Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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friendica/src/BaseCollection.php

148 lines
3.6 KiB

<?php
/**
* @copyright Copyright (C) 2010-2022, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica;
/**
* The Collection classes inheriting from this class are meant to represent a list of structured objects of a single type.
*
* Collections can be used with foreach(), accessed like an array and counted.
*/
class BaseCollection extends \ArrayIterator
{
/**
* This property is used with paginated results to hold the total number of items satisfying the paginated request.
* @var int
*/
protected $totalCount = 0;
/**
* @param BaseEntity[] $entities
* @param int|null $totalCount
*/
public function __construct(array $entities = [], int $totalCount = null)
{
parent::__construct($entities);
$this->totalCount = $totalCount ?? count($entities);
}
/**
* @inheritDoc
*/
#[\ReturnTypeWillChange]
public function offsetSet($key, $value): void
{
if (is_null($key)) {
$this->totalCount++;
}
parent::offsetSet($key, $value);
}
/**
* @inheritDoc
*/
#[\ReturnTypeWillChange]
public function offsetUnset($key): void
{
if ($this->offsetExists($key)) {
$this->totalCount--;
}
parent::offsetUnset($key);
}
/**
* Getter for total count
*
* @return int Total count
*/
public function getTotalCount(): int
{
return $this->totalCount;
}
/**
* Return the values from a single field in the collection
*
* @param string $column
* @param int|null $index_key
* @return array
* @see array_column()
*/
public function column(string $column, $index_key = null): array
{
return array_column($this->getArrayCopy(true), $column, $index_key);
}
/**
* Apply a callback function on all elements in the collection and returns a new collection with the updated elements
*
* @param callable $callback
* @return BaseCollection
* @see array_map()
*/
public function map(callable $callback): BaseCollection
{
return new static(array_map($callback, $this->getArrayCopy()), $this->getTotalCount());
}
/**
* Filters the collection based on a callback that returns a boolean whether the current item should be kept.
*
* @param callable|null $callback
* @param int $flag
* @return BaseCollection
* @see array_filter()
*/
public function filter(callable $callback = null, int $flag = 0): BaseCollection
{
return new static(array_filter($this->getArrayCopy(), $callback, $flag));
}
/**
* Reverse the orders of the elements in the collection
*
* @return $this
*/
public function reverse(): BaseCollection
{
return new static(array_reverse($this->getArrayCopy()), $this->getTotalCount());
}
/**
* @inheritDoc
*
* includes recursion for entity::toArray() function
* @see BaseEntity::toArray()
*/
public function getArrayCopy(bool $recursive = false): array
{
if (!$recursive) {
return parent::getArrayCopy();
}
return array_map(function ($item) {
return is_object($item) ? $item->toArray() : $item;
}, parent::getArrayCopy());
}
}