first commit

lib/Log/LogFactory.php

@@ -0,0 +1,88 @@
+<?php
+
+namespace Yeepay\Yop\Sdk\Log;
+
+use Psr\Log\LoggerInterface;
+
+/**
+ * The global LogFactory for the SDK.
+ */
+class LogFactory
+{
+
+    /**
+     * @var LogFactoryInterface the LogFactory instance
+     */
+    private static $instance;
+
+    private static $logLevel;
+
+    private static $logLevelMapping;
+
+    public static function __init()
+    {
+        LogFactory::$instance        = new NullLogFactory();
+        LogFactory::$logLevelMapping = [
+            'emergency' => 0,
+            'alert'     => 1,
+            'critical'  => 2,
+            'error'     => 3,
+            'warning'   => 4,
+            'notice'    => 5,
+            'info'      => 6,
+            'debug'     => 7,
+        ];
+        LogFactory::$logLevel        = 6;
+    }
+
+    /**
+     * @param  LogFactoryInterface  $logFactory  the logFactory interface.
+     * @throws \InvalidArgumentException if $logFactory is null.
+     */
+    public static function setInstance(LogFactoryInterface $logFactory)
+    {
+        if ($logFactory === null) {
+            throw new \InvalidArgumentException(
+                '$logFactory should not be null.'
+            );
+        }
+        LogFactory::$instance = $logFactory;
+    }
+
+    /**
+     * @param  string  $logLevel  the log level. The value can be 'emergency',
+     *     'alert', 'critical', 'error', 'warning', 'notice', 'info', or
+     *     'debug'.
+     * @throws \InvalidArgumentException if no such a log level is defined.
+     */
+    public static function setLogLevel($logLevel)
+    {
+        if (isset(LogFactory::$logLevelMapping[$logLevel])) {
+            LogFactory::$logLevel = LogFactory::$logLevelMapping[$logLevel];
+        } else {
+            throw new \InvalidArgumentException(
+                "Unrecognized log level $logLevel"
+            );
+        }
+    }
+
+    /**
+     * @return boolean true if the debug log level is enabled.
+     */
+    public static function isDebugEnabled()
+    {
+        return LogFactory::$logLevel >= 7;
+    }
+
+    /**
+     * @param $name string the name of logger
+     * @return LoggerInterface the Logger instance
+     */
+    public static function getLogger($name)
+    {
+        return LogFactory::$instance->getLogger($name);
+    }
+
+}
+
+LogFactory::__init();