Initial commit: PodcastYes — AI podcast platform

lib/ai/providers/openai-art.ts

@@ -0,0 +1,36 @@
+import { openai, ART_MODEL } from "../openai";
+import type { ArtProvider } from "../types";
+
+export class OpenAIArtProvider implements ArtProvider {
+  readonly model = ART_MODEL;
+
+  async generateCover(
+    prompt: string,
+    opts?: { size?: "1024x1024" }
+  ): Promise<{ data: Buffer; revisedPrompt?: string }> {
+    const res = await openai().images.generate({
+      model: this.model,
+      prompt,
+      n: 1,
+      size: opts?.size ?? "1024x1024",
+      response_format: "b64_json",
+    });
+    const item = res.data?.[0];
+    if (!item?.b64_json) throw new Error("DALL·E returned no image data");
+    return {
+      data: Buffer.from(item.b64_json, "base64"),
+      revisedPrompt: item.revised_prompt,
+    };
+  }
+}
+
+/** Build a cover-art prompt for an episode topic. */
+export function buildCoverPrompt(topic: string, tone: string, title?: string): string {
+  return [
+    `Podcast cover art for an episode titled "${title ?? topic}".`,
+    `Topic: ${topic}. Mood/tone: ${tone}.`,
+    "Modern, bold, eye-catching square album-cover style.",
+    "Strong focal subject, clean composition, vibrant but tasteful colors.",
+    "No text, no words, no letters, no logos.",
+  ].join(" ");
+}