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Pepperminty-Wiki/modules/feature-upload.php

121 lines
4.4 KiB
PHP

<?php
register_module([
"name" => "Uploader",
"version" => "0.1",
"author" => "Starbeamrainbowlabs",
"description" => "Adds the ability to upload files to Pepperminty Wiki. Uploaded files act as pages and have the special 'File:' prefix.",
"id" => "feature-upload",
"code" => function() {
add_action("upload", function() {
global $settings;
switch($_SERVER["REQUEST_METHOD"])
{
case "GET":
// Send upload page
if($settings->upload_enabled && $env->is_logged_in)
exit(page_renderer::render("Upload - $settings->sitename", "<p>Select an image below, and then type a name for it in the box. This server currently supports uploads up to " . get_max_upload_size() . " in size.</p>
<p>$settings->sitename currently supports uploading of the following file types: " . implode(", ", $settings->upload_allowed_file_types) . ".</p>
<form method='post' action='?action=upload' enctype='multipart/form-data'>
<label for='file'>Select a file to upload.</label>
<input type='file' name='file' />
<br />
<label for='filename'>File Name:</label>
<input type='text' name='filename' />
<br />
<input type='submit' value='Upload' />
</form>"));
else
exit(page_renderer::render("Error - Upload - $settings->sitename", "<p>$settings->sitename does not currently have uploads enabled, or you do not currently have permission to upload files because you are not logged in. <a href='javascript:history.back();'>Go back</a>.</p>"));
break;
case "POST":
// Recieve file
if(!$settings->allow_uploads)
{
unlink($_FILES["file"]["tmp_name"]);
http_response_code(412);
exit(page_renderer::render("Upload failed - $settings->sitename", "<p>Your upload couldn't be processed because uploads are currently disabled on $settings->sitename. <a href='index.php'>Go back to the main page</a>.</p>"));
}
if(!$env->is_logged_in)
{
unlink($_FILES["file"]["tmp_name"]);
http_response_code(401);
exit(page_renderer::render("Upload failed - $settings->sitename", "<p>Your upload couldn't be processed because you are not logged in.</p><p>Try <a href='?action=login&returnto=" . rawurlencode("?action=upload") . "'>logging in</a> first."));
}
// Calculate the target filename, removing any characters we
// are unsure about.
$target_filename = preg_replace("/[^a-z0-9\-_]/i", "", $_POST["filename"]);
$extra_data = [];
$imagesize = getimagesize($_FILES["file"]["tmp_name"], $extra_data);
echo("Raw file information: ");
var_dump($_FILES);
echo("Image sizing information: ");
var_dump($imagesize);
echo("Extra embedded information: ");
var_dump($extra_data);
unlink($_FILES["file"]["tmp_name"]);
break;
}
});
add_action("preview", function() {
global $settings;
// todo render a preview here
/*
* size (image outputs only, possibly width / height)
* 1-2048 (configurable)
* filetype
* either a mime type or 'native'
*/
});
page_renderer::register_part_preprocessor(function(&$parts) {
// Todo add the preview to the top o fthe page here, but onyl if the current action is view and we are on a page prefixed with file:
});
}
]);
//// Pair of functions to calculate the actual maximum upload size supported by the server
//// Lifted from Drupal by @meustrus from Stackoverflow. Link to answer:
//// http://stackoverflow.com/a/25370978/1460422
// Returns a file size limit in bytes based on the PHP upload_max_filesize
// and post_max_size
function get_max_upload_size()
{
static $max_size = -1;
if ($max_size < 0) {
// Start with post_max_size.
$max_size = parse_size(ini_get('post_max_size'));
// If upload_max_size is less, then reduce. Except if upload_max_size is
// zero, which indicates no limit.
$upload_max = parse_size(ini_get('upload_max_filesize'));
if ($upload_max > 0 && $upload_max < $max_size) {
$max_size = $upload_max;
}
}
return $max_size;
}
function parse_size($size) {
$unit = preg_replace('/[^bkmgtpezy]/i', '', $size); // Remove the non-unit characters from the size.
$size = preg_replace('/[^0-9\.]/', '', $size); // Remove the non-numeric characters from the size.
if ($unit) {
// Find the position of the unit in the ordered string which is the power of magnitude to multiply a kilobyte by.
return round($size * pow(1024, stripos('bkmgtpezy', $unit[0])));
} else {
return round($size);
}
}
?>