improve readme, improve first log

plugins/barcode-generator/README.md

@@ -4,7 +4,8 @@ This plugin generates SVG image of one or two dimensional barcode which can be i
 ## Templates implementation
 You can add barcode image into template code e.g.:
 ``<img src="https://www.example.com/crm/_plugins/barcode-generator/public.php?token=USECONFIGURATIONTOKEN&code=DI{{ invoice.number }}{{ totals.totalRaw }}&type=QRCODE&width=200&height=200&color=black">``
-> Server must be secured with valid certificate for https request. 
+> Make sure you have valid SSL certificate, otherwise the barcode won't load when used in PDF or email templates.  
+> In PDF templates only, you can use `http://localhost/crm/...` as an alternative.
 
 ## Required parameters
 - `token` - Security token from the plugin configuration in the CRM

plugins/barcode-generator/src/hook_install.php

@@ -2,20 +2,31 @@
 
 declare(strict_types=1);
 
-use Monolog\Handler\StreamHandler;
-use Monolog\Logger;
 use UBarcode\Service\TokenInstaller;
+use Ubnt\UcrmPluginSdk\Service\PluginConfigManager;
 use Ubnt\UcrmPluginSdk\Service\PluginLogManager;
+use Ubnt\UcrmPluginSdk\Service\UcrmOptionsManager;
 
 chdir(__DIR__);
 
 require __DIR__ . '/vendor/autoload.php';
 
-$logger = new Logger('UBarcode');
-$logger->pushHandler(new StreamHandler('data/plugin.log'));
-
-$logManager = PluginLogManager::create();
-
 (new TokenInstaller())->install();
 
-$logger->info('Security token has been generated. Use it as a part of request string.');
+$configManager = PluginConfigManager::create();
+$config = $configManager->loadConfig();
+$ucrmOptionsManager = UcrmOptionsManager::create();
+$ucrmOptions = $ucrmOptionsManager->loadOptions();
+
+$logManager = PluginLogManager::create();
+$logManager->appendLog('Security token has been automatically generated. You must use it as a part of the URL.');
+$logManager->appendLog('');
+$logManager->appendLog('Example usage:');
+$logManager->appendLog(
+    sprintf(
+        '<img src="%s_plugins/barcode-generator/public.php?token=%s&code=YOUR_CONTENTS&type=QRCODE&width=200&height=200&color=black">',
+        $ucrmOptions->ucrmPublicUrl,
+        $config['token'] ?? ''
+    )
+);
+$logManager->appendLog('');