func cmdAssignRole() {
	if flagCmdAssignRole {
		if len(flagTeamName) == 0 {
			fmt.Fprintln(os.Stderr, "flag needs an argument: -team_name")
			flag.Usage()
			os.Exit(1)
		}

		if len(flagEmail) == 0 {
			fmt.Fprintln(os.Stderr, "flag needs an argument: -email")
			flag.Usage()
			os.Exit(1)
		}

		if !model.IsValidRoles(flagRole) {
			fmt.Fprintln(os.Stderr, "flag invalid argument: -role")
			flag.Usage()
			os.Exit(1)
		}

		c := &api.Context{}
		c.RequestId = model.NewId()
		c.IpAddress = "cmd_line"

		var team *model.Team
		if result := <-api.Srv.Store.Team().GetByName(flagTeamName); result.Err != nil {
			l4g.Error("%v", result.Err)
			flushLogAndExit(1)
		} else {
			team = result.Data.(*model.Team)
		}

		var user *model.User
		if result := <-api.Srv.Store.User().GetByEmail(team.Id, flagEmail); result.Err != nil {
			l4g.Error("%v", result.Err)
			flushLogAndExit(1)
		} else {
			user = result.Data.(*model.User)
		}

		if !user.IsInRole(flagRole) {
			api.UpdateRoles(c, user, flagRole)
		}

		os.Exit(0)
	}
}

func updateRoles(c *Context, w http.ResponseWriter, r *http.Request) {
	props := model.MapFromJson(r.Body)

	user_id := props["user_id"]
	if len(user_id) != 26 {
		c.SetInvalidParam("updateRoles", "user_id")
		return
	}

	new_roles := props["new_roles"]
	if !model.IsValidRoles(new_roles) {
		c.SetInvalidParam("updateRoles", "new_roles")
		return
	}

	if model.IsInRole(new_roles, model.ROLE_SYSTEM_ADMIN) && !c.IsSystemAdmin() {
		c.Err = model.NewAppError("updateRoles", "The system admin role can only be set by another system admin", "")
		c.Err.StatusCode = http.StatusForbidden
		return
	}

	var user *model.User
	if result := <-Srv.Store.User().Get(user_id); result.Err != nil {
		c.Err = result.Err
		return
	} else {
		user = result.Data.(*model.User)
	}

	if !c.HasPermissionsToTeam(user.TeamId, "updateRoles") {
		return
	}

	if !c.IsTeamAdmin() {
		c.Err = model.NewAppError("updateRoles", "You do not have the appropriate permissions", "userId="+user_id)
		c.Err.StatusCode = http.StatusForbidden
		return
	}

	if user.IsInRole(model.ROLE_SYSTEM_ADMIN) && !c.IsSystemAdmin() {
		c.Err = model.NewAppError("updateRoles", "The system admin role can only by modified by another system admin", "")
		c.Err.StatusCode = http.StatusForbidden
		return
	}

	ruser := UpdateRoles(c, user, new_roles)
	if c.Err != nil {
		return
	}

	uchan := Srv.Store.Session().UpdateRoles(user.Id, new_roles)
	gchan := Srv.Store.Session().GetSessions(user.Id)

	if result := <-uchan; result.Err != nil {
		// soft error since the user roles were still updated
		l4g.Error(result.Err)
	}

	if result := <-gchan; result.Err != nil {
		// soft error since the user roles were still updated
		l4g.Error(result.Err)
	} else {
		sessions := result.Data.([]*model.Session)
		for _, s := range sessions {
			sessionCache.Remove(s.Token)
		}
	}

	options := utils.SanitizeOptions
	options["passwordupdate"] = false
	ruser.Sanitize(options)
	w.Write([]byte(ruser.ToJson()))
}