feat: fallback to unsplash cover when article contains no image

lib/openai.ts

@@ -195,6 +195,23 @@ respond with a plain unordered list each item starting with the year the movie w
   return recommendations;
 };
 
+export async function createUnsplashSearchTerm(content: string) {
+  if (!openAI) return;
+  const chatCompletion = await openAI.chat.completions.create({
+    model: model,
+    messages: [
+      {
+        role: "system",
+        content:
+          "Please respond with a search term for unsplash for the following article",
+      },
+      { role: "user", content: content.slice(0, 10_000) },
+    ],
+  });
+
+  return chatCompletion.choices[0].message.content?.toLowerCase();
+}
+
 export async function createTags(content: string) {
   if (!openAI) return;
   const chatCompletion = await openAI.chat.completions.create({