resourcespace/plugins/format_chooser/hooks/all.php

<?php

include_once __DIR__ . "/../include/utility.php";

function HookFormat_chooserAllGetdownloadurl($ref, $size, $ext, $page = 1, $alternative = -1, $usage = -1, $usagecomment = "")
    {
    global $baseurl_short,$imagemagick_preserve_profiles, $format_chooser_input_formats, $format_chooser_output_formats, $k;

     // Check whether download file extension matches
    if(!in_array(strtoupper($ext),$format_chooser_output_formats))
        {return false;}

    $url_qs = [
        'ref' => $ref,
        'size' => $size,
        'k' => $k,
        'ext' => $ext,
        'page' => $page,
        'alt' => $alternative,
        'usage' => $usage,
        'usagecomment' => $usagecomment,
    ];
    $resource_data = get_resource_data($ref);

    // Check whether original resource file extension matches    
    $original_ext = $resource_data['file_extension'] ?? '';
    if(!in_array(strtoupper($original_ext),$format_chooser_input_formats))
        {return false;}
    
    $profile = getval('profile' , null);
    if (!empty($profile)) {
        $url_qs['profile'] = $profile;
    } else {
        $path = get_resource_path($ref, true, $size, false, $ext, -1, $page, $size=="scr" && checkperm("w") && $alternative == -1, '', $alternative);
        // We can use the existing previews unless we need to preserve the colour profiles,
        // these are likely to have been removed from scr size and below.
        // Alternative files not being converted can also use the existing file
        if (
            file_exists($path) 
            && (
                !$imagemagick_preserve_profiles 
                || in_array($size, array("hpr", "lpr", ""))
                || $alternative !== -1
            )
        ) {
            return false;
        }
    }
    
    return generateURL($baseurl_short . 'plugins/format_chooser/pages/convert.php', $url_qs);
    }

// Following moved from collection_download to work for offline jobs

function HookFormat_chooserAllReplaceuseoriginal()
    {
    global $format_chooser_output_formats, $format_chooser_profiles, $lang, $use_zip_extension, $collection_download_tar, $collection_download_tar_option;

    $disabled = '';
    $submitted = getval('submitted', null);
    if (!empty($submitted) || $collection_download_tar_option) {
        $disabled = ' disabled="disabled "';
    }
    $context = getval("ajax", '') !== "" ? "Modal" : "CentralSpace";
    # Replace the existing ajax_download() with our own that disables our widgets, too
    if ($use_zip_extension) {
        ?><script>
            jQuery(document).ready(function() {
                jQuery('#tardownload').on('change', function(){
                    if (this.value == 'off') {
                        jQuery('#<?php echo escape($context); ?>_question_downloadformat').slideDown();
                        jQuery('#<?php echo escape($context); ?>_downloadformat').prop('disabled', false);
                        jQuery('#<?php echo escape($context); ?>_question_downloadprofile').slideDown();
                        jQuery('#<?php echo escape($context); ?>_downloadprofile').prop('disabled', false);
                    } else {
                        jQuery('#<?php echo escape($context); ?>_question_downloadformat').slideUp();
                        jQuery('#<?php echo escape($context); ?>_downloadformat').prop('disabled', 'disabled');
                        jQuery('#<?php echo escape($context); ?>_question_downloadprofile').slideUp();
                        jQuery('#<?php echo escape($context); ?>_downloadprofile').prop('disabled', 'disabled');
                    }
                });
            });
        </script><?php
    }

    ?><div class="Question" id="<?php echo escape($context); ?>_question_downloadformat">
    <input type=hidden name="useoriginal" value="yes" />
    <label for="<?php echo escape($context); ?>_downloadformat"><?php echo escape($lang["downloadformat"]); ?></label>
    <select name="ext" class="stdwidth" id="<?php echo escape($context); ?>_downloadformat" <?php echo $disabled ?>>
        <option value="" selected="selected"><?php echo escape($lang['format_chooser_keep_format']); ?></option>
    <?php
    foreach ($format_chooser_output_formats as $format)
        {
        ?><option value="<?php echo $format ?>"><?php echo str_replace_formatted_placeholder("%extension", $format, $lang["field-fileextension"]) ?></option><?php
        }
    ?></select>
    <div class="clearerleft"> </div></div><?php
    if (!empty($format_chooser_profiles))
        {
        ?>
        <div class="Question" id="<?php echo escape($context); ?>_question_downloadprofile">
        <label for="profile"><?php echo escape($lang['format_chooser_choose_profile']); ?></label>
        <?php showProfileChooser('stdwidth', $disabled, $context) ?>
        <div class="clearerleft"> </div></div><?php
        }
    return true;
    }

function HookFormat_chooserAllSize_is_available($resource, $path, $size)
    {
    if (!supportsInputFormat($resource['file_extension']))
        {
        # Let the caller decide whether the file is available
        return false;
        }

    $sizes = get_all_image_sizes();

    # Filter out the largest one
    $maxSize = null;
    $maxWidth = 0;
    for ($n = 0; $n < count($sizes); $n++)
        {
        if ($maxWidth < (int)$sizes[$n]['width'])
            {
            $maxWidth = (int)$sizes[$n]['width'];
            $maxSize = $sizes[$n]['id'];
            }
        }
    return $size!=$maxSize;
    }

function HookFormat_chooserAllReplacedownloadextension($resource, $extension)
    {
    global $format_chooser_output_formats, $job_ext, $offline_job_in_progress;

    $inputFormat = $resource['file_extension'];
    if (
        !supportsInputFormat($inputFormat) 
        || (!isset($job_ext) && $offline_job_in_progress)
        ) {
        # Download the original file for this resource
        return $inputFormat;
    }
        
    $reqext = (isset($job_ext) && $job_ext != "") ? $job_ext : getval("ext",getDefaultOutputFormat($inputFormat)); 
    $ext = strtoupper($reqext);
    if (empty($ext) || !in_array($ext, $format_chooser_output_formats))
        {
        return false;
        }

    return strtolower($ext);
    }

function HookFormat_chooserAllReplacedownloadfile($resource, $size, $ext,
        $fileExists)
    {

    $original_resource_path = get_resource_path($resource['ref'], true, '', false, $resource['file_extension'], -1, 1, false, '', -1);

    if (!supportsInputFormat($resource['file_extension']) || !file_exists($original_resource_path))
        {
        # Do not replace files we do not support and skip files that do not have an original file
        return false;
        }

    $profile = getProfileFileName(getval('profile', null));
    if ($profile === null && $fileExists)
        {
        # Just serve the original file
        return false;
        }

    $baseDirectory = get_temp_dir() . '/format_chooser';
    
    if (!file_exists($baseDirectory))
        {
        mkdir($baseDirectory);
        }

    $target = $baseDirectory . '/' . get_download_filename($resource['ref'],$size,-1,$ext);
    $format = getImageFormat($size);
    $width = (int)$format['width'];
    $height = (int)$format['height'];

    set_time_limit(0);
    convertImage($resource, 1, -1, $target, $width, $height, $profile);
    if (!file_exists($target)) {
        return false;
    }
    return $target;
    }

function HookFormat_chooserAllCollection_download_modify_job($job_data=array())
{
    $profile = getval("profile","");
    $ext = getval("ext","");
    if (trim($profile) !== "" || trim($ext) !== "") {
        // Add requested extension to offline job data
        $job_data["ext"] = $ext;
        $job_data["profile"] = $profile;
        return $job_data;
    }

    return false;
}