Laravel to zapier webhook: How to avoid resource exhaustion? - laravel

Question

My project requires me to retrieve inbound & outbound mails, retrieve the recipient emails, cc emails, sender email, store the retrieved emails in the database, do some computation, and update or create a row in google sheets.
My steps to doing the task:
In zapier, I have create zaps that triggers when receiving, and sending mails.
In my laravel, I have a function that receives and stores the data in the database from zapier when the receive/sent zap triggers.
After storing all the data, the function will then return the email, email domains of the inserted data, which will then be passed to the computation function.
I also have a zap that updates the google sheet. (My api -> Webhooks by Zapier -> Google Sheet)
After the computation, the computed data, in a form of multidimensional array, loop through it, and call the Update sheet webhook endpoint in each iteration.
A sample code, let's do example for sending mails:
// Controller
public function sent(Request $request)
{
$recipients = explode(",", $request->recipients); // Need to explode since the recipients is being received as comma delimited string.
$ccs = explode(",", $request->ccs); // Need to explode since the cc emails is being received as comma delimited string.
ProcessMail::dispatch($recipients, $ccs);
}
// Service class responsible for doing the logic
public function processSent($recipients, $ccs)
{
$new_recipients = [];
$new_ccs = [];
foreach ($recipients as $recipient) {
$domain = explode('#', $recipient)[1];
$recipientModel = tap(Mail::updateOrCreate(
['email' => $recipient, 'domain' => $domain],
))->increment('count_column');
$new_recipients[] = [
'email' => $recipient,
'domain' => $domain,
'count_column' => $recipientModel->count_column,
];
}
// Same process for the cc emails
return array_merge($new_recipients, $new_ccs);
}
// ProcessMail Job
$recipients_and_ccs = $service->processSent($recipients, $ccs);
Http::pool(function (Pool $pool) use ($service, $recipients_and_ccs ) {
foreach ($recipients_and_ccs as $key => $rec_cc) {
$addtl_rows = $service->getAddtlRows($rec_cc['email'], $rec_cc['domain']);
// The purpose of this to append 5 additional key value pair in the array.
for ($i = 0; $i < 5; $i++) {
$rec_cc["addt_row_{$i}"] = isset($addt_rows[$i]) ? 'this' : 'that';
}
$pool->as("pool-{$key}")->withBody(json_encode($rec_cc), 'json')->post('ZAPIER_ENDPOINT');
return $pool;
}
});
Now, when I send a mail to 50 recipients, some of the task in the zap will stop with error saying: The app returned "Resource has been exhausted (e.g. check quota)."..
One solution that I can think of is to chunk the $recipients_and_ccs by desirable amount of rows, say 10 records per chunk.
But before I start with my solution. It would be really great to hear some more pro/optimized solution.