shimmie2/core/imageboard/misc.php

<?php
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
* Misc functions                                                            *
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/**
 * Move a file from PHP's temporary area into shimmie's image storage
 * hierarchy, or throw an exception trying.
 *
 * @throws UploadException
 */
function move_upload_to_archive(DataUploadEvent $event): void
{
    $target = warehouse_path("images", $event->hash);
    if (!@copy($event->tmpname, $target)) {
        $errors = error_get_last();
        throw new UploadException(
            "Failed to copy file from uploads ({$event->tmpname}) to archive ($target): ".
            "{$errors['type']} / {$errors['message']}"
        );
    }
}

/**
 * Add a directory full of images
 *
 * #return string[]
 */
function add_dir(string $base): array
{
    $results = [];

    foreach (list_files($base) as $full_path) {
        $short_path = str_replace($base, "", $full_path);
        $filename = basename($full_path);

        $tags = path_to_tags($short_path);
        $result = "$short_path (".str_replace(" ", ", ", $tags).")... ";
        try {
            add_image($full_path, $filename, $tags);
            $result .= "ok";
        } catch (UploadException $ex) {
            $result .= "failed: ".$ex->getMessage();
        }
        $results[] = $result;
    }

    return $results;
}

function add_image(string $tmpname, string $filename, string $tags): void
{
    assert(file_exists($tmpname));

    $pathinfo = pathinfo($filename);
    if (!array_key_exists('extension', $pathinfo)) {
        throw new UploadException("File has no extension");
    }
    $metadata = [];
    $metadata['filename'] = $pathinfo['basename'];
    $metadata['extension'] = $pathinfo['extension'];
    $metadata['tags'] = Tag::explode($tags);
    $metadata['source'] = null;
    $event = new DataUploadEvent($tmpname, $metadata);
    send_event($event);
    if ($event->image_id == -1) {
        throw new UploadException("File type not recognised");
    }
}

/**
 * Given a full size pair of dimensions, return a pair scaled down to fit
 * into the configured thumbnail square, with ratio intact
 *
 * #return int[]
 */
function get_thumbnail_size(int $orig_width, int $orig_height): array
{
    global $config;

    if ($orig_width === 0) {
        $orig_width = 192;
    }
    if ($orig_height === 0) {
        $orig_height = 192;
    }

    if ($orig_width > $orig_height * 5) {
        $orig_width = $orig_height * 5;
    }
    if ($orig_height > $orig_width * 5) {
        $orig_height = $orig_width * 5;
    }

    $max_width  = $config->get_int('thumb_width');
    $max_height = $config->get_int('thumb_height');

    $xscale = ($max_height / $orig_height);
    $yscale = ($max_width / $orig_width);
    $scale = ($xscale < $yscale) ? $xscale : $yscale;

    if ($scale > 1 && $config->get_bool('thumb_upscale')) {
        return [(int)$orig_width, (int)$orig_height];
    } else {
        return [(int)($orig_width*$scale), (int)($orig_height*$scale)];
    }
}