dstpierre/gosaas

package model

import (
    "fmt"
    "log"
    "strconv"
    "strings"
    "time"

    uuid "github.com/satori/go.uuid"
)

// NewToken returns a token combining an id with a unique identifier.
func NewToken(id int64) string {
    return fmt.Sprintf("%d|%s", id, uuid.NewV4().String())
}

// ParseToken returns the id and uuid for a given token.
func ParseToken(token string) (int64, string) {
    pairs := strings.Split(token, "|")
    if len(pairs) != 2 {
        return -1, ""
    }

    id, err := strconv.ParseInt(pairs[0], 10, 64)
    if err != nil {
        return -1, ""
    }
    return id, pairs[1]
}

// NewFriendlyID returns a ~somewhat unique friendly id.
func NewFriendlyID(id int64, key string) string {
    n := time.Now()
    i, _ := strconv.Atoi(
        fmt.Sprintf("%d%d%d%d%d%d%d%d%d",
            id,
            len(key),
            n.Year()-2000,
            int(n.Month()),
            n.Day(),
            n.Hour(),
            n.Minute(),
            n.Second(),
            n.Nanosecond()))
    return fmt.Sprintf("%x", i)
}

func StringToKey(s string) int64 {
    i, err := strconv.ParseInt(s, 10, 64)
    if err != nil {
        log.Printf("error converting %s to int64\n", s)
        return -1
    }
    return i
}