admin page updates

internal/contexts/keys.go

@@ -10,4 +10,5 @@ func (c Key) String() string {
 var (
 	DevModeKey         Key = Key("devmode")
 	PermissionCacheKey Key = Key("permissions")
+	PreviewRoleKey     Key = Key("preview-role")
 )

internal/contexts/preview_role.go

@@ -0,0 +1,25 @@
+package contexts
+
+import (
+	"context"
+
+	"git.haelnorr.com/h/oslstats/internal/db"
+)
+
+// WithPreviewRole adds a preview role to the context
+func WithPreviewRole(ctx context.Context, role *db.Role) context.Context {
+	return context.WithValue(ctx, PreviewRoleKey, role)
+}
+
+// GetPreviewRole retrieves the preview role from the context, or nil if not present
+func GetPreviewRole(ctx context.Context) *db.Role {
+	if role, ok := ctx.Value(PreviewRoleKey).(*db.Role); ok {
+		return role
+	}
+	return nil
+}
+
+// IsPreviewMode returns true if the user is currently in preview mode
+func IsPreviewMode(ctx context.Context) bool {
+	return GetPreviewRole(ctx) != nil
+}