<?php

/**
 * (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
 *
 * All Rights Reserved. See copyright.txt for details and a complete list of authors.
 * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
 * $Id$
 *
 * In Tiki 12.0 beta and before, the feature feature_use_fgal_for_wiki_attachments would add an empty gallery
 * for every single wiki page (on page load, even by anon i think).
 * This gets rid of all the empty ones...
 *
 * Usage:
 *
 *     php doc/devtools/remove_empty_wiki_attachment_filegals.php
 *
 */

if (isset($_SERVER['REQUEST_METHOD'])) {
    die;
}

require_once('tiki-setup.php');

function removeEmptyAttachmentGals()
{
    $galleryTable = TikiDb::get()->table('tiki_file_galleries');
    $fileTable = TikiDb::get()->table('tiki_files');
    $galleriesToDelete = [];

    $attachmentGalleries = $galleryTable->fetchAll(
        ['galleryId', 'name'],
        ['type' => 'attachments']
    );

    foreach ($attachmentGalleries as $gal) {
        $files = $fileTable->fetchCount(['galleryId' => $gal['galleryId']]);
        if (! $files) {
            $galleriesToDelete[] = $gal;
            echo "Attachment gallery: #{$gal['galleryId']} \"{$gal['name']}\" is empty, and will be removed\n";
            ob_flush();
        }
    }
    if ($galleriesToDelete) {
        $prompt = 'Are you sure you want to permanently remove all these (' . count($galleriesToDelete) . ') galleries? There is no undo... (y/n): ';
        if (readSTDIN($prompt, ['y', 'n']) == 'y') {
            echo "\n\n\nDeleting...\n\n";
            foreach ($galleriesToDelete as $gal) {
                TikiLib::lib('filegal')->remove_file_gallery($gal['galleryId']);
                echo "Removed gallery: #{$gal['galleryId']} \"{$gal['name']}\"\n";
                ob_flush();
            }
        }
    } else {
        echo "No empty attachement galleries found\n";
        ob_flush();
    }
    $remaining = count($attachmentGalleries) - count($galleriesToDelete);
    echo "There are $remaining attachment galleries left that contain files.\n";
    ob_flush();
}

function readSTDIN($prompt, $valid_inputs, $default = '')
{
    while (! isset($input) || (is_array($valid_inputs) && ! in_array($input, $valid_inputs)) || ($valid_inputs == 'is_file' && ! is_file($input))) {
        echo $prompt;
        ob_flush();
        $input = strtolower(trim(fgets(STDIN)));
        if (empty($input) && ! empty($default)) {
            $input = $default;
        }
    }
    return $input;
}

removeEmptyAttachmentGals();