--- /dev/null
+'use strict';
+
+/**
+ * A bunch of shorthand to put together common parts of an HTML page.
+ */
+
+/**
+ * Some fields may have values outside normal dates, handle them here.
+ * @param {Date} date
+ * @param {String} otherwise
+ */
+const dateOrNot = (date, otherwise) => {
+ if (!date) {
+ return otherwise;
+ }
+ if (typeof date === 'number') {
+ date = new Date(date);
+ }
+ const dateMs = date.getTime();
+ if (!Number.isFinite(dateMs)
+ || dateMs == 0) {
+ return otherwise;
+ }
+ return date.toString();
+};
+
+
+/**
+ * Render a duration.
+ * @param {Number} seconds
+ * @returns {String}
+ */
+ const secondsToPeriod = (seconds) => {
+ let value = seconds;
+ const result = [];
+
+ const nextResult = (factor, label) => {
+ const r = factor ? value % factor : value;
+ if (r) {
+ result.push(`${r} ${label}${r != 1 ? 's' : ''}`);
+ }
+ value = factor ? Math.floor(value / factor) : value;
+ }
+
+ nextResult(60, 'second');
+ nextResult(60, 'minute');
+ nextResult(24, 'hour');
+ nextResult(30, 'day');
+ nextResult(undefined, 'month');
+
+ result.reverse();
+ return result.join(' ');
+};
+
+
+/**
+ * Render a topic as a row of details.
+ * @param {Object} topic
+ * @param {Object[]} subscribers
+ * @param {Boolean} detailsLink
+ * @returns {String}
+ */
+function renderTopicRow(topic, subscribers, detailsLink = true) {
+ return `<tr>
+ <th scope="row">${detailsLink ? '<a href="topic/' + topic.id + '">' : ''}${topic.url}${detailsLink ? '</a>' : ''}</th>
+ <td>${subscribers.length}</td>
+ <td>${dateOrNot(topic.created, 'Unknown')}</td>
+ <td>${secondsToPeriod(topic.leaseSecondsPreferred)}</td>
+ <td>${secondsToPeriod(topic.leaseSecondsMin)}</td>
+ <td>${secondsToPeriod(topic.leaseSecondsMax)}</td>
+ <td>${topic.publisherValidationUrl ? topic.publisherValidationUrl : 'None'}</td>
+ <td>${topic.isActive}</td>
+ <td>${topic.isDeleted}</td>
+ <td>${dateOrNot(topic.lastPublish, 'Never')}</td>
+ <td>${dateOrNot(topic.contentFetchNextAttempt, 'Next Publish')}</td>
+ <td>${topic.contentFetchAttemptsSinceSuccess}</td>
+ <td>${dateOrNot(topic.contentUpdated, 'Never')}</td>
+ <td>${topic.contentType}</td>
+ <td>${topic.id}</td>
+</tr>`;
+}
+
+
+/**
+ * Render the header row for topic details.
+ * @returns {String}
+ */
+function renderTopicRowHeader() {
+ return `<tr>
+ <th scope="col">Topic URL</th>
+ <th scope="col">Subscribers</th>
+ <th scope="col">Created</th>
+ <th scope="col">Lease Time Preferred</th>
+ <th scope="col">Lease Time Minimum</th>
+ <th scope="col">Lease Time Maximum</th>
+ <th scope="col">Publisher Validation URL</th>
+ <th scope="col">Active</th>
+ <th scope="col">Deleted</th>
+ <th scope="col">Last Publish Notification</th>
+ <th scope="col">Next Content Fetch</th>
+ <th scope="col">Content Fetch Failures</th>
+ <th scope="col">Content Updated</th>
+ <th scope="col">Content Type</th>
+ <th scope="col">ID</th>
+</tr>`;
+}
+
+
+/**
+ * Render a subscription as a row of details.
+ * @param {Object} subscription
+ * @returns {String}
+ */
+function renderSubscriptionRow(subscription) {
+ return `<tr>
+ <td scope="row">${subscription.callback}</td>
+ <td>${dateOrNot(subscription.created, 'Unknown')}</td>
+ <td>${dateOrNot(subscription.verified, 'Never')}</td>
+ <td>${dateOrNot(subscription.expires, 'Never')}</td>
+ <td>${!!subscription.secret}</td>
+ <td>${subscription.signatureAlgorithm}</td>
+ <td>${subscription.httpRemoteAddr}</td>
+ <td>${subscription.httpFrom}</td>
+ <td>${dateOrNot(subscription.contentDelivered, 'Never')}</td>
+ <td>${subscription.deliveryAttemptsSinceSuccess}</td>
+ <td>${dateOrNot(subscription.deliveryNextAttempt, 'Next Publish')}</td>
+ <td>${subscription.id}</td>
+</tr>`;
+}
+
+
+/**
+ * Render a row of headers for subscription details.
+ * @returns {String}
+ */
+function renderSubscriptionRowHeader() {
+ return `<tr>
+ <th scope="col">Callback URL</th>
+ <th scope="col">Created</th>
+ <th scope="col">Verified</th>
+ <th scope="col">Expires</th>
+ <th scope="col">Using Secret</th>
+ <th scope="col">Signature Type</th>
+ <th scope="col">Remote Address</th>
+ <th scope="col">From</th>
+ <th scope="col">Content Delivered</th>
+ <th scope="col">Content Delivery Failures</th>
+ <th scope="col">Next Delivery</th>
+ <th scope="col">ID</th>
+</tr>
+`;
+}
+
+
+/**
+ * Render the preamble for an HTML page, up through body.
+ * @param {Number} pagePathLevel number of paths below root this page is
+ * @param {String} pageTitle
+ * @param {String[]} headElements
+ * @returns
+ */
+function htmlHead(pagePathLevel, pageTitle, headElements = []) {
+ const rootPathPfx = '../'.repeat(pagePathLevel);
+ return `<!DOCTYPE html>
+<html lang="en>
+ <head>
+ <meta charset="utf-8">` +
+ headElements.map((e) => `${' '.repeat(2)}${e}`).join('\n') + `
+ <title>${pageTitle}</title>
+ <link rel="stylesheet" href="${rootPathPfx}static/theme.css">
+ </head>
+ <body>`;
+}
+
+
+/**
+ * Closes remainder of HTML page body.
+ * @returns {String}
+ */
+function htmlTail() {
+ return ` </body>
+</html>`;
+}
+
+
+/**
+ * Render a navigation link for the header section.
+ * @param {Object} nav
+ * @param {String} nav.href
+ * @param {String} nav.class
+ * @param {String} nav.text
+ * @returns {String}
+ */
+function renderNavLink(nav) {
+ return `<li>
+ <a href="${nav.href}"${nav.class ? (' class="' + nav.class + '"') : ''}>${nav.text}</a>
+</li>`;
+}
+
+
+/**
+ * Render the navigation header, and open the main section.
+ * @param {String} pageTitle
+ * @param {Object[]} navLinks
+ * @returns {String}
+ */
+function htmlHeader(pageTitle, navLinks = []) {
+ return ` <header>
+ <h1>${pageTitle}</h1>
+ <nav>` +
+ (navLinks.length ? `
+ <ol>
+ ${navLinks.map((l) => renderNavLink(l)).join('\n')}
+ </ol>`
+ : '') + `
+ </nav>
+ </header>
+ <main>`;
+}
+
+
+/**
+ * Close the main section and finish off with boilerplate.
+ * @returns {String}
+ */
+function htmlFooter() {
+ return ` </main>
+ <footer>
+ <ol>
+ <a href="https://git.squeep.com/?p=websub-hub;a=tree">Development Repository</a>
+ </ol>
+ <ol>
+ <a href="https://squeep.com/">A Squeep Infrastructure Component</a>
+ </ol>
+ <ol>
+ ©<time datetime="2021">ⅯⅯⅩⅩⅠ</time>
+ </ol>
+ </footer>`;
+}
+
+
+/**
+ * Render all parts of an HTML page.
+ * @param {Number} pagePathLevel
+ * @param {String} pageTitle
+ * @param {String[]} headElements
+ * @param {Object[]} navLinks
+ * @param {String[]} main
+ * @returns {String}
+ */
+function htmlTemplate(pagePathLevel, pageTitle, headElements = [], navLinks = [], main = []) {
+ return [
+ htmlHead(pagePathLevel, pageTitle, headElements),
+ htmlHeader(pageTitle, navLinks),
+ ...main,
+ htmlFooter(),
+ htmlTail(),
+ ].join('\n');
+}
+
+
+module.exports = {
+ dateOrNot,
+ secondsToPeriod,
+ htmlHeader,
+ htmlFooter,
+ htmlHead,
+ htmlTail,
+ renderNavLink,
+ renderTopicRowHeader,
+ renderTopicRow,
+ renderSubscriptionRowHeader,
+ renderSubscriptionRow,
+ htmlTemplate,
+};
\ No newline at end of file
projects / websub-hub / blobdiff