Add content policy checks and rate limiting

lib/db-actions.ts

@@ -145,4 +145,8 @@ export async function getNextPageNumber(storyId: string): Promise<number> {
 
 export async function deletePage(pageId: string): Promise<void> {
   await db.delete(pages).where(eq(pages.id, pageId));
+}
+
+export async function deleteStory(storyId: string): Promise<void> {
+  await db.delete(stories).where(eq(stories.id, storyId));
 }

lib/utils.ts

@@ -7,3 +7,17 @@ export function cn(...inputs: ClassValue[]) {
 
 export const TOGETHER_LINK =
   "https://togetherai.link/?utm_source=make-comics&utm_medium=referral&utm_campaign=example-app";
+
+export function isContentPolicyViolation(errorMessage: string): boolean {
+  return (
+    errorMessage.includes("content policy") ||
+    errorMessage.includes("Invalid content detected") ||
+    errorMessage.includes("content moderation") ||
+    errorMessage.includes("flagged and rejected") ||
+    errorMessage.includes("NO_IMAGE")
+  );
+}
+
+export function getContentPolicyErrorMessage(): string {
+  return "Unable to generate image due to content policy. Please try a different prompt.";
+}