add ability to setup PSR logger as Closure

src/Logger.php

@@ -11,7 +11,27 @@
  *
  * This class can be used in case you with to utilize 3rd party PSR logger library like "Monolog" in your Yii application.
  *
- * @property \Psr\Log\LoggerInterface|string|array|null $psrLogger related PSR logger.
+ * Configuration example:
+ *
+ * ```php
+ * require __DIR__ . '../vendor/autoload.php';
+ * // ...
+ *
+ * $app = Yii::createWebApplication($config);
+ * $app->setLogger(
+ *     \yii1tech\psr\log\Logger::new()
+ *         ->setPsrLogger(function () {
+ *             $log = new \Monolog\Logger('yii');
+ *             $log->pushHandler(new \Monolog\Handler\StreamHandler('path/to/your.log', \Monolog\Level::Warning));
+ *
+ *             return $log;
+ *         })
+ *         ->enableYiiLog(true)
+ * );
+ * $app->run();
+ * ```
+ *
+ * @property \Psr\Log\LoggerInterface|\Closure|string|array|null $psrLogger related PSR logger.
  *
  * @author Paul Klimov <[email protected]>
  * @since 1.0
@@ -39,13 +59,18 @@ public function getPsrLogger(): ?LoggerInterface
 
         if (!is_object($this->_psrLogger)) {
             $this->_psrLogger = Yii::createComponent($this->_psrLogger);
+        } elseif ($this->_psrLogger instanceof \Closure) {
+            $this->_psrLogger = call_user_func($this->_psrLogger);
         }
 
         return $this->_psrLogger;
     }
 
     /**
-     * @param \Psr\Log\LoggerInterface|string|array|null $psrLogger
+     * Sets the PSR logger to pass logs to.
+     * If `null` provided - no PSR logger will be used.
+     *
+     * @param \Psr\Log\LoggerInterface|\Closure|array|string|null $psrLogger related PSR logger.
      * @return static self reference.
      */
     public function setPsrLogger($psrLogger): self
@@ -104,4 +129,15 @@ public function log($message, $level = 'info', $category = 'application'): void
             );
         }
     }
+
+    /**
+     * Creates new self instance.
+     * This method can be useful when writing chain methods calls.
+     *
+     * @return static new self instance.
+     */
+    public static function new(): self
+    {
+        return new static();
+    }
 }

src/PsrLogRoute.php

@@ -12,10 +12,36 @@
  *
  * This class can be used in case you with to utilize 3rd party PSR logger library like "Monolog" in your Yii application.
  *
+ * Application configuration example:
+ *
+ * ```php
+ * return [
+ *     'components' => [
+ *         'log' => [
+ *             'class' => \CLogRouter::class,
+ *             'routes' => [
+ *                 [
+ *                     'class' => \yii1tech\psr\log\PsrLogRoute::class,
+ *                     'psrLogger' => function () {
+ *                         $log = new \Monolog\Logger('yii');
+ *                         $log->pushHandler(new \Monolog\Handler\StreamHandler('path/to/your.log', \Monolog\Level::Warning));
+ *
+ *                         return $log;
+ *                     },
+ *                 ],
+ *                 // ...
+ *             ],
+ *         ],
+ *         // ...
+ *     ],
+ *     // ...
+ * ];
+ * ```
+ *
  * > Note: even if you use {@see \yii1tech\psr\log\Logger} as Yii logger, this log route will be unable to handle
  *   passed log context correctly.
  *
- * @property \Psr\Log\LoggerInterface|string|array $psrLogger related PSR logger.
+ * @property \Psr\Log\LoggerInterface|\Closure|string|array $psrLogger related PSR logger.
  *
  * @author Paul Klimov <[email protected]>
  * @since 1.0
@@ -38,13 +64,15 @@ public function getPsrLogger(): LoggerInterface
 
         if (!is_object($this->_psrLogger)) {
             $this->_psrLogger = Yii::createComponent($this->_psrLogger);
+        } elseif ($this->_psrLogger instanceof \Closure) {
+            $this->_psrLogger = call_user_func($this->_psrLogger);
         }
 
         return $this->_psrLogger;
     }
 
     /**
-     * @param \Psr\Log\LoggerInterface|array|string $psrLogger
+     * @param \Psr\Log\LoggerInterface|\Closure|array|string $psrLogger
      * @return static self reference.
      */
     public function setPsrLogger($psrLogger): self

tests/LoggerTest.php

@@ -35,6 +35,12 @@ public function testSetupPsrLogger(): void
         ]);
 
         $this->assertTrue($logger->getPsrLogger() instanceof ArrayLogger);
+
+        $logger->setPsrLogger(function () {
+            return new ArrayLogger();
+        });
+
+        $this->assertTrue($logger->getPsrLogger() instanceof ArrayLogger);
     }
 
     public function testWritePsrLog(): void

tests/PsrLogRouteTest.php

@@ -24,6 +24,12 @@ public function testSetupPsrLogger(): void
         ]);
 
         $this->assertTrue($logRoute->getPsrLogger() instanceof ArrayLogger);
+
+        $logRoute->setPsrLogger(function () {
+            return new ArrayLogger();
+        });
+
+        $this->assertTrue($logRoute->getPsrLogger() instanceof ArrayLogger);
     }
 
     public function testWriteLog(): void