From bfff71c2b871e37afdd6a5e47ee8340411b48ea6 Mon Sep 17 00:00:00 2001
From: Dirk Rudolph <drudolph@adobe.com>
Date: Wed, 21 Feb 2024 13:16:04 +0100
Subject: [PATCH] feat: implement missing event handling for seamless authoring
 experience (#3)

* feat: support instant reloading of default content
* fix: reload for sections
* fix: merge richtexts
* fix: listen for content-update
* fix: do not listen for content-update
* feat: handle content-update the same way as patch
* feat: handle section and main updates
* feat: handle move
* fix: block reload with auto blocks
---
 scripts/editor-support.js | 115 +++++++++++++++++++++++++++++---------
 1 file changed, 89 insertions(+), 26 deletions(-)

diff --git a/scripts/editor-support.js b/scripts/editor-support.js
index 359b20d65e..2e5fc7cf7c 100644
--- a/scripts/editor-support.js
+++ b/scripts/editor-support.js
@@ -1,42 +1,105 @@
 import {
   decorateBlock,
+  decorateBlocks,
   decorateButtons,
   decorateIcons,
+  decorateSections,
   loadBlock,
+  loadBlocks,
 } from './aem.js';
+// eslint-disable-next-line import/no-unresolved
+import { decorateRichtext } from './editor-support-rte.js';
+import { decorateMain } from './scripts.js';
 
-const connectionPrefix = 'urn:aemconnection:';
-
-async function handleEditorUpdate(event) {
+async function applyChanges(event) {
+  // redecorate default content and blocks on patches (in the properties rail)
   const { detail } = event;
 
-  const resource = detail?.request?.target?.resource;
-  if (!resource) return;
+  const resource = detail?.request?.target?.resource // update, patch components
+    || detail?.request?.target?.container?.resource // update, patch, add to sections
+    || detail?.request?.to?.container?.resource; // move in sections
+  if (!resource) return false;
+  const updates = detail?.response?.updates;
+  if (!updates.length) return false;
+  const { content } = updates[0];
+  if (!content) return false;
 
+  const parsedUpdate = new DOMParser().parseFromString(content, 'text/html');
   const element = document.querySelector(`[data-aue-resource="${resource}"]`);
-  const block = element?.parentElement?.closest('.block') || element?.closest('.block');
-  const blockResource = block?.getAttribute('data-aue-resource');
-  if (!block || !blockResource?.startsWith(connectionPrefix)) return;
 
-  const updates = detail?.response?.updates;
-  if (updates.length > 0) {
-    const { content } = updates[0];
-    const newBlockDocument = new DOMParser().parseFromString(content, 'text/html');
-    const newBlock = newBlockDocument?.querySelector(`[data-aue-resource="${blockResource}"]`);
-    if (newBlock) {
-      newBlock.style.display = 'none';
-      block.insertAdjacentElement('afterend', newBlock);
-      // decorate buttons and icons
-      decorateButtons(newBlock);
-      decorateIcons(newBlock);
-      // decorate and load the block
-      decorateBlock(newBlock);
-      await loadBlock(newBlock);
-      // remove the old block and show the new one
-      block.remove();
-      newBlock.style.display = null;
+  if (element) {
+    if (element.matches('main')) {
+      const newMain = parsedUpdate.querySelector(`[data-aue-resource="${resource}"]`);
+      newMain.style.display = 'none';
+      element.insertAdjacentElement('afterend', newMain);
+      decorateMain(newMain);
+      decorateRichtext(newMain);
+      await loadBlocks(newMain);
+      element.remove();
+      newMain.style.display = null;
+      // eslint-disable-next-line no-use-before-define
+      attachEventListners(newMain);
+      return true;
+    }
+
+    const block = element.parentElement?.closest('.block[data-aue-resource]') || element?.closest('.block[data-aue-resource]');
+    if (block) {
+      const blockResource = block.getAttribute('data-aue-resource');
+      const newBlock = parsedUpdate.querySelector(`[data-aue-resource="${blockResource}"]`);
+      if (newBlock) {
+        newBlock.style.display = 'none';
+        block.insertAdjacentElement('afterend', newBlock);
+        decorateButtons(newBlock);
+        decorateIcons(newBlock);
+        decorateBlock(newBlock);
+        await loadBlock(newBlock);
+        block.remove();
+        newBlock.style.display = null;
+        return true;
+      }
+    } else {
+      // sections and default content, may be multiple in the case of richtext
+      const newElements = parsedUpdate.querySelectorAll(`[data-aue-resource="${resource}"],[data-richtext-resource="${resource}"]`);
+      if (newElements.length) {
+        const { parentElement } = element;
+        if (element.matches('.section')) {
+          const [newSection] = newElements;
+          newSection.style.display = 'none';
+          element.insertAdjacentElement('afterend', newSection);
+          decorateButtons(newSection);
+          decorateIcons(newSection);
+          decorateRichtext(newSection);
+          decorateSections(parentElement);
+          decorateBlocks(parentElement);
+          await loadBlocks(newSection);
+          element.remove();
+          newSection.style.display = null;
+        } else {
+          element.replaceWith(...newElements);
+          decorateButtons(parentElement);
+          decorateIcons(parentElement);
+          decorateRichtext(parentElement);
+        }
+        return true;
+      }
     }
   }
+
+  return false;
+}
+
+function attachEventListners(main) {
+  [
+    'aue:content-patch',
+    'aue:content-update',
+    'aue:content-add',
+    'aue:content-move',
+    'aue:content-remove',
+  ].forEach((eventType) => main?.addEventListener(eventType, async (event) => {
+    event.stopPropagation();
+    const applied = await applyChanges(event);
+    if (!applied) window.location.reload();
+  }));
 }
 
-document.querySelector('main')?.addEventListener('aue:content-patch', handleEditorUpdate);
+attachEventListners(document.querySelector('main'));