Глава 45: redis

redis/config.php

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+<?php
+$redis = new Redis();
+$redis->connect('127.0.0.1', 6379);
+$redis->select(1);

redis/keys.php

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+<?php
+require_once 'config.php';
+
+echo '<pre>';
+print_r($redis->keys('*'));
+echo '</pre>';

redis/methods.php

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+<?php
+require_once 'config.php';
+
+// Установка/извлечение ключа
+$redis->set('key', 'value');
+echo $redis->get('key'); // value
+echo '<br />';
+
+// Установка ключа на 10 мс
+$redis->set('hello', 'world', 10);
+echo $redis->get('hello'); // world
+echo '<br />';
+
+// Установка сразу нескольких ключей
+$redis->mSet(['fst' => 'первый', 'snd' => 'второй']);
+echo $redis->get('snd'); // второй
+echo '<br />';
+
+if ($redis->exists('fst')) {
+    echo $redis->get('fst'); // первый
+}

redis/mget.php

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+<?php
+require_once 'config.php';
+
+$keys = $redis->keys('*');
+
+echo '<pre>';
+print_r($redis->mGet($keys));
+echo '</pre>';

redis/mvc/controllers/controller.php

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+<?php
+namespace MVC\Controllers;
+
+class Controller
+{
+    public string $path;
+    public Router $router;
+    public object $model;
+
+    public function __construct(string $path)
+    {
+        $this->path = $path;
+        $this->router = Router::parse($path);
+        $class = 'MVC\\Models\\' . ucfirst($this->router->model);
+        $this->model = new $class();
+        if($this->router->id) {
+            $this->model = $this->model->collection[$this->router->id];
+        }
+    }
+
+    public function render() : string
+    {
+        $class = get_class($this->model);
+        $class = substr($class, strrpos($class, '\\') + 1);
+        $decorator = \MVC\Decorators\DecoratorFactory::create(
+            $class,
+            $this->model);
+        $view = \MVC\Views\ViewFactory::create(
+            $this->router->ext,
+            $class,
+            $decorator);
+
+        return $view->render();
+    }
+}

redis/mvc/controllers/controllercache.php

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+<?php
+namespace MVC\Controllers;
+
+class ControllerCache
+{
+    public string $path;
+    private string $class;
+    private Router $router;
+    private object $model;
+    private object $redis;
+
+    public function __construct(string $path, object $redis)
+    {
+        $this->path = $path;
+        $this->redis = $redis;
+    }
+
+    public function render() : string
+    {
+        $cache = $this->redis->get($this->path);
+        if (!$cache) {
+            $decorator = \MVC\Decorators\DecoratorFactory::create(
+                $this->getClass(),
+                $this->getModel());
+            $view = \MVC\Views\ViewFactory::create(
+                $this->getRouter()->ext,
+                $this->getClass(),
+                $decorator);
+            $cache = $view->render();
+            $this->redis->set($this->path, $cache);
+        }
+
+        return $cache;
+    }
+
+    private function getClass() : string
+    {
+        if (empty($this->class)) {
+            $class = get_class($this->getModel());
+            $this->class = substr($class, strrpos($class, '\\') + 1);
+        }
+
+        return $this->class;
+    }
+
+    private function getRouter() : Router
+    {
+        if (empty($this->router)) {
+            $this->router = Router::parse($this->path);
+        }
+
+        return $this->router;
+    }
+
+    private function getModel() : object
+    {
+        if (empty($this->model)) {
+            $class = 'MVC\\Models\\' . ucfirst($this->getRouter()->model);
+            $this->model = new $class();
+            if ($this->getRouter()->id) {
+                $this->model = $this->model->collection[$this->getRouter()->id];
+            }
+        }
+
+        return $this->model;
+    }
+}

redis/mvc/controllers/controllerlazy.php

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+<?php
+namespace MVC\Controllers;
+
+class ControllerLazy
+{
+    public string $path;
+    private string $class;
+    private Router $router;
+    private object $model;
+
+    public function __construct(string $path)
+    {
+        $this->path = $path;
+    }
+
+    public function render() : string
+    {
+        $decorator = \MVC\Decorators\DecoratorFactory::create(
+            $this->getClass(),
+            $this->getModel());
+        $view = \MVC\Views\ViewFactory::create(
+            $this->getRouter()->ext,
+            $this->getClass(),
+            $decorator);
+
+        return $view->render();
+    }
+
+    private function getClass() : string
+    {
+        if (empty($this->class)) {
+            $class = get_class($this->getModel());
+            $this->class = substr($class, strrpos($class, '\\') + 1);
+        }
+
+        return $this->class;
+    }
+
+    private function getRouter() : Router
+    {
+        if (empty($this->router)) {
+            $this->router = Router::parse($this->path);
+        }
+
+        return $this->router;
+    }
+
+    private function getModel() : object
+    {
+        if (empty($this->model)) {
+            $class = 'MVC\\Models\\' . ucfirst($this->getRouter()->model);
+            $this->model = new $class();
+            if ($this->getRouter()->id) {
+                $this->model = $this->model->collection[$this->getRouter()->id];
+            }
+        }
+
+        return $this->model;
+    }
+}

redis/mvc/controllers/router.php

@@ -0,0 +1,26 @@
+<?php
+namespace MVC\Controllers;
+
+class Router
+{
+    public string $model;
+    public ?string $ext;
+    public ?int $id;
+
+    public static function parse(string $path) : Router
+    {
+        list($path, $ext) = explode('.', $path);
+        $arr = explode('/', $path);
+        return new self($arr[0], $ext, count($arr) > 1 ? $arr[1] : null);
+    }
+
+    private function __construct(
+        string $model,
+        ?string $ext = null,
+        ?int $id = null)
+    {
+        $this->model = $model;
+        $this->ext = $ext;
+        $this->id = $id;
+    }
+}

redis/mvc/decorators/decoratorfactory.php

@@ -0,0 +1,15 @@
+<?php
+namespace MVC\Decorators;
+
+abstract class DecoratorFactory
+{
+    public static function create(string $class, object $model)
+    {
+        $cls = 'MVC\\Decorators\\' . ucfirst($class) . 'Decorator';
+        return new $cls($model);
+    }
+
+    abstract public function title() : string;
+    abstract public function body() : string;
+    abstract public function items() : string;
+}

redis/mvc/decorators/userdecorator.php

@@ -0,0 +1,32 @@
+<?php
+namespace MVC\Decorators;
+
+class UserDecorator extends DecoratorFactory
+{
+    public $user;
+
+    public function __construct(\MVC\Models\User $user)
+    {
+        $this->user = $user;
+    }
+
+    public function title() : string
+    {
+       return implode(' ', [$this->user->first_name, $this->user->last_name]);
+    }
+
+    public function body() : string
+    {
+        return '<strong>' . htmlspecialchars($this->title()) . '</strong> '.
+               '(' . htmlspecialchars($this->user->email) . ')';
+
+    }
+
+    public function items() : string
+    {
+        return '<item>'.
+               '<title>' . htmlspecialchars($this->title()) . '</title>' .
+               '<email>' . htmlspecialchars($this->user->email) . '</email>'.
+               '</item>';
+    }
+}

redis/mvc/decorators/usersdecorator.php

@@ -0,0 +1,45 @@
+<?php
+namespace MVC\Decorators;
+
+class UsersDecorator extends DecoratorFactory
+{
+    public $users;
+
+    public function __construct(\MVC\Models\Users $users)
+    {
+        $this->users = $users;
+    }
+
+    public function title() : string
+    {
+       return 'Пользователи';
+    }
+
+    public function collection_render(
+        callable $call,
+        string $separator = '<br />') : string
+    {
+        return implode(
+                   $separator,
+                   array_map($call, $this->users->collection)
+               );
+    }
+
+    public function body() : string
+    {
+        return $this->collection_render(
+            function($item){
+                $decorated_item = new UserDecorator($item);
+                return $decorated_item->body();
+            });
+    }
+
+    public function items() : string
+    {
+        return $this->collection_render(
+            function($item){
+                $decorated_item = new UserDecorator($item);
+                return $decorated_item->items();
+            }, '');
+    }
+}

redis/mvc/models/user.php

@@ -0,0 +1,11 @@
+<?php
+namespace MVC\Models;
+
+class User
+{
+    public function __construct(
+        public string $email,
+        private string $password,
+        public ?string $first_name = null,
+        public ?string $last_name = null) {}
+}

redis/mvc/models/users.php

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+<?php
+namespace MVC\Models;
+
+class Users
+{
+    public $collection;
+
+    public function __construct(public ?array $users = null)
+    {
+        $users ??= [
+            new User(
+                 'dmitry.koterov@gmail.com',
+                 'password',
+                 'Дмитрий',
+                 'Котеров'),
+            new User(
+                 'igorsimdyanov@gmail.com',
+                 'password',
+                 'Игорь',
+                 'Симдянов')
+        ];
+        $this->collection = $users;
+    }
+}

redis/mvc/views/htmlview.php

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+<?php
+namespace MVC\Views;
+
+class HtmlView extends ViewFactory
+{
+    const LAYOUT = <<<HTML
+    <!DOCTYPE html>
+    <html lang="ru">
+    <head>
+      <title>{{{title}}}</title>
+      <meta charset='utf-8' />
+    </head>
+    <body>{{{body}}}</body>
+    </html>
+HTML;
+
+    protected $replacements;
+
+    public function __construct(object $decorator)
+    {
+        $this->replacements = [
+            '{{{title}}}' => $decorator->title(),
+            '{{{body}}}' => $decorator->body()
+        ];
+    }
+
+    public function render() : string
+    {
+        return str_replace(
+                   array_keys($this->replacements),
+                   array_values($this->replacements),
+                   self::LAYOUT);
+    }
+}

redis/mvc/views/rssview.php

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+<?php
+namespace MVC\Views;
+
+class RssView extends ViewFactory
+{
+    const LAYOUT = <<<HTML
+      <?xml version="1.0" encoding="UTF-8"?>
+      <rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" />
+      <channel>
+        <title>{{{title}}}</title>
+        <link>http://example.com/</link>
+        {{{items}}}
+      </channel>
+    </rss>
+HTML;
+
+    protected $replacements;
+
+    public function __construct(object $decorator)
+    {
+        $this->replacements = [
+            '{{{title}}}' => $decorator->title(),
+            '{{{items}}}' => $decorator->items()
+        ];
+    }
+
+    public function render() : string
+    {
+        return str_replace(
+                   array_keys($this->replacements),
+                   array_values($this->replacements),
+                   self::LAYOUT);
+    }
+}

redis/mvc/views/userhtmlview.php

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+<?php
+namespace MVC\Views;
+
+class UserHtmlView extends HtmlView {}

redis/mvc/views/userrssview.php

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+<?php
+namespace MVC\Views;
+
+class UserRssView extends RssView {}

redis/mvc/views/usershtmlview.php

@@ -0,0 +1,4 @@
+<?php
+namespace MVC\Views;
+
+class UsersHtmlView extends HtmlView {}

redis/mvc/views/usersrssview.php

@@ -0,0 +1,4 @@
+<?php
+namespace MVC\Views;
+
+class UsersRssView extends RssView {}

redis/mvc/views/viewfactory.php

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+<?php
+namespace MVC\Views;
+
+abstract class ViewFactory
+{
+    abstract public function render() : string;
+
+    public static function create(
+        string $type,
+        string $class,
+        \MVC\Decorators\DecoratorFactory $decorator) : ViewFactory
+    {
+        $class = 'MVC\\Views\\' . ucfirst($class) . ucfirst($type) . 'View';
+        $obj = new $class($decorator);
+
+        return $obj;
+    }
+}

redis/mvc_use.php

@@ -0,0 +1,9 @@
+<?php
+require_once 'config.php';
+
+spl_autoload_register();
+
+use MVC\Controllers\ControllerCache;
+
+$obj = new ControllerCache('users/1.html', $redis);
+echo $obj->render();

redis/ping.php

@@ -0,0 +1,4 @@
+<?php
+$redis = new Redis();
+$redis->connect('127.0.0.1', 6379);
+echo $redis->ping(); // true

redis/session.php

@@ -0,0 +1,9 @@
+<?php
+session_start();
+
+if(!isset($_SESSION['count'])) {
+    $_SESSION['count'] = 0;
+}
+
+$_SESSION['count']++;
+echo $_SESSION['count'];