client.go

package core

import (
	"errors"
	uuid "github.com/satori/go.uuid"
	log "github.com/sirupsen/logrus"
	"github.com/skip2/go-qrcode"
	"gitlab.127-0-0-1.fr/vx3r/wg-gen-web/model"
	"gitlab.127-0-0-1.fr/vx3r/wg-gen-web/storage"
	"gitlab.127-0-0-1.fr/vx3r/wg-gen-web/template"
	"gitlab.127-0-0-1.fr/vx3r/wg-gen-web/util"
	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
	"gopkg.in/gomail.v2"
	"io/ioutil"
	"os"
	"path/filepath"
	"sort"
	"strconv"
	"time"
)

// CreateClient client with all necessary data
func CreateClient(client *model.Client) (*model.Client, error) {
	// check if client is valid
	errs := client.IsValid()
	if len(errs) != 0 {
		for _, err := range errs {
			log.WithFields(log.Fields{
				"err": err,
			}).Error("client validation error")
		}
		return nil, errors.New("failed to validate client")
	}

	u := uuid.NewV4()
	client.Id = u.String()

	key, err := wgtypes.GeneratePrivateKey()
	if err != nil {
		return nil, err
	}
	client.PrivateKey = key.String()
	client.PublicKey = key.PublicKey().String()

	presharedKey, err := wgtypes.GenerateKey()
	if err != nil {
		return nil, err
	}
	client.PresharedKey = presharedKey.String()

	reserverIps, err := GetAllReservedIps()
	if err != nil {
		return nil, err
	}

	ips := make([]string, 0)
	for _, network := range client.Address {
		ip, err := util.GetAvailableIp(network, reserverIps)
		if err != nil {
			return nil, err
		}
		if util.IsIPv6(ip) {
			ip = ip + "/128"
		} else {
			ip = ip + "/32"
		}
		ips = append(ips, ip)
	}
	client.Address = ips
	client.Created = time.Now().UTC()