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Daniele Alessandri
4b47639f9e
Some notable exceptions are EVAL and ECHO because having these names as class names would raise a syntax error.
82 lines
1.9 KiB
PHP
82 lines
1.9 KiB
PHP
<?php
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/*
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* This file is part of the Predis package.
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*
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* (c) Daniele Alessandri <suppakilla@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Predis\Command;
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use Predis\Command\Redis\EVALSHA;
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/**
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* Base class used to implement an higher level abstraction for commands based
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* on Lua scripting with EVAL and EVALSHA.
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*
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* @link http://redis.io/commands/eval
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*
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* @author Daniele Alessandri <suppakilla@gmail.com>
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*/
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abstract class ScriptCommand extends EVALSHA
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{
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/**
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* Gets the body of a Lua script.
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*
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* @return string
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*/
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abstract public function getScript();
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/**
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* Specifies the number of arguments that should be considered as keys.
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*
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* The default behaviour for the base class is to return 0 to indicate that
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* all the elements of the arguments array should be considered as keys, but
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* subclasses can enforce a static number of keys.
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*
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* @return int
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*/
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protected function getKeysCount()
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{
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return 0;
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}
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/**
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* Returns the elements from the arguments that are identified as keys.
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*
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* @return array
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*/
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public function getKeys()
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{
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return array_slice($this->getArguments(), 2, $this->getKeysCount());
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}
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/**
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* {@inheritdoc}
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*/
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public function setArguments(array $arguments)
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{
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if (($numkeys = $this->getKeysCount()) && $numkeys < 0) {
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$numkeys = count($arguments) + $numkeys;
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}
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$arguments = array_merge(array(sha1($this->getScript()), (int) $numkeys), $arguments);
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parent::setArguments($arguments);
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}
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/**
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* @return array
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*/
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public function getEvalArguments()
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{
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$arguments = $this->getArguments();
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$arguments[0] = $this->getScript();
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return $arguments;
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}
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}
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