feat: support acs email provider (#2323)

* feat: support acs email provider

* feat: support acs email provider

* hide Test SMTP Connection button

* fix name acs

email/provider.go

@@ -0,0 +1,27 @@
+// Copyright 2023 The Casdoor Authors. All Rights Reserved.
+//
+// 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 email
+
+type EmailProvider interface {
+	Send(fromAddress string, fromName, toAddress string, subject string, content string) error
+}
+
+func GetEmailProvider(typ string, clientId string, clientSecret string, appId string, host string, port int, disableSsl bool) EmailProvider {
+	if typ == "Azure ACS" {
+		return NewAzureACSEmailProvider(appId, host)
+	} else {
+		return NewSmtpEmailProvider(clientId, clientSecret, host, port, typ, disableSsl)
+	}
+}