[HOLD for payment 2023-05-22] [$1000] App crashes when right clicking on a reaction once sender react to message with multiple emoji tone color, and recipient reacts to it

[kavimuru]

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Action Performed:

1. Open an existing group chat (account A)
2. Send a message
3. Hover over the message and react to the message with emoji
4. Change skin tone and add the same emoji reaction to the existing emoji reaction
5. On another window open the group chat with one of the group participants account (account B)
6. Add the same emoji reaction to the message (add same emoji)
7. Shift windows to account A , and right click on the reacted emoji

Expected Result:

System should display the list of user that has reacted with the emoji

Actual Result:

App crashes down

Workaround:

Can the user still use Expensify without this being fixed? Have you informed them of the workaround?

Platforms:

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

• Android / native
• Android / Chrome
• iOS / native
• iOS / Safari
• MacOS / Chrome / Safari
• MacOS / Desktop

Version Number: 1.3.11.2
Reproducible in staging?: y
Reproducible in production?: new feature
If this was caught during regression testing, add the test name, ID and link from TestRail:
Email or phone of affected tester (no customers):
Logs: https://stackoverflow.com/c/expensify/questions/4856
Notes/Photos/Videos: Any additional supporting documentation

2023-05-06.10.23.31.mp4

Recording.515.mp4

Expensify/Expensify Issue URL:
Issue reported by: @Natnael-Guchima
Slack conversation: https://expensify.slack.com/archives/C049HHMV9SM/p1683358345695579

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• Upwork Job URL: https://www.upwork.com/jobs/~01262eda193a5f33e9
• Upwork Job ID: 1655595017535242240
• Last Price Increase: 2023-05-08

[melvin-bot]

Triggered auto assignment to @abekkala (Bug), see https://stackoverflow.com/c/expensify/questions/14418 for more details.

[melvin-bot]

Bug0 Triage Checklist (Main S/O)

• This "bug" occurs on a supported platform (ensure Platforms in OP are ✅)
• This bug is not a duplicate report (check E/App issues and #expensify-bugs)
  • If it is, comment with a link to the original report, close the issue and add any novel details to the original issue instead
• This bug is reproducible using the reproduction steps in the OP. S/O
  • If the reproduction steps are clear and you're unable to reproduce the bug, check with the reporter and QA first, then close the issue.
  • If the reproduction steps aren't clear and you determine the correct steps, please update the OP.
• This issue is filled out as thoroughly and clearly as possible
  • Pay special attention to the title, results, platforms where the bug occurs, and if the bug happens on staging/production.
• I have reviewed and subscribed to the linked Slack conversation to ensure Slack/Github stay in sync

[Natnael-Guchima]

This bug seems to be related with this PR -> #15685

[hungvu193]

Proposal

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

App crashes when right clicking on a reaction once sender react to message with multiple emoji tone color, and recipient reacts to it.

What is the root cause of that problem?

We are calculating reaction users in this line:

 const reactionUsers = _.map(reaction.users, sender => sender.accountID.toString());

When user changed the skin stone and reacted to the message, the reactionUsers will have duplicate item in it.
For example:  ['12736676', '12736676', '12736676', '12812778']
Now, let take a look at the function we used to get the users from reactionUsers above:

App/src/libs/PersonalDetailsUtils.js

Lines 19 to 37 in d120f6a

	function getPersonalDetailsByIDs(accountIDs, shouldChangeUserDisplayName = false) {
	const result = [];
	const currentAccountID = Report.getCurrentUserAccountID();
	_.each(personalDetails, (detail) => {
	for (let i = 0; i < accountIDs.length; i++) {
	if (detail.accountID === accountIDs[i]) {
	if (shouldChangeUserDisplayName && currentAccountID.toString() === detail.accountID) {
	result[i] = {
	...detail,
	displayName: Localize.translateLocal('common.you'),
	};
	} else {
	result[i] = detail;
	}
	break;
	}
	}
	});
	return result;

Let take a look at line 33, right after we found the result we want, we break the loop. So when our array has duplicate item like my example, after the first one was found, the loop break and move to the next item, the next 2 duplicated will not be found. So the result array will look like this:

firstitem
undefined
undefined
thirditem

Because there were 2 items are undefined, the app will crash while user right click to open reaction list modal, because the list used the key extractor from the item, when item is undefined it will cause the crash.

const keyExtractor = (item, index) => `${item.login}+${index}`;

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

We have few solutions here:

1. Make the reactionUsers list unique. (We can use underscore unique function to do that).
2. Update the getPersonalDetailsByIDs. Instead of assigning the current index of the loop for the result array, we should calculate the next index for the result array.

                const currentIndex = result.length === 0 ? 0 : result.length;
                if (shouldChangeUserDisplayName && currentAccountID.toString() === detail.accountID) {
                    result[currentIndex] = {
                        ...detail,
                        displayName: Localize.translateLocal('common.you'),
                    };
                } else {
                    result[currentIndex] = detail;
                }
                break;

What alternative solutions did you explore? (Optional)

[parasharrajat]

As this issue originated from #15685, even though not directly related to the changes on the PR, this will be handled by the same author.

Thanks for the proposals.

@abekkala Please assign me as C+ to it.

[melvin-bot]

Job added to Upwork: https://www.upwork.com/jobs/~01262eda193a5f33e9

[melvin-bot]

Current assignee @abekkala is eligible for the External assigner, not assigning anyone new.