basic implementation of "similar notes" widget

src/public/javascripts/widgets/similar_notes.js

@@ -0,0 +1,36 @@
+import StandardWidget from "./standard_widget.js";
+import linkService from "../services/link.js";
+import server from "../services/server.js";
+import treeCache from "../services/tree_cache.js";
+
+class SimilarNotesWidget extends StandardWidget {
+    getWidgetTitle() { return "Similar notes"; }
+
+    getMaxHeight() { return "200px"; }
+
+    async doRenderBody() {
+        const similarNoteIds = await server.get('similar_notes/' + this.ctx.note.noteId);
+
+        console.log(similarNoteIds);
+
+        if (similarNoteIds.length === 0) {
+            this.$body.text("No similar notes found ...");
+            return;
+        }
+
+        await treeCache.getNotes(similarNoteIds); // preload all at once
+
+        const $list = $("<ul>");
+
+        for (const similarNoteId of similarNoteIds) {
+            const $item = $("<li>")
+                .append(await linkService.createNoteLink(similarNoteId));
+
+            $list.append($item);
+        }
+
+        this.$body.empty().append($list);
+    }
+}
+
+export default SimilarNotesWidget;