Resolving code conflicts after project directory changes and Add user subscription to the operation from rpc to db layer (#684)

* Resolving code conflicts after project directory changes and Add subscribe and unsubscribe mongodb operations

* Organize and update module dependencies

pkg/common/db/table/unrelation/user.go

@@ -0,0 +1,42 @@
+// Copyright © 2023 OpenIM. 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 unrelation
+
+import "context"
+
+// SubscribeUser collection constant.
+const (
+	SubscribeUser = "subscribe_user"
+)
+
+// UserModel collection structure.
+type UserModel struct {
+	UserID     string   `bson:"user_id"       json:"userID"`
+	UserIDList []string `bson:"user_id_list" json:"userIDList"`
+}
+
+func (UserModel) TableName() string {
+	return SubscribeUser
+}
+
+// UserModelInterface Operation interface of user mongodb.
+type UserModelInterface interface {
+	// AddSubscriptionList Subscriber's handling of thresholds.
+	AddSubscriptionList(ctx context.Context, userID string, userIDList []string) error
+	// UnsubscriptionList Handling of unsubscribe.
+	UnsubscriptionList(ctx context.Context, userID string, userIDList []string) error
+	// RemoveSubscribedListFromUser Among the unsubscribed users, delete the user from the subscribed list.
+	RemoveSubscribedListFromUser(ctx context.Context, userID string, userIDList []string) error
+}