feat: add gitlab provider templates (#5405)

* feat(api): add google provider template

* refactor reduce functions

* handle removed event

* linting

* fix projection

* feat(api): add generic oauth provider template

* feat(api): add github provider templates

* feat(api): add github provider templates

* fixes

* proto comment

* fix filtering

* requested changes

* feat(api): add generic oauth provider template

* remove wrongly committed message

* increase budget for angular build

* fix linting

* fixes

* fix merge

* fix merge

* fix projection

* fix merge

* updates from previous PRs

* enable github providers in login

* fix merge

* fix test and add github styling in login

* cleanup

* feat(api): add gitlab provider templates

* fix: merge

* fix display of providers in login

* implement gitlab in login and make prompt `select_account` optional since gitlab can't handle it

* fix merge

* fix merge and add tests for command side

* requested changes

* requested changes

* Update internal/query/idp_template.go

Co-authored-by: Silvan <silvan.reusser@gmail.com>

* fix merge

* requested changes

---------

Co-authored-by: Silvan <silvan.reusser@gmail.com>

internal/domain/idp.go

@@ -36,12 +36,22 @@ const (
 )
 
 func (t IDPType) GetCSSClass() string {
-	switch t { //nolint:exhaustive
+	switch t {
 	case IDPTypeGoogle:
 		return "google"
 	case IDPTypeGitHub,
 		IDPTypeGitHubEnterprise:
 		return "github"
+	case IDPTypeGitLab,
+		IDPTypeGitLabSelfHosted:
+		return "gitlab"
+	case IDPTypeUnspecified,
+		IDPTypeOIDC,
+		IDPTypeJWT,
+		IDPTypeOAuth,
+		IDPTypeLDAP,
+		IDPTypeAzureAD:
+		fallthrough
 	default:
 		return ""
 	}

internal/domain/policy_login.go

@@ -4,6 +4,8 @@ import (
 	"net/url"
 	"time"
 
+	"github.com/zitadel/logging"
+
 	"github.com/zitadel/zitadel/internal/eventstore/v1/models"
 )
 
@@ -65,6 +67,35 @@ func (p IDPProvider) IsValid() bool {
 	return p.IDPConfigID != ""
 }
 
+// DisplayName returns the name or a default
+// to be used when always a name must be displayed (e.g. login)
+func (p IDPProvider) DisplayName() string {
+	if p.Name != "" {
+		return p.Name
+	}
+	switch p.IDPType {
+	case IDPTypeGitHub:
+		return "GitHub"
+	case IDPTypeGitLab:
+		return "GitLab"
+	case IDPTypeGoogle:
+		return "Google"
+	case IDPTypeUnspecified,
+		IDPTypeOIDC,
+		IDPTypeJWT,
+		IDPTypeOAuth,
+		IDPTypeLDAP,
+		IDPTypeAzureAD,
+		IDPTypeGitHubEnterprise,
+		IDPTypeGitLabSelfHosted:
+		fallthrough
+	default:
+		// we should never get here, so log it
+		logging.Errorf("name of provider (type %d) is empty - id: %s", p.IDPType, p.IDPConfigID)
+		return ""
+	}
+}
+
 type PasswordlessType int32
 
 const (