Sort the array sing the given callback.
| public sortBy ( callable $callback, string $key = null, integer $options = SORT_REGULAR, boolean $isDescending = false ) : array | ||
| $callback | callable | Callback should be a function with the following signature: ```php function($key, $value) { // return $processedValue; } ``` |
| $key | string | Element to sort using "dot" notation. You can to escape a dot in a key surrendering with brackets: "[.]" |
| $options | integer | See sort_flags at http://php.net/manual/es/function.sort.php |
| $isDescending | boolean | |
| return | array | |
/**
* Sorts items in this collection.
* e.g:.
*
* ```
* $itemCollection = new ItemCollection();
* // warm-up...
* $items = $itemCollection->sortItems('date', true)->all();
* ```
*
* @param string $attribute The name of the attribute used to sort
* @param bool $descending Is descending sort?
* @param string[] $collections Only the items belong to Collections will be affected
*
* @return Yosymfony\Spress\Core\Support\ItemCollection An intance of itself
*/
public function sortItems($attribute, $descending = true, array $collections = [])
{
$itemCollections = $this->all($collections, true);
$callback = function ($key, ItemInterface $item) use($attribute) {
$attributes = $item->getAttributes();
return isset($attributes[$attribute]) === true ? $attributes[$attribute] : null;
};
foreach ($itemCollections as $collection => $items) {
$arr = new ArrayWrapper($items);
$itemsSorted = $arr->sortBy($callback, null, SORT_REGULAR, $descending);
$this->itemCollections[$collection] = $itemsSorted;
}
$this->items = [];
foreach ($this->itemCollections as $collection => $items) {
$this->items = array_merge($this->items, $items);
}
return $this;
}
protected function sortItemsByAttribute(array $items, $attribute, $sortType)
{
$arr = new ArrayWrapper($items);
$callback = function ($key, ItemInterface $item) use($attribute) {
$attributes = $item->getAttributes();
return isset($attributes[$attribute]) === true ? $attributes[$attribute] : null;
};
return $arr->sortBy($callback, null, SORT_REGULAR, $sortType === 'descending');
}
public function testSortByKey()
{
$a = new ArrayWrapper(['level1' => ['a' => ['date' => '2015-11-01', 'id' => 3], 'b' => ['date' => '2015-11-02', 'id' => 2], 'c' => ['date' => '2015-11-03', 'id' => 1]]]);
$b = $a->sortBy(function ($key, $value) {
return $value['id'];
}, 'level1');
$this->assertCount(3, $b);
$this->assertEquals(1, array_values($b)[0]['id']);
$this->assertEquals(2, array_values($b)[1]['id']);
$this->assertEquals(3, array_values($b)[2]['id']);
}