Zortje\MVC\Controller\Controller

Complexity

Total Complexity

24

Size/Duplication

Total Lines	281
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	4

Test Coverage

Coverage

23.08%

Importance

Changes	13
Bugs	0	Features	0

10 Methods

Rating	Name	Duplication	Size	Complexity
A	getShortName()	0	4	1
B	setAction()	0	25	6
B	callAction()	0	39	3
A	beforeAction()	0	9	2
A	afterAction()	0	3	1
A	set()	0	4	1
A	getLayoutTemplate()	0	10	2
A	getViewTemplate()	0	10	2
B	setResponseCode()	0	30	5
A	__construct()	0	6	1

<?php
declare(strict_types = 1);

namespace Zortje\MVC\Controller;

use Zortje\MVC\Controller\Exception\ControllerActionNonexistentException;
use Zortje\MVC\Controller\Exception\ControllerActionPrivateInsufficientAuthenticationException;
use Zortje\MVC\Controller\Exception\ControllerActionProtectedInsufficientAuthenticationException;
use Zortje\MVC\Model\User;
use Zortje\MVC\View\Render\HtmlRender;

/**
 * Class Controller
 *
 * @package Zortje\MVC\Controller
 */
class Controller
{

    /**
     * Controller action is publicly accessible
     */
    const ACTION_PUBLIC = 0;

    /**
     * Controller action requires authentication
     * Will redirect to login page if not authenticated
     */
    const ACTION_PROTECTED = 1;

    /**
     * Controller action requires authentication
     * Will result in an 404 if not authenticated
     */
    const ACTION_PRIVATE = 2;

    /**
     * @var array Controller action access rules
     */
    protected $access = [];

    /**
     * @var \PDO PDO
     */
    protected $pdo;

    /**
     * @var string App file path
     */
    protected $appPath;

    /**
     * @var null|User User
     */
    protected $user;

    /**
     * @var string Controller action
     */
    protected $action;

    /**
     * @var array View variables
     */
    protected $variables = [];

    /**
     * @var bool Should render view for controller action
     */
    protected $render = true;

    /**
     * @var string File path for layout template file
     */
    protected $layout;

    /**
     * @var string File path for view template file
     */
    protected $view;

    /**
     * @var array Headers for output
     *
     * @todo JSON content type: `Content-Type: application/javascript; charset=utf-8`
     */
    protected $headers = [
        'content-type' => 'Content-Type: text/html; charset=utf-8'
    ];

    /**
     * @return string Controller name without namespace
     */
    public function getShortName(): string
    {
        return str_replace('Controller', null, (new \ReflectionClass($this))->getShortName());
    }

    /**
     * @param string $action Controller action
     *
     * @throws ControllerActionNonexistentException
     * @throws ControllerActionPrivateInsufficientAuthenticationException
     * @throws ControllerActionProtectedInsufficientAuthenticationException
     */
    public function setAction(string $action)
    {
        /**
         * Check if method exists and that access has been defined
         */
        if (!method_exists($this, $action) || !isset($this->access[$action])) {
            throw new ControllerActionNonexistentException([get_class($this), $action]);
        }

        /**
         * Check controller action access level if user is not authenticated
         */
        if (!$this->user) {
            if ($this->access[$action] === self::ACTION_PRIVATE) {
                throw new ControllerActionPrivateInsufficientAuthenticationException([get_class($this), $action]);
            } elseif ($this->access[$action] === self::ACTION_PROTECTED) {
                throw new ControllerActionProtectedInsufficientAuthenticationException([get_class($this), $action]);
            }
        }

        /**
         * Set controller action
         */
        $this->action = $action;
    }

    /**
     * Call action
     *
     * @return array<string,array|string> Headers and output if render is enabled, otherwise FALSE
     *
     * @throws \LogicException If controller action is not set
     */
    public function callAction(): array
    {
        if (!isset($this->action)) {
            throw new \LogicException('Controller action must be set before being called');
        }

        /**
         * Before controller action hook
         */
        $this->beforeAction();

        /**
         * Call controller action
         */
        $action = $this->action;

        $this->$action();

        /**
         * After controller action hook
         */
        $this->afterAction();

        /**
         * Render view
         */
        if ($this->render) {
            $render = new HtmlRender($this->variables);

            $output = $render->render(['_view' => $this->getViewTemplate(), '_layout' => $this->getLayoutTemplate()]);

            return [
                'headers' => $this->headers,
                'output'  => $output
            ];
        }

        return [];
    }

    /**
     * Before controller action hook
     *
     * Called right before controller action is called
     */
    protected function beforeAction()
    {
        /**
         * Set New Relic transaction name
         */
        if (extension_loaded('newrelic')) {
            newrelic_name_transaction(sprintf('%s/%s', $this->getShortName(), $this->action));
        }
    }

    /**
     * After controller action hook
     *
     * Called right after controller action is called, but before rendering of the view
     */
    protected function afterAction()
    {
    }

    /**
     * Set view variable
     *
     * @param string $variable
     * @param mixed  $value
     */
    protected function set(string $variable, $value)
    {
        $this->variables[$variable] = $value;
    }

    /**
     * Get layout template
     *
     * @return string Layout template file path
     */
    protected function getLayoutTemplate(): string
    {
        $layout = $this->layout;

        if (empty($layout)) {
            $layout = 'View/Layout/default';
        }

        return "{$this->appPath}$layout.layout";
    }

    /**
     * Get view template
     *
     * @return string View template file path
     */
    protected function getViewTemplate(): string
    {
        $view = $this->view;

        if (empty($view)) {
            $view = sprintf('View/%s/%s', $this->getShortName(), $this->action);
        }

        return "{$this->appPath}$view.view";
    }

    /**
     * Set response code
     *
     * Supports 200 OK, 403 Forbidden, 404 Not Found & 500 Internal Server Error
     *
     * @param int $code HTTP response code
     *
     * @throws \InvalidArgumentException If unsupported code is provided
     */
    protected function setResponseCode(int $code)
    {
        switch ($code) {
            case 200:
                $text = 'OK';
                break;

            case 403:
                $text = 'Forbidden';
                break;

            case 404:
                $text = 'Not Found';
                break;

            case 500:
                $text = 'Internal Server Error';
                break;

            default:
                throw new \InvalidArgumentException("HTTP status '$code' is not implemented");
                break;

break; does not seem to be reachable.

        }

        /**
         * Set header
         */
        // @todo test that running response code multiple times only results in one response code header
        $this->headers['response_code'] = "HTTP/1.1 $code $text";
    }

    /**
     * @param \PDO      $pdo
     * @param string    $appPath
     * @param null|User $user
     */
    public function __construct(\PDO $pdo, string $appPath, User $user = null)
    {
        $this->pdo     = $pdo;
        $this->appPath = $appPath;
        $this->user    = $user;
    }
}