PHP merging arrays by multiple factors - php

Question

I have an array of arrays like so:
[
[
"reference" => "CUSTOMER-LONDON",
"Type" => "Clothing",
"Currency" => "GBP",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "socks",
"shoppingBreakdownPrice" => 3.99,
"color" => "red",
"size" => "large",
"refundAllowed" => true,
"method" => "deniero"
],
[
"reference" => "CUSTOMER-LONDON",
"Type" => "Clothing",
"Currency" => "GBP",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "Trousers",
"shoppingBreakdownPrice" => 9.99,
"color" => "blue",
"size" => "small",
"refundAllowed" => true,
"method" => "BTC"
],
[
"reference" => "CUSTOMER-LONDON",
"Type" => "HomeWare",
"Currency" => "GBP",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "towel",
"shoppingBreakdownPrice" => 1.99,
"color" => "yellow",
"size" => "small",
"refundAllowed" => true,
"method" => "deniero"
],
[
"reference" => "CUSTOMER-LONDON",
"Type" => "Clothing",
"Currency" => "USD",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "socks",
"shoppingBreakdownPrice" => 3.99,
"color" => "green",
"size" => "medium",
"refundAllowed" => true,
"method" => "cash"
],
[
"reference" => "CUSTOMER-LONDON",
"Type" => "Clothing",
"Currency" => "USD",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "Trousers",
"shoppingBreakdownPrice" => 9.99,
"color" => "pink",
"size" => "medium",
"refundAllowed" => true,
"method" => "cash"
],
[
"reference" => "CUSTOMER-LONDON",
"Type" => "HomeWare",
"Currency" => "USD",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "towel",
"shoppingBreakdownPrice" => 1.99,
"color" => "blue",
"size" => "medium",
"refundAllowed" => true,
"method" => "card"
],
[
"reference" => "CUSTOMER-USA",
"Type" => "Clothing",
"Currency" => "USD",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "socks",
"shoppingBreakdownPrice" => 3.99,
"color" => "yellow",
"size" => "small",
"refundAllowed" => true,
"method" => "card",
],
[
"reference" => "CUSTOMER-USA",
"Type" => "Clothing",
"Currency" => "USD",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "Trousers",
"shoppingBreakdownPrice" => 9.99,
"color" => "blue",
"size" => "XXL",
"refundAllowed" => true,
"method" => "cash"
],
[
"reference" => "CUSTOMER-USA",
"Type" => "HomeWare",
"Currency" => "USD",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "towel",
"shoppingBreakdownPrice" => 1.99, ,
"color" => "blue",
"size" => "small",
"refundAllowed" => true,
"method" => "cash"
]
]
I am trying to loop through this array and merge them based on these rules:
If the reference, type, currency, shoppingBreakdownType, method are an exact match, then they should be merged into a single array with the difference in breakdowns added as new sub arrays like so:
[
"reference" => "CUSTOMER-LONDON",
"Type" => "Clothing",
"Currency" => "GBP",
"color" => "red",
"size" => "large",
"refundAllowed" => true,
"method" => "deniero",
"breakdownTypes": [
{
"shoppingBreakdownType" => "Mens",
"breakdowns": [
{
"shoppingBreakdown" => "socks",
"shoppingBreakdownPrice" => 3.99,
},
{
"shoppingBreakdown" => "towel",
"shoppingBreakdownPrice" => 1.99
}
]
}
]
],
[
"reference" => "CUSTOMER-LONDON",
"Type" => "Clothing",
"Currency" => "GBP",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "Trousers",
"shoppingBreakdownPrice" => 9.99,
"color" => "blue",
"size" => "small",
"refundAllowed" => true,
"method" => "BTC"
],
[
"reference" => "CUSTOMER-LONDON",
"Type" => "Clothing",
"Currency" => "USD",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "socks",
"shoppingBreakdownPrice" => 3.99,
"color" => "green",
"size" => "medium",
"refundAllowed" => true,
"method" => "cash",
"breakdownTypes": [
{
"shoppingBreakdownType" => "Mens",
"breakdowns": [
{
"shoppingBreakdown" => "socks",
"shoppingBreakdownPrice" => 3.99,
},
{
"shoppingBreakdown" => "Trousers",
"shoppingBreakdownPrice" => 1.99
}
]
}
]
],
[
"reference" => "CUSTOMER-USA",
"Type" => "Clothing",
"Currency" => "USD",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "socks",
"shoppingBreakdownPrice" => 3.99,
"color" => "yellow",
"size" => "small",
"refundAllowed" => true,
"method" => "card",
"breakdownTypes": [
{
"shoppingBreakdownType" => "Mens",
"breakdowns": [
{
"shoppingBreakdown" => "socks",
"shoppingBreakdownPrice" => 3.99,
},
{
"shoppingBreakdown" => "Trousers",
"shoppingBreakdownPrice" => 9.99,
},
{
"shoppingBreakdown" => "towel",
"shoppingBreakdownPrice" => 1.99,
}
]
}
]
],
[
"reference" => "CUSTOMER-LONDON",
"Type" => "HomeWare",
"Currency" => "USD",
"shoppingBreakdownType" => "Mens",
"shoppingBreakdown" => "towel",
"shoppingBreakdownPrice" => 1.99,
"color" => "blue",
"size" => "medium",
"refundAllowed" => true,
"method" => "card"
]
as you can see, where those 5 values match. Then then a new child array is created called breakdownTypes, which has arrays grouped by shoppingBreakdownType with multiple items stored as arrays in breakdowns
I have spent nearly two days trying foreach loops and filters but I seem to get stuck in the loops and am unable to to get previous iteration data etc..
Is there a simple way to do this?

Answer 1

You can try something like this:
You compared some of the subarrays keys to make the merge, but other keys like color are not considered and they could have different values, in this situation I preserve the first subarray value.
I don't unset subarrays values (shoppingBreakdown, shoppingBreakdownPrice, etc) because in your example in one case you unset them and in other case you don't. Unset lines are commented. You can't unset shoppingBreakdownType there because you need it to compare.
I don't compare shoppingBreakdown and shoppingBreakdownPrice to check if they are equal or not when two subarrays match, I put both of them into breakdownTypes.
<?php
$res = array();
$keysToCompare = array("reference", "Type", "Currency", "shoppingBreakdownType", "method");
foreach($data as $dataSubArray) {
$find = false;
foreach($res as $resKey => $resSubArray) {
$same = true;
foreach($keysToCompare as $key) {
if($dataSubArray[$key] != $resSubArray[$key]) {
$same = false;
}
}
if($same) {
$find = true;
break;
}
}
if($find) {
if(array_key_exists("breakdownTypes", $res[$resKey])) {
$res[$resKey]["breakdownTypes"]["breakdowns"][] = array("shoppingBreakdown" => $dataSubArray["shoppingBreakdown"], "shoppingBreakdownPrice" => $dataSubArray["shoppingBreakdownPrice"]);
} else {
$res[$resKey]["breakdownTypes"] = array("shoppingBreakdownType" => $res[$resKey]["shoppingBreakdownType"],
"breakdowns" => array (array("shoppingBreakdown" => $res[$resKey]["shoppingBreakdown"], "shoppingBreakdownPrice" => $res[$resKey]["shoppingBreakdownPrice"]),
array("shoppingBreakdown" => $dataSubArray["shoppingBreakdown"], "shoppingBreakdownPrice" => $dataSubArray["shoppingBreakdownPrice"]))
);
/*
unset($res[$resKey]["shoppingBreakdown"]);
unset($res[$resKey]["shoppingBreakdownPrice"]);
*/
}
$find = false;
} else {
$res[] = $dataSubArray;
}
}
?>