feat: management && notify

service/notify/notify.go

@@ -0,0 +1,44 @@
+package notify
+
+import (
+	"encoding/json"
+	"nCovTrack-Backend/global"
+	"nCovTrack-Backend/models"
+	"strconv"
+)
+
+const (
+	NOTIFY_KEY       = "notification_"
+	NOTIFY_DEL_VALUE = "notify_del"
+)
+
+func InsertNotification(userId int, notification models.BackNotification) {
+	key := NOTIFY_KEY + strconv.Itoa(userId)
+	valueStr, _ := json.Marshal(notification)
+	global.Redis.RPush(key, valueStr)
+}
+
+func DeleteNotification(userId int, index int) {
+	key := NOTIFY_KEY + strconv.Itoa(userId)
+	pipe := global.Redis.TxPipeline()
+	pipe.LSet(key, int64(index), NOTIFY_DEL_VALUE)
+	pipe.LRem(key, 2, NOTIFY_DEL_VALUE)
+	pipe.Exec()
+}
+
+func QueryNotificationLen(userId int) int {
+	key := NOTIFY_KEY + strconv.Itoa(userId)
+	return int(global.Redis.LLen(key).Val())
+}
+
+func ListNotifycation(userId int, start, end int) []models.BackNotification {
+	key := NOTIFY_KEY + strconv.Itoa(userId)
+	var notifications []models.BackNotification
+	notificationStrArr := global.Redis.LRange(key, int64(start), int64(end)).Val()
+	for _, notificationStr := range notificationStrArr {
+		var notification models.BackNotification
+		json.Unmarshal([]byte(notificationStr), &notification)
+		notifications = append(notifications, notification)
+	}
+	return notifications
+}