Add SAML support

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/server/auth/sign_out_handler.go

@@ -0,0 +1,59 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package auth
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/getprobo/probo/pkg/gid"
+	"github.com/getprobo/probo/pkg/securecookie"
+	authsvc "github.com/getprobo/probo/pkg/auth"
+	"go.gearno.de/kit/httpserver"
+)
+
+func SignOutHandler(authSvc *authsvc.Service, authCfg RoutesConfig) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+
+		sessionID, err := securecookie.Get(r, securecookie.DefaultConfig(
+			authCfg.CookieName,
+			authCfg.CookieSecret,
+		))
+		if err != nil {
+			httpserver.RenderError(w, http.StatusBadRequest, err)
+			return
+		}
+
+		gid, err := gid.ParseGID(sessionID)
+		if err != nil {
+			httpserver.RenderError(w, http.StatusBadRequest, err)
+			return
+		}
+
+		err = authSvc.SignOut(r.Context(), gid)
+		if err != nil {
+			panic(fmt.Errorf("cannot sign out: %w", err))
+		}
+
+		securecookie.Clear(w, securecookie.DefaultConfig(
+			authCfg.CookieName,
+			authCfg.CookieSecret,
+		))
+
+		w.Header().Set("Clear-Site-Data", "*")
+
+		httpserver.RenderJSON(w, http.StatusOK, map[string]bool{"success": true})
+	}
+}