From bca32c33c7b3c8d318e4bbe1cec77750a68c70f1 Mon Sep 17 00:00:00 2001
From: Joshua Ramon Enslin <joshua@museum-digital.de>
Date: Sun, 12 Apr 2026 01:38:37 +0200
Subject: [PATCH] Timesplitter: Translate "(terminus post quem)" to since

Close #39
---
 src/NodaTimeSplitter.php       | 17 +++++++++++++++++
 tests/NodaTimeSplitterTest.php | 27 +++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/src/NodaTimeSplitter.php b/src/NodaTimeSplitter.php
index 3b6c445..f542d17 100644
--- a/src/NodaTimeSplitter.php
+++ b/src/NodaTimeSplitter.php
@@ -917,6 +917,23 @@ final class NodaTimeSplitter {
                     $output->counting_time_indicator, NodaTimeBeforeAfterIndicator::until, '?', $output->end_date);
             }
         }
+        if (str_ends_with($datum, "terminus ante quem")) {
+            if (($spacePos = \strrpos($datum, " ", -15)) === false) {
+                return false;
+            }
+            if ($output = self::attempt_splitting(\substr($datum, 0, $spacePos))) {
+                return self::_turn_noda_split_time_to_before($output);
+            }
+        }
+        if (\str_ends_with($datum, "termiusost quem")) {
+            if (($spacePos = strrpos($datum, " ", -10)) === false) {
+                return false;
+            }
+            if ($output = self::attempt_splitting(\substr($datum, 0, $spacePos))) {
+                return new NodaSplitTime($output->start_year, '?', $output->counting_time_month, $output->counting_time_day,
+                    $output->counting_time_indicator, NodaTimeBeforeAfterIndicator::since, $output->start_date, '?');
+            }
+        }
         // Ends beginning with a hyphen
         if (\preg_match("/\-ig(\.|)$/", $datum)) {
             if (($spacePos = strrpos($datum, "-")) === false) {
diff --git a/tests/NodaTimeSplitterTest.php b/tests/NodaTimeSplitterTest.php
index ebc545e..b67f883 100644
--- a/tests/NodaTimeSplitterTest.php
+++ b/tests/NodaTimeSplitterTest.php
@@ -764,6 +764,19 @@ final class NodaTimeSplitterTest extends TestCase {
         self::assertEquals($output->toTimeName(), "1920-1929");
         self::assertEquals(NodaTimeSplitter::timePartsToCountingYear($output), 1925);
 
+        $output = NodaTimeSplitter::attempt_splitting("2020 (terminus ante quem)");
+        self::assertNotEmpty($output);
+        self::assertEquals($output->toOldFormat(), [
+            0 => "?",
+            1 => "2019",
+            2 => "00",
+            3 => "00",
+            4 => "+",
+            5 => "Vor",
+        ]);
+        self::assertEquals($output->toTimeName(), "Vor 2020");
+        self::assertEquals(NodaTimeSplitter::timePartsToCountingYear($output), 2020);
+
         $output = NodaTimeSplitter::attempt_splitting("Vor Dezember 2020");
         self::assertNotEmpty($output);
         self::assertEquals($output->toOldFormat(), [
@@ -1271,6 +1284,20 @@ final class NodaTimeSplitterTest extends TestCase {
         self::assertEquals($output->toTimeName(), "Seit 1920");
         self::assertEquals(NodaTimeSplitter::timePartsToCountingYear($output), 1920);
 
+        // From 1920 onwards
+        $output = NodaTimeSplitter::attempt_splitting("1926 (termius post quem)");
+        self::assertNotEmpty($output);
+        self::assertEquals($output->toOldFormat(), [
+            0 => "1926",
+            1 => "?",
+            2 => "00",
+            3 => "00",
+            4 => "+",
+            5 => "Seit",
+        ]);
+        self::assertEquals($output->toTimeName(), "Seit 1926");
+        self::assertEquals(NodaTimeSplitter::timePartsToCountingYear($output), 1926);
+
         $output = NodaTimeSplitter::attempt_splitting("III. század");
         self::assertNotEmpty($output);
         self::assertEquals($output->toOldFormat(), [