Allow autotranslation of time spans before 1000 CE

src/NodaTimeAutotranslater.php

@@ -264,10 +264,10 @@ final class NodaTimeAutotranslater {
      */
     public static function check_translatability(string $zeit_beginn, string $zeit_ende, string $zeit_zaehlzeit_monat):int {
 
-        if (intval($zeit_beginn) > 1000 and $zeit_ende === "?") {
+        if ($zeit_ende === "?") {
             return self::TRANSLATABLE_SINCE_START;
         }
-        if (intval($zeit_ende) > 1000 and $zeit_beginn === "?") {
+        if ($zeit_beginn === "?") {
             return self::TRANSLATABLE_UNTIL_END;
         }
 
@@ -347,7 +347,7 @@ final class NodaTimeAutotranslater {
      *
      * @return array<string>
      */
-    public function translateYearsWithSuffix(array $timeInfo):array {
+    public static function translateYearsWithSuffix(array $timeInfo):array {
 
         $start = intval($timeInfo['zeit_beginn']);
         $end = intval($timeInfo['zeit_ende']);

src/NodaTimeSplitter.php

@@ -227,11 +227,11 @@ final class NodaTimeSplitter {
     public static function timePartsToCountingYear(array $moda):int {
 
         if ($moda[0] === "?") {
-            return intval($moda[1]);
+            return abs(intval($moda[1]));
         }
 
         if ($moda[1] === "?") {
-            return intval($moda[0]);
+            return abs(intval($moda[0]));
         }
 
         return abs((int)ceil(intval($moda[1]) - ((intval($moda[1]) - intval($moda[0])) / 2)));
@@ -307,27 +307,34 @@ final class NodaTimeSplitter {
 
         $datum = self::clean_input($datum);
 
-        if (preg_match("/^[0-9][0-9][0-9][0-9](\-|\/)[0-9][0-9][0-9][0-9] v\. Chr\.$/", $datum)) {
+        if (preg_match("/^[0-9][0-9][0-9]\ v\. Chr\.$/", $datum)) {
+            $start = "-0" . substr($datum, 0, 3);
+            return [$start, $start, "00", "00", "-", ""];
+        }
+
+        if (preg_match("/^[0-9][0-9][0-9][0-9](\-|\/)[0-9][0-9][0-9][0-9]\ v\. Chr\.$/", $datum)) {
             $start = "-" . substr($datum, 0, 4);
             $end = "-" . substr($datum, 5, 4);
             return [$start, $end, "00", "00", "-", ""];
         }
-        if (preg_match("/^[0-9][0-9][0-9][0-9](\-|\/)[0-9][0-9][0-9] v\. Chr\.$/", $datum)) {
+        if (preg_match("/^[0-9][0-9][0-9][0-9](\-|\/)[0-9][0-9][0-9]\ v\. Chr\.$/", $datum)) {
             $start = "-" . substr($datum, 0, 4);
             $end = "-" . substr($datum, 5, 3);
             return [$start, $end, "00", "00", "-", ""];
         }
-        if (preg_match("/^[0-9][0-9][0-9](\-|\/)[0-9][0-9][0-9] v\. Chr\.$/", $datum)) {
+        if (preg_match("/^[0-9][0-9][0-9](\-|\/)[0-9][0-9][0-9]\ v\. Chr\.$/", $datum)) {
             $start = "-" . substr($datum, 0, 3);
             $end = "-" . substr($datum, 4, 3);
             return [$start, $end, "00", "00", "-", ""];
         }
-        if (preg_match("/^[0-9][0-9](\-|\/)[0-9][0-9] v\. Chr\.$/", $datum)) {
+        if (preg_match("/^[0-9][0-9](\-|\/)[0-9][0-9]\ v\. Chr\.$/", $datum)) {
             $start = "-00" . substr($datum, 0, 2);
             $end = "-00" . substr($datum, 3, 2);
             return [$start, $end, "00", "00", "-", ""];
         }
 
+        $datum = str_replace(". ", ".", $datum);
+
         if (self::stri_occurs($datum, self::STOP_STRINGS_GERMAN)) {
             return [];
         }
@@ -640,6 +647,34 @@ final class NodaTimeSplitter {
 
     }
 
+    /**
+     * Checks if an input date is a decade.
+     *
+     * @param string $datum Input date.
+     *
+     * @return array<string>
+     */
+    public static function is_decade(string $datum):array {
+
+        $datum = self::clean_input($datum);
+        $bcBceIndicator = '+';
+
+        if (preg_match("/^[0-9]0(er\ Jahre)$/", $datum)) {
+            $start = "19" . substr($datum, 0, 2);
+            $ende = (string)(intval($start) + 9);
+            return [$start, $ende, "00", "00", $bcBceIndicator, ""];
+        }
+
+        if (preg_match("/^[0-9][0-9][0-9]0(er\ Jahre)$/", $datum)) {
+            $start = substr($datum, 0, 4);
+            $ende = (string)(intval($start) + 9);
+            return [$start, $ende, "00", "00", $bcBceIndicator, ""];
+        }
+
+        return [];
+
+    }
+
     /**
      * Wrapper to check if any splitting command works.
      *
@@ -654,6 +689,7 @@ final class NodaTimeSplitter {
         if (!$moda) $moda = NodaTimeSplitter::is_valid_date($datum);
         if (!$moda) $moda = NodaTimeSplitter::is_valid_date_hungarian($datum);
         if (!$moda) $moda = NodaTimeSplitter::is_century($datum);
+        if (!$moda) $moda = NodaTimeSplitter::is_decade($datum);
 
         return $moda;