From 531192a7be24d479a5f0d41dee1d8837507e37a7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stephan=20B=C3=B6sch-Plepelits?= <skunk@xover.mud.at>
Date: Tue, 19 Apr 2022 21:30:34 +0200
Subject: [PATCH] wikidata/wikipedia: create formatted entry from wikidata

---
 src/wikidata.php  | 62 +++++++++++++++++++++++++++++++++++++++++++++++
 src/wikipedia.php |  2 +-
 2 files changed, 63 insertions(+), 1 deletion(-)

diff --git a/src/wikidata.php b/src/wikidata.php
index 52c74d19..4d1c3a25 100644
--- a/src/wikidata.php
+++ b/src/wikidata.php
@@ -34,3 +34,65 @@ function wikidataGetLabel ($id, $lang) {
     return array_values($data['labels'])[0]['value'];
   }
 }
+
+function wikidataGetValues ($id, $property) {
+  $data = wikidataLoad($id);
+
+  if (!array_key_exists($property, $data['claims'])) {
+    return [];
+  }
+
+  return array_map(
+    function ($el) {
+      return $el['mainsnak']['datavalue']['value'];
+    },
+    $data['claims'][$property]
+  );
+}
+
+function wikidataFormatDate($value, $maxPrecision = 13) {
+  $v = new DateTime($value['time']);
+  $p = min($maxPrecision, $value['precision']);
+
+  if ($p < 9) {
+  } else {
+    $formats = [
+      9 => 'Y',
+      10 => 'M Y',
+      11 => 'j. M Y',
+      12 => 'j. M Y - G:00',
+      13 => 'j. M Y - G:i',
+      14 => 'j. M Y - G:i:s',
+    ];
+
+    return $v->format($formats[$p]);
+  }
+}
+
+function wikidataFormat ($id, $lang) {
+  $ret = '<b>' . wikidataGetLabel($id, $lang) . '</b>';
+
+  $birthDate = wikidataGetValues($id, 'P569');
+  $deathDate = wikidataGetValues($id, 'P570');
+  if (sizeof($birthDate) && sizeof($deathDate)) {
+    $ret .= ' (' . wikidataFormatDate($birthDate[0], 11) . ' — ' . wikidataFormatDate($deathDate[0], 11) . ')';
+  }
+  elseif (sizeof($birthDate)) {
+    $ret .= ' (* ' . wikidataFormatDate($birthDate[0], 11) . ')';
+  }
+  elseif (sizeof($deathDate)) {
+    $ret .= ' († ' . wikidataFormatDate($birthDate[0], 11) . ')';
+  }
+
+  $occupation = wikidataGetValues($id, 'P106');
+  if (sizeof($occupation)) {
+    $ret .= ', ' . implode(', ', array_map(
+      function ($value) use ($lang) {
+        return wikidataGetLabel($value['id'], $lang);
+      },
+      $occupation
+    ));
+  }
+
+  return $ret;
+}
diff --git a/src/wikipedia.php b/src/wikipedia.php
index 3f42dcdc..e34eed56 100644
--- a/src/wikipedia.php
+++ b/src/wikipedia.php
@@ -27,7 +27,7 @@ function ajax_wikipedia ($param) {
         $wp_url = $data['sitelinks'][$id]['url'];
       }
       else {
-        $content = "<div><div id='mw-content-text'><div><p>" . wikidataGetLabel($param['page'], $param['lang']) . "</p></div></div></div>";
+        $content = "<div><div id='mw-content-text'><div><p>" . wikidataFormat($param['page'], $param['lang']) . "</p></div></div></div>";
         $url = "https://wikidata.org/wiki/{$param['page']}";
         if (array_key_exists('commonswiki', $data['sitelinks'])) {
           $url = $data['sitelinks']['commonswiki']['url'];