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storage.go
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storage.go
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package main
import (
"encoding/json"
"fmt"
"os"
"github.com/go-redis/redis"
)
type dbClient struct {
redisClient *redis.Client
}
func getDBClient() *dbClient {
addr := getRedisAddr()
logger.Println("connecting to resdis at", addr)
client := redis.NewClient(&redis.Options{
Addr: addr,
Password: "",
DB: 0,
})
return &dbClient{redisClient: client}
}
func getRedisAddr() string {
host := os.Getenv("REDIS_HOST")
port := os.Getenv("REDIS_PORT")
if host == "" {
host = "localhost"
}
if port == "" {
port = "6379"
}
return fmt.Sprintf("%s:%s", host, port)
}
func (c *dbClient) isReady() bool {
pong, err := c.redisClient.Ping().Result()
if err != nil {
return false
}
return pong == "PONG"
}
func (c *dbClient) createUser(user User) error {
sadd := c.redisClient.SAdd("users", user.UUID)
if err := sadd.Err(); err != nil {
logger.Println(err)
return err
}
umap, err := userToMap(user)
if err != nil {
return err
}
hmset := c.redisClient.HMSet(fmt.Sprintf("users:%s", user.UUID), umap)
if err := hmset.Err(); err != nil {
logger.Println(err)
return err
}
return nil
}
func (c *dbClient) updateUser(user User) error {
umap, err := userToMap(user)
if err != nil {
logger.Println(err)
return err
}
hmset := c.redisClient.HMSet(fmt.Sprintf("users:%s", user.UUID), umap)
if err := hmset.Err(); err != nil {
logger.Println(err)
return err
}
return nil
}
func (c *dbClient) deleteUser(uuid string) error {
srem := c.redisClient.SRem("users", uuid)
if err := srem.Err(); err != nil {
logger.Println(err)
return err
}
del := c.redisClient.Del(fmt.Sprintf("users:%s", uuid))
if err := del.Err(); err != nil {
logger.Println(err)
return err
}
return nil
}
func userToMap(user User) (map[string]interface{}, error) {
umap := make(map[string]interface{})
bytes, err := json.Marshal(user)
if err != nil {
logger.Println(err)
return nil, err
}
if err := json.Unmarshal(bytes, &umap); err != nil {
logger.Println(err)
return nil, err
}
return umap, nil
}