MM-9779: Incorporate a Token into the invitations system (#8604)

* Incorporate a Token into the invitations system

* Adding unit tests

* Fixing some api4 client tests

* Removing unnecesary hash validation

* Change the Hash concept on invitations with tokenId

* Not send invitation if it wasn't able to create the Token

* Fixing some naming problems

* Changing the hash query params received from the client side

* Removed unneded data param in the token usage

app/email.go

@@ -270,15 +270,22 @@ func (a *App) SendInviteEmails(team *model.Team, senderName string, invites []st
 			bodyPage.Html["ExtraInfo"] = utils.TranslateAsHtml(utils.T, "api.templates.invite_body.extra_info",
 				map[string]interface{}{"TeamDisplayName": team.DisplayName, "TeamURL": siteURL + "/" + team.Name})
 
+			token := model.NewToken(
+				TOKEN_TYPE_TEAM_INVITATION,
+				model.MapToJson(map[string]string{"teamId": team.Id, "email": invite}),
+			)
+
 			props := make(map[string]string)
 			props["email"] = invite
-			props["id"] = team.Id
 			props["display_name"] = team.DisplayName
 			props["name"] = team.Name
-			props["time"] = fmt.Sprintf("%v", model.GetMillis())
 			data := model.MapToJson(props)
-			hash := utils.HashSha256(fmt.Sprintf("%v:%v", data, a.Config().EmailSettings.InviteSalt))
-			bodyPage.Props["Link"] = fmt.Sprintf("%s/signup_user_complete/?d=%s&h=%s", siteURL, url.QueryEscape(data), url.QueryEscape(hash))
+
+			if result := <-a.Srv.Store.Token().Save(token); result.Err != nil {
+				l4g.Error(utils.T("api.team.invite_members.send.error"), result.Err)
+				continue
+			}
+			bodyPage.Props["Link"] = fmt.Sprintf("%s/signup_user_complete/?d=%s&t=%s", siteURL, url.QueryEscape(data), url.QueryEscape(token.Token))
 
 			if !a.Config().EmailSettings.SendEmailNotifications {
 				l4g.Info(utils.T("api.team.invite_members.sending.info"), invite, bodyPage.Props["Link"])