Follow-up from PR #12 (refactor: replace magic session numbers with sessionType), which introduced the sessionCategory enum in handlers/common/session_store.go. The refactor is a strict improvement; these are non-blocking hardening items for when a fourth session category is eventually added.
1. Non-exhaustive switch handling (most meaningful)
Four switches over sessionType disagree on how they treat an unrecognized category:
validateSession — default: return false (fail-closed, good)setSession — no default; unknown category stores the entry with no timestampsestimateMemoryUsage — no default; unknown category contributes 0 (cosmetic)ExpireSession — no default; unknown category leaves timeout == 0, so the session is not expired despite the helper's name
None are reachable today (the public API only ever supplies valid constants), but adding a fourth category would let several switches silently do the wrong thing. Options: add the exhaustive golangci-lint analyzer, or add explicit default: arms to the three switches that lack one (panicking or choosing a safe value in ExpireSession).
2. Document the iota zero-value assumption
disambiguation == 0 means a zero-valued SessionEntry is implicitly disambiguation. This is safe only because sessions are in-memory and always explicitly constructed (never deserialized). A one-line comment on the const block would protect a future maintainer who adds persistence.
3. Minor: String() fallback + dead code
String() is currently unused; it's reasonable forward-looking logging/test infrastructure, just noting it.- Consider
fmt.Sprintf("sessionCategory(%d)", int(s)) instead of "unknown" so an unexpected value is diagnosable.
Follow-up from PR #12 (
refactor: replace magic session numbers with sessionType), which introduced thesessionCategoryenum inhandlers/common/session_store.go. The refactor is a strict improvement; these are non-blocking hardening items for when a fourth session category is eventually added.1. Non-exhaustive switch handling (most meaningful)
Four switches over
sessionTypedisagree on how they treat an unrecognized category:validateSession—default: return false(fail-closed, good)setSession— nodefault; unknown category stores the entry with no timestampsestimateMemoryUsage— nodefault; unknown category contributes 0 (cosmetic)ExpireSession— nodefault; unknown category leavestimeout == 0, so the session is not expired despite the helper's nameNone are reachable today (the public API only ever supplies valid constants), but adding a fourth category would let several switches silently do the wrong thing. Options: add the
exhaustivegolangci-lint analyzer, or add explicitdefault:arms to the three switches that lack one (panicking or choosing a safe value inExpireSession).2. Document the iota zero-value assumption
disambiguation == 0means a zero-valuedSessionEntryis implicitlydisambiguation. This is safe only because sessions are in-memory and always explicitly constructed (never deserialized). A one-line comment on theconstblock would protect a future maintainer who adds persistence.3. Minor:
String()fallback + dead codeString()is currently unused; it's reasonable forward-looking logging/test infrastructure, just noting it.fmt.Sprintf("sessionCategory(%d)", int(s))instead of"unknown"so an unexpected value is diagnosable.