<?php

/**

* Generates log stream configurations for a legacy project based on a configuration file.

*

* @param string $configFilePath Path to the configuration file.

* @return array An array of log stream configurations. Returns an empty array on error.

*/

function generateLogStreamConfigs(string $configFilePath): array

{

if (!file_exists($configFilePath)) {

error_log("Error: Configuration file not found: $configFilePath");

return [];

}

$config = json_decode(file_get_contents($configFilePath), true);

if ($config === null) {

error_log("Error: Failed to decode JSON from configuration file: $configFilePath");

return [];

}

$logStreamConfigs = [];

if (isset($config['log_streams']) && is_array($config['log_streams'])) {

foreach ($config['log_streams'] as $streamConfig) {

if (is_array($streamConfig)) {

$logStreamConfigs[] = [

'name' => $streamConfig['name'] ?? 'default', // Get stream name, default to 'default' if missing

'level' => $streamConfig['level'] ?? 'info', // Get log level, default to 'info'

'target' => $streamConfig['target'] ?? 'file', // Get target, default to 'file'

'file' => $streamConfig['file'] ?? null, // Path to file, can be null

'format' => $streamConfig['format'] ?? '%time %level %message%', //Log format

'max_size' => $streamConfig['max_size'] ?? 1024 * 1024, //Max file size in bytes

'max_files' => $streamConfig['max_files'] ?? 5, //Max number of files to rotate

];

} else {

error_log("Warning: Invalid log stream configuration found: " . json_encode($streamConfig));

}

}

} else {

error_log("Warning: 'log_streams' section not found or is not an array in config file: $configFilePath");

}

return $logStreamConfigs;

}

//Example usage:

/*

$configs = generateLogStreamConfigs('config.json');

if (!empty($configs)) {

echo "<pre>";

print_r($configs);

echo "</pre>";

} else {

echo "No log stream configurations generated.";

}

*/

?>