PixivFE/core/config/session.go

package core

import (
	"log"
	"math/rand"
	"strings"
	"time"

	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/middleware/session"
)

var Store *session.Store

func SetupStorage() {
	Store = session.New(session.Config{
		Expiration: time.Hour * 24 * 30,
	})
}

func saveSession(sess *session.Session) error {
	if err := sess.Save(); err != nil {
		return err
	}

	return nil
}

func ProxyImageUrl(s string) string {
	s = strings.ReplaceAll(s, `https:\/\/i.pximg.net`, "https://"+GlobalServerConfig.ProxyServer)
	// s = strings.ReplaceAll(s, `https:\/\/i.pximg.net`, "/proxy/i.pximg.net")
	s = strings.ReplaceAll(s, `https:\/\/s.pximg.net`, "/proxy/s.pximg.net")
	return s
}

func GetImageProxy(c *fiber.Ctx) string {
	sess, err := Store.Get(c)
	if err != nil {
		log.Fatalln("Failed to get current session and its values! Falling back to server default!")
		return GlobalServerConfig.ProxyServer
	}
	value := sess.Get("ImageProxy")
	if value != nil {
		return value.(string)
	}

	return GlobalServerConfig.ProxyServer
}

func GetRandomDefaultToken() string {
	defaultToken := GlobalServerConfig.Token[rand.Intn(len(GlobalServerConfig.Token))]

	return defaultToken
}

func GetToken(c *fiber.Ctx) string {
	defaultToken := GlobalServerConfig.Token[rand.Intn(len(GlobalServerConfig.Token))]

	sess, err := Store.Get(c)
	if err != nil {
		log.Fatalln("Failed to get current session and its values! Falling back to server default!")
		return defaultToken
	}
	value := sess.Get("Token")
	if value != nil {
		return value.(string)
	}

	return defaultToken
}

func CheckToken(c *fiber.Ctx) string {
	sess, err := Store.Get(c)
	if err != nil {
		log.Fatalln("Failed to get current session and its values!")
		return ""
	}
	value := sess.Get("Token")
	if value != nil {
		return value.(string)
	}

	return ""
}

func GetCSRFToken(c *fiber.Ctx) string {
	sess, err := Store.Get(c)
	if err != nil {
		log.Fatalln("Failed to get current session and its values!")
		return ""
	}
	value := sess.Get("CSRF")
	if value != nil {
		return value.(string)
	}

	return ""
}

func SetSessionValue(c *fiber.Ctx, name, value string) error {
	sess, err := Store.Get(c)
	if err != nil {
		return err
	}

	sess.Set(name, value)

	if err = saveSession(sess); err != nil {
		log.Fatalln("Failed to save session storage!")
		return err
	}

	return nil
}

func RemoveSessionValue(c *fiber.Ctx, name string) error {
	sess, err := Store.Get(c)
	if err != nil {
		return err
	}

	sess.Delete(name)

	if err = saveSession(sess); err != nil {
		log.Fatalln("Failed to save session storage!")
		return err
	}

	return nil
}