| 1 | "use server"; |
| 2 | |
| 3 | import { utapi } from "@/app/api/uploadthing/core"; |
| 4 | import { env } from "@/env"; |
| 5 | import { requireOptionalIntegration } from "@/lib/env/optional-integrations"; |
| 6 | import { auth } from "@/server/auth"; |
| 7 | import { db } from "@/server/db"; |
| 8 | import { fal } from "@fal-ai/client"; |
| 9 | import { UTFile } from "uploadthing/server"; |
| 10 | |
| 11 | // Nano Banana Pro model for presentation slide images |
| 12 | // const SLIDE_IMAGE_MODEL = "fal-ai/nano-banana-pro"; |
| 13 | const DEFAULT_SLIDE_IMAGE_MODEL = "fal-ai/flux-2/flash"; |
| 14 | |
| 15 | export async function generateSlideImageAction( |
| 16 | prompt: string, |
| 17 | imageModel: string = DEFAULT_SLIDE_IMAGE_MODEL, |
| 18 | ) { |
| 19 | const session = await auth(); |
| 20 | |
| 21 | if (!session?.user?.id) { |
| 22 | return { |
| 23 | success: false, |
| 24 | error: "You must be logged in to generate images", |
| 25 | }; |
| 26 | } |
| 27 | |
| 28 | // Admin only feature |
| 29 | if (!session.user.isAdmin) { |
| 30 | return { |
| 31 | success: false, |
| 32 | error: "This feature is only available for admin users", |
| 33 | }; |
| 34 | } |
| 35 | |
| 36 | try { |
| 37 | const falConfig = requireOptionalIntegration({ |
| 38 | integration: "FAL", |
| 39 | envVar: "FAL_API_KEY", |
| 40 | value: env.FAL_API_KEY, |
| 41 | feature: "slide image generation", |
| 42 | }); |
| 43 | |
| 44 | if (!falConfig.ok) { |
| 45 | return { |
| 46 | success: false, |
| 47 | error: falConfig.error, |
| 48 | }; |
| 49 | } |
| 50 | |
| 51 | fal.config({ |
| 52 | credentials: falConfig.value, |
| 53 | }); |
| 54 | |
| 55 | console.log(`Generating slide image with model: ${imageModel}`); |
| 56 | |
| 57 | const result = await fal.subscribe(imageModel, { |
| 58 | input: { |
| 59 | prompt: prompt, |
| 60 | num_images: 1, |
| 61 | aspect_ratio: "16:9", |
| 62 | }, |
| 63 | }); |
| 64 | |
| 65 | const imageUrl = result.data?.images?.[0]?.url; |
| 66 | |
| 67 | if (!imageUrl) { |
| 68 | console.log("Failed to generate slide image", result); |
| 69 | throw new Error("Failed to generate slide image"); |
| 70 | } |
| 71 | |
| 72 | console.log(`Generated slide image URL: ${imageUrl}`); |
| 73 | |
| 74 | // Download the image from fal.ai URL |
| 75 | const imageResponse = await fetch(imageUrl); |
| 76 | if (!imageResponse.ok) { |
| 77 | throw new Error("Failed to download image from fal.ai"); |
| 78 | } |
| 79 | |
| 80 | const imageBlob = await imageResponse.blob(); |
| 81 | const imageBuffer = await imageBlob.arrayBuffer(); |
| 82 | |
| 83 | // Generate a filename |
| 84 | const filename = `slide_${Date.now()}.png`; |
| 85 | |
| 86 | // Create a UTFile from the downloaded image |
| 87 | const utFile = new UTFile([new Uint8Array(imageBuffer)], filename); |
| 88 | |
| 89 | // Upload to UploadThing |
| 90 | const uploadResult = await utapi.uploadFiles([utFile]); |
| 91 | |
| 92 | if (!uploadResult[0]?.data?.ufsUrl) { |
| 93 | console.error("Upload error:", uploadResult[0]?.error); |
| 94 | throw new Error("Failed to upload image to UploadThing"); |
| 95 | } |
| 96 | |
| 97 | const permanentUrl = uploadResult[0].data.ufsUrl; |
| 98 | console.log(`Uploaded slide image to: ${permanentUrl}`); |
| 99 | |
| 100 | // Store in database |
| 101 | const generatedImage = await db.generatedImage.create({ |
| 102 | data: { |
| 103 | url: permanentUrl, |
| 104 | prompt: prompt, |
| 105 | userId: session.user.id, |
| 106 | }, |
| 107 | }); |
| 108 | |
| 109 | return { |
| 110 | success: true, |
| 111 | image: generatedImage, |
| 112 | }; |
| 113 | } catch (error) { |
| 114 | console.error("Error generating slide image:", error); |
| 115 | return { |
| 116 | success: false, |
| 117 | error: |
| 118 | error instanceof Error |
| 119 | ? error.message |
| 120 | : "Failed to generate slide image", |
| 121 | }; |
| 122 | } |
| 123 | } |
| 124 |