ENG-1189: init schema to check if page and top level blocks exist

apps/roam/src/data/blockPropsSettingsConfig.ts

@@ -1 +1,2 @@
-export const DG_BLOCK_PROP_SETTINGS_PAGE_TITLE ="roam/js/discourse-graph/block-prop-settings";
+export const DG_BLOCK_PROP_SETTINGS_PAGE_TITLE ="roam/js/discourse-graph/block-prop-settings";
+export const TOP_LEVEL_BLOCK_PROP_KEYS = { featureFlags: "Feature Flags" };

apps/roam/src/utils/initBlockPropSettings.ts

@@ -0,0 +1,47 @@
+import {
+  TOP_LEVEL_BLOCK_PROP_KEYS,
+  DG_BLOCK_PROP_SETTINGS_PAGE_TITLE,
+} from "~/data/blockPropsSettingsConfig";
+import getPageUidByPageTitle from "roamjs-components/queries/getPageUidByPageTitle";
+import getShallowTreeByParentUid from "roamjs-components/queries/getShallowTreeByParentUid";
+import { createPage, createBlock } from "roamjs-components/writes";
+
+const ensurePageExists = async (pageTitle: string): Promise<string> => {
+  let pageUid = getPageUidByPageTitle(pageTitle);
+
+  if (!pageUid) {
+    pageUid = window.roamAlphaAPI.util.generateUID();
+    await createPage({
+      title: pageTitle,
+      uid: pageUid,
+    });
+  }
+
+  return pageUid;
+};
+
+const ensureBlocksExist = async (pageUid: string): Promise<void> => {
+  const blockTexts = Object.values(TOP_LEVEL_BLOCK_PROP_KEYS);
+  const existingChildren = getShallowTreeByParentUid(pageUid);
+  const existingTexts = new Set(existingChildren.map((child) => child.text));
+
+  const missingBlocks = blockTexts.filter(
+    (blockText) => !existingTexts.has(blockText),
+  );
+
+  if (missingBlocks.length > 0) {
+    await Promise.all(
+      missingBlocks.map((blockText) =>
+        createBlock({
+          parentUid: pageUid,
+          node: { text: blockText },
+        }),
+      ),
+    );
+  }
+};
+
+export const initSchema = async () => {
+  const pageUid = await ensurePageExists(DG_BLOCK_PROP_SETTINGS_PAGE_TITLE);
+  await ensureBlocksExist(pageUid);
+};