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modules/ps_checkout/vendor/league/tactician/composer.json

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+{
+    "name":        "league/tactician",
+    "description": "A small, flexible command bus. Handy for building service layers.",
+    "keywords":    ["command", "command bus", "service layer"],
+    "license":     "MIT",
+    "authors": [
+        {
+            "name": "Ross Tuck",
+            "homepage": "http://tactician.thephpleague.com"
+        }
+    ],
+    "require": {
+        "php":  ">=5.5"
+    },
+    "require-dev": {
+        "mockery/mockery": "~0.9",
+        "phpunit/phpunit": "^4.8.35",
+        "squizlabs/php_codesniffer": "~2.3"
+    },
+    "autoload": {
+        "psr-4": {
+            "League\\Tactician\\": "src"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "League\\Tactician\\Tests\\": "tests/"
+        },
+        "files": [
+            "tests/Fixtures/Command/CommandWithoutNamespace.php"
+        ]
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "2.0-dev"
+        }
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/CommandBus.php

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+<?php
+
+namespace League\Tactician;
+
+use League\Tactician\Exception\InvalidCommandException;
+use League\Tactician\Exception\InvalidMiddlewareException;
+
+/**
+ * Receives a command and sends it through a chain of middleware for processing.
+ *
+ * @final
+ */
+class CommandBus
+{
+    /**
+     * @var callable
+     */
+    private $middlewareChain;
+
+    /**
+     * @param Middleware[] $middleware
+     */
+    public function __construct(array $middleware)
+    {
+        $this->middlewareChain = $this->createExecutionChain($middleware);
+    }
+
+    /**
+     * Executes the given command and optionally returns a value
+     *
+     * @param object $command
+     *
+     * @return mixed
+     */
+    public function handle($command)
+    {
+        if (!is_object($command)) {
+            throw InvalidCommandException::forUnknownValue($command);
+        }
+
+        $middlewareChain = $this->middlewareChain;
+        return $middlewareChain($command);
+    }
+
+    /**
+     * @param Middleware[] $middlewareList
+     *
+     * @return callable
+     */
+    private function createExecutionChain($middlewareList)
+    {
+        $lastCallable = function () {
+            // the final callable is a no-op
+        };
+
+        while ($middleware = array_pop($middlewareList)) {
+            if (! $middleware instanceof Middleware) {
+                throw InvalidMiddlewareException::forMiddleware($middleware);
+            }
+
+            $lastCallable = function ($command) use ($middleware, $lastCallable) {
+                return $middleware->execute($command, $lastCallable);
+            };
+        }
+
+        return $lastCallable;
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Exception/CanNotDetermineCommandNameException.php

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+<?php
+
+namespace League\Tactician\Exception;
+
+/**
+ * Thrown when a CommandNameExtractor cannot determine the command's name
+ */
+class CanNotDetermineCommandNameException extends \RuntimeException implements Exception
+{
+    /**
+     * @var mixed
+     */
+    private $command;
+
+    /**
+     * @param mixed $command
+     *
+     * @return static
+     */
+    public static function forCommand($command)
+    {
+        $type =  is_object($command) ? get_class($command) : gettype($command);
+
+        $exception = new static('Could not determine command name of ' . $type);
+        $exception->command = $command;
+
+        return $exception;
+    }
+
+    /**
+     * Returns the command that could not be invoked
+     *
+     * @return mixed
+     */
+    public function getCommand()
+    {
+        return $this->command;
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Exception/CanNotInvokeHandlerException.php

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+<?php
+
+namespace League\Tactician\Exception;
+
+/**
+ * Thrown when a specific handler object can not be used on a command object.
+ *
+ * The most common reason is the receiving method is missing or incorrectly
+ * named.
+ */
+class CanNotInvokeHandlerException extends \BadMethodCallException implements Exception
+{
+    /**
+     * @var mixed
+     */
+    private $command;
+
+    /**
+     * @param mixed $command
+     * @param string $reason
+     *
+     * @return static
+     */
+    public static function forCommand($command, $reason)
+    {
+        $type =  is_object($command) ? get_class($command) : gettype($command);
+
+        $exception = new static(
+            'Could not invoke handler for command ' . $type .
+            ' for reason: ' . $reason
+        );
+        $exception->command = $command;
+
+        return $exception;
+    }
+
+    /**
+     * Returns the command that could not be invoked
+     *
+     * @return mixed
+     */
+    public function getCommand()
+    {
+        return $this->command;
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Exception/Exception.php

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+<?php
+
+namespace League\Tactician\Exception;
+
+/**
+ * Marker interface for all Tactician exceptions
+ */
+interface Exception
+{
+}

modules/ps_checkout/vendor/league/tactician/src/Exception/InvalidCommandException.php

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+<?php
+
+namespace League\Tactician\Exception;
+
+/**
+ * Thrown when the command bus is given an non-object to use as a command.
+ */
+class InvalidCommandException extends \RuntimeException implements Exception
+{
+    /**
+     * @var mixed
+     */
+    private $invalidCommand;
+
+    /**
+     * @param mixed $invalidCommand
+     *
+     * @return static
+     */
+    public static function forUnknownValue($invalidCommand)
+    {
+        $exception = new static(
+            'Commands must be an object but the value given was of type: ' . gettype($invalidCommand)
+        );
+        $exception->invalidCommand = $invalidCommand;
+
+        return $exception;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function getInvalidCommand()
+    {
+        return $this->invalidCommand;
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Exception/InvalidMiddlewareException.php

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+<?php
+
+namespace League\Tactician\Exception;
+
+/**
+ * Thrown when the CommandBus was instantiated with an invalid middleware object
+ */
+class InvalidMiddlewareException extends \InvalidArgumentException implements Exception
+{
+    public static function forMiddleware($middleware)
+    {
+        $name = is_object($middleware) ? get_class($middleware) : gettype($middleware);
+        $message = sprintf(
+            'Cannot add "%s" to middleware chain as it does not implement the Middleware interface.',
+            $name
+        );
+        return new static($message);
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Exception/MissingHandlerException.php

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+<?php
+
+namespace League\Tactician\Exception;
+
+/**
+ * No handler could be found for the given command.
+ */
+class MissingHandlerException extends \OutOfBoundsException implements Exception
+{
+    /**
+     * @var string
+     */
+    private $commandName;
+
+    /**
+     * @param string $commandName
+     *
+     * @return static
+     */
+    public static function forCommand($commandName)
+    {
+        $exception = new static('Missing handler for command ' . $commandName);
+        $exception->commandName = $commandName;
+
+        return $exception;
+    }
+
+    /**
+     * @return string
+     */
+    public function getCommandName()
+    {
+        return $this->commandName;
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/CommandHandlerMiddleware.php

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+<?php
+
+namespace League\Tactician\Handler;
+
+use League\Tactician\Middleware;
+use League\Tactician\Exception\CanNotInvokeHandlerException;
+use League\Tactician\Handler\CommandNameExtractor\CommandNameExtractor;
+use League\Tactician\Handler\Locator\HandlerLocator;
+use League\Tactician\Handler\MethodNameInflector\MethodNameInflector;
+
+/**
+ * The "core" CommandBus. Locates the appropriate handler and executes command.
+ */
+class CommandHandlerMiddleware implements Middleware
+{
+    /**
+     * @var CommandNameExtractor
+     */
+    private $commandNameExtractor;
+
+    /**
+     * @var HandlerLocator
+     */
+    private $handlerLocator;
+
+    /**
+     * @var MethodNameInflector
+     */
+    private $methodNameInflector;
+
+    /**
+     * @param CommandNameExtractor $commandNameExtractor
+     * @param HandlerLocator       $handlerLocator
+     * @param MethodNameInflector  $methodNameInflector
+     */
+    public function __construct(
+        CommandNameExtractor $commandNameExtractor,
+        HandlerLocator $handlerLocator,
+        MethodNameInflector $methodNameInflector
+    ) {
+        $this->commandNameExtractor = $commandNameExtractor;
+        $this->handlerLocator = $handlerLocator;
+        $this->methodNameInflector = $methodNameInflector;
+    }
+
+    /**
+     * Executes a command and optionally returns a value
+     *
+     * @param object   $command
+     * @param callable $next
+     *
+     * @return mixed
+     *
+     * @throws CanNotInvokeHandlerException
+     */
+    public function execute($command, callable $next)
+    {
+        $commandName = $this->commandNameExtractor->extract($command);
+        $handler = $this->handlerLocator->getHandlerForCommand($commandName);
+        $methodName = $this->methodNameInflector->inflect($command, $handler);
+
+        // is_callable is used here instead of method_exists, as method_exists
+        // will fail when given a handler that relies on __call.
+        if (!is_callable([$handler, $methodName])) {
+            throw CanNotInvokeHandlerException::forCommand(
+                $command,
+                "Method '{$methodName}' does not exist on handler"
+            );
+        }
+
+        return $handler->{$methodName}($command);
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/CommandNameExtractor/ClassNameExtractor.php

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+<?php
+
+namespace League\Tactician\Handler\CommandNameExtractor;
+
+/**
+ * Extract the name from the class
+ */
+class ClassNameExtractor implements CommandNameExtractor
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function extract($command)
+    {
+        return get_class($command);
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/CommandNameExtractor/CommandNameExtractor.php

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+<?php
+
+namespace League\Tactician\Handler\CommandNameExtractor;
+
+use League\Tactician\Exception\CanNotDetermineCommandNameException;
+
+/**
+ * Extract the name from a command so that the name can be determined
+ * by the context better than simply the class name
+ */
+interface CommandNameExtractor
+{
+    /**
+     * Extract the name from a command
+     *
+     * @param object $command
+     *
+     * @return string
+     *
+     * @throws CannotDetermineCommandNameException
+     */
+    public function extract($command);
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/Locator/CallableLocator.php

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+<?php
+namespace League\Tactician\Handler\Locator;
+
+use League\Tactician\Exception\MissingHandlerException;
+
+/**
+ * This locator loads Handlers from a provided callable.
+ *
+ * At first glance, this might seem fairly useless but it's actually very
+ * useful to encapsulate DI containers without having to write a custom adapter
+ * for each one.
+ *
+ * Let's say you have a Symfony container or similar that works via a 'get'
+ * method. You can pass in an array style callable such as:
+ *
+ *     $locator = new CallableLocator([$container, 'get'])
+ *
+ * This is easy to set up and will now automatically pipe the command name
+ * straight through to the $container->get() method without having to write
+ * the custom locator.
+ *
+ * Naturally, you can also pass in closures for further behavior tweaks.
+ */
+class CallableLocator implements HandlerLocator
+{
+    /**
+     * @var callable
+     */
+    private $callable;
+
+    /**
+     * @param callable $callable
+     */
+    public function __construct(callable $callable)
+    {
+        $this->callable = $callable;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getHandlerForCommand($commandName)
+    {
+        $callable = $this->callable;
+        $handler = $callable($commandName);
+
+        // Odds are the callable threw an exception but it always pays to check
+        if ($handler === null) {
+            throw MissingHandlerException::forCommand($commandName);
+        }
+
+        return $handler;
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/Locator/HandlerLocator.php

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+<?php
+
+namespace League\Tactician\Handler\Locator;
+
+use League\Tactician\Exception\MissingHandlerException;
+
+/**
+ * Service locator for handler objects
+ *
+ * This interface is often a wrapper around your frameworks dependency
+ * injection container or just maps command names to handler names on disk somehow.
+ */
+interface HandlerLocator
+{
+    /**
+     * Retrieves the handler for a specified command
+     *
+     * @param string $commandName
+     *
+     * @return object
+     *
+     * @throws MissingHandlerException
+     */
+    public function getHandlerForCommand($commandName);
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/Locator/InMemoryLocator.php

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+<?php
+
+namespace League\Tactician\Handler\Locator;
+
+use League\Tactician\Exception\MissingHandlerException;
+
+/**
+ * Fetch handler instances from an in-memory collection.
+ *
+ * This locator allows you to bind a handler object to receive commands of a
+ * certain class name. For example:
+ *
+ *      // Wire everything together
+ *      $myHandler = new TaskAddedHandler($dependency1, $dependency2);
+ *      $inMemoryLocator->addHandler($myHandler, 'My\TaskAddedCommand');
+ *
+ *      // Returns $myHandler
+ *      $inMemoryLocator->getHandlerForCommand('My\TaskAddedCommand');
+ */
+class InMemoryLocator implements HandlerLocator
+{
+    /**
+     * @var object[]
+     */
+    protected $handlers = [];
+
+    /**
+     * @param array $commandClassToHandlerMap
+     */
+    public function __construct(array $commandClassToHandlerMap = [])
+    {
+        $this->addHandlers($commandClassToHandlerMap);
+    }
+
+    /**
+     * Bind a handler instance to receive all commands with a certain class
+     *
+     * @param object $handler Handler to receive class
+     * @param string $commandClassName Command class e.g. "My\TaskAddedCommand"
+     */
+    public function addHandler($handler, $commandClassName)
+    {
+        $this->handlers[$commandClassName] = $handler;
+    }
+
+    /**
+     * Allows you to add multiple handlers at once.
+     *
+     * The map should be an array in the format of:
+     *  [
+     *      AddTaskCommand::class      => $someHandlerInstance,
+     *      CompleteTaskCommand::class => $someHandlerInstance,
+     *  ]
+     *
+     * @param array $commandClassToHandlerMap
+     */
+    protected function addHandlers(array $commandClassToHandlerMap)
+    {
+        foreach ($commandClassToHandlerMap as $commandClass => $handler) {
+            $this->addHandler($handler, $commandClass);
+        }
+    }
+
+    /**
+     * Returns the handler bound to the command's class name.
+     *
+     * @param string $commandName
+     *
+     * @return object
+     */
+    public function getHandlerForCommand($commandName)
+    {
+        if (!isset($this->handlers[$commandName])) {
+            throw MissingHandlerException::forCommand($commandName);
+        }
+
+        return $this->handlers[$commandName];
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/MethodNameInflector/ClassNameInflector.php

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+<?php
+
+namespace League\Tactician\Handler\MethodNameInflector;
+
+/**
+ * Assumes the method is only the last portion of the class name.
+ *
+ * Examples:
+ *  - \MyGlobalCommand    => $handler->myGlobalCommand()
+ *  - \My\App\CreateUser  => $handler->createUser()
+ */
+class ClassNameInflector implements MethodNameInflector
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function inflect($command, $commandHandler)
+    {
+        $commandName = get_class($command);
+
+        // If class name has a namespace separator, only take last portion
+        if (strpos($commandName, '\\') !== false) {
+            $commandName = substr($commandName, strrpos($commandName, '\\') + 1);
+        }
+
+        return strtolower($commandName[0]) . substr($commandName, 1);
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/MethodNameInflector/HandleClassNameInflector.php

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+<?php
+
+namespace League\Tactician\Handler\MethodNameInflector;
+
+/**
+ * Assumes the method is handle + the last portion of the class name.
+ *
+ * Examples:
+ *  - \MyGlobalCommand              => $handler->handleMyGlobalCommand()
+ *  - \My\App\TaskCompletedCommand  => $handler->handleTaskCompletedCommand()
+ */
+class HandleClassNameInflector extends ClassNameInflector
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function inflect($command, $commandHandler)
+    {
+        $commandName = parent::inflect($command, $commandHandler);
+
+        return 'handle' . ucfirst($commandName);
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/MethodNameInflector/HandleClassNameWithoutSuffixInflector.php

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+<?php
+namespace League\Tactician\Handler\MethodNameInflector;
+
+/**
+ * Returns a method name that is handle + the last portion of the class name
+ * but also without a given suffix, typically "Command". This allows you to
+ * handle multiple commands on a single object but with slightly less annoying
+ * method names.
+ *
+ * The string removal is case sensitive.
+ *
+ * Examples:
+ *  - \CompleteTaskCommand     => $handler->handleCompleteTask()
+ *  - \My\App\DoThingCommand   => $handler->handleDoThing()
+ */
+class HandleClassNameWithoutSuffixInflector extends HandleClassNameInflector
+{
+    /**
+     * @var string
+     */
+    private $suffix;
+
+    /**
+     * @var int
+     */
+    private $suffixLength;
+
+    /**
+     * @param string $suffix The string to remove from end of each class name
+     */
+    public function __construct($suffix = 'Command')
+    {
+        $this->suffix = $suffix;
+        $this->suffixLength = strlen($suffix);
+    }
+
+    /**
+     * @param object $command
+     * @param object $commandHandler
+     * @return string
+     */
+    public function inflect($command, $commandHandler)
+    {
+        $methodName = parent::inflect($command, $commandHandler);
+
+        if (substr($methodName, $this->suffixLength * -1) !== $this->suffix) {
+            return $methodName;
+        }
+
+        return substr($methodName, 0, strlen($methodName) - $this->suffixLength);
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/MethodNameInflector/HandleInflector.php

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+<?php
+
+namespace League\Tactician\Handler\MethodNameInflector;
+
+/**
+ * Handle command by calling the "handle" method.
+ */
+class HandleInflector implements MethodNameInflector
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function inflect($command, $commandHandler)
+    {
+        return 'handle';
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/MethodNameInflector/InvokeInflector.php

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+<?php
+
+namespace League\Tactician\Handler\MethodNameInflector;
+
+/**
+ * Handle command by calling the __invoke magic method. Handy for single
+ * use classes or closures.
+ */
+class InvokeInflector implements MethodNameInflector
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function inflect($command, $commandHandler)
+    {
+        return '__invoke';
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Handler/MethodNameInflector/MethodNameInflector.php

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+<?php
+
+namespace League\Tactician\Handler\MethodNameInflector;
+
+/**
+ * Deduce the method name to call on the command handler based on the command
+ * and handler instances.
+ */
+interface MethodNameInflector
+{
+    /**
+     * Return the method name to call on the command handler and return it.
+     *
+     * @param object $command
+     * @param object $commandHandler
+     *
+     * @return string
+     */
+    public function inflect($command, $commandHandler);
+}

modules/ps_checkout/vendor/league/tactician/src/Middleware.php

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+<?php
+
+namespace League\Tactician;
+
+/**
+ * Middleware are the plugins of Tactician. They receive each command that's
+ * given to the CommandBus and can take any action they choose. Middleware can
+ * continue the Command processing by passing the command they receive to the
+ * $next callable, which is essentially the "next" Middleware in the chain.
+ *
+ * Depending on where they invoke the $next callable, Middleware can execute
+ * their custom logic before or after the Command is handled. They can also
+ * modify, log, or replace the command they receive. The sky's the limit.
+ */
+interface Middleware
+{
+    /**
+     * @param object   $command
+     * @param callable $next
+     *
+     * @return mixed
+     */
+    public function execute($command, callable $next);
+}

modules/ps_checkout/vendor/league/tactician/src/Plugins/LockingMiddleware.php

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+<?php
+
+namespace League\Tactician\Plugins;
+
+use League\Tactician\Middleware;
+
+/**
+ * If another command is already being executed, locks the command bus and
+ * queues the new incoming commands until the first has completed.
+ */
+class LockingMiddleware implements Middleware
+{
+    /**
+     * @var bool
+     */
+    private $isExecuting;
+
+    /**
+     * @var callable[]
+     */
+    private $queue = [];
+
+    /**
+     * Execute the given command... after other running commands are complete.
+     *
+     * @param object   $command
+     * @param callable $next
+     *
+     * @throws \Exception
+     *
+     * @return mixed|void
+     */
+    public function execute($command, callable $next)
+    {
+        $this->queue[] = function () use ($command, $next) {
+            return $next($command);
+        };
+
+        if ($this->isExecuting) {
+            return;
+        }
+        $this->isExecuting = true;
+
+        try {
+            $returnValue = $this->executeQueuedJobs();
+        } catch (\Exception $e) {
+            $this->isExecuting = false;
+            $this->queue = [];
+            throw $e;
+        }
+
+        $this->isExecuting = false;
+        return $returnValue;
+    }
+
+    /**
+     * Process any pending commands in the queue. If multiple, jobs are in the
+     * queue, only the first return value is given back.
+     *
+     * @return mixed
+     */
+    protected function executeQueuedJobs()
+    {
+        $returnValues = [];
+        while ($resumeCommand = array_shift($this->queue)) {
+            $returnValues[] = $resumeCommand();
+        }
+
+        return array_shift($returnValues);
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Plugins/NamedCommand/NamedCommand.php

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+<?php
+
+namespace League\Tactician\Plugins\NamedCommand;
+
+/**
+ * Exposes a name for a command
+ */
+interface NamedCommand
+{
+    /**
+     * Returns the name of the command
+     *
+     * @return string
+     */
+    public function getCommandName();
+}

modules/ps_checkout/vendor/league/tactician/src/Plugins/NamedCommand/NamedCommandExtractor.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace League\Tactician\Plugins\NamedCommand;
+
+use League\Tactician\Exception\CanNotDetermineCommandNameException;
+use League\Tactician\Handler\CommandNameExtractor\CommandNameExtractor;
+
+/**
+ * Extract the name from a NamedCommand
+ */
+class NamedCommandExtractor implements CommandNameExtractor
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function extract($command)
+    {
+        if ($command instanceof NamedCommand) {
+            return $command->getCommandName();
+        }
+
+        throw CanNotDetermineCommandNameException::forCommand($command);
+    }
+}

modules/ps_checkout/vendor/league/tactician/src/Setup/QuickStart.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace League\Tactician\Setup;
+
+use League\Tactician\CommandBus;
+use League\Tactician\Handler\CommandNameExtractor\ClassNameExtractor;
+use League\Tactician\Handler\Locator\InMemoryLocator;
+use League\Tactician\Handler\MethodNameInflector\HandleInflector;
+use League\Tactician\Handler\CommandHandlerMiddleware;
+use League\Tactician\Plugins\LockingMiddleware;
+
+/**
+ * Builds a working command bus with minimum fuss.
+ *
+ * Currently, the default setup is:
+ * - Handlers instances in memory
+ * - The expected handler method is always "handle"
+ * - And only one command at a time can be executed.
+ *
+ * This factory is a decent place to start trying out Tactician but you're
+ * better off moving to a custom setup or a framework bundle/module/provider in
+ * the long run. As you can see, it's not difficult. :)
+ */
+class QuickStart
+{
+    /**
+     * Creates a default CommandBus that you can get started with.
+     *
+     * @param array $commandToHandlerMap
+     *
+     * @return CommandBus
+     */
+    public static function create($commandToHandlerMap)
+    {
+        $handlerMiddleware = new CommandHandlerMiddleware(
+            new ClassNameExtractor(),
+            new InMemoryLocator($commandToHandlerMap),
+            new HandleInflector()
+        );
+
+        $lockingMiddleware = new LockingMiddleware();
+
+        return new CommandBus([$lockingMiddleware, $handlerMiddleware]);
+    }
+}