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package main
import (
"fmt"
"time"
)
type Item struct {
Value any
ExpiresAt *time.Time
}
type RedisDB struct {
shards []*Shard
}
type SimpleString string
func serializeRESP(v any) []byte {
switch val := v.(type) {
case string:
bulkString := fmt.Sprintf("$%d\r\n%s\r\n", len(val), val)
return []byte(bulkString)
case int:
integerString := fmt.Sprintf(":%d\r\n",val)
return []byte(integerString)
case nil:
return []byte("$-1\r\n")
case error:
errorString := fmt.Sprintf("-ERR %s\r\n",val.Error())
return []byte(errorString)
case []string:
size := len(val)
result := []byte(fmt.Sprintf("*%d\r\n", size))
for i := 0; i < size; i++ {
result = append(result, serializeRESP(val[i])...)
}
return result
case map[string]string:
size := len(val)
result := []byte(fmt.Sprintf("*%d\r\n", size*2))
for key, value := range val {
result = append(result, serializeRESP(key)...)
result = append(result, serializeRESP(value)...)
}
return result
case SimpleString:
simpleStr := fmt.Sprintf("+%s\r\n", val)
return []byte(simpleStr)
default:
return []byte("-ERR internal server error: unknown type\r\n")
}
}
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