v3/packages/web/src/utils/roleTransactions.ts

import { Role, RoleTransaction, TransactionType } from '@roleypoly/types';

export const makeRoleTransactions = (
    oldRoles: Role['id'][],
    newRoles: Role['id'][]
): RoleTransaction[] => {
    const transactions: RoleTransaction[] = [];

    // Removes: old roles not in new roles
    for (let oldID of oldRoles) {
        if (!newRoles.includes(oldID)) {
            transactions.push({
                id: oldID,
                action: TransactionType.Remove,
            });
        }
    }

    // Adds: new roles not in old roles
    for (let newID of newRoles) {
        if (!oldRoles.includes(newID)) {
            transactions.push({
                id: newID,
                action: TransactionType.Add,
            });
        }
    }

    return transactions;
};