New: Implement Logout

(coscine/issues#629)

src/STS/Controllers/AccountController.cs

@@ -4,6 +4,7 @@ using System.Threading.Tasks;
 using Coscine.STS.Utils;
 using Coscine.STS.Data;
 using Microsoft.AspNetCore.Identity;
+using System;
 
 namespace Coscine.STS.Controllers
 {
@@ -21,6 +22,9 @@ namespace Coscine.STS.Controllers
         {
             ViewBag.ReturnUrl = UrlGenerator.ExtendReturnUrl(returnUrl, Request);
             ViewBag.ORCiDUrl = ORCiDHandler.GetORCiDOAuthUrl() + UrlGenerator.ORCiDRedirectUrl();
+            ViewBag.IdpUrl = new Uri(
+                    Program.Configuration.GetStringAndWait("coscine/global/shibboleth/metadata")
+                ).GetLeftPart(System.UriPartial.Authority);
             System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
             ViewBag.AppJs = enc.GetString(Program.Configuration.GetAndWait("coscine/apps/login/appjs"));
             return View();
@@ -48,5 +52,27 @@ namespace Coscine.STS.Controllers
             ModelState.AddModelError("", "The userid provided is incorrect.");
             return View(model);
         }
+        
+        [Route("[controller]/logout")]
+        public async Task<ActionResult> Logout()
+        {
+            var externalLoginInfo = await _signInManager.GetExternalLoginInfoAsync();
+            var loggedInWithShibboleth = (externalLoginInfo != null && externalLoginInfo.LoginProvider == "Saml2");
+
+            await _signInManager.SignOutAsync();
+
+            foreach (var cookie in Request.Cookies.Keys)
+            {
+                Response.Cookies.Delete(cookie);
+            }
+
+            ViewBag.LoginUrl = UrlGenerator.GetLoginUrl(Request) + "&logout=true";
+            if (loggedInWithShibboleth)
+            {
+                ViewBag.LoginUrl += "&loggedInWithShibboleth=true";
+            }
+
+            return View();
+        }
     }
 }