From fa7c481028c5fcbe473e213387f8d2347ff65e26 Mon Sep 17 00:00:00 2001
From: Go MAEDA <maeda@farend.jp>
Date: Thu, 16 Nov 2023 11:13:39 +0000
Subject: [PATCH] Auto-detection of field wrapper type when importing CSV file
 (#39511).

Patch by Go MAEDA.


git-svn-id: https://svn.redmine.org/redmine/trunk@22440 e93f8b46-1217-0410-a6f0-8f06a7374b81
---
 app/models/import.rb           |  3 ++-
 test/unit/issue_import_test.rb | 15 +++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/app/models/import.rb b/app/models/import.rb
index fe3f24fab..2674606bb 100644
--- a/app/models/import.rb
+++ b/app/models/import.rb
@@ -65,12 +65,14 @@ class Import < ActiveRecord::Base
 
   def set_default_settings(options={})
     separator = lu(user, :general_csv_separator)
+    wrapper = '"'
     encoding = lu(user, :general_csv_encoding)
     if file_exists?
       begin
         content = File.read(filepath, 256)
 
         separator = [',', ';'].max_by {|sep| content.count(sep)}
+        wrapper = ['"', "'"].max_by {|quote_char| content.count(quote_char)}
 
         guessed_encoding = Redmine::CodesetUtil.guess_encoding(content)
         encoding =
@@ -81,7 +83,6 @@ class Import < ActiveRecord::Base
       rescue => e
       end
     end
-    wrapper = '"'
 
     date_format = lu(user, "date.formats.default", :default => "foo")
     date_format = DATE_FORMATS.first unless DATE_FORMATS.include?(date_format)
diff --git a/test/unit/issue_import_test.rb b/test/unit/issue_import_test.rb
index d68f0e44c..00c13e0bb 100644
--- a/test/unit/issue_import_test.rb
+++ b/test/unit/issue_import_test.rb
@@ -463,4 +463,19 @@ class IssueImportTest < ActiveSupport::TestCase
       assert_equal 'CP932', guessed_encoding
     end
   end
+
+  def test_set_default_settings_should_detect_field_wrapper
+    to_test = {
+      'import_issues.csv' => '"',
+      'import_issues_single_quotation.csv' => "'",
+      # Use '"' as a wrapper for CSV file with no wrappers
+      'import_dates.csv' => '"',
+    }
+
+    to_test.each do |file, expected|
+      import = generate_import(file)
+      import.set_default_settings
+      assert_equal expected, import.settings['wrapper']
+    end
+  end
 end