Adds simple cover preview label if needs updating for excessive size or unsupported host
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// ==UserScript==
// @name RED Cover Inspector
// @namespace https://greasyfork.org/users/321857-anakunda
// @version 1.0
// @description Adds simple cover preview label if needs updating for excessive size or unsupported host
// @author Anakunda
// @copyright 2020, Anakunda (https://greasyfork.org/users/321857-anakunda)
// @license GPL-3.0-or-later
// @match https://redacted.ch/torrents.php?id=*
// @connect *
// @grant GM_xmlhttpRequest
// @grant GM_getValue
// @grant GM_setValue
// ==/UserScript==
function getRemoteFileSize(url) {
return new Promise(function(resolve, reject) {
var imageSize, abort = GM_xmlhttpRequest({
method: 'GET', url: url, responseType: 'arraybuffer',
onreadystatechange: function(response) {
if (imageSize || response.readyState < XMLHttpRequest.HEADERS_RECEIVED
|| !/^(?:Content-Length):\s*(\d+)\b/im.test(response.responseHeaders)) return;
if (!(imageSize = parseInt(RegExp.$1))) return;
resolve(imageSize);
abort.abort();
},
onload: function(response) { // fail-safe
if (imageSize) return;
if (response.status >= 200 && response.status < 400) resolve(response.responseText.length /*response.response.byteLength*/);
else reject('image not accessible');
},
onerror: response => { reject('image not accessible') },
ontimeout: response => { reject('image not accessible') },
});
});
}
function formattedSize(size) {
return size < 1024**1 ? Math.round(size) + ' B'
: size < 1024**2 ? (Math.round(size * 10 / 2**10) / 10) + ' KiB'
: size < 1024**3 ? (Math.round(size * 100 / 2**20) / 100) + ' MiB'
: size < 1024**4 ? (Math.round(size * 100 / 2**30) / 100) + ' GiB'
: size < 1024**5 ? (Math.round(size * 100 / 2**40) / 100) + ' TiB'
: (Math.round(size * 100 / 2**50) / 100) + ' PiB';
}
var acceptableCoverSize = GM_getValue('acceptable_cover_size');
if (!(acceptableCoverSize > 0)) GM_setValue('acceptable_cover_size', acceptableCoverSize = 2048);
document.querySelectorAll('div#covers p > img').forEach(function(img) {
getRemoteFileSize(img.src).catch(function(reason) {
console.warn('Failed to get remote image size (' + img.src + '):', reason);
return undefined;
}).then(function(size) {
const isProxied = img.src.startsWith('https://redacted.ch/image.php?'),
isPreferredHost = img.src.startsWith('https://ptpimg.me'),
isSizeOK = !(size > acceptableCoverSize * 2**10);
if (isPreferredHost && isSizeOK) return;
let div = document.createElement('div');
div.innerHTML = (isSizeOK ? '<span>' : '<span style="color: yellow;">') + formattedSize(size) +
'</span> / <span>' + img.naturalWidth + '×' + img.naturalHeight + '</span>';
if (isProxied) div.innerHTML = '<span style="color: yellow;">[PROXY]</span> / ' + div.innerHTML;
else if (!isPreferredHost) div.innerHTML = '<span style="color: yellow;">[EXTERNAL]</span> / ' + div.innerHTML;
div.style = 'color: white; border: 1px solid whitesmoke; background-color: #ae2300; ' +
'position: relative; bottom: 25px; right: 5px; font: 700 8pt "Segoe UI"; float: right; padding: 1px 5px;';
img.insertAdjacentElement('afterend', div);
});
});