Add Redis dependency

composer.json

@@ -10,6 +10,7 @@
         "illuminate/translation": "^8.0",
         "nesbot/carbon": "^2.31",
         "phroute/phroute": "^2.1",
+        "predis/predis": "^1.1",
         "symfony/console": "^5.3",
         "twig/twig": "^3.0",
         "wohali/oauth2-discord-new": "^1.0"

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "2c0f387d0670a0c885674c4f2c9fa338",
+    "content-hash": "20501082c4ed98a338ac13bf64ae6fc1",
     "packages": [
         {
             "name": "cloudinary/cloudinary_php",
@@ -1522,6 +1522,72 @@
             },
             "time": "2015-07-22T20:46:43+00:00"
         },
+        {
+            "name": "predis/predis",
+            "version": "v1.1.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/predis/predis.git",
+                "reference": "b240daa106d4e02f0c5b7079b41e31ddf66fddf8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/predis/predis/zipball/b240daa106d4e02f0c5b7079b41e31ddf66fddf8",
+                "reference": "b240daa106d4e02f0c5b7079b41e31ddf66fddf8",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.9"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.8"
+            },
+            "suggest": {
+                "ext-curl": "Allows access to Webdis when paired with phpiredis",
+                "ext-phpiredis": "Allows faster serialization and deserialization of the Redis protocol"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Predis\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Daniele Alessandri",
+                    "email": "suppakilla@gmail.com",
+                    "homepage": "http://clorophilla.net",
+                    "role": "Creator & Maintainer"
+                },
+                {
+                    "name": "Till Krüss",
+                    "homepage": "https://till.im",
+                    "role": "Maintainer"
+                }
+            ],
+            "description": "Flexible and feature-complete Redis client for PHP and HHVM",
+            "homepage": "http://github.com/predis/predis",
+            "keywords": [
+                "nosql",
+                "predis",
+                "redis"
+            ],
+            "support": {
+                "issues": "https://github.com/predis/predis/issues",
+                "source": "https://github.com/predis/predis/tree/v1.1.7"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sponsors/tillkruss",
+                    "type": "github"
+                }
+            ],
+            "time": "2021-04-04T19:34:46+00:00"
+        },
         {
             "name": "psr/container",
             "version": "1.1.1",

core.php

@@ -16,6 +16,7 @@ setlocale(LC_TIME, 'English');
 ExceptionHandler::register();
 Config::load();
 DB::connect(config('database'));
+Cache::init();
 
 Hashid::init(config('general.link_salt'));
 Upload::init();

src/Cache.php

@@ -0,0 +1,90 @@
+<?php
+/**
+ * Holds the Redis engine.
+ */
+
+namespace Miiverse;
+
+use Predis\Client as Redis;
+
+/**
+ * Handles the Redis cache system.
+ *
+ * @author Repflez
+ */
+class Cache
+{
+    /**
+     * The object of Predis.
+     * 
+     * @var Predis\Client
+     */
+    private static $redis = null;
+
+    /**
+     * Initialise Redis engine.
+     */
+    public static function init() : void {
+        self::$redis = new Redis;
+    }
+
+    /**
+     * Get a value.
+     * 
+     * @param string $key The key to be fetched
+     * @param int $ttl The TTL of the object. If the object has a larger TTL, it's considered stale and returns null.
+     */
+    public static function get(string $key, int $ttl = 120) {
+        $key = 'ffe00475fc9ccd10bb002534512d2749-' . strtr($key, ':/', '-_');
+
+        // Fetch cache data from Redis.
+        $data = self::$redis->get($key);
+        if ($data) {
+            list($created, $contents) = unserialize($data);
+
+            if (($created + $ttl) < time()) {
+                return null;
+            } else {
+                return $contents;
+            }
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Store a value.
+     * 
+     * @param string $key The key name it's being stored
+     * @param mixed $value The value to be stored
+     */
+    public static function store(string $key, $value) : void {
+        $key = 'ffe00475fc9ccd10bb002534512d2749-' . strtr($key, ':/', '-_');
+        $value = $value ?? null;
+
+        // Storing this in Redis
+        $store = serialize([time(), $value]);
+
+        self::$redis->set($key, $store);
+    }
+
+    /**
+     * Delete value
+     * 
+     * @param string $key The key to delete
+     */
+    public static function delete(string $key) : void {
+        $key = 'ffe00475fc9ccd10bb002534512d2749-' . strtr($key, ':/', '-_');
+
+        self::$redis->del($key);
+    }
+
+    /**
+     * Checks if redis is available.
+     * 
+     * @return bool Redis availability
+     */
+    public static function available() : bool {
+        return self::$redis !== null;
+    }
+}