Add rudimentary logger

[MAILPOET-570]

lib/Config/Database.php

@@ -85,6 +85,7 @@ class Database {
       $statistics_unsubscribes = Env::$db_prefix . 'statistics_unsubscribes';
       $statistics_forms = Env::$db_prefix . 'statistics_forms';
       $mapping_to_external_entities = Env::$db_prefix . 'mapping_to_external_entities';
+      $log = Env::$db_prefix . 'log';
 
       define('MP_SETTINGS_TABLE', $settings);
       define('MP_SEGMENTS_TABLE', $segments);
@@ -110,6 +111,7 @@ class Database {
       define('MP_STATISTICS_UNSUBSCRIBES_TABLE', $statistics_unsubscribes);
       define('MP_STATISTICS_FORMS_TABLE', $statistics_forms);
       define('MP_MAPPING_TO_EXTERNAL_ENTITIES_TABLE', $mapping_to_external_entities);
+      define('MP_LOG_TABLE', $log);
     }
   }
 }

lib/Config/Migrator.php

@@ -435,10 +435,12 @@ class Migrator {
 
   function log() {
     $attributes = [
+      'id BIGINT unsigned NOT NULL AUTO_INCREMENT,',
       'name VARCHAR(255),',
       'level INTEGER,',
       'message LONGTEXT,',
-      'time TIMESTAMP DEFAULT CURRENT_TIMESTAMP',
+      'created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP',
+      'PRIMARY KEY (id),',
     ];
     return $this->sqlify(__FUNCTION__, $attributes);
   }

lib/Logging/LogHandler.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace MailPoet\Logging;
+
+use MailPoet\Dependencies\Monolog\Handler\AbstractProcessingHandler;
+use MailPoet\Models\Log;
+
+class LogHandler extends AbstractProcessingHandler {
+
+
+  protected function write(array $record) {
+    $model = Log::create();
+    $model->hydrate([
+      'name' => $record['channel'],
+      'level' => $record['level'],
+      'message' => $record['formatted'],
+      'created_at' => $record['datetime']->format('Y-m-d H:i:s'),
+    ]);
+    $model->save();
+  }
+
+}

lib/Logging/Logger.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace MailPoet\Logging;
+
+use MailPoet\Dependencies\Monolog\Processor\IntrospectionProcessor;
+use MailPoet\Dependencies\Monolog\Processor\MemoryUsageProcessor;
+use MailPoet\Dependencies\Monolog\Processor\WebProcessor;
+
+class Logger {
+
+  /** @var \MailPoet\Dependencies\Monolog\Logger[] */
+  private static $instance = [];
+
+  /**
+   * @param string $name
+   * @param bool $forceCreate
+   *
+   * @return \MailPoet\Dependencies\Monolog\Logger
+   */
+  public static function getLogger($name = 'MailPoet', $forceCreate = false) {
+    if(!isset(self::$instance[$name]) || $forceCreate) {
+      self::$instance[$name] = new \MailPoet\Dependencies\Monolog\Logger($name);
+
+      if(WP_DEBUG) {
+        // Adds the line/file/class/method from which the log call originated
+        self::$instance[$name]->pushProcessor(new IntrospectionProcessor());
+        // Adds the current request URI, request method and client IP to a log record
+        self::$instance[$name]->pushProcessor(new WebProcessor());
+        // Adds the current memory usage to a log record
+        self::$instance[$name]->pushProcessor(new MemoryUsageProcessor());
+      }
+
+      self::$instance[$name]->pushHandler(new LogHandler());
+    }
+    return self::$instance[$name];
+  }
+
+}

lib/Models/Log.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace MailPoet\Models;
+
+class Log extends Model {
+  public static $_table = MP_LOG_TABLE;
+
+}