zappyzep/backend/src/utils/getMissingPermissions.ts

17 lines
678 B
TypeScript

import { Constants, Permission } from "eris";
/**
* @param resolvedPermissions A Permission object from e.g. GuildChannel#permissionsOf() or Member#permission
* @param requiredPermissions Bitmask of required permissions
* @return Bitmask of missing permissions
*/
export function getMissingPermissions(resolvedPermissions: Permission, requiredPermissions: number | bigint): bigint {
const allowedPermissions = BigInt(resolvedPermissions.allow);
const nRequiredPermissions = BigInt(requiredPermissions);
if (Boolean(allowedPermissions & BigInt(Constants.Permissions.administrator))) {
return BigInt(0);
}
return nRequiredPermissions & ~allowedPermissions;
}