feat: first shot of supporting gist (#76)

close #72

src/routes/index.ts

@@ -92,3 +92,11 @@ router.get(/\/emoticon\/(.*)/, (req, res, next) => {
   const uri = `/${encodeURI(req.params[0])}?${querystring.stringify(req.query)}`;
   return confluency.newRequest('get', uri, true).pipe(res);
 });
+
+router.get('/gist/:userId/:gistId', (req, res, next) => {
+  res.render('md', { url: `https://gist.githubusercontent.com/${req.params.userId}/${req.params.gistId}/raw` });
+});
+
+router.get('/gist/:userId/:gistId/:commitHash', (req, res, next) => {
+  res.render('md', { url: `https://gist.githubusercontent.com/${req.params.userId}/${req.params.gistId}/raw/${req.params.commitHash}` });
+});

views/md.pug

@@ -0,0 +1,84 @@
+doctype html
+html
+  head
+    title= title
+    link(rel='stylesheet', href=`/css/reveal.css`)
+    link(rel='stylesheet', href=`/css/theme/${theme || 'black'}.css`)#theme
+    link(rel='stylesheet', href=`/lib/css/zenburn.css`)
+    link(rel='stylesheet', href='https://cdn.rawgit.com/knsv/mermaid/7.0.0/dist/mermaid.css')
+    script(src='https://cdn.rawgit.com/knsv/mermaid/7.0.0/dist/mermaid.min.js')
+    script(src='https://cdn.rawgit.com/mathiasbynens/he/670991a4/he.js')
+    if printPdf
+      script.
+        var link = document.createElement( 'link' );
+        link.rel = 'stylesheet';
+        link.type = 'text/css';
+        link.href = window.location.search.match( /print-pdf/gi ) ? '/css/print/pdf.css' : '/css/print/paper.css';
+        document.getElementsByTagName( 'head' )[0].appendChild( link );
+
+  body
+    .reveal
+      .slides
+        section(data-markdown=url)
+
+    script(src=`/lib/js/head.min.js`)
+    script(src=`/js/reveal.js`)
+    script.
+      // https://github.com/hakimel/reveal.js#configuration
+      Reveal.initialize({
+        controls: true,
+        progress: true,
+        history: true,
+        center: true,
+
+        transition: '#{transition || "slide"}', // none/fade/slide/convex/concave/zoom
+
+        // Optional reveal.js plugins
+        dependencies: [
+         { src: `/plugin/markdown/marked.js`, async: true },
+         { src: `/plugin/markdown/markdown.js`, async: true },
+         { src: `/lib/js/classList.js`, condition: function() { return !document.body.classList; } },
+         { src: `/plugin/highlight/highlight.js`, async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
+         { src: `/plugin/zoom-js/zoom.js`, async: true },
+         { src: `/plugin/notes/notes.js`, async: true }
+        ]
+      });
+      var nextId = 0;
+      function onReadyToRenderMermaid(event) {
+        var mermaidContainer = event.currentSlide.getElementsByClassName('mermaid')[0];
+        if (!mermaidContainer) return;
+        if (mermaidContainer.getAttribute('data-processed')) return;
+        mermaidContainer.setAttribute('data-processed', true);
+        var text = he.decode(mermaidContainer.innerHTML).trim();
+
+        var chart = document.createElement('div');
+        mermaidContainer.appendChild(chart);
+        function insertSvg(svgCode, bindFunctions) {
+          chart.innerHTML = svgCode;
+          chart.firstChild.style.width = chart.getAttribute('viewbox').split(' ')[2] + 'px';
+          chart.firstChild.style.height = chart.getAttribute('viewbox').split(' ')[3] + 'px';
+          bindFunctions(chart);
+        }
+        if (!chart.id) {
+          chart.id = 'mermaidChart' + nextId++;
+          mermaidAPI.render(chart.id, text, insertSvg, mermaidContainer);
+        }
+        Reveal.layout();
+      }
+      Reveal.addEventListener('ready', onReadyToRenderMermaid);
+      Reveal.addEventListener('slidechanged', onReadyToRenderMermaid);
+      mermaid.initialize({startOnLoad: false});
+      document.addEventListener('keypress', function (event) {
+        if (typeof URL === 'undefined') return;
+        const url = new URL(document.location);
+        if (!url.searchParams) return;
+        if (event.keyCode === 116) {
+          const themes = [
+            'beige', 'black', 'blood', 'league', 'moon', 'night', 'serif', 'simple', 'sky', 'solarized', 'white'
+          ];
+          const prevTheme = url.searchParams.get('theme');
+          const prevIndex = themes.indexOf(prevTheme || 'black');
+          url.searchParams.set('theme', themes[(prevIndex + 1) % themes.length]);
+          document.location = url.href;
+        }
+      }, false);