99 lines
2.1 KiB
PHP
99 lines
2.1 KiB
PHP
<?php
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namespace NoccyLabs\Ipc\Key;
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class FileKey implements KeyInterface
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{
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private $proj;
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private $pathname;
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/**
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* Constructor
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*
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* @param string $pathname
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* @param string $proj
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* @param boolean $create
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*/
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public function __construct(string $pathname, $proj="\0", bool $create = false)
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{
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$this->setPathname($pathname, $create);
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$this->setProjectIdentifier($proj);
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}
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/**
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* Get the pathname used to generate the key
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*
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* @return string
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*/
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public function getPathname():string
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{
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return $this->pathname;
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}
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public function setPathname(string $pathname, bool $create = false)
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{
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if (!file_exists($pathname)) {
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if (!$create) {
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throw new \RuntimeException("Path does not exist: {$pathname}");
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}
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if (!is_dir(dirname($pathname))) {
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throw new \RuntimeException("The directory ".dirname($pathname)." does not exist");
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}
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touch($pathname);
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}
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$this->pathname = $pathname;
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}
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/**
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* Get the project identifier. Not guaranteed to be printable
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*
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* @return string
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*/
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public function getProjectIdentifier():string
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{
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return $this->proj;
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}
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/**
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* Set the project identifier
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*
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* @param string $proj
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* @return void
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*/
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public function setProjectIdentifier(string $proj)
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{
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$this->proj = substr($proj, 0, 1);
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}
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/**
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* Get the key value
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*
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* @return int
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*/
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public function getKey():int
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{
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return ftok($this->pathname, $this->proj);
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}
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/**
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* Clone the FileKey, increasing the project identifier to create a new key for the
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* same file
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*
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* @return void
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*/
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public function __clone()
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{
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$this->proj = chr(ord($this->proj) + 1);
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}
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/**
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* Create printable representation of the key
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*
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* @return string
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*/
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public function __toString()
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{
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return $this->getKey();
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}
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} |