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<?php
declare(strict_types=1);
/**
* @copyright 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @author 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @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 <http://www.gnu.org/licenses/>.
*/
namespace OCA\Mail\IMAP\Threading;
use JsonSerializable;
use RuntimeException;
use function array_key_exists;
use function spl_object_id;
class Container implements JsonSerializable {
/** @var Message|null */
private $message;
/** @var string|null */
private $id;
/** @var bool */
private $root;
/** @var Container|null */
private $parent;
/** @var Container[] */
private $children = [];
private function __construct(?Message $message,
?string $id = null,
bool $root = false) {
$this->message = $message;
$this->id = $id;
$this->root = $root;
}
public static function root(): self {
return new self(
null,
null,
true
);
}
public static function empty(?string $id = null): self {
return new self(
null,
$id,
);
}
public static function with(Message $message): self {
return new self(
$message
);
}
public function fill(Message $message): void {
$this->message = $message;
}
public function hasMessage(): bool {
return $this->message !== null;
}
public function getMessage(): ?Message {
return $this->message;
}
public function getId(): ?string {
return $this->id;
}
public function isRoot(): bool {
return $this->root;
}
public function hasParent(): bool {
return $this->parent !== null;
}
public function getParent(): Container {
if ($this->isRoot() || $this->parent === null) {
throw new RuntimeException('Container root has no parent');
}
return $this->parent;
}
public function setParent(?Container $parent): void {
$this->unlink();
$this->parent = $parent;
if ($parent !== null) {
$parent->children[spl_object_id($this)] = $this;
}
}
public function hasAncestor(Container $container): bool {
if ($this->parent === $container) {
return true;
}
if ($this->parent !== null) {
return $this->parent->hasAncestor($container);
}
return false;
}
public function unlink(): void {
if ($this->parent !== null) {
$this->parent->removeChild($this);
}
$this->parent = null;
}
private function removeChild(Container $child): void {
$objId = spl_object_id($child);
if (array_key_exists($objId, $this->children)) {
unset($this->children[$objId]);
}
}
public function hasChildren(): bool {
return !empty($this->children);
}
/**
* @return Container[]
*/
public function getChildren(): array {
return $this->children;
}
public function jsonSerialize() {
return [
'message' => $this->message,
'id' => $this->id,
'root' => $this->root,
'children' => $this->children,
];
}
}
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