webmentions/get.php

<?php

require_once('config.php');

$target_url = $_POST['target'];

if (!isset($target_url)) {
    header($_SERVER['SERVER_PROTOCOL'] . ' 400 Bad Request');
    exit;
}

$dsn = 'mysql:dbname=' . $config['db']['name'] . ';host=' . $config['db']['host'];
$user = $config['db']['username'];
$password = $config['db']['password'];

try {
    $dbh = new PDO($dsn, $user, $password);
} catch (PDOException $e) {
    error_log('Connection failed: ' . $e->getMessage(), 4);
    exit('Err');
}

$sth = $dbh->prepare('SELECT * FROM webmentions WHERE local_url = ? ORDER BY published');

if ($sth === false) {
    error_log('Could not prepare SQL statement.');
    error_log('Error code: ' . $dbh->errorCode());
    error_log('Error info: ' . $dbh->errorInfo());
}

$res = $sth->execute(array($target_url));

if ($res === false) {
    error_log('Could not execute SQL query.');
    error_log('Error code: ' . $dbh->errorCode());
    error_log('Error info: ' . $dbh->errorInfo());
}

$data = array(
    'likes' => array(),
    'mentions' => array(),
    'replies'=> array(),
    'reposts' => array(),
    'rsvps' => array()
);

while ($row = $sth->fetch()) {
    switch($row['type']) {
        case "like":
            $data['likes'][] = $row;
            break;

        case "reply":
            $data['replies'][] = $row;
            break;

        case "repost":
            $data['reposts'][] = $row;
            break;

        case "rsvp":
            $data['rsvps'][] = $row;
            break;

        default:
            $data['mentions'][] = $row;
            break;
    }
}

$json = json_encode($data);

if ($json === false) {
    header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error');
    exit;
} else {
    header('Content-Type: application/json');
    echo $json;
}