[Laravel Collctions] insertBefore and InsertAFter

insertIntoCollection.php

<?php

// at some point I wanted to insert stuff before/after specific item in a collection, and this was made.
// use it at your own risk.

Collection::macro('insertBefore', function ($target, $value, $new_key = null) {
    if (is_int($target)) {
        $this->items = array_merge(array_slice($this->items, 0, $target), [$value], array_slice($this->items, $target));
        return;
    }

    foreach ($this->items as $key=>$old) {
        if ($key===$target && is_null($new_key)) {
            $new[] = $value;
        } elseif ($key===$target) {
            $new[$new_key] = $value;
        }
        $new[$key]=$old;
    }

    $this->items = $new;
});

Collection::macro('insertAfter', function ($target, $value, $new_key = null) {
    if (is_int($target)) {
        $this->items = array_merge(array_slice($this->items, 0, $target+1), [$value], array_slice($this->items, $target+1));
        return;
    }
    
    foreach ($this->items as $key=>$old) {
        $new[$key]=$old;
        if ($key===$target && is_null($new_key)) {
            $new[] = $value;
        } elseif ($key===$target) {
            $new[$new_key] = $value;
        }
    }

    $this->items = $new;
});