S allius/issue394 (#400)

* store logging path in Config class

* rename template files and page files

* jump to referer page

- after changing the language, we jump to
  the referer page, if the attribute exists

* build and send list of log-files

* rename Download page into Log files

* initialize log-path in test config

* improve dashboard unit tests

 - add log file tests
 - check content-languages after language switch

* initialize config structure for log-file tests

* add test log file to project

* add sub_dir to test log path

- non files must be skipped. To test this we add
  a sub directory to the test log directory

* add german translations

* set quart debug flag for debug versions

* update changelog

app/src/web/log_files.py

@@ -0,0 +1,52 @@
+from quart import render_template
+from quart_babel import format_datetime, format_decimal
+from quart.helpers import send_from_directory
+from werkzeug.utils import secure_filename
+from cnf.config import Config
+import os
+
+from . import web
+
+
+def _get_file(file):
+    '''build one row for the connection table'''
+    entry = {}
+    entry['name'] = file.name
+    stat = file.stat()
+    entry['size'] = format_decimal(stat.st_size)
+    entry['date'] = stat.st_mtime
+    entry['created'] = format_datetime(stat.st_ctime, format="short")
+    entry['modified'] = format_datetime(stat.st_mtime, format="short")
+    return entry
+
+
+def get_list_data():
+    '''build the connection table'''
+    file_list = []
+    with os.scandir(Config.get_log_path()) as it:
+        for entry in it:
+            if entry.is_file():
+                file_list.append(_get_file(entry))
+
+    file_list.sort(key=lambda x: x['date'], reverse=True)
+    return file_list
+
+
+@web.route('/file-fetch')
+async def file_fetch():
+    data = {
+        "update-time": format_datetime(format="medium"),
+    }
+    data["file-list"] = await render_template('templ_log_files_list.html.j2',
+                                              dir_list=get_list_data())
+
+    data["notes-list"] = await render_template('templ_notes_list.html.j2')
+    return data
+
+
+@web.route('/send-file/<file>')
+async def send(file):
+    return await send_from_directory(
+        directory=Config.get_log_path(),
+        file_name=secure_filename(file),
+        as_attachment=True)