Fix PHPStan Errors , Rename files due to pascal case rules

packages/base/libraries/Cache/FileLockTimeoutException.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace packages\base\Cache;
+
+use packages\base\Exception;
+
+class FileLockTimeoutException extends Exception
+{
+}

packages/base/libraries/Cache/MemcacheExtensionException.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace packages\base\Cache;
+
+use packages\base\Exception;
+
+class MemcacheExtensionException extends Exception
+{
+    public function __construct()
+    {
+        parent::__construct("memcached extenstion doesn't loaded");
+    }
+}

packages/base/libraries/Cache/MemcacheHandler.php

@@ -0,0 +1,131 @@
+<?php
+
+namespace packages\base\Cache;
+
+use packages\base\Date;
+
+class MemcacheHandler implements ICacheHandler
+{
+    /**
+     * @var array
+     */
+    protected $options;
+
+    /**
+     * @var \Memcached
+     */
+    protected $memcache;
+
+    /**
+     * Create a Memcache instance.
+     */
+    public function __construct(array $options)
+    {
+        if (!extension_loaded('memcached')) {
+            throw new MemcacheExtensionException();
+        }
+
+        $this->options = array_replace_recursive([
+            'prefix' => '',
+            'server' => [[
+                'host' => 'localhost',
+                'port' => 11211,
+            ]],
+            'persistentID' => null,
+        ], $options);
+
+        $this->memcache = new \Memcached($this->options['persistentID']);
+        $this->addDefaultServers();
+    }
+
+    /**
+     * Retrieve an item.
+     *
+     * @param string $name the key of the item to retrieve
+     *
+     * @return mixed|null returns the value stored in the cache or NULL otherwise
+     */
+    public function get(string $name)
+    {
+        return $this->memcache->get($this->name($name));
+    }
+
+    /**
+     * Check existance of an item.
+     *
+     * @param string $name the key of the item to be check
+     */
+    public function has(string $name): bool
+    {
+        return (bool) $this->get($name);
+    }
+
+    /**
+     * Store an item.
+     *
+     * @param string $name    the key under which to store the value
+     * @param mixed  $value   the value to store
+     * @param int    $timeout the expiration time
+     */
+    public function set(string $name, $value, int $timeout = 0): void
+    {
+        $this->memcache->set($this->name($name), $value, 0 == $timeout ? $timeout : Date::time() + $timeout);
+    }
+
+    /**
+     * Delete an item.
+     *
+     * @param string $name the key to be deleted
+     */
+    public function delete(string $name): void
+    {
+        $this->memcache->delete($this->name($name));
+    }
+
+    /**
+     * Invalidate all items in the cache.
+     */
+    public function flush(): void
+    {
+        $this->memcache->flush();
+    }
+
+    /**
+     * Run garbage collector for cache storage.
+     */
+    public function clear(): void
+    {
+    }
+
+    /**
+     * Set a new expiration on an item.
+     *
+     * @param string $name    the key under which to store the value
+     * @param int    $timeout the expiration time
+     */
+    public function touch(string $name, int $timeout): void
+    {
+        $this->memcache->touch($this->name($name), 0 == $timeout ? $timeout : Date::time() + $timeout);
+    }
+
+    /**
+     * Prepare name of item for shared storage.
+     */
+    protected function name(string $name): string
+    {
+        return md5($this->options['prefix'].$name);
+    }
+
+    /**
+     * Add servers to memcache instance according to options.
+     */
+    protected function addDefaultServers(): void
+    {
+        if (!empty($this->memcache->getServerList())) {
+            return;
+        }
+        foreach ($this->options['server'] as $server) {
+            $this->memcache->addServer($server['host'], $server['port'] ?? 11211, $server['weight'] ?? 0);
+        }
+    }
+}

packages/base/libraries/DB/DatabaseException.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace packages\base\DB;
+
+use packages\base\Exception;
+
+class DatabaseException extends Exception
+{
+}