Write out a root.json file w/ the last overall refresh date (useful for threads with no comments to still show the "Last Refreshed")

src/threads/refresh.ts

@@ -1,6 +1,6 @@
 import {getMailboxesToSearch, MailboxIterable} from "../mail/read.ts";
 import {withClient} from "../mail/client.ts";
-import type {Message, ThreadData} from "../types.ts";
+import type {Message, RootData, ThreadData} from "../types.ts";
 import {AsyncCollection} from "../bones/collection/AsyncCollection.ts";
 import {sha256} from "../bones/crypto.ts";
 import {config} from "../config.ts";
@@ -68,5 +68,16 @@ export async function refreshThreadsEntirely(): Promise<void> {
                 (_, v) => typeof v === 'bigint' ? `${v}` : v)
             await Bun.write(`${config.dirs.data}/threads/${threadId}.json`, json)
         }
+
+        const root: RootData = {
+            refresh: {
+                date: now,
+            },
+        }
+
+        await Bun.write(
+            `${config.dirs.data}/root.json`,
+            JSON.stringify(root),
+        )
     })
 }

src/types.ts

@@ -66,3 +66,9 @@ export type ThreadData = {
     },
     comments: ThreadComment[],
 }
+
+export type RootData = {
+    refresh?: {
+        date: Date,
+    },
+}