Add Record/Level/LevelName type aliases and improve phpstan type coverage to level 6

src/Monolog/Handler/Slack/SlackRecord.php

@@ -23,6 +23,8 @@ use Monolog\Formatter\FormatterInterface;
  * @author Haralan Dobrev <hkdobrev@gmail.com>
  * @see    https://api.slack.com/incoming-webhooks
  * @see    https://api.slack.com/docs/message-attachments
+ *
+ * @phpstan-import-type FormattedRecord from \Monolog\Handler\AbstractProcessingHandler
  */
 class SlackRecord
 {
@@ -72,7 +74,7 @@ class SlackRecord
 
     /**
      * Dot separated list of fields to exclude from slack message. E.g. ['context.field1', 'extra.field2']
-     * @var array
+     * @var string[]
      */
     private $excludeFields;
 
@@ -86,6 +88,9 @@ class SlackRecord
      */
     private $normalizerFormatter;
 
+    /**
+     * @param string[] $excludeFields
+     */
     public function __construct(
         ?string $channel = null,
         ?string $username = null,
@@ -114,6 +119,9 @@ class SlackRecord
     /**
      * Returns required data in format that Slack
      * is expecting.
+     *
+     * @phpstan-param FormattedRecord $record
+     * @phpstan-return string[]
      */
     public function getSlackData(array $record): array
     {
@@ -208,6 +216,8 @@ class SlackRecord
 
     /**
      * Stringifies an array of key/value pairs to be used in attachment fields
+     *
+     * @param mixed[] $fields
      */
     public function stringify(array $fields): string
     {
@@ -285,6 +295,9 @@ class SlackRecord
         return $this;
     }
 
+    /**
+     * @param string[] $excludeFields
+     */
     public function excludeFields(array $excludeFields = []): self
     {
         $this->excludeFields = $excludeFields;
@@ -302,7 +315,8 @@ class SlackRecord
     /**
      * Generates attachment field
      *
-     * @param string|array $value
+     * @param string|mixed[] $value
+     * @return array{title: string, value: string, short: false}
      */
     private function generateAttachmentField(string $title, $value): array
     {
@@ -319,6 +333,9 @@ class SlackRecord
 
     /**
      * Generates a collection of attachment fields from array
+     *
+     * @param mixed[] $data
+     * @return array<array{title: string, value: string, short: false}>
      */
     private function generateAttachmentFields(array $data): array
     {
@@ -332,6 +349,9 @@ class SlackRecord
 
     /**
      * Get a copy of record with fields excluded according to $this->excludeFields
+     *
+     * @phpstan-param FormattedRecord $record
+     * @return mixed[]
      */
     private function removeExcludedFields(array $record): array
     {