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<?php
/*
 * MIT License
 *
 * Copyright (c) 2022- Minteck
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

header("Content-Type: text/plain");
// TODO: handle errors
$_CONFIG = json_decode(file_get_contents($_SERVER["DOCUMENT_ROOT"] . "/private/FamilineConfig.json"), true);

if (!isset($_GET['code'])) {
    die();
}

$appdata = json_decode(file_get_contents($_SERVER['DOCUMENT_ROOT'] . "/private/app.json"), true);

$crl = curl_init('https://' . $_CONFIG["Global"]["federation"]. '/auth/realms/Familine/protocol/openid-connect/token');
curl_setopt($crl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($crl, CURLINFO_HEADER_OUT, true);
curl_setopt($crl, CURLOPT_POST, true);
curl_setopt($crl, CURLOPT_HTTPHEADER, [
    "Authorization: Basic " . base64_encode($appdata["id"] . ":" . $appdata["secret"]),
    "Content-Type: application/x-www-form-urlencoded",
    "Accept: application/json"
]);
curl_setopt($crl, CURLOPT_POSTFIELDS, "grant_type=authorization_code&redirect_uri=" . urlencode("https://" . $_CONFIG["Global"]["domain"] . "/oauth/?r=" . $_GET['r']) . "&code=" . $_GET['code']);

var_dump("grant_type=authorization_code&redirect_uri=" . urlencode("https://" . $_CONFIG["Global"]["domain"] . "/oauth/?r=" . $_GET['r']) . "&code=" . $_GET['code']);
$result = curl_exec($crl);
var_dump($result);
$result = json_decode($result, true);

curl_close($crl);

if (isset($result["access_token"])) {
    $crl = curl_init('https://' . $_CONFIG["Global"]["federation"]. '/auth/realms/Familine/protocol/openid-connect/userinfo');
    curl_setopt($crl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($crl, CURLINFO_HEADER_OUT, true);
    curl_setopt($crl, CURLOPT_HTTPHEADER, [
        "Authorization: Bearer " . $result["access_token"],
        "Accept: application/json"
    ]);

    $result = curl_exec($crl);
    var_dump($result);
    $result = json_decode($result, true);

    $token = bin2hex(random_bytes(32));
    $result["login"] = $result["preferred_username"];
    $result["name_internal"] = $result["name"];
    $result["name"] = $result["family_name"] . " " . $result["given_name"];
    $result["id"] = $result["sub"];
    file_put_contents($_SERVER['DOCUMENT_ROOT'] . "/private/tokens/" . $token, json_encode($result));
    setcookie("FL_SESSION_TOKEN", $token, 0, "/", "." . $_CONFIG["Global"]["domain"], true, true);

    header("Location: https://auth.familine.minteck.org/auth/realms/Familine/X-Familine-PersistentSession/?r=" . urlencode($_GET['r']));
}