PHP array of objects traversing - php

Question

I have this array of objects:
Array A:
[
{
"id":1,
"type":"title",
"data": "Title goes here"
},
{
"id":2,
"type":"repeat"
"number":3,
},
{
"id":3,
"type":"media"
"data": "path to media"
},
{
"id":4,
"type":"close_repeat"
},
{
"id":5,
"type":"repeat"
"number":3,
},
{
"id":6,
"type":"title",
"data": "Title goes here"
},
{
"id":7,
"type":"repeat"
"number":2,
},
{
"id":8,
"type":"text"
"data": "Text goes here"
},
{
"id":9,
"type":"close_repeat"
},
{
"id":10,
"type":"close_repeat"
},
{
"id":11,
"type":"cover",
"data": "Cover data goes here"
},
]
And I want to transfer it into:
Array B
[
{
"id":1,
"type":"title",
"data": "Title goes here",
"repeat":1
},
{
"id":3,
"type":"media"
"data": "path to media",
"repeat":1
},
{
"id":6,
"type":"title",
"data": "Title goes here",
"repeat":3
},
{
"id":8,
"type":"text"
"data": "Text goes here",
"repeat":6
},
{
"id":11,
"type":"cover",
"data": "Cover data goes here",
"repeat":1
},
]
The idea is that Array A (the original) has two special objects of type repeat and close_repeat. Objects of type repeat have an extra attribute called number. The value of this attribute specifies how many times the objects between repeat and close_repeat should be repeated. Further more, repeat and close_repeat can be nested so that if we strat repeat then before closing it we start another repeat then the objects that follows have to be repeated based on the multiples of the two repeats. So in the Array A, object with id:8 should be repeated 6 times because the repeat of the repeat of object with id:5 and id:7 in which 3*2 = 6. Now I don't want yet to repeat the objects in the resulting array but simply add a new attribute to each object which says how many times an object should be repeated. As it can be seen in array B object with id:8: it should have a new attribute called repeatand should have the value of6`. I'm struggling to wrap my head around it.
I tried with loops and recursions but I was never even close to anything.
public function loopOver($data, &$newData, &$repeat, &$previousRepeat, $i){
$dataCount = count($data);
for( ; $i<$dataCount; $i++){
if($data[$i]['type']=='repeat'){
$previousRepeat = $data[$i]['number'];
$repeat = $repeat * $data[$i]['number'];
return $this->loopOver($data, $newData, $repeat, $previousRepeat, $i+1);
}
if($data[$i]['type']=='close_repeat'){
$repeat = $repeat/$previousRepeat;
return $this->loopOver($data, $newData, $repeat, $previousRepeat, $i+1);
}
if($i >= $dataCount){
return $newData;
}
$tmpData = $data[$i];
$tmpData['repeat'] = $repeat;
$newData [] = $tmpData;
}
}
The above codes returns the correct list but the repeat is not accurate.

Answer 1

$data = [
[
"id"=>1,
"type"=>"title",
"data"=> "Title goes here"
],
[
"id"=>2,
"type"=>"repeat",
"number"=>3,
],
[
"id"=>3,
"type"=>"media",
"data"=> "path to media"
],
[
"id"=>4,
"type"=>"close_repeat"
],
[
"id"=>5,
"type"=>"repeat",
"number"=>3,
],
[
"id"=>6,
"type"=>"title",
"data"=> "Title goes here"
],
[
"id"=>7,
"type"=>"repeat",
"number"=>2,
],
[
"id"=>8,
"type"=>"text",
"data"=> "Text goes here"
],
[
"id"=>9,
"type"=>"close_repeat"
],
[
"id"=>10,
"type"=>"close_repeat"
],
[
"id"=>11,
"type"=>"cover",
"data"=> "Cover data goes here"
],
];
$newData = array();
$new_arr = array();
$count_arr = 0;
foreach ($data as $arr) {
if (key_exists('data', $arr)) {
$new_arr[$count_arr++] = $arr;
}
}
$count_arr = 0;
$repeat = 0;
$first_key = array_key_first($new_arr);
$last_key = array_key_last($new_arr);
foreach ($new_arr as $key => $value) {
$newData[$key] = $value;
// Create repeat key and set value
if ($key == $first_key) {
// repeat key value for first arr
$newData[$count_arr++]['repeat'] = $new_arr[$repeat++]['id'];
} elseif ($key == $last_key) {
// repeat key value for last arr (same as first repeat key value)
$newData[$count_arr++]['repeat'] = $new_arr[$first_key]['id'];
} else {
// repeat key value for others array
$newData[$count_arr++]['repeat'] = $new_arr[$repeat++ - 1]['id'];
}
}
// new data
echo '<pre>';
print_r($newData);
echo '</pre>';