[$250] [P2P Distance] Split - Incorrect amount & distance behavior when changing distance on confirm page offline

[IuliiaHerets]

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Version Number: v9.0.18-1
Reproducible in staging?: Y
Reproducible in production?: N
Email or phone of affected tester (no customers): applausetester+kh050806@applause.expensifail.com
Issue reported by: Applause Internal Team

Action Performed:

1. Go to staging.new.expensify.com
2. Go to group chat.
3. Click + > Split expense > Distance.
4. Enter waypoints > Next.
5. On confirmation page, go offline.
6. Click Distance.
7. Change distance by swapping position and save it.

Expected Result:

• Amount field will be empty.
• Distance field will change to Pending.
• Split input will be 0.00.

Actual Result:

Amount, Distance and split inputs change to a very big value.

Workaround:

Unknown

Platforms:

Which of our officially supported platforms is this issue occurring on?

• Android: Native
• Android: mWeb Chrome
• iOS: Native
• iOS: mWeb Safari
• MacOS: Chrome / Safari
• MacOS: Desktop

Screenshots/Videos

Bug6565228_1723089231018.20240808_114732.mp4

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Issue Owner

Current Issue Owner: @carlosmiceli

[melvin-bot]

Triggered auto assignment to @Julesssss (DeployBlockerCash), see https://stackoverflowteams.com/c/expensify/questions/9980/ for more details.

[melvin-bot]

Triggered auto assignment to @greg-schroeder (Bug), see https://stackoverflow.com/c/expensify/questions/14418 for more details. Please add this bug to a GH project, as outlined in the SO.

[IuliiaHerets]

We think that this bug might be related to #vip-split

[github-actions]

👋 Friendly reminder that deploy blockers are time-sensitive ⏱ issues! Check out the open `StagingDeployCash` deploy checklist to see the list of PRs included in this release, then work quickly to do one of the following:

1. Identify the pull request that introduced this issue and revert it.
2. Find someone who can quickly fix the issue.
3. Fix the issue yourself.

[bernhardoj]

Proposal

Please re-state the problem that we are trying to solve in this issue.

The distance, amount, and individual split share changes to a very big value.

What is the root cause of that problem?

From the expected result, the 1st (Amount field will be empty) and 2nd problem (Distance field will change to Pending) is the same root cause as #46952 and is currently being handled in #46964.

For the 3rd problem (Split input will be 0.00), even after we fix the 1st and 2nd, the split amount still won't be 0 when the distance amount is 0 because we only update the individual split amount if the distance amount (amount) is truth (> 0).

App/src/components/MoneyRequestConfirmationList.tsx

Lines 345 to 348 in 9c7c4a1

	const participantAccountIDs: number[] = selectedParticipantsProp.map((participant) => participant.accountID ?? -1);
	if (isTypeSplit && !isPolicyExpenseChat && amount && transaction?.currency) {
	IOU.setSplitShares(transaction, amount, currency, participantAccountIDs);
	}

What changes do you think we should make in order to solve the problem?

If we want to update the individual split amount to 0 when the distance amount is 0, then we need to remove the amount check here.

App/src/components/MoneyRequestConfirmationList.tsx

Lines 345 to 348 in 9c7c4a1

	const participantAccountIDs: number[] = selectedParticipantsProp.map((participant) => participant.accountID ?? -1);
	if (isTypeSplit && !isPolicyExpenseChat && amount && transaction?.currency) {
	IOU.setSplitShares(transaction, amount, currency, participantAccountIDs);
	}

However, I notice that when we create the split distance while offline with the pending distance, the request will always fail and also, the participant is only the current user because we don't include participants with 0 split amount.

App/src/libs/actions/IOU.ts

Line 4053 in 9c7c4a1

const splits: Split[] = [{email: currentUserEmailForIOUSplit, accountID: currentUserAccountID, amount: currentUserAmount, taxAmount: currentUserTaxAmount}];

App/src/pages/iou/request/step/IOURequestStepConfirmation.tsx

Lines 342 to 352 in 9c7c4a1

	let splitParticipants = selectedParticipants;
	// Filter out participants with an amount equal to O
	if (iouType === CONST.IOU.TYPE.SPLIT && transaction?.splitShares) {
	const participantsWithAmount = Object.keys(transaction.splitShares ?? {})
	.filter((accountID: string): boolean => (transaction?.splitShares?.[Number(accountID)]?.amount ?? 0) > 0)
	.map((accountID) => Number(accountID));
	splitParticipants = selectedParticipants.filter((participant) =>
	participantsWithAmount.includes(participant.isPolicyExpenseChat ? participant?.ownerAccountID ?? -1 : participant.accountID ?? -1),
	);
	}

App/src/libs/actions/IOU.ts

Lines 4062 to 4066 in 9c7c4a1

	// To exclude someone from a split, the amount can be 0. The scenario for this is when creating a split from a group chat, we have remove the option to deselect users to exclude them.
	// We can input '0' next to someone we want to exclude.
	if (splitAmount === 0) {
	return;
	}

I tried to always include the participant even when the amount is 0, but it still fails.

Maybe we can disable the confirmation button if the distance amount is 0.