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get_message.go
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/
get_message.go
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package service
import (
"context"
"github.com/benxinm/tiktok/cmd/chat/dal/cache"
"github.com/benxinm/tiktok/cmd/chat/dal/db"
"github.com/benxinm/tiktok/cmd/chat/dal/mq"
"github.com/benxinm/tiktok/kitex_gen/chat"
"github.com/bytedance/sonic"
"github.com/cloudwego/kitex/pkg/klog"
"golang.org/x/sync/errgroup"
"sort"
"strconv"
"time"
)
func (c *ChatService) GetMessages(req *chat.MessageListRequest, user_id int64) ([]*db.Message, error) {
mq.Mu.Lock()
defer mq.Mu.Unlock()
messageList := make(db.MessageArray, 0)
key := strconv.FormatInt(req.ToUserId, 10) + "-" + strconv.FormatInt(user_id, 10)
revkey := strconv.FormatInt(user_id, 10) + "-" + strconv.FormatInt(req.ToUserId, 10)
no_empty := 0
msg_array, err := cacheMessageDeal(c.ctx, key, revkey, &no_empty, user_id)
if err != nil {
klog.Error(err)
return nil, err
}
messageList = append(messageList, msg_array...)
rev_msg_array, err := cacheMessageDeal(c.ctx, revkey, key, &no_empty, user_id)
if err != nil {
klog.Error(err)
return nil, err
}
messageList = append(messageList, rev_msg_array...)
if len(messageList) > 0 {
sort.Sort(messageList)
return messageList, nil
} else if no_empty > 0 {
return nil, nil
}
messages, err := db.GetMessageList(c.ctx, req.ToUserId, user_id)
if err != nil {
klog.Error(err)
return nil, err
}
mq_message, err := sonic.Marshal(messages)
if err != nil {
klog.Error(err)
return nil, err
}
message := make([]*mq.MiddleMessage, 0)
err = sonic.Unmarshal(mq_message, &message)
if err != nil {
klog.Error(err)
return nil, err
}
for _, val := range message {
val.IsReadNum = append(val.IsReadNum, user_id)
mes, _ := sonic.Marshal(val)
key := strconv.FormatInt(val.FromUserId, 10) + "-" + strconv.FormatInt(val.ToUserId, 10)
cre_time, _ := time.ParseInLocation(time.RFC3339, val.CreatedAt, time.Local)
err := cache.CreateMessage(c.ctx, key, revkey, cre_time.UnixMilli(), string(mes))
if err != nil {
klog.Info(err)
continue
}
}
return messages, nil
}
func cacheMessageDeal(ctx context.Context, key string, revkey string, isempty *int, user_id int64) (db.MessageArray, error) {
msg_array := make(db.MessageArray, 0)
if ok := cache.MessageExist(ctx, key); ok != 0 {
// 查询 a->b的消息
mem, err := cache.GetMessage(ctx, key)
if err != nil {
klog.Error(err)
return nil, err
}
if len(mem) != 0 {
*isempty = 1
}
var eg errgroup.Group
for _, val := range mem {
temp_val := val
eg.Go(func() error {
tempMessage := new(db.MiddleMessage)
message := new(db.Message)
err = sonic.Unmarshal([]byte(temp_val), &tempMessage)
if err != nil {
klog.Error(err)
return err
}
for _, id := range tempMessage.IsReadNum {
if id == 0 {
continue
} else if id == user_id {
return nil
}
}
err = db.Convert(message, tempMessage)
if err != nil {
klog.Error(err)
return err
}
tempMessage.IsReadNum = append(tempMessage.IsReadNum, user_id)
redis_msg, err := sonic.Marshal(tempMessage)
if err != nil {
klog.Error(err)
return err
}
cTime, err := time.ParseInLocation(time.RFC3339, tempMessage.CreatedAt, time.Local)
if err != nil {
klog.Error(err)
return err
}
err = cache.CreateMessage(ctx, key, revkey, cTime.UnixMilli(), string(redis_msg))
if err != nil {
klog.Error(err)
return err
}
msg_array = append(msg_array, message)
return nil
})
}
if err := eg.Wait(); err != nil {
return nil, err
}
}
return msg_array, nil
}