docs: logging component

docs/configurations/index.md

@@ -29,6 +29,15 @@ proxy configuration, and logging level configuration.
 | restHandlerClass                                                      | string | TBD                                                                                                                                                                                                |
 | customTab                                                             | Object | This property allows you to enable the [custom tab](../custom_ui_extensions/custom_tab.md) feature.                                                                                                |
 
+### Tab components
+
+Instead of specifying a tab from scratch with above fields, you can add a predefined
+tab.
+
+Currently available tab components:
+
+- [Logging tab](./logging.md)
+
 ### Usage
 
 ```json
@@ -49,6 +58,9 @@ proxy configuration, and logging level configuration.
             "options": {
                 "saveValidator": ""
             }
+        },
+        {
+            "type": "loggingTab"
         }
     ]
 }

docs/configurations/logging.md

@@ -0,0 +1,62 @@
+The logging tab is a predefined component that allows to create the page for changing
+the log level. It is added in the `pages.configuration.tabs` array
+
+![image](../images/configuration/logging_tab.png)
+
+### Minimal definition
+
+```json
+{
+  "type": "loggingTab"
+}
+```
+
+This creates the tab seen in the image above with log levels:
+DEBUG, INFO, WARNING, ERROR, CRITICAL. INFO is the default level.
+The value is saved in `loglevel` config parameter.
+
+### Usage
+
+It is placed just like every other configuration tab.
+
+```json
+{
+    "pages": {
+        "configuration": {
+            "tabs": [
+              {
+                "type": "loggingTab"
+              }
+            ],
+            "title": "Configuration",
+            "description": "..."
+        }
+    }
+}
+```
+
+### Optional Fields
+
+| Field Name   | Description                                                                                     |
+|--------------|-------------------------------------------------------------------------------------------------|
+| name         | Tab name. Default is `logging`                                                                  |
+| title        | Tab title. Default is `Logging`                                                                 |
+| label        | Label text displayed next to the log level dropdown. Default is `Log level`                     |
+| field        | Configuration field name. Default is `loglevel`                                                 |
+| levels       | List of all possible log levels. Default is `["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"]` |
+| defaultLevel | Default log level at the beginning. Default is `INFO`                                           |
+
+### Example
+
+```json
+{
+    "type": "loggingTab",
+    "name": "logging_other",
+    "title": "Logging other",
+    "label": "Log level",
+    "field": "loglevel",
+    "levels": ["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"],
+    "defaultLevel": "INFO"
+}
+```
+

mkdocs.yml

@@ -40,6 +40,7 @@ nav:
   - Configuration:
       - "configurations/index.md"
       - Introduction: "configurations/index.md"
+      - Logging: "configurations/logging.md"
       - Proxy: "configurations/proxy.md"
   - Dashboard: "dashboard.md"
   - Entity: