From c3cc24be125564b3ab27b8cdc217bf1e9ffdcd48 Mon Sep 17 00:00:00 2001
From: Bnyro <bnyro@tutanota.com>
Date: Sat, 14 Oct 2023 15:04:34 +0200
Subject: [PATCH] [feat] engine: implementation of destatis

---
 searx/engines/destatis.py | 68 +++++++++++++++++++++++++++++++++++++++
 searx/settings.yml        |  5 +++
 2 files changed, 73 insertions(+)
 create mode 100644 searx/engines/destatis.py

diff --git a/searx/engines/destatis.py b/searx/engines/destatis.py
new file mode 100644
index 000000000..2d19b340f
--- /dev/null
+++ b/searx/engines/destatis.py
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+# lint: pylint
+"""DeStatis
+"""
+
+from urllib.parse import urlencode
+from lxml import html
+from searx.utils import eval_xpath, eval_xpath_list, extract_text
+
+about = {
+    'website': 'https://www.destatis.de',
+    'official_api_documentation': 'https://destatis.api.bund.dev/',
+    'use_official_api': False,
+    'require_api_key': False,
+    'results': 'HTML',
+    'language': 'de',
+}
+
+categories = []
+paging = True
+
+base_url = "https://www.destatis.de"
+search_url = f"{base_url}/SiteGlobals/Forms/Suche/Expertensuche_Formular.html"
+
+# pylint: disable-next=line-too-long
+results_xpath = '//div[contains(@class, "l-content-wrapper")]/div[contains(@class, "row")]/div[contains(@class, "column")]/div[contains(@class, "c-result"){extra}]'
+results_xpath_filter_recommended = " and not(contains(@class, 'c-result--recommended'))"
+url_xpath = './/a/@href'
+title_xpath = './/a/text()'
+date_xpath = './/a/span[contains(@class, "c-result__date")]'
+content_xpath = './/div[contains(@class, "column")]/p/text()'
+doctype_xpath = './/div[contains(@class, "c-result__doctype")]/p'
+
+
+def request(query, params):
+    args = {
+        'templateQueryString': query,
+        'gtp': f"474_list%3D{params['pageno']}",
+    }
+    params['url'] = f"{search_url}?{urlencode(args)}"
+    return params
+
+
+def response(resp):
+    results = []
+
+    dom = html.fromstring(resp.text)
+
+    # filter out suggested results on further page because they're the same on each page
+    extra_xpath = results_xpath_filter_recommended if resp.search_params['pageno'] > 1 else ''
+    res_xpath = results_xpath.format(extra=extra_xpath)
+
+    for result in eval_xpath_list(dom, res_xpath):
+        doctype = extract_text(eval_xpath(result, doctype_xpath))
+        date = extract_text(eval_xpath(result, date_xpath))
+
+        metadata = [meta for meta in (doctype, date) if meta != ""]
+
+        results.append(
+            {
+                'url': base_url + "/" + extract_text(eval_xpath(result, url_xpath)),
+                'title': extract_text(eval_xpath(result, title_xpath)),
+                'content': extract_text(eval_xpath(result, content_xpath)),
+                'metadata': ', '.join(metadata),
+            }
+        )
+
+    return results
diff --git a/searx/settings.yml b/searx/settings.yml
index 1b511c2c9..4437fb3a9 100644
--- a/searx/settings.yml
+++ b/searx/settings.yml
@@ -532,6 +532,11 @@ engines:
     shortcut: dz
     disabled: true
 
+  - name: destatis
+    engine: destatis
+    shortcut: destat
+    disabled: true
+
   - name: deviantart
     engine: deviantart
     shortcut: da