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<?php |
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namespace Yiranzai\File; |
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use DateTime; |
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/** |
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* Class Bucket |
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* @package Yiranzai\Dht |
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*/ |
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class Bucket |
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{ |
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/** |
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* @var Node |
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*/ |
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protected $head; |
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/** |
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* Bucket constructor. |
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* @param string $key |
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* @param string $data |
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* @param DateTime|null $date |
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*/ |
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public function __construct(string $key, string $data = null, DateTime $date = null) |
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{ |
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$this->head = new Node($key, $data, $date); |
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} |
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/** |
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* 链表有几个元素 |
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* |
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* @return int |
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*/ |
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public function countNode(): int |
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{ |
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$cur = $this->head; |
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$i = 1; |
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while ($cur->next !== null) { |
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++$i; |
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$cur = $cur->next; |
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} |
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return $i; |
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} |
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/** |
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* 增加节点 |
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* |
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* @param string $key |
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* @param string $data |
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* @param DateTime|null $date |
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* @return Bucket |
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*/ |
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public function addNode(string $key, string $data = null, DateTime $date = null): Bucket |
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{ |
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$cur = $this->head; |
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while ($cur->next !== null) { |
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$cur = $cur->next; |
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} |
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$new = new Node($key, $data, $date); |
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$cur->next = $new; |
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return $this; |
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} |
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/** |
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* 增加节点 |
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* |
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* @param string $key |
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* @param string $data |
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* @param DateTime|null $date |
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* @return Bucket |
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*/ |
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public function putNode(string $key, string $data = null, DateTime $date = null): Bucket |
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{ |
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$cur = $this->head; |
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if ($cur->key === $key) { |
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$cur->data = $data; |
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return $this; |
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} |
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while ($cur->next !== null) { |
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$cur = $cur->next; |
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if ($cur->key === $key) { |
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$cur->data = $data; |
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return $this; |
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} |
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} |
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$new = new Node($key, $data, $date); |
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$cur->next = $new; |
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return $this; |
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} |
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/** |
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* 紧接着插在$noNum后 |
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* |
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* @param string $k |
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* @param string $index |
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* @param string $data |
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* @param DateTime|null $date |
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* @return Bucket |
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*/ |
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public function insertNode(string $k, string $index, string $data = null, DateTime $date = null): Bucket |
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{ |
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$cur = $this->head; |
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$new = new Node($k, $data, $date); |
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if ($cur->key !== $index) { |
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while ($cur->next !== null) { |
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$cur = $cur->next; |
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if ($cur->key === $index) { |
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break; |
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} |
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} |
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} |
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$new->next = $cur->next; |
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$cur->next = $new; |
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return $this; |
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} |
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/** |
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* 删除第$no个节点 |
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* |
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* @param string $key |
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* @return Bucket |
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*/ |
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public function delNode(string $key): Bucket |
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{ |
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$cur = $this->head; |
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if ($cur->key === $key) { |
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$this->head = $cur->next; |
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} |
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while ($cur->next !== null) { |
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if ($cur->next->key === $key) { |
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$cur->next = $cur->next->next; |
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break; |
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} |
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3 |
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$cur = $cur->next; |
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} |
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return $this; |
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} |
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/** |
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140
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* 遍历链表 |
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* |
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* @return Bucket |
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* @throws \Exception |
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*/ |
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3 |
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public function showNode(): Bucket |
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{ |
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$cur = $this->head; |
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while ($cur->next !== null) { |
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$cur = $cur->next; |
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echo $cur->getData() . PHP_EOL; |
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} |
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return $this; |
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} |
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155
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/** |
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* 寻找某节点的值 |
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* |
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* @param string $key |
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* @return string|null |
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* @throws \Exception |
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*/ |
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3 |
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public function find(string $key): ?string |
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{ |
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$node = $this->findNode($key); |
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return $node === null ? null : $node->getData(); |
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} |
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168
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/** |
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169
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* 寻找节点 |
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* |
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* @param string $key |
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* @return Node|null |
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*/ |
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9 |
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public function findNode(string $key): ?Node |
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{ |
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$cur = $this->head; |
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if ($cur->key === $key) { |
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return $cur; |
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} |
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while ($cur->next !== null) { |
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$cur = $cur->next; |
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if ($cur->key === $key) { |
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return $cur; |
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} |
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} |
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return null; |
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} |
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/** |
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* @return bool |
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*/ |
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192
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6 |
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public function isNull(): bool |
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{ |
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return $this->head === null; |
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} |
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} |
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yiranzai /
php-file-cache
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