PLT-2862 Re-added LDAP login boxes as part of signup flow (#2937)

* Added ldap_only parameter for login API

* Re-added LDAP login boxes as part of signup flow

api/user.go

@@ -436,6 +436,7 @@ func login(c *Context, w http.ResponseWriter, r *http.Request) {
 	password := props["password"]
 	mfaToken := props["token"]
 	deviceId := props["device_id"]
+	ldapOnly := props["ldap_only"] == "true"
 
 	if len(password) == 0 {
 		c.Err = model.NewLocAppError("login", "api.user.login.blank_pwd.app_error", nil, "")
@@ -460,7 +461,7 @@ func login(c *Context, w http.ResponseWriter, r *http.Request) {
 	} else {
 		c.LogAudit("attempt")
 
-		if user, err = getUserForLogin(loginId); err != nil {
+		if user, err = getUserForLogin(loginId, ldapOnly); err != nil {
 			c.LogAudit("failure")
 			c.Err = err
 			return
@@ -485,13 +486,13 @@ func login(c *Context, w http.ResponseWriter, r *http.Request) {
 	w.Write([]byte(user.ToJson()))
 }
 
-func getUserForLogin(loginId string) (*model.User, *model.AppError) {
+func getUserForLogin(loginId string, onlyLdap bool) (*model.User, *model.AppError) {
 	ldapAvailable := *utils.Cfg.LdapSettings.Enable && einterfaces.GetLdapInterface() != nil
 
 	if result := <-Srv.Store.User().GetForLogin(
 		loginId,
-		*utils.Cfg.EmailSettings.EnableSignInWithUsername,
-		*utils.Cfg.EmailSettings.EnableSignInWithEmail,
+		*utils.Cfg.EmailSettings.EnableSignInWithUsername && !onlyLdap,
+		*utils.Cfg.EmailSettings.EnableSignInWithEmail && !onlyLdap,
 		ldapAvailable,
 	); result.Err != nil {
 

api/user_test.go

@@ -204,6 +204,23 @@ func TestLogin(t *testing.T) {
 	}
 }
 
+func TestLoginByLdap(t *testing.T) {
+	th := Setup()
+	Client := th.CreateClient()
+
+	team := model.Team{DisplayName: "Name", Name: "z-z-" + model.NewId() + "a", Email: "test@nowhere.com", Type: model.TEAM_OPEN}
+	rteam, _ := Client.CreateTeam(&team)
+
+	user := model.User{Email: strings.ToLower(model.NewId()) + "success+test@simulator.amazonses.com", Nickname: "Corey Hulen", Username: "corey" + model.NewId(), Password: "pwd"}
+	ruser, _ := Client.CreateUser(&user, "")
+	LinkUserToTeam(ruser.Data.(*model.User), rteam.Data.(*model.Team))
+	store.Must(Srv.Store.User().VerifyEmail(ruser.Data.(*model.User).Id))
+
+	if _, err := Client.LoginByLdap(ruser.Data.(*model.User).Id, user.Password); err == nil {
+		t.Fatal("should've failed to log in with non-ldap user")
+	}
+}
+
 func TestLoginWithDeviceId(t *testing.T) {
 	th := Setup().InitBasic()
 	Client := th.BasicClient