feat: schedule next airing episode

happens when new title is saved, or when new episode internal route is run successfully

src/models/titleMessages.ts

@@ -0,0 +1,31 @@
+import { eq } from "drizzle-orm";
+
+import type { Env } from "~/types/env";
+
+import { getDb } from "./db";
+import { titleMessagesTable } from "./schema";
+
+export function setTitleMessage(env: Env, titleId: number, messageId: string) {
+  return getDb(env)
+    .insert(titleMessagesTable)
+    .values({ titleId, messageId })
+    .onConflictDoUpdate({
+      set: { messageId },
+      target: [titleMessagesTable.titleId],
+    });
+}
+
+export function getTitleMessage(env: Env, titleId: number) {
+  return getDb(env)
+    .select()
+    .from(titleMessagesTable)
+    .where(eq(titleMessagesTable.titleId, titleId))
+    .then((results) => results[0].messageId);
+}
+
+export function deleteTitleMessage(env: Env, titleId: number) {
+  return getDb(env)
+    .delete(titleMessagesTable)
+    .where(eq(titleMessagesTable.titleId, titleId))
+    .run();
+}