Customise monolog formatter to exclude line breaks

src/ServiceProvider.php

@@ -6,6 +6,7 @@
 use MityDigital\StatamicLogger\Console\Commands\ListSubscribedEventsCommand;
 use MityDigital\StatamicLogger\Http\CP\Controllers\StatamicLoggerController;
 use MityDigital\StatamicLogger\Subscribers\StatamicLoggerEventSubscriber;
+use MityDigital\StatamicLogger\Support\LoggerFormatter;
 use MityDigital\StatamicLogger\Support\StatamicLogger;
 use Statamic\Facades\Utility;
 use Statamic\Providers\AddonServiceProvider;
@@ -99,6 +100,7 @@ protected function configureLogger($channel = 'statamic-logger')
                 'path' => storage_path($path.DIRECTORY_SEPARATOR.$filename),
                 'level' => 'debug',
                 'days' => config('statamic-logger.storage.retention', 7),
+                'tap' => [LoggerFormatter::class],
             ]);
         }
     }

src/Support/LoggerFormatter.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace MityDigital\StatamicLogger\Support;
+
+use Illuminate\Log\Logger;
+
+class LoggerFormatter
+{
+    /**
+     * Customize the given logger instance.
+     */
+    public function __invoke(Logger $logger): void
+    {
+        foreach ($logger->getHandlers() as $handler) {
+            // get the formatter, and disable inline breaks
+            $formatter = $handler->getFormatter();
+            $formatter->allowInlineLineBreaks(false);
+
+            // re-set the formatter
+            $handler->setFormatter($formatter);
+        }
+    }
+}

tests/Support/LoggerFormatterTest.php

@@ -0,0 +1,40 @@
+<?php
+
+use Carbon\Carbon;
+use Illuminate\Support\Facades\Log;
+use MityDigital\StatamicLogger\Facades\StatamicLogger;
+use MityDigital\StatamicLogger\Support\StatamicLoggerReader;
+
+it('stores a log entry with line breaks in a single line', function () {
+
+    // set today
+    $today = Carbon::now()->format('Y-m-d');
+
+    // remove the log for today
+    unlink(storage_path(StatamicLogger::getStoragePath().DIRECTORY_SEPARATOR.StatamicLogger::getStorageFilename().'-'.$today.'.log'));
+
+    // log a simple string
+    Log::channel('statamic-logger')
+        ->info(
+            json_encode([
+                'lines' => 'no lines here',
+            ])
+        );
+
+    // log a string with line breaks
+    Log::channel('statamic-logger')
+        ->info(
+            json_encode([
+                'lines' => "a string with\nline breaks",
+            ])
+        );
+
+    // read the last line of the log
+    $reader = app(StatamicLoggerReader::class);
+    $data = $reader->paginate($today, 1, 10);
+
+    expect($data)
+        ->toHaveCount(2)
+        ->and($data[0])->toContain('{"lines":"a string with\nline breaks"}')
+        ->and($data[1])->toContain('{"lines":"no lines here"}');
+});