Remove license globals entirely (#8229)

* remove license globals entirely

* fix infinite recursion

* test fix

utils/license.go

@@ -5,28 +5,21 @@ package utils
 
 import (
 	"crypto"
-	"crypto/md5"
 	"crypto/rsa"
 	"crypto/sha512"
 	"crypto/x509"
 	"encoding/base64"
 	"encoding/pem"
-	"fmt"
 	"io/ioutil"
 	"os"
 	"strconv"
 	"strings"
-	"sync/atomic"
 
 	l4g "github.com/alecthomas/log4go"
 
 	"github.com/mattermost/mattermost-server/model"
 )
 
-var isLicensedInt32 int32
-var licenseValue atomic.Value
-var clientLicenseValue atomic.Value
-
 var publicKey []byte = []byte(`-----BEGIN PUBLIC KEY-----
 MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyZmShlU8Z8HdG0IWSZ8r
 tSyzyxrXkJjsFUf0Ke7bm/TLtIggRdqOcUF3XEWqQk5RGD5vuq7Rlg1zZqMEBk8N
@@ -37,92 +30,6 @@ a0v85XL6i9ote2P+fLZ3wX9EoioHzgdgB7arOxY50QRJO7OyCqpKFKv6lRWTXuSt
 hwIDAQAB
 -----END PUBLIC KEY-----`)
 
-func init() {
-	SetLicense(nil)
-}
-
-func IsLicensed() bool {
-	return atomic.LoadInt32(&isLicensedInt32) == 1
-}
-
-func SetIsLicensed(v bool) {
-	if v {
-		atomic.StoreInt32(&isLicensedInt32, 1)
-	} else {
-		atomic.StoreInt32(&isLicensedInt32, 0)
-	}
-}
-
-func License() *model.License {
-	return licenseValue.Load().(*model.License)
-}
-
-func SetClientLicense(m map[string]string) {
-	clientLicenseValue.Store(m)
-}
-
-func ClientLicense() map[string]string {
-	return clientLicenseValue.Load().(map[string]string)
-}
-
-func LoadLicense(licenseBytes []byte) {
-	if success, licenseStr := ValidateLicense(licenseBytes); success {
-		license := model.LicenseFromJson(strings.NewReader(licenseStr))
-		SetLicense(license)
-		return
-	}
-
-	l4g.Warn(T("utils.license.load_license.invalid.warn"))
-}
-
-var licenseListeners = map[string]func(){}
-
-func AddLicenseListener(listener func()) string {
-	id := model.NewId()
-	licenseListeners[id] = listener
-	return id
-}
-
-func RemoveLicenseListener(id string) {
-	delete(licenseListeners, id)
-}
-
-func SetLicense(license *model.License) bool {
-	defer func() {
-		for _, listener := range licenseListeners {
-			listener()
-		}
-	}()
-
-	if license == nil {
-		SetIsLicensed(false)
-		license = &model.License{
-			Features: new(model.Features),
-		}
-		license.Features.SetDefaults()
-		licenseValue.Store(license)
-
-		SetClientLicense(map[string]string{"IsLicensed": "false"})
-
-		return false
-	} else {
-		license.Features.SetDefaults()
-
-		if !license.IsExpired() {
-			licenseValue.Store(license)
-			SetIsLicensed(true)
-			clientLicenseValue.Store(getClientLicense(license))
-			return true
-		}
-
-		return false
-	}
-}
-
-func RemoveLicense() {
-	SetLicense(nil)
-}
-
 func ValidateLicense(signed []byte) (bool, string) {
 	decoded := make([]byte, base64.StdEncoding.DecodedLen(len(signed)))
 
@@ -213,12 +120,12 @@ func GetLicenseFileLocation(fileLocation string) string {
 	}
 }
 
-func getClientLicense(l *model.License) map[string]string {
+func GetClientLicense(l *model.License) map[string]string {
 	props := make(map[string]string)
 
-	props["IsLicensed"] = strconv.FormatBool(IsLicensed())
+	props["IsLicensed"] = strconv.FormatBool(l != nil)
 
-	if IsLicensed() {
+	if l != nil {
 		props["Id"] = l.Id
 		props["Users"] = strconv.Itoa(*l.Features.Users)
 		props["LDAP"] = strconv.FormatBool(*l.Features.LDAP)
@@ -248,39 +155,3 @@ func getClientLicense(l *model.License) map[string]string {
 
 	return props
 }
-
-func GetClientLicenseEtag(useSanitized bool) string {
-	value := ""
-
-	lic := ClientLicense()
-
-	if useSanitized {
-		lic = GetSanitizedClientLicense()
-	}
-
-	for k, v := range lic {
-		value += fmt.Sprintf("%s:%s;", k, v)
-	}
-
-	return model.Etag(fmt.Sprintf("%x", md5.Sum([]byte(value))))
-}
-
-func GetSanitizedClientLicense() map[string]string {
-	sanitizedLicense := make(map[string]string)
-
-	for k, v := range ClientLicense() {
-		sanitizedLicense[k] = v
-	}
-
-	if IsLicensed() {
-		delete(sanitizedLicense, "Id")
-		delete(sanitizedLicense, "Name")
-		delete(sanitizedLicense, "Email")
-		delete(sanitizedLicense, "PhoneNumber")
-		delete(sanitizedLicense, "IssuedAt")
-		delete(sanitizedLicense, "StartsAt")
-		delete(sanitizedLicense, "ExpiresAt")
-	}
-
-	return sanitizedLicense
-}