Check Readme Third Parties must have Privacy Notes in the readme

includes/Checker/Checks/Plugin_Repo/Plugin_Readme_Check.php

@@ -12,6 +12,8 @@
 use WordPress\Plugin_Check\Checker\Checks\Abstract_File_Check;
 use WordPress\Plugin_Check\Traits\Amend_Check_Result;
 use WordPress\Plugin_Check\Traits\Find_Readme;
+use WordPress\Plugin_Check\Traits\TLD_Names;
+use WordPress\Plugin_Check\Traits\External_Utils;
 use WordPress\Plugin_Check\Traits\License_Utils;
 use WordPress\Plugin_Check\Traits\Stable_Check;
 use WordPressdotorg\Plugin_Directory\Readme\Parser;
@@ -27,6 +29,8 @@ class Plugin_Readme_Check extends Abstract_File_Check {
 
 	use Amend_Check_Result;
 	use Find_Readme;
+	use TLD_Names;
+	use External_Utils;
 	use Stable_Check;
 	use License_Utils;
 
@@ -106,6 +110,9 @@ protected function check_files( Check_Result $result, array $files ) {
 
 		// Check the readme file for contributors.
 		$this->check_for_contributors( $result, $readme_file );
+
+		// Check for third parties privacy notes.
+		$this->check_for_privacy_notes( $result, $readme_file, $parser, $files );
 	}
 
 	/**
@@ -652,6 +659,27 @@ private function check_for_contributors( Check_Result $result, string $readme_fi
 		}
 	}
 
+	/**
+	 * Checks the readme file for external privacy notes.
+	 *
+	 * @since 1.4.0
+	 *
+	 * @param Check_Result $result      The Check Result to amend.
+	 * @param string       $readme_file Readme file.
+	 */
+	private function check_for_privacy_notes( Check_Result $result, string $readme_file, Parser $parser, array $files ) {
+		$existing_tld_names = $this->get_tld_names();
+		$domains            = $this->load_domains_mentioned_in_readme( $readme_file, $existing_tld_names );
+		$files_ext          = self::filter_files_by_extensions( $files, array( 'php', 'css', 'js' ) );
+
+		foreach( $files_ext as $file ) {
+			$result = $this->find_external_calls( $file );
+
+		}
+
+
+	}
+
 	/**
 	 * Returns current major WordPress version.
 	 *