @@ type guestAuthRequest struct {
// Subtype is the client-reported device family (ios/android/web) of this direct
// (web/native) session; there is no external signer, so it is recorded best-effort.
Subtype string `json:"subtype"`
// Language is the client's detected interface locale, seeding the fresh guest's
// interface language (best-effort; an unsupported/absent value keeps the 'en' default).
Language string `json:"language"`
}
// handleGuestAuth provisions a fresh ephemeral guest account and mints a session,
// seeding its time zone from the optional detected browser offset.
// seeding its time zone from the optional detected browser offset and its interface
// language from the optional detected locale.
func (s *Server) handleGuestAuth(c *gin.Context) {
// The body is optional: an absent or malformed one simply yields no time-zone seed
// (the account keeps the UTC default), so a bind error must not fail the bootstrap.
// The body is optional: an absent or malformed one simply yields no time-zone/language seed
// (the account keeps the UTC / 'en' defaults), so a bind error must not fail the bootstrap.
var req guestAuthRequest
_ = c.ShouldBindJSON(&req)
acc, err := s.accounts.ProvisionGuest(c.Request.Context(), req.BrowserTZ)
acc, err := s.accounts.ProvisionGuest(c.Request.Context(), req.BrowserTZ, req.Language)
if err != nil {
s.abortErr(c, err)
return