AuthN: Add post auth hook for oauth token refresh (#61608)

* AuthN: rename package to sync

* AuthN: rename sync files

* Ouath: Add mock for OauthTokenService

* AuthN: Implement access token refresh hook

* AuthN: remove feature check from hook

* AuthN: register post auth hook for oauth token refresh

pkg/services/oauthtoken/oauthtokentest/mock.go

@@ -0,0 +1,53 @@
+package oauthtokentest
+
+import (
+	"context"
+
+	"github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/services/datasources"
+	"github.com/grafana/grafana/pkg/services/user"
+	"golang.org/x/oauth2"
+)
+
+type MockOauthTokenService struct {
+	GetCurrentOauthTokenFunc   func(ctx context.Context, usr *user.SignedInUser) *oauth2.Token
+	IsOAuthPassThruEnabledFunc func(ds *datasources.DataSource) bool
+	HasOAuthEntryFunc          func(ctx context.Context, usr *user.SignedInUser) (*models.UserAuth, bool, error)
+	InvalidateOAuthTokensFunc  func(ctx context.Context, usr *models.UserAuth) error
+	TryTokenRefreshFunc        func(ctx context.Context, usr *models.UserAuth) error
+}
+
+func (m *MockOauthTokenService) GetCurrentOAuthToken(ctx context.Context, usr *user.SignedInUser) *oauth2.Token {
+	if m.GetCurrentOauthTokenFunc != nil {
+		return m.GetCurrentOauthTokenFunc(ctx, usr)
+	}
+	return nil
+}
+
+func (m *MockOauthTokenService) IsOAuthPassThruEnabled(ds *datasources.DataSource) bool {
+	if m.IsOAuthPassThruEnabledFunc != nil {
+		return m.IsOAuthPassThruEnabledFunc(ds)
+	}
+	return false
+}
+
+func (m *MockOauthTokenService) HasOAuthEntry(ctx context.Context, usr *user.SignedInUser) (*models.UserAuth, bool, error) {
+	if m.HasOAuthEntryFunc != nil {
+		return m.HasOAuthEntryFunc(ctx, usr)
+	}
+	return nil, false, nil
+}
+
+func (m *MockOauthTokenService) InvalidateOAuthTokens(ctx context.Context, usr *models.UserAuth) error {
+	if m.InvalidateOAuthTokensFunc != nil {
+		return m.InvalidateOAuthTokensFunc(ctx, usr)
+	}
+	return nil
+}
+
+func (m *MockOauthTokenService) TryTokenRefresh(ctx context.Context, usr *models.UserAuth) error {
+	if m.TryTokenRefreshFunc != nil {
+		return m.TryTokenRefreshFunc(ctx, usr)
+	}
+	return nil
+}