apache-file-server-visualizer/utils.js at master · AlissonSteffens/apache-file-server-visualizer · GitHub

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window.ApacheVisualizer = window.ApacheVisualizer || {};

(function(AV) {
    AV.getExtension = function(link) {
        if (!link) return "";
        try {
            var absoluteUrl = link.startsWith('//') ? 'https:' + link : link;
            var urlObj = new URL(absoluteUrl, 'http://dummy.com');
            var pathname = urlObj.pathname;
            var lastDot = pathname.lastIndexOf('.');
            if (lastDot === -1) return "";
            return pathname.substring(lastDot + 1).toLowerCase();
        } catch (e) {
            var pathname = link.split('?')[0].split('#')[0];
            var lastDot = pathname.lastIndexOf('.');
            if (lastDot === -1) return "";
            return pathname.substring(lastDot + 1).toLowerCase();
        }
    };

    AV.isImage = function(link) {
        var ext = AV.getExtension(link);
        return ['png', 'jpg', 'jpeg', 'gif', 'bmp', 'svg', 'webp'].includes(ext);
    };

    AV.isVideo = function(link) {
        var ext = AV.getExtension(link);
        return ['mp4', 'webm', 'ogg', 'ogv', 'mov', 'm4v'].includes(ext);
    };

    AV.isAudio = function(link) {
        var ext = AV.getExtension(link);
        return ['mp3', 'wav', 'ogg', 'oga', 'aac', 'flac', 'm4a'].includes(ext);
    };

    AV.isDocument = function(link) {
        var ext = AV.getExtension(link);
        return ['html', 'htm', 'txt', 'pdf'].includes(ext);
    };

    AV.findThumbnailForLink = function(link, rootEl) {
        var root = rootEl || document;

        // 4chan specific optimization
        if (window.location.hostname.includes('4chan.org') || window.location.hostname.includes('4channel.org')) {
            var match = link.match(/\/(\d+)\.[a-z0-9]+$/i);
            if (match) {
                var fileId = match[1];
                var img = root.querySelector('img[src*="' + fileId + 's."]');
                if (img) {
                    var src = img.getAttribute('src');
                    if (src) {
                        if (src.startsWith('//')) src = 'https:' + src;
                        return src;
                    }
                }
            }
        }

        var selector = 'a[href="' + link + '"]';
        if (link.startsWith('https:')) {
            selector += ', a[href="' + link.substring(6) + '"]';
        }
        try {
            var anchor = root.querySelector(selector);
            if (anchor) {
                var img = anchor.querySelector('img');
                if (img) {
                    var src = img.getAttribute('src');
                    if (src) {
                        if (src.startsWith('//')) src = 'https:' + src;
                        if (!src.includes('/icons/') && !src.includes('default')) {
                            return src;
                        }
                    }
                }
            }
        } catch (e) {}
        return '';
    };

    AV.isFolder = function(link) {
        if (!link) return false;
        if (window.location.hostname.includes('4chan.org') || window.location.hostname.includes('4channel.org')) {
            return false;
        }
        if (link.startsWith('mailto:') || link.startsWith('javascript:') || link.startsWith('#')) {
            return false;
        }
        if (AV.isImage(link) || AV.isVideo(link) || AV.isAudio(link) || AV.isDocument(link)) {
            return false;
        }
        if (link.startsWith('http://') || link.startsWith('https://') || link.startsWith('//')) {
            try {
                var urlObj = new URL(link.startsWith('//') ? 'https:' + link : link);
                if (urlObj.hostname !== window.location.hostname) {
                    return false;
                }
            } catch (e) {
                return false;
            }
        }
        if (link.endsWith('/') || link.includes('?dir=')) {
            return true;
        }
        if (link === '..' || link === '../') {
            return true;
        }
        return false;
    };
})(window.ApacheVisualizer);