<?php

declare(strict_types=1);

namespace PhpQml\Bridge;

/**
 * The four `op` values used in the bridge's Mercure envelopes (PLAN.md §4).
 *
 * String-backed so `$op->value` is exactly the wire-format token QML
 * clients see. Encoded as an enum (rather than `string` parameters) so
 * the typo `'upsret'` is caught at the type level instead of producing
 * an envelope clients silently ignore.
 */
enum BridgeOp: string
{
    /** Entity created or updated. */
    case Upsert = 'upsert';

    /** Entity removed. */
    case Delete = 'delete';

    /** Whole-collection replacement (e.g. server-side reset / re-seed). */
    case Replace = 'replace';

    /** Domain event on `app://event/{name}` topic — not tied to a model row. */
    case Event = 'event';
}