share functionality WIP

src/share/routes.js

@@ -1,6 +1,8 @@
 const shaca = require("./shaca/shaca");
 const shacaLoader = require("./shaca/shaca_loader");
 const shareRoot = require("./share_root");
+const utils = require("../services/utils");
+const {JSDOM} = require("jsdom");
 
 function getSubRoot(note) {
     if (note.noteId === shareRoot.SHARE_ROOT_NOTE_ID) {
@@ -16,6 +18,69 @@ function getSubRoot(note) {
     return getSubRoot(parentNote);
 }
 
+const NO_CONTENT = '<p>This note has no content.</p>';
+
+function getChildrenList(note) {
+    if (note.hasChildren()) {
+        const document = new JSDOM().window.document;
+
+        const ulEl = document.createElement("ul");
+
+        for (const childNote of note.getChildNotes()) {
+            const li = document.createElement("li");
+            const link = document.createElement("a");
+            link.appendChild(document.createTextNode(childNote.title));
+            link.setAttribute("href", childNote.noteId);
+
+            li.appendChild(link);
+            ulEl.appendChild(li);
+        }
+
+        return '<p>Child notes:</p>' + ulEl.outerHTML;
+    }
+    else {
+        return '';
+    }
+}
+
+function getContent(note) {
+    let content = note.getContent();
+
+    if (note.type === 'text') {
+        const isEmpty = !content?.trim() || (function() {
+            const document = new JSDOM(content).window.document;
+
+            return document.body.textContent.trim().length === 0
+                && document.querySelectorAll("img").length === 0;
+        })();
+
+        if (isEmpty) {
+            content = NO_CONTENT + getChildrenList(note);
+        }
+    }
+    else if (note.type === 'code') {
+        if (!content?.trim()) {
+            content = NO_CONTENT + getChildrenList(note);
+        }
+        else {
+            const document = new JSDOM().window.document;
+
+            const preEl = document.createElement('pre');
+            preEl.innerText = content;
+
+            content = preEl.outerHTML;
+        }
+    }
+    else if (note.type === 'book') {
+        content = getChildrenList(note);
+    }
+    else {
+        content = '<p>This note type cannot be displayed.</p>' + getChildrenList(note);
+    }
+
+    return content;
+}
+
 function register(router) {
     router.get('/share/:noteId', (req, res, next) => {
         const {noteId} = req.params;
@@ -25,10 +90,13 @@ function register(router) {
         if (noteId in shaca.notes) {
             const note = shaca.notes[noteId];
 
+            const content = getContent(note);
+
             const subRoot = getSubRoot(note);
 
             res.render("share", {
                 note,
+                content,
                 subRoot
             });
         }