Rearrange Object PHP - php

Question

I have a list of product objects, it look like this:
Product Object
(
[id:private] => 1688115
[categoryId:private] => 1
[merchant:private] => theredshop
[name:private] => Pepsi Max Cans 6 x 375mL
)
every fetch data, i fetch 15 record (Im using using ElasticSearch), for the 15 record the product order is by merchant name, so it will be 1 merchant stacked on top, then goes to next merchant.
What i want to do is to 'shuffle' the object result order to at least 1 merchant shows once then put another merchant next. for example, here my current result:
merchant name
theredshop pepsi
theredshop lorem
theredshop ipsum
what i want is
merchant name
theredshop pepsi
sevel lorem
bluecircle ipsum
I know how to arrange the result by looping and checking the merchant name that has been loaded. but how can i re arrange the object result back? or should i just recreate the object?

Answer 1

Assuming a record table $products it can be written in PHP like that:
// restructure array as merchants having nested record sets
$merchants = [];
foreach(array_unique(array_column($products, 'merchant')) as $merchant)
$merchants[$merchant] = array_values(array_filter($products, function($v)use($merchant){ return $v->merchant === $merchant;}));
// itererate over indexes up do max. products per merchant and a add a product of
// each merchant having a record with that index
$max_count = max(array_map(function($v){return count($v);}, $merchants));
$new_order = [];
for($i = 0; $i<$max_count; $i++)
foreach ($merchants as $merchant)
if($item = $merchant[$i] ?? false)
$new_order[] = $item;
var_dump($new_order);
According to your comments you seem to have an object which you called "list" similar like that:
$products_object = (object)
[
(object)[
'merchant' => 'theredshop',
'name' => 'pepsi',
],
(object)[
'merchant' => 'sevel',
'name' => 'pepsi',
],
(object)[
'merchant' => 'sevel',
'name' => 'lorem',
],
(object)[
'merchant' => 'sevel',
'name' => 'ipsum',
],
(object)[
'merchant' => 'bluecircle',
'name' => 'ipsum',
],
];
Convert it into an array first in order to operate with array functions on it:
$products = (array) $products_object;