credits.php

<?php
$relPath="./pinc/";
include_once($relPath.'base.inc');
include_once($relPath.'theme.inc');

$title = _("Credits");
output_header($title);

echo "<h1>$title</h1>";

echo "<p>" . sprintf(_("This site is powered by the <a href='%s'>dproofreaders</a> source code and licensed under the GPL v2."), "https://github.com/DistributedProofreaders/dproofreaders") . "</p>";

echo "<h2>" . _("Developers") . "</h2>";

echo "<p>" . sprintf(_("This software brought to you by many volunteer developers across the world over many years. Recent developer contributions after the move to git can be seen on the project's <a href='%s'>Github Contributors page</a>."), "https://github.com/DistributedProofreaders/dproofreaders/graphs/contributors"). "</p>";

echo "<h2>" . _("Bundled Software"). "</h2>";

echo "<p>" . _("The following open source code is bundled and used with the dproofreaders code.") . "</p>";

$credit_details = load_credit_details($code_dir);
asort($credit_details);
echo "<ul>";
foreach($credit_details as $detail)
{
    echo "<li>";
    echo "<b>" . $detail["name"] . "</b><br>";
    echo "<a href='" . $detail["url"] . "'>" . $detail["url"] . "</a><br>";
    echo "<a href='" . $detail["license_url"] . "'>" . $detail["license"] . "</a>";
    echo "</li>";
}
echo "</ul>";

#----------------------------------------------------------------------------

function load_credit_details($code_dir)
{
    $credit_details = [];
    $dir_iter = new PermissiveRecursiveDirectoryIterator($code_dir);
    $files = new RecursiveIteratorIterator($dir_iter);
    foreach($files as $file_info)
    {
        $file = $file_info->getPathname();
        if(basename($file) != "details.json")
            continue;
        $details = json_decode(file_get_contents($file), TRUE);
        if(isAssoc($details))
            $details = [ $details ];
        foreach($details as $detail)
        {
            $credit_details[$detail["name"]] = $detail;
        }
    }
    return $credit_details;
}

# Ignore exceptions when iterating over the directory, such as permission
# errors from SETUP/
# from antennen at https://www.php.net/manual/en/class.recursivedirectoryiterator.php
class PermissiveRecursiveDirectoryIterator extends RecursiveDirectoryIterator {
    function getChildren() {
        try {
            return new PermissiveRecursiveDirectoryIterator($this->getPathname());
        } catch(UnexpectedValueException $e) {
            return new RecursiveArrayIterator(array());
        }
    }
}

# https://stackoverflow.com/questions/173400/how-to-check-if-php-array-is-associative-or-sequential
function isAssoc(array $arr)
{
    if (array() === $arr) return false;
    return array_keys($arr) !== range(0, count($arr) - 1);
}