DOCS Update readme to include a screenshot, configuration and cleanup…

… examples

* Add confirmation to the "clear all" button

README.md

@@ -18,15 +18,64 @@ Install with composer:
 composer require silverleague/logviewer
 ```
 
-## Configuration
-
 This is a plug and play module. Simply install, then run a `dev/build` and flush:
 
 ```shell
 sake dev/build flush=1
 ```
 
-You will now see a "Logs" tab in the CMS.
+You will now see a "Logs" tab in the CMS:
+
+![Preview](docs/images/preview-list.jpg)
+
+## Configuration
+
+There are a few configuration options for this module. These can be modified in your YAML configuration, for example - `mysite/_config/logviewer.yml`:
+
+```yml
+---
+Name: mysitelogviewer
+After:
+  - '#logviewerconfig'
+---
+# Configuration for the cleanup task
+LogViewer:
+  # Whether the cleanup task should be run by a cron task (you need to figure the cron yourself)
+  # Type: bool
+  cron_enabled: true
+  # How often the cron should run (default: 4am daily)
+  # Type: string (a cron expression)
+  cron_schedule: 0 4 * * *
+  # The maximum age in days for a LogEntry before it will be removed by the cleanup task
+  # Type: int
+  max_log_age: 30
+  # Which Monolog\Logger levels (numeric) to start handling from (see class for examples)
+  minimum_log_level: 300 # WARNING
+```
+
+While this is a copy of the default configuration, if the default configuration hadn't already existed or was different then this configuration would tell LogViewer that you _do_ want it to clean up log entries older than 30 days on a cron schedule at 4am each day. You also only want to keep logs that are "WARNING" level or higher (see `Monolog\Logger` for all available levels).
+
+### Testing
+
+There is an [example `BuildTask` in this repository](docs/examples/CreateLogsTask.php) which you can use to generate one of every PSR-3 log level for the sake of testing.
+
+The screenshot above is a result of having run it, using the configuration in the example above.
+
+## Cleaning up
+
+As mentioned previously, if you have an actively running `silverstripe/crontask` module already, the `RemoveOldLogEntriesTask` will run by default at 4am every morning and will remove log entries that are older than 30 days.
+
+You can run the task manually from the command line using `sake` or [`ssconsole`](https://github.com/silverleague/silverstripe-console):
+
+```shell
+# With sake:
+sake dev/tasks/RemoveOldLogEntriesTask
+
+# With ssconsole:
+ssconsole dev:tasks:remove-old-log-entries
+```
+
+You can also remove **all log entries entirely** from the Logs interface in the admin area, by clicking "Clear all". This will clear all logs, not just those older than 30 days.
 
 ## Support
 

_config/config.yml

@@ -13,10 +13,11 @@ SilverStripe\Core\Injector\Injector:
 # Configuration for the cleanup task
 LogViewer:
   # Whether the cron functionality should run. This does not affect use as a BuildTask.
+  # Note: you need to configure silverstripe/crontask yourself.
   cron_enabled: true
   # How often the cron should run (default: 4am daily)
   cron_schedule: 0 4 * * *
   # The maximum age in days for a LogEntry before it will be removed
   max_log_age: 30
-  # Which Monolog\Logger levels (numberic) to start handling from (see class for examples)
+  # Which Monolog\Logger levels (numeric) to start handling from (see class for examples)
   minimum_log_level: 300 # WARNING

docs/examples/CreateLogsTask.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace SilverLeague\LogViewer\Task;
+
+use SilverStripe\Core\Injector\Injector;
+use SilverStripe\Dev\BuildTask;
+
+/**
+ * This is purely for demo purposes, and will log a message at every level for local testing or demo purposes.
+ *
+ * @package silverstripe-logviewer
+ * @author  Robbie Averill <[email protected]>
+ */
+class CreateLogsTask extends BuildTask
+{
+    /**
+     * {@inheritDoc}
+     */
+    private static $segment = 'CreateLogsTask';
+
+    /**
+     * {@inheritDoc}
+     */
+    public function run($request)
+    {
+        $logger = Injector::inst()->get('Logger');
+        $logger->addDebug('Detailed debug information');
+        $logger->addInfo('Interesting events. Examples: User logs in, SQL logs.');
+        $logger->addNotice('Uncommon events');
+        $logger->addWarning(
+            'Exceptional occurrences that are not errors. Examples: Use of deprecated APIs, poor use of an API, '
+            . 'undesirable things that are not necessarily wrong.'
+        );
+        $logger->addError('Runtime errors');
+        $logger->addCritical('Critical conditions. Example: Application component unavailable, unexpected exception.');
+        $logger->addAlert(
+            'Action must be taken immediately. Example: Entire website down, database unavailable, etc. '
+            . 'This should trigger the SMS alerts and wake you up.'
+        );
+        $logger->addEmergency('Urgent alert.');
+        echo 'Finito.', PHP_EOL;
+    }
+}

src/Forms/GridField/GridFieldClearAllButton.php

@@ -41,7 +41,7 @@ public function getHTMLFragments($gridField)
     {
         $button = GridField_FormAction::create($gridField, 'clear', 'Clear all', 'clear', null);
         $button->setAttribute('data-icon', 'clear-all-logs');
-        $button->addExtraClass('font-icon-trash-bin action_clear');
+        $button->addExtraClass('font-icon-trash-bin action_clear action action-delete');
         $button->setForm($gridField->getForm());
 
         return [$this->targetFragment => '<p class="grid-clear-all-button">' . $button->Field() . '</p>'];