+<?php
+
+namespace Drupal\drupalmoduleupgrader\Plugin\DMU\Converter\Functions;
+
+use Drupal\drupalmoduleupgrader\TargetInterface;
+use Pharborist\Constants\ConstantNode;
+use Pharborist\Functions\FunctionCallNode;
+use Pharborist\Objects\ClassMethodCallNode;
+use Pharborist\Types\ArrayNode;
+
+/**
+ * @Converter(
+ * id = "watchdog",
+ * description = @Translation("Converts calls to watchdog() to \Drupal::logger().")
+ * )
+ */
+class Watchdog extends FunctionCallModifier {
+
+ protected static $severityConstants = [
+ 'WATCHDOG_EMERGENCY',
+ 'WATCHDOG_ALERT',
+ 'WATCHDOG_CRITICAL',
+ 'WATCHDOG_ERROR',
+ 'WATCHDOG_WARNING',
+ 'WATCHDOG_NOTICE',
+ 'WATCHDOG_INFO',
+ 'WATCHDOG_DEBUG',
+ ];
+
+ /**
+ * {@inheritdoc}
+ */
+ public function rewrite(FunctionCallNode $call, TargetInterface $target) {
+ $arguments = $call->getArguments();
+
+ // We'll call a specific method on the logger object, depending on the
+ // severity passed in the original function call (if any). If there are
+ // at least four arguments, a severity was passed. We check $arguments[3]
+ // to ensure it's a valid severity constant, and if it's not, we default
+ // to the notice() severity.
+ //
+ // @TODO Leave a FIXME for an invalid severity, since changing it to a
+ // notice alters the intent of the original code.
+ //
+ if (sizeof($arguments) > 3 && $arguments[3] instanceof ConstantNode && in_array($arguments[3]->getConstantName()->getText(), static::$severityConstants)) {
+ $method = strtolower(subStr($arguments[3], 9));
+ }
+ else {
+ $method = 'notice';
+ }
+
+ // If there is a third argument, and it's an array, a context array
+ // was passed.
+ $context = (sizeof($arguments) > 2 && $arguments[2] instanceof ArrayNode) ? clone $arguments[2] : ArrayNode::create([]);
+
+ return ClassMethodCallNode::create('\Drupal', 'logger')
+ ->appendArgument(clone $arguments[0])
+ ->appendMethodCall($method)
+ ->appendArgument(clone $arguments[1])
+ ->appendArgument($context);
+ }
+
+}