refactor: refactoring of code

Add graceful shutdown server

internal/middlewares/config.go

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2024 Jonas Kaninda
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package middlewares
+
+import (
+	"github.com/jkaninda/goma-gateway/pkg/logger"
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/amazon"
+	"golang.org/x/oauth2/facebook"
+	"golang.org/x/oauth2/github"
+	"golang.org/x/oauth2/gitlab"
+	"golang.org/x/oauth2/google"
+)
+
+func oauth2Config(oauth Oauth) *oauth2.Config {
+	config := &oauth2.Config{
+		ClientID:     oauth.ClientID,
+		ClientSecret: oauth.ClientSecret,
+		RedirectURL:  oauth.RedirectURL,
+		Scopes:       oauth.Scopes,
+		Endpoint: oauth2.Endpoint{
+			AuthURL:  oauth.Endpoint.AuthURL,
+			TokenURL: oauth.Endpoint.TokenURL,
+		},
+	}
+	switch oauth.Provider {
+	case "google":
+		config.Endpoint = google.Endpoint
+	case "amazon":
+		config.Endpoint = amazon.Endpoint
+	case "facebook":
+		config.Endpoint = facebook.Endpoint
+	case "github":
+		config.Endpoint = github.Endpoint
+	case "gitlab":
+		config.Endpoint = gitlab.Endpoint
+	default:
+		if oauth.Provider != "custom" {
+			logger.Error("Unknown provider: %s", oauth.Provider)
+		}
+
+	}
+	return config
+}