<?php

// conversion from the letter ID to the datetime+rank ID
define("CODE", "aQwZsXeDcRfVtGbYhNuJiKoLpMAqWzSxEdCrFvTgByHnUjIkOlPm");
define("MYSQL_USER", "{{ retrodojo_maria_user }}");
define("MYSQL_PASSWORD", "{{ retrodojo_maria_password }}");
define("MYSQL_DATABASE", "{{ retrodojo_maria_database }}");

function decode_article($code) {
	$id = 0;
	foreach(str_split($code) as $key => $value) {
		$transposed = strrpos(CODE, $value);
		$id += 10 ** (3 - $key) * ($transposed % 10);
	}
	return $id;
}

function get_current_guid_from_historical_id_for($conn, $article_type, $hist_id) {
	$guid = "";
	$query = <<<QUERY
SELECT guid
FROM wp_dojohistoricalid
INNER JOIN wp_posts ON wp_dojohistoricalid.current_id = wp_posts.ID
INNER JOIN wp_terms ON wp_dojohistoricalid.term_id = wp_terms.term_id
WHERE slug = "$article_type"
AND historical_id = $hist_id;
QUERY;
	$result = mysqli_query($conn, $query);

	if (mysqli_num_rows($result) == 1) {
		$row = mysqli_fetch_row($result);
		$guid = $row[0];
	}

	return $guid;
}

// get the article ID no matter what
if (isset($_GET["id"])) {
	$article_id = substr($_GET["id"], 0, 4);
}

if (preg_match("/\/index\.php\/(.+)\/(.+)\/([A-Za-z]{4})-/", $_SERVER["DOCUMENT_URI"], $matches)) {
	$article_id = $matches[3];
}

// connect to MySQL via WP login
$conn = mysqli_connect("localhost", MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE);

if (isset($article_id)) {
	if (preg_match("/\/nouvelles\//", $_SERVER["DOCUMENT_URI"])) {
	/*
	This part of the script decodes the Nouvelles ID and search the current DB for the right article
	*/
		$decoded_day = strrpos(CODE, $article_id[0]);
		$decoded_month = strrpos(CODE, $article_id[1]);
		$decoded_year = strrpos(CODE, $article_id[2]) + 2000;
		$decoded_rank = strrpos(CODE, $article_id[3]);

		$query = <<<QUERY
	SELECT guid
	FROM wp_posts INNER JOIN wp_term_relationships ON wp_posts.ID = wp_term_relationships.object_id
	WHERE term_taxonomy_id = 3
	AND YEAR(post_date) = $decoded_year
	AND MONTH(post_date) = $decoded_month
	AND DAY(post_date) = $decoded_day
	ORDER BY post_date;
	QUERY;
		$result = mysqli_query($conn, $query);
		mysqli_data_seek($result, $decoded_rank - 1);
		$row = mysqli_fetch_row($result);

		header("Location: " . str_replace("http:", "https:", $row[0]), true, 301);
	} elseif(preg_match("/\/nezvroses\//", $_SERVER["DOCUMENT_URI"])) {
		$current_guid = get_current_guid_from_historical_id_for($conn, "nezvroses", decode_article($article_id));
		if (!empty($current_guid)) {
			header("Location: " . str_replace("http:", "https:", $current_guid), true, 301);
		} else {
			http_response_code(404);
		}
	} elseif(preg_match("/\/analyses\//", $_SERVER["DOCUMENT_URI"])) {
		$current_guid = get_current_guid_from_historical_id_for($conn, "analyses", decode_article($article_id));
		if (!empty($current_guid)) {
			header("Location: " . str_replace("http:", "https:", $current_guid), true, 301);
		} else {
			http_response_code(404);
		}
	} elseif(preg_match("/\/editoriaux\//", $_SERVER["DOCUMENT_URI"])) {
		$current_guid = get_current_guid_from_historical_id_for($conn, "editos", decode_article($article_id));
		if (!empty($current_guid)) {
			header("Location: " . str_replace("http:", "https:", $current_guid), true, 301);
		} else {
			http_response_code(404);
		}
	} elseif(preg_match("/\/apercus\//", $_SERVER["DOCUMENT_URI"])) {
		$current_guid = get_current_guid_from_historical_id_for($conn, "apercus", decode_article($article_id));
		if (!empty($current_guid)) {
			header("Location: " . str_replace("http:", "https:", $current_guid), true, 301);
		} else {
			http_response_code(404);
		}
	} else {
		// any other matches (apercus, etc…) will be sent a 404 for now
		http_response_code(404);
	}
} else {
	header("Location: https://www.nintendojo.fr", true, 307);
}

mysqli_close($conn);