From d53f046bc7960a4913ef028f8881c8e22ae62ca8 Mon Sep 17 00:00:00 2001
From: Robert Haines <rhaines@manchester.ac.uk>
Date: Thu, 7 Mar 2024 21:31:24 +0000
Subject: [PATCH] Add `Entry#absolute_time?`.

This method returns `true` if an entry has timezone information in its
timestamps, `false` otherwise.
---
 lib/zip/entry.rb   | 5 +++++
 test/entry_test.rb | 8 ++++++++
 2 files changed, 13 insertions(+)

diff --git a/lib/zip/entry.rb b/lib/zip/entry.rb
index fe3b9f1..9e1a904 100644
--- a/lib/zip/entry.rb
+++ b/lib/zip/entry.rb
@@ -176,6 +176,11 @@ module Zip
       send(:time=, value, component: :ctime)
     end
 
+    # Does this entry return time fields with accurate timezone information?
+    def absolute_time?
+      @extra.member?('UniversalTime') || @extra.member?('NTFS')
+    end
+
     # Return the compression method for this entry.
     #
     # Returns STORED if the entry is a directory or if the compression
diff --git a/test/entry_test.rb b/test/entry_test.rb
index 0d88c87..b2d4c14 100644
--- a/test/entry_test.rb
+++ b/test/entry_test.rb
@@ -340,4 +340,12 @@ class ZipEntryTest < MiniTest::Test
     entry.gather_fileinfo_from_srcpath('test/data/mimetype')
     assert_equal(entry.time, File.stat('test/data/mimetype').mtime)
   end
+
+  def test_absolute_time
+    entry = ::Zip::Entry.new
+    refute(entry.absolute_time?)
+
+    entry.time = Time.now
+    assert(entry.absolute_time?)
+  end
 end