From 3d1c7d35f83e6090097508199aa09c4b7e549a7e Mon Sep 17 00:00:00 2001
From: Norbert Czirjak <norbert.czirjak@oeaw.ac.at>
Date: Mon, 19 Aug 2024 13:54:33 +0200
Subject: [PATCH] gregorian calendat display year issue

---
 src/TwigExtension/ArcheTwigDateExtension.php | 96 +++++++++-----------
 1 file changed, 42 insertions(+), 54 deletions(-)

diff --git a/src/TwigExtension/ArcheTwigDateExtension.php b/src/TwigExtension/ArcheTwigDateExtension.php
index 5b90bd0..dcb6085 100644
--- a/src/TwigExtension/ArcheTwigDateExtension.php
+++ b/src/TwigExtension/ArcheTwigDateExtension.php
@@ -5,43 +5,39 @@
 use Twig\Extension\AbstractExtension;
 use Twig\TwigFunction;
 
-class ArcheTwigDateExtension extends \Twig\Extension\AbstractExtension
-{
-    public function getFilters()
-    {
-        return [ new \Twig\TwigFilter('archeTranslateDateFilter', function ($value, $dateformat) {
-            (isset($_SESSION['language'])) ? $lang = strtolower($_SESSION['language'])  : $lang = "en";
-            
-            if (strpos($value, "Z") !== false) {
-                $value = str_replace("Z", "", $value);
-            }
-            if ($this->checkYearIsMoreThanFourDigit($value)) {
-                return $this->notNormalDate($value, $lang, $dateformat);
-            }
-            return $this->returnFormattedDate($dateformat, $value, $lang);
-        })
+class ArcheTwigDateExtension extends \Twig\Extension\AbstractExtension {
+
+    public function getFilters() {
+        return [new \Twig\TwigFilter('archeTranslateDateFilter', function ($value, $dateformat) {
+                        (isset($_SESSION['language'])) ? $lang = strtolower($_SESSION['language']) : $lang = "en";
+
+                        if (strpos($value, "Z") !== false) {
+                            $value = str_replace("Z", "", $value);
+                        }
+                        if ($this->checkYearIsMoreThanFourDigit($value)) {
+                            return $this->notNormalDate($value, $lang, $dateformat);
+                        }
+                        return $this->returnFormattedDate($dateformat, $value, $lang);
+                    })
         ];
     }
 
     /**
      * Gets a unique identifier for this Twig extension.
      */
-    public function getName()
-    {
+    public function getName() {
         return 'arche_core_gui.twig_extension';
     }
 
-    private function checkYearIsMoreThanFourDigit($value): bool
-    {
+    private function checkYearIsMoreThanFourDigit($value): bool {
         $explode = explode("-", $value);
         if (strlen($explode[0]) > 4) {
             return true;
         }
         return false;
     }
-    
-    private function checkDateTimeValue($value)
-    {
+
+    private function checkDateTimeValue($value) {
         $datetime = new \DateTime();
         $newDate = $datetime->createFromFormat('Y-m-d', $value);
         if ($newDate) {
@@ -57,67 +53,59 @@ private function checkDateTimeValue($value)
      * @param type $lang
      * @return string
      */
-    private function returnFormattedDate($dateformat, $value, $lang): string
-    {
-        /* we have to setup the timezone and locale, otherwise it will mix up the year */
-        ini_set('date.timezone', 'UTC');
-        ini_set('intl.default_locale', 'de_DE');
-        setlocale(LC_TIME, 'de_DE.utf8');
-        
-        $value = $this->checkDateTimeValue($value);
-        $cal = \IntlCalendar::fromDateTime($value);
-        
-        if ($cal === null) {
-            return "";
-        }
+    private function returnFormattedDate($dateformat, $value, $lang): string {
+
+        $date = new \DateTime($value);
+        // Determine if the date is before the Gregorian calendar was adopted.
+        $gregorian_start = new \DateTime('1582-10-15');
+
+        if ($date < $gregorian_start && (strtolower($dateformat) === 'yyyy' || strtolower($dateformat) === 'y')) {
+            // For dates before Gregorian calendar, directly extract the year.
+            return $date->format('Y');
+        } 
         
-        if ($lang == 'de') {
-            return \IntlDateFormatter::formatObject($cal, $dateformat, 'de_DE');
-        }
-        ini_set('intl.default_locale', 'en_US');
-        setlocale(LC_TIME, 'en_US.utf8');
-        return \IntlDateFormatter::formatObject($cal, $dateformat, 'en_US');
+        $formatter = new \IntlDateFormatter($lang, \IntlDateFormatter::NONE, \IntlDateFormatter::NONE, null, null, $dateformat);
+        // Format the date and return the year.
+        return $formatter->format($date);        
     }
 
-    
     /**
      * Return the befrore christ dates where we have 5 digit years numbers
      * @param type $value
      * @return string
      */
-    private function notNormalDate($value, $lang, $dateformat): string
-    {
+    private function notNormalDate($value, $lang, $dateformat): string {
         ini_set('date.timezone', 'UTC');
         ini_set('intl.default_locale', 'en_US');
         setlocale(LC_TIME, 'en_US.utf8');
-        
+
         if ($lang == 'de') {
             ini_set('intl.default_locale', 'de_DE');
             setlocale(LC_TIME, 'de_DE.utf8');
         }
         $e = explode("-", $value);
-        
+
         $y = $e[0];
         $m = $e[1];
         $d = $e[2];
-        
+
         switch ($dateformat) {
             case 'Y':
                 return $y;
             case 'd-m-Y':
-                return $m.'-'.$d.'-'.$y;
+                return $m . '-' . $d . '-' . $y;
             case 'd-m-y':
-                return $m.'-'.$d.'-'.$y;
+                return $m . '-' . $d . '-' . $y;
             case 'd M Y':
-                return $d.'-'.date('M', $m).'-'.$y;
+                return $d . '-' . date('M', $m) . '-' . $y;
             case 'd M y':
-                return $d.'-'.date('M', $m).'-'.$y;
+                return $d . '-' . date('M', $m) . '-' . $y;
             case 'Y M d':
-                return $y.'-'.date('M', $m).'-'.$d;
+                return $y . '-' . date('M', $m) . '-' . $d;
             case 'y M d':
-                return $y.'-'.date('M', $m).'-'.$d;
+                return $y . '-' . date('M', $m) . '-' . $d;
             default:
-                return $y.'-'.$m.'-'.$d;
+                return $y . '-' . $m . '-' . $d;
         }
     }
 }