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File / Folder	Size	Action
.	-
CodeCleaner	--	ren
Command	--	ren
Exception	--	ren
ExecutionLoop	--	ren
Formatter	--	ren
Input	--	ren
Output	--	ren
Readline	--	ren
Reflection	--	ren
Sudo	--	ren
TabCompletion	--	ren
Util	--	ren
VarDumper	--	ren
VersionUpdater	--	ren
CodeCleaner.php	11.912KB	edt ren
ConfigPaths.php	9.984KB	edt ren
Configuration.php	55.315KB	edt ren
Context.php	7.715KB	edt ren
ContextAware.php	0.554KB	edt ren
EnvInterface.php	0.433KB	edt ren
ExecutionClosure.php	2.245KB	edt ren
ExecutionLoopClosure.php	2.775KB	edt ren
ParserFactory.php	0.732KB	edt ren
Shell.php	47.331KB	edt ren
Sudo.php	5.479KB	edt ren
SuperglobalsEnv.php	0.605KB	edt ren
SystemEnv.php	0.65KB	edt ren
functions.php	16.709KB	edt ren

<?php

/*
 * This file is part of Psy Shell.
 *
 * (c) 2012-2023 Justin Hileman
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Psy;

/**
 * The Shell execution context.
 *
 * This class encapsulates the current variables, most recent return value and
 * exception, and the current namespace.
 */
class Context
{
    private static $specialNames = ['_', '_e', '__out', '__psysh__', 'this'];

// Include a very limited number of command-scope magic variable names.
    // This might be a bad idea, but future me can sort it out.
    private static $commandScopeNames = [
        '__function', '__method', '__class', '__namespace', '__file', '__line', '__dir',
    ];

private $scopeVariables = [];
    private $commandScopeVariables = [];
    private $returnValue;
    private $lastException;
    private $lastStdout;
    private $boundObject;
    private $boundClass;

/**
     * Get a context variable.
     *
     * @throws \InvalidArgumentException If the variable is not found in the current context
     *
     * @param string $name
     *
     * @return mixed
     */
    public function get(string $name)
    {
        switch ($name) {
            case '_':
                return $this->returnValue;

case '_e':
                if (isset($this->lastException)) {
                    return $this->lastException;
                }
                break;

case '__out':
                if (isset($this->lastStdout)) {
                    return $this->lastStdout;
                }
                break;

case 'this':
                if (isset($this->boundObject)) {
                    return $this->boundObject;
                }
                break;

case '__function':
            case '__method':
            case '__class':
            case '__namespace':
            case '__file':
            case '__line':
            case '__dir':
                if (\array_key_exists($name, $this->commandScopeVariables)) {
                    return $this->commandScopeVariables[$name];
                }
                break;

default:
                if (\array_key_exists($name, $this->scopeVariables)) {
                    return $this->scopeVariables[$name];
                }
                break;
        }

throw new \InvalidArgumentException('Unknown variable: $'.$name);
    }

/**
     * Get all defined variables.
     */
    public function getAll(): array
    {
        return \array_merge($this->scopeVariables, $this->getSpecialVariables());
    }

/**
     * Get all defined magic variables: $_, $_e, $__out, $__class, $__file, etc.
     */
    public function getSpecialVariables(): array
    {
        $vars = [
            '_' => $this->returnValue,
        ];

if (isset($this->lastException)) {
            $vars['_e'] = $this->lastException;
        }

if (isset($this->lastStdout)) {
            $vars['__out'] = $this->lastStdout;
        }

if (isset($this->boundObject)) {
            $vars['this'] = $this->boundObject;
        }

return \array_merge($vars, $this->commandScopeVariables);
    }

/**
     * Set all scope variables.
     *
     * This method does *not* set any of the magic variables: $_, $_e, $__out,
     * $__class, $__file, etc.
     *
     * @param array $vars
     */
    public function setAll(array $vars)
    {
        foreach (self::$specialNames as $key) {
            unset($vars[$key]);
        }

foreach (self::$commandScopeNames as $key) {
            unset($vars[$key]);
        }

$this->scopeVariables = $vars;
    }

/**
     * Set the most recent return value.
     *
     * @param mixed $value
     */
    public function setReturnValue($value)
    {
        $this->returnValue = $value;
    }

/**
     * Get the most recent return value.
     *
     * @return mixed
     */
    public function getReturnValue()
    {
        return $this->returnValue;
    }

/**
     * Set the most recent Exception or Error.
     *
     * @param \Throwable $e
     */
    public function setLastException(\Throwable $e)
    {
        $this->lastException = $e;
    }

/**
     * Get the most recent Exception or Error.
     *
     * @throws \InvalidArgumentException If no Exception has been caught
     *
     * @return \Throwable|null
     */
    public function getLastException()
    {
        if (!isset($this->lastException)) {
            throw new \InvalidArgumentException('No most-recent exception');
        }

return $this->lastException;
    }

/**
     * Set the most recent output from evaluated code.
     *
     * @param string $lastStdout
     */
    public function setLastStdout(string $lastStdout)
    {
        $this->lastStdout = $lastStdout;
    }

/**
     * Get the most recent output from evaluated code.
     *
     * @throws \InvalidArgumentException If no output has happened yet
     *
     * @return string|null
     */
    public function getLastStdout()
    {
        if (!isset($this->lastStdout)) {
            throw new \InvalidArgumentException('No most-recent output');
        }

return $this->lastStdout;
    }

/**
     * Set the bound object ($this variable) for the interactive shell.
     *
     * Note that this unsets the bound class, if any exists.
     *
     * @param object|null $boundObject
     */
    public function setBoundObject($boundObject)
    {
        $this->boundObject = \is_object($boundObject) ? $boundObject : null;
        $this->boundClass = null;
    }

/**
     * Get the bound object ($this variable) for the interactive shell.
     *
     * @return object|null
     */
    public function getBoundObject()
    {
        return $this->boundObject;
    }

/**
     * Set the bound class (self) for the interactive shell.
     *
     * Note that this unsets the bound object, if any exists.
     *
     * @param string|null $boundClass
     */
    public function setBoundClass($boundClass)
    {
        $this->boundClass = (\is_string($boundClass) && $boundClass !== '') ? $boundClass : null;
        $this->boundObject = null;
    }

/**
     * Get the bound class (self) for the interactive shell.
     *
     * @return string|null
     */
    public function getBoundClass()
    {
        return $this->boundClass;
    }

/**
     * Set command-scope magic variables: $__class, $__file, etc.
     *
     * @param array $commandScopeVariables
     */
    public function setCommandScopeVariables(array $commandScopeVariables)
    {
        $vars = [];
        foreach ($commandScopeVariables as $key => $value) {
            // kind of type check
            if (\is_scalar($value) && \in_array($key, self::$commandScopeNames)) {
                $vars[$key] = $value;
            }
        }

$this->commandScopeVariables = $vars;
    }

/**
     * Get command-scope magic variables: $__class, $__file, etc.
     */
    public function getCommandScopeVariables(): array
    {
        return $this->commandScopeVariables;
    }

/**
     * Get unused command-scope magic variables names: __class, __file, etc.
     *
     * This is used by the shell to unset old command-scope variables after a
     * new batch is set.
     *
     * @return array Array of unused variable names
     */
    public function getUnusedCommandScopeVariableNames(): array
    {
        return \array_diff(self::$commandScopeNames, \array_keys($this->commandScopeVariables));
    }

/**
     * Check whether a variable name is a magic variable.
     *
     * @param string $name
     */
    public static function isSpecialVariableName(string $name): bool
    {
        return \in_array($name, self::$specialNames) || \in_array($name, self::$commandScopeNames);
    }
}