translate_content.php

<?php

// This script is used to translate all markdown files from English to the specified languages

// You'll need your own chatgpt key to run this script
$chatgpt_key = getenv('CHATGPT_KEY');

if(empty($chatgpt_key)) {
	echo "You need to set the CHATGPT_KEY environment variable to run this script" . PHP_EOL;
	exit(1);
}

$languages = [
	'es',
	'fr',
	'lv',
	'pt',
	'de',
	'ru',
	'zh',
	'ja',
	'ko',
	'uk'
];

// pull from-date from cli args
$opts = getopt('', ['from-date:']);
$fromDate = $opts['from-date'] ?? 0;
if($fromDate) {
	$fromDate = strtotime($fromDate.' 00:00:00');
}

echo "Translating content from " . date('Y-m-d', $fromDate) . PHP_EOL;

$top_level_files = glob(__DIR__ . '/content/en/*.md');

$files = array_merge($top_level_files, glob(__DIR__ . '/content/en/**/*.md'));

// pull all markdown files our of the content/en/ folder and each subdirectory
foreach($files as $file) {
	echo "Processing ". $file . PHP_EOL;
	if(filemtime($file) < $fromDate) {
		echo "  **Skipping file because it's older than the from-date**" . PHP_EOL;
		continue;
	}
	
	foreach($languages as $languageAbbreviation) {

		$full_response = '';
		$messages = [
			[
				"role" => "system",
				"content" => "You are a gifted translator focusing on the tech space. Today you are translating documentation for a PHP Framework called Flight (so please never translate the word 'Flight' as it's the name of the framework). You are going to receive content that is like a markdown file. When you receive the content you'll translate it from english to the two letter language code that is specified. When you generate a response, you are going to ONLY send back the translated markdown content, no other replies or 'here is your translated markdown' type statements back, only the translated markdown content in markdown format. If you get a follow up response, you need to continue to markdown translation from the very character you left off at and complete the translation until the full page is done. THIS NEXT ITEM IS VERY IMPORTANT! Make sure that when you are translating any code in the markdown file that you ONLY translate the comments of the code and not the classes/methods/variables/links/urls/etc. Please don't translate any URLs or you will break my app and I will lose my job if this is not done correctly!"
			],
			[
				"role" => "user",
				"content" => "Translate the following text from English to the two letter language code of {$languageAbbreviation}:\n\n" . file_get_contents($file)
			]
		];
		do {
			$ch = curl_init('https://api.openai.com/v1/chat/completions');
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
			curl_setopt($ch, CURLOPT_POST, true);
			curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([
				"model" => "gpt-4o-mini",
				"messages" => $messages
			]));
			curl_setopt($ch, CURLOPT_HTTPHEADER, [
				'Authorization: Bearer ' . $chatgpt_key,
				'Content-Type: application/json'
			]);
			$response = curl_exec($ch);
			curl_close($ch);
			
			$response = json_decode($response, true);

			$full_response .= $response['choices'][0]['message']['content'];

			$messages[] = [
				'role' => 'assistant',
				'content' => $response['choices'][0]['message']['content']
			];

		} while($response['usage']['completion_tokens'] === 4096);

		// save the translated content to the appropriate file
		$translatedFilePath = str_replace('/en/', '/' . $languageAbbreviation . '/', $file);

		$directory = dirname($translatedFilePath);
		if(is_dir($directory) === false) {
			mkdir($directory, 0775, true);
		}
		file_put_contents($translatedFilePath, $full_response);

		echo "	Updated: " . $translatedFilePath . PHP_EOL;
	}
}