smtech / canvashack

canvashack.css.php

<?php

For compatibility and reusability of your code, PSR1 recommends that a file should introduce either new symbols (like classes, functions, etc.) or have side-effects (like outputting something, or including other files), but not both at the same time. The first symbol is defined on line 10 and the first side effect is on line 3.

header("Content-Type: text/css");

/* don't cache me! */
header("Cache-Control: no-cache, no-store, must-revalidate"); // HTTP 1.1
header("Pragma: no-cache"); // HTTP 1.0
header("Expires: 0"); // Proxies

define('IGNORE_LTI', true);

require_once 'common.inc.php';

use \Battis\AppMetadata;

$location = (!empty($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : $_REQUEST['location']);

function canonicalNamespaceId($id)
{
    return preg_replace('/[^a-z0-9]+/i', '_', $id);
}

function canvasHackNamespace($id, $javascript)
{
    return preg_replace(
        '/^(\s*var\s+)?canvashack\s*=\s*{\n*(.*)};/is',
        canonicalNamespaceId($id) . ": {\n$2\n}",
        $javascript
    );
}

$canvashacks = array();
$enabledPages = $toolbox->mysql_query("
    SELECT p.*
        FROM `pages` AS p
        INNER JOIN `canvashacks` AS c
            ON c.`id` = p.`canvashack`
        WHERE
            c.`enabled` = TRUE
        ORDER BY
            p.`include` DESC
");

while ($page = $enabledPages->fetch_assoc()) {

This code seems to be duplicated across your project.

    if ((!empty($page['url']) && $page['url'] == $location) ||
        (!empty($page['pattern']) && preg_match($page['pattern'], $location))) {
        if ($page['include']) {
            $canvashacks[$page['canvashack']] = true;
        } else {
            unset($canvashacks[$page['canvashack']]);
        }
    }
}

$css = array();
if (($applicableCSS = $toolbox->mysql_query("

This code seems to be duplicated across your project.

    SELECT *
        FROM `css`
        WHERE
            `canvashack` = '" . implode("' OR `canvashack` = '", array_keys($canvashacks)) . "'
")) == false) {
    exit;
}
while ($entry = $applicableCSS->fetch_assoc()) {
    $css[$entry['canvashack']] = shell_exec("php \"{$entry['path']}\" \"{$location}\" 2>&1");
}

foreach ($css as $id => $stylesheet) {
    $plugin = new AppMetadata($toolbox->getMySQL(), $id);
    echo "/* CanvasHack ID $id begin */\n";
    echo $plugin->derivedValues($stylesheet);
    echo "\n/* CanvasHack ID $id end */\n\n";
}