Code documentation

internal/platform/session/session.go

@@ -1,3 +1,35 @@
+// Package session
+// Path: /internal/platform/session
+// File: session.go
+//
+// Purpose
+//   Initialize and configure the SCS (Server-Side Sessions) session manager
+//   based on application configuration. Controls session lifetime, idle timeout,
+//   cookie policy, and security posture.
+//
+// Responsibilities (as implemented here)
+//   1) Create SCS session manager used globally via bootstrap.
+//   2) Parse session lifetime + idle timeout from configuration.
+//   3) Apply secure cookie settings (HttpOnly, SameSite, Secure if production).
+//   4) Provide sensible defaults if configuration is invalid.
+//
+// Design notes
+//   - SCS stores session data server-side (DB, file, mem, etc. — backend not set here).
+//   - Cookie lifespan is enforced server-side (not just client expiry).
+//   - Secure flag toggled via cfg.HttpServer.ProductionMode.
+//   - Defaults keep application functional even if config is incomplete.
+//
+// TODOs (observations from current implementation)
+//   - Add structured validation + error logging for invalid duration strings.
+//   - Move secure cookie flag to config for more granular environment control.
+//   - Consider enabling:
+//       • Cookie.Persist (for "keep me logged in" flows)
+//       • Cookie.SameSite = StrictMode by default
+//   - Potentially expose SCS store configuration here (DB-backed sessions).
+//
+// Change log
+//   [2025-10-29] Documentation aligned with final session architecture.
+
 package session
 
 import (
@@ -9,6 +41,8 @@ import (
 	"github.com/alexedwards/scs/v2"
 )
 
+// New constructs a new SCS SessionManager using values from Config,
+// falling back to secure defaults if configuration is missing/invalid.
 func New(cfg config.Config) *scs.SessionManager {
 	s := scs.New()