feat(export/markdown): add support for todos

Author: eliandoran

docs/Release Notes/Release Notes/v0.93.0.md

@@ -37,6 +37,7 @@
 *   Basic Touch Bar support for macOS.
 *   [Support Bearer Token](https://github.com/TriliumNext/Notes/issues/1701)
 *   The tab bar is now scrollable when there are many tabs by @SiriusXT
+*   Markdown export: support todo lists
 
 ## 🌍 Internationalization
 

src/services/export/markdown.spec.ts

@@ -321,4 +321,25 @@ describe("Markdown export", () => {
         expect(markdownExportService.toMarkdown(html)).toBe(expected);
     });
 
+    it("exports todo lists properly", () => {
+        const html = trimIndentation/*html*/`\
+            <ul class="todo-list">
+                <li>
+                    <label class="todo-list__label">
+                        <input type="checkbox" checked="checked" disabled="disabled"><span class="todo-list__label__description">Hello</span>
+                    </label>
+                </li>
+                <li>
+                    <label class="todo-list__label">
+                        <input type="checkbox" disabled="disabled"><span class="todo-list__label__description">World</span>
+                    </label>
+                </li>
+            </ul>
+        `;
+        const expected = trimIndentation`\
+            - [x] Hello
+            - [ ] World`;
+        expect(markdownExportService.toMarkdown(html)).toBe(expected);
+    });
+
 });

src/services/export/markdown.ts

@@ -230,7 +230,11 @@ function buildListItemFilter(): Rule {
                 var start = parent.getAttribute('start')
                 var index = Array.prototype.indexOf.call(parent.children, node)
                 prefix = (start ? Number(start) + index : index + 1) + '.  '
+            } else if (parent.classList.contains("todo-list")) {
+                const isChecked = node.querySelector("input[type=checkbox]:checked");
+                prefix = (isChecked ? "- [x] " : "- [ ] ");
             }
+
             const result = prefix + content + (node.nextSibling && !/\n$/.test(content) ? '\n' : '');
             return result;
         }