Load first abstract from Wikipedia page and show on details page

lang/de.json

@@ -12,5 +12,6 @@
     "save": "Speichern",
     "toggle_fullscreen": "(De-)aktiviere Vollbildmodus",
     "unknown": "unbekannt",
-    "unnamed": "Namenlos"
+    "unnamed": "Namenlos",
+    "wikipedia:no-url-parse": "Konnte Wikipedia Adresse nicht erkennen"
 }

lang/en.json

@@ -13,5 +13,6 @@
     "save": "Save",
     "toggle_fullscreen": "Toggle full screen mode",
     "unknown": "unknown",
-    "unnamed": "unnamed"
+    "unnamed": "unnamed",
+    "wikipedia:no-url-parse": "Could not parse Wikipedia URL"
 }

modulekit.php

@@ -14,6 +14,7 @@ $include = array(
     'src/options.php',
     'src/language.php',
     'src/ip-location.php',
+    'src/wikipedia.php',
   ),
   'css' => array(
     'style.css',

src/index.js

@@ -26,6 +26,7 @@ require('./fullscreen')
 require('./mapLayers')
 require('./twigFunctions')
 require('./categories')
+require('./wikipedia')
 
 window.onload = function () {
   initState = config.defaultView

src/wikipedia.js

@@ -0,0 +1,94 @@
+function stripLinks (dom) {
+  var current = dom.firstChild
+
+  while (current) {
+    var next = current.nextSibling
+
+    if (current.tagName === 'A') {
+      var c
+
+      while (c = current.firstChild) {
+        dom.insertBefore(c, current)
+      }
+
+      dom.removeChild(current)
+    }
+
+    current = next
+  }
+}
+
+function prepare (text) {
+  var ret = ''
+
+  var div = document.createElement('div')
+  div.innerHTML = text
+
+  var contents = div.getElementsByTagName('div')
+  for (var i = 0; i < contents.length; i++) {
+    if (contents[i].id === 'mw-content-text') {
+      var content = contents[i]
+      break
+    }
+  }
+
+  if (!content) {
+    return null
+  }
+
+  var p = content.getElementsByTagName('p')
+  if (!p.length) {
+    return null
+  }
+
+  p = p[0]
+  stripLinks(p)
+
+  return p.innerHTML
+}
+
+function get (value, callback) {
+  ajax('wikipedia',
+    {
+      page: value,
+      lang: lang
+    },
+    function (result) {
+      if (!result.content) {
+        callback('error', null)
+      }
+
+      callback(null, prepare(result.content))
+    }
+  )
+}
+
+register_hook('show-details', function (data, category, dom, callback) {
+  var ob = data.object
+
+  if (!('wikipedia' in ob.tags)) {
+    return
+  }
+
+  var block = document.createElement('div')
+  block.className = 'loading'
+  dom.appendChild(block)
+
+  var h = document.createElement('h3')
+  h.appendChild(document.createTextNode(lang('tag:wikipedia')))
+  block.appendChild(h)
+
+  get(ob.tags.wikipedia, function (err, text) {
+    if (!text) {
+      block.appendChild(document.createTextNode(lang('wikipedia:no-url-parse')))
+    }
+
+    var div = document.createElement('div')
+    div.innerHTML = text
+    block.appendChild(div)
+
+    block.className = ''
+
+    callback(err)
+  })
+})

src/wikipedia.php

@@ -0,0 +1,17 @@
+<?php
+function ajax_wikipedia ($param) {
+  if (preg_match("/^([^:]+):(.*)$/", $param['page'], $m)) {
+    $wp_lang = $m[1];
+    $wp_page = $m[2];
+  }
+
+  if (!isset($wp_lang) || !isset($wp_page)) {
+    return false;
+  }
+
+  $wp_url = "https://{$wp_lang}.wikipedia.org/wiki/" . urlencode(strtr($wp_page, array(" " => "_")));
+
+  return array(
+    'content' => file_get_contents($wp_url),
+  );
+}