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import { addInstrumentationHandler, getGlobalObject, logger } from '@sentry/utils';
var global = getGlobalObject();
/**
 * Default function implementing pageload and navigation transactions
 */
export function defaultRoutingInstrumentation(startTransaction, startTransactionOnPageLoad, startTransactionOnLocationChange) {
    if (startTransactionOnPageLoad === void 0) { startTransactionOnPageLoad = true; }
    if (startTransactionOnLocationChange === void 0) { startTransactionOnLocationChange = true; }
    if (!global || !global.location) {
        logger.warn('Could not initialize routing instrumentation due to invalid location');
        return;
    }
    var startingUrl = global.location.href;
    var activeTransaction;
    if (startTransactionOnPageLoad) {
        activeTransaction = startTransaction({ name: global.location.pathname, op: 'pageload' });
    }
    if (startTransactionOnLocationChange) {
        addInstrumentationHandler({
            callback: function (_a) {
                var to = _a.to, from = _a.from;
                /**
                 * This early return is there to account for some cases where a navigation transaction starts right after
                 * long-running pageload. We make sure that if `from` is undefined and a valid `startingURL` exists, we don't
                 * create an uneccessary navigation transaction.
                 *
                 * This was hard to duplicate, but this behavior stopped as soon as this fix was applied. This issue might also
                 * only be caused in certain development environments where the usage of a hot module reloader is causing
                 * errors.
                 */
                if (from === undefined && startingUrl && startingUrl.indexOf(to) !== -1) {
                    startingUrl = undefined;
                    return;
                }
                if (from !== to) {
                    startingUrl = undefined;
                    if (activeTransaction) {
                        logger.log("[Tracing] Finishing current transaction with op: " + activeTransaction.op);
                        // If there's an open transaction on the scope, we need to finish it before creating an new one.
                        activeTransaction.finish();
                    }
                    activeTransaction = startTransaction({ name: global.location.pathname, op: 'navigation' });
                }
            },
            type: 'history',
        });
    }
}
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