withchao
1 year ago
parent
ca1b1a2d72
commit
ddf8f0d5cd
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// Copyright © 2023 OpenIM. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package mgo
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import (
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"context"
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"github.com/openimsdk/open-im-server/v3/pkg/common/storage/database"
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"github.com/openimsdk/open-im-server/v3/pkg/common/storage/model"
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"github.com/openimsdk/tools/errs"
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"go.mongodb.org/mongo-driver/bson"
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"go.mongodb.org/mongo-driver/mongo"
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"go.mongodb.org/mongo-driver/mongo/options"
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)
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// prefixes and suffixes.
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const (
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SubscriptionPrefix = "subscription_prefix"
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SubscribedPrefix = "subscribed_prefix"
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)
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// MaximumSubscription Maximum number of subscriptions.
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const (
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MaximumSubscription = 3000
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)
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func NewUserMongoDriver(database *mongo.Database) database.SubscribeUser {
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return &UserMongoDriver{
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userCollection: database.Collection(model.SubscribeUserTableName),
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}
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}
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type UserMongoDriver struct {
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userCollection *mongo.Collection
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}
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// AddSubscriptionList Subscriber's handling of thresholds.
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func (u *UserMongoDriver) AddSubscriptionList(ctx context.Context, userID string, userIDList []string) error {
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// Check the number of lists in the key.
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pipeline := mongo.Pipeline{
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{{"$match", bson.D{{"user_id", SubscriptionPrefix + userID}}}},
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{{"$project", bson.D{{"count", bson.D{{"$size", "$user_id_list"}}}}}},
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}
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// perform aggregate operations
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cursor, err := u.userCollection.Aggregate(ctx, pipeline)
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if err != nil {
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return errs.Wrap(err)
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}
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defer cursor.Close(ctx)
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var cnt struct {
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Count int `bson:"count"`
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}
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// iterate over aggregated results
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for cursor.Next(ctx) {
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err = cursor.Decode(&cnt)
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if err != nil {
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return errs.Wrap(err)
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}
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}
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var newUserIDList []string
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// If the threshold is exceeded, pop out the previous MaximumSubscription - len(userIDList) and insert it.
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if cnt.Count+len(userIDList) > MaximumSubscription {
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newUserIDList, err = u.GetAllSubscribeList(ctx, userID)
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if err != nil {
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return err
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}
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newUserIDList = newUserIDList[MaximumSubscription-len(userIDList):]
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_, err = u.userCollection.UpdateOne(
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ctx,
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bson.M{"user_id": SubscriptionPrefix + userID},
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bson.M{"$set": bson.M{"user_id_list": newUserIDList}},
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)
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if err != nil {
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return err
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}
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// Another way to subscribe to N before pop,Delete after testing
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/*for i := 1; i <= MaximumSubscription-len(userIDList); i++ {
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_, err := u.userCollection.UpdateOne(
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ctx,
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bson.M{"user_id": SubscriptionPrefix + userID},
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bson.M{SubscriptionPrefix + userID: bson.M{"$pop": -1}},
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)
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if err != nil {
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return err
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}
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}*/
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}
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upsert := true
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opts := &options.UpdateOptions{
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Upsert: &upsert,
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}
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_, err = u.userCollection.UpdateOne(
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ctx,
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bson.M{"user_id": SubscriptionPrefix + userID},
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bson.M{"$addToSet": bson.M{"user_id_list": bson.M{"$each": userIDList}}},
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opts,
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)
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if err != nil {
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return errs.Wrap(err)
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}
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for _, user := range userIDList {
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_, err = u.userCollection.UpdateOne(
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ctx,
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bson.M{"user_id": SubscribedPrefix + user},
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bson.M{"$addToSet": bson.M{"user_id_list": userID}},
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opts,
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)
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if err != nil {
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return errs.WrapMsg(err, "transaction failed")
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}
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}
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return nil
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}
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// UnsubscriptionList Handling of unsubscribe.
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func (u *UserMongoDriver) UnsubscriptionList(ctx context.Context, userID string, userIDList []string) error {
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_, err := u.userCollection.UpdateOne(
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ctx,
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bson.M{"user_id": SubscriptionPrefix + userID},
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bson.M{"$pull": bson.M{"user_id_list": bson.M{"$in": userIDList}}},
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)
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if err != nil {
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return errs.Wrap(err)
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}
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err = u.RemoveSubscribedListFromUser(ctx, userID, userIDList)
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if err != nil {
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return errs.Wrap(err)
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}
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return nil
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}
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// RemoveSubscribedListFromUser Among the unsubscribed users, delete the user from the subscribed list.
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func (u *UserMongoDriver) RemoveSubscribedListFromUser(ctx context.Context, userID string, userIDList []string) error {
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var err error
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for _, userIDTemp := range userIDList {
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_, err = u.userCollection.UpdateOne(
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ctx,
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bson.M{"user_id": SubscribedPrefix + userIDTemp},
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bson.M{"$pull": bson.M{"user_id_list": userID}},
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)
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}
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return errs.Wrap(err)
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}
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// GetAllSubscribeList Get all users subscribed by this user.
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func (u *UserMongoDriver) GetAllSubscribeList(ctx context.Context, userID string) (userIDList []string, err error) {
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var user model.SubscribeUser
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cursor := u.userCollection.FindOne(
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ctx,
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bson.M{"user_id": SubscriptionPrefix + userID})
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err = cursor.Decode(&user)
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if err != nil {
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if err == mongo.ErrNoDocuments {
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return []string{}, nil
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} else {
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return nil, errs.Wrap(err)
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}
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}
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return user.UserIDList, nil
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}
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// GetSubscribedList Get the user subscribed by those users.
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func (u *UserMongoDriver) GetSubscribedList(ctx context.Context, userID string) (userIDList []string, err error) {
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var user model.SubscribeUser
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cursor := u.userCollection.FindOne(
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ctx,
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bson.M{"user_id": SubscribedPrefix + userID})
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err = cursor.Decode(&user)
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if err != nil {
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if err == mongo.ErrNoDocuments {
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return []string{}, nil
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} else {
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return nil, errs.Wrap(err)
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}
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}
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return user.UserIDList, nil
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}
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@ -1,31 +0,0 @@
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// Copyright © 2023 OpenIM. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package database
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import "context"
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// SubscribeUser Operation interface of user mongodb.
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type SubscribeUser interface {
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// AddSubscriptionList Subscriber's handling of thresholds.
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AddSubscriptionList(ctx context.Context, userID string, userIDList []string) error
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// UnsubscriptionList Handling of unsubscribe.
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UnsubscriptionList(ctx context.Context, userID string, userIDList []string) error
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// RemoveSubscribedListFromUser Among the unsubscribed users, delete the user from the subscribed list.
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RemoveSubscribedListFromUser(ctx context.Context, userID string, userIDList []string) error
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// GetAllSubscribeList Get all users subscribed by this user
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GetAllSubscribeList(ctx context.Context, id string) (userIDList []string, err error)
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// GetSubscribedList Get the user subscribed by those users
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GetSubscribedList(ctx context.Context, id string) (userIDList []string, err error)
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}
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