Add local AI vition option for alt text

src/actions/artworks/generateAltText.ts

@@ -0,0 +1,86 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { getImageBufferFromS3Key } from "@/utils/getImageBufferFromS3";
+
+export async function generateAltTextForArtwork(
+  artworkId: string,
+  prompt?: string,
+) {
+  const serviceUrl = process.env.ALT_TEXT_SERVICE_URL;
+  if (!serviceUrl) {
+    throw new Error("ALT_TEXT_SERVICE_URL is not set");
+  }
+
+  const artwork = await prisma.artwork.findUnique({
+    where: { id: artworkId },
+    select: {
+      variants: {
+        where: { type: "original" },
+        select: { s3Key: true },
+        take: 1,
+      },
+    },
+  });
+
+  const original = artwork?.variants?.[0];
+  if (!original?.s3Key) {
+    throw new Error("Original image variant not found");
+  }
+
+  const buffer = await getImageBufferFromS3Key(original.s3Key);
+
+  const formData = new FormData();
+  const bytes = new Uint8Array(buffer);
+  formData.append(
+    "image",
+    new Blob([bytes], { type: "image/jpeg" }),
+    "artwork.jpg",
+  );
+  if (prompt && prompt.trim().length > 0) {
+    formData.append("prompt", prompt.trim());
+  }
+
+  const controller = new AbortController();
+  const timeoutId = setTimeout(() => controller.abort(), 120000);
+
+  let response: Response | null = null;
+  let lastError: unknown = null;
+
+  for (let attempt = 0; attempt < 2; attempt += 1) {
+    try {
+      response = await fetch(`${serviceUrl}/caption`, {
+        method: "POST",
+        body: formData,
+        signal: controller.signal,
+      });
+      break;
+    } catch (err) {
+      lastError = err;
+      if (attempt === 0) {
+        await new Promise((resolve) => setTimeout(resolve, 750));
+      }
+    }
+  }
+
+  clearTimeout(timeoutId);
+
+  if (!response) {
+    throw new Error(`Alt text service failed: ${String(lastError)}`);
+  }
+
+  if (!response.ok) {
+    const text = await response.text();
+    throw new Error(`Alt text service failed: ${text}`);
+  }
+
+  const data = (await response.json()) as { altText?: string; error?: string };
+  if (data.error) {
+    throw new Error(`Alt text service error: ${data.error}`);
+  }
+  if (!data.altText) {
+    throw new Error(`Alt text service returned no result: ${JSON.stringify(data)}`);
+  }
+
+  return data.altText.trim();
+}

src/components/artworks/single/EditArtworkForm.tsx

@@ -1,32 +1,50 @@
-"use client"
+"use client";
 
+import { generateAltTextForArtwork } from "@/actions/artworks/generateAltText";
 import { updateArtwork } from "@/actions/artworks/updateArtwork";
 import { Button } from "@/components/ui/button";
 import { Calendar } from "@/components/ui/calendar";
-import { Form, FormControl, FormDescription, FormField, FormItem, FormLabel, FormMessage } from "@/components/ui/form";
+import {
+  Form,
+  FormControl,
+  FormDescription,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from "@/components/ui/form";
 import { Input } from "@/components/ui/input";
 import MultipleSelector from "@/components/ui/multiselect";
-import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover";
+import {
+  Popover,
+  PopoverContent,
+  PopoverTrigger,
+} from "@/components/ui/popover";
 import { Switch } from "@/components/ui/switch";
 import { Textarea } from "@/components/ui/textarea";
-import { ArtTag } from "@/generated/prisma/client";
+import type { ArtTag } from "@/generated/prisma/client";
 import { cn } from "@/lib/utils";
 import { artworkSchema } from "@/schemas/artworks/imageSchema";
-import { ArtworkWithRelations, CategoryWithTags } from "@/types/Artwork";
+import type { ArtworkWithRelations, CategoryWithTags } from "@/types/Artwork";
 import { zodResolver } from "@hookform/resolvers/zod";
 import { format } from "date-fns";
 import { useRouter } from "next/navigation";
+import { useTransition } from "react";
 import { useForm } from "react-hook-form";
 import { toast } from "sonner";
-import { z } from "zod/v4";
+import type { z } from "zod/v4";
 
-export default function EditArtworkForm({ artwork, categories, tags }:
-  {
-    artwork: ArtworkWithRelations,
-    categories: CategoryWithTags[]
-    tags: ArtTag[]
-  }) {
+export default function EditArtworkForm({
+  artwork,
+  categories,
+  tags,
+}: {
+  artwork: ArtworkWithRelations;
+  categories: CategoryWithTags[];
+  tags: ArtTag[];
+}) {
   const router = useRouter();
+  const [isGeneratingAlt, startAltTransition] = useTransition();
   const form = useForm<z.infer<typeof artworkSchema>>({
     resolver: zodResolver(artworkSchema),
     defaultValues: {
@@ -41,19 +59,21 @@ export default function EditArtworkForm({ artwork, categories, tags }:
       notes: artwork.notes || "",
       month: artwork.month || undefined,
       year: artwork.year || undefined,
-      creationDate: artwork.creationDate ? new Date(artwork.creationDate) : undefined,
-      categoryIds: artwork.categories?.map(cat => cat.id) ?? [],
-      tagIds: artwork.tags?.map(tag => tag.id) ?? [],
+      creationDate: artwork.creationDate
+        ? new Date(artwork.creationDate)
+        : undefined,
+      categoryIds: artwork.categories?.map((cat) => cat.id) ?? [],
+      tagIds: artwork.tags?.map((tag) => tag.id) ?? [],
       newCategoryNames: [],
-      newTagNames: []
-    }
-  })
+      newTagNames: [],
+    },
+  });
 
   async function onSubmit(values: z.infer<typeof artworkSchema>) {
-    const updatedArtwork = await updateArtwork(values, artwork.id)
+    const updatedArtwork = await updateArtwork(values, artwork.id);
     if (updatedArtwork) {
-      toast.success("Artwork updated")
-      router.push(`/artworks`)
+      toast.success("Artwork updated");
+      router.push(`/artworks`);
     }
   }
 
@@ -80,10 +100,42 @@ export default function EditArtworkForm({ artwork, categories, tags }:
             name="altText"
             render={({ field }) => (
               <FormItem>
+                <div className="flex items-center justify-between gap-3">
                   <FormLabel>Alt Text</FormLabel>
+                  <Button
+                    type="button"
+                    variant="outline"
+                    size="sm"
+                    disabled={isGeneratingAlt}
+                    onClick={() =>
+                      startAltTransition(async () => {
+                        try {
+                          const alt = await generateAltTextForArtwork(
+                            artwork.id,
+                            field.value,
+                          );
+                          form.setValue("altText", alt, {
+                            shouldDirty: true,
+                            shouldValidate: true,
+                          });
+                          toast.success("Alt text generated");
+                        } catch (err) {
+                          console.error(err);
+                          toast.error("Alt text generation failed");
+                        }
+                      })
+                    }
+                  >
+                    {isGeneratingAlt ? "Generating..." : "Generate"}
+                  </Button>
+                </div>
                 <FormControl>
                   <Input {...field} placeholder="Alt for this image" />
                 </FormControl>
+                <FormDescription>
+                  Generates a caption from the original image. CPU-only can take
+                  10–30s.
+                </FormDescription>
                 <FormMessage />
               </FormItem>
             )}
@@ -95,7 +147,10 @@ export default function EditArtworkForm({ artwork, categories, tags }:
               <FormItem>
                 <FormLabel>Description</FormLabel>
                 <FormControl>
-                  <Textarea {...field} placeholder="A descriptive text to the image" />
+                  <Textarea
+                    {...field}
+                    placeholder="A descriptive text to the image"
+                  />
                 </FormControl>
                 <FormMessage />
               </FormItem>
@@ -125,9 +180,11 @@ export default function EditArtworkForm({ artwork, categories, tags }:
                   <Input
                     {...field}
                     type="number"
-                    value={field.value ?? ''}
+                    value={field.value ?? ""}
                     onChange={(e) =>
-                      field.onChange(e.target.value === '' ? undefined : +e.target.value)
+                      field.onChange(
+                        e.target.value === "" ? undefined : +e.target.value,
+                      )
                     }
                   />
                 </FormControl>
@@ -145,9 +202,11 @@ export default function EditArtworkForm({ artwork, categories, tags }:
                   <Input
                     {...field}
                     type="number"
-                    value={field.value ?? ''}
+                    value={field.value ?? ""}
                     onChange={(e) =>
-                      field.onChange(e.target.value === '' ? undefined : +e.target.value)
+                      field.onChange(
+                        e.target.value === "" ? undefined : +e.target.value,
+                      )
                     }
                   />
                 </FormControl>
@@ -170,10 +229,12 @@ export default function EditArtworkForm({ artwork, categories, tags }:
                           variant="outline"
                           className={cn(
                             "pl-3 text-left font-normal",
-                            !field.value && "text-muted-foreground"
+                            !field.value && "text-muted-foreground",
                           )}
                         >
-                          {field.value ? format(field.value, "PPP") : "Pick a date"}
+                          {field.value
+                            ? format(field.value, "PPP")
+                            : "Pick a date"}
                         </Button>
                       </FormControl>
                     </PopoverTrigger>
@@ -182,7 +243,7 @@ export default function EditArtworkForm({ artwork, categories, tags }:
                         mode="single"
                         selected={field.value}
                         onSelect={(date) => {
-                          field.onChange(date)
+                          field.onChange(date);
                         }}
                         initialFocus
                         fromYear={1990}
@@ -236,17 +297,23 @@ export default function EditArtworkForm({ artwork, categories, tags }:
                       onChange={(options) => {
                         const values = options.map((o) => o.value);
 
-                        const existingIds = values.filter((v) => !v.startsWith("__new__:"));
+                        const existingIds = values.filter(
+                          (v) => !v.startsWith("__new__:"),
+                        );
                         const newNames = values
                           .filter((v) => v.startsWith("__new__:"))
                           .map((v) => v.replace("__new__:", "").trim())
                           .filter(Boolean);
 
                         field.onChange(existingIds);
-                        form.setValue("newCategoryNames", Array.from(new Set(newNames)), {
+                        form.setValue(
+                          "newCategoryNames",
+                          Array.from(new Set(newNames)),
+                          {
                             shouldDirty: true,
                             shouldValidate: true,
-                        });
+                          },
+                        );
                       }}
                     />
                   </FormControl>
@@ -276,7 +343,8 @@ export default function EditArtworkForm({ artwork, categories, tags }:
                 .map((t) => {
                   let group = "Other tags";
                   if (selectedTagIds.includes(t.id)) group = "Selected";
-                  else if (preferredTagIds.has(t.id)) group = "From selected categories";
+                  else if (preferredTagIds.has(t.id))
+                    group = "From selected categories";
 
                   return { label: t.name, value: t.id, group };
                 })
@@ -301,12 +369,19 @@ export default function EditArtworkForm({ artwork, categories, tags }:
                     <MultipleSelector
                       options={tagOptions}
                       groupBy="group"
-                      groupOrder={["Selected", "From selected categories", "Other tags"]}
+                      groupOrder={[
+                        "Selected",
+                        "From selected categories",
+                        "Other tags",
+                      ]}
                       showSelectedInDropdown
                       placeholder="Select or type to create tags"
                       hidePlaceholderWhenSelected
                       selectFirstItem
-                      value={[...selectedExistingOptions, ...selectedNewOptions]}
+                      value={[
+                        ...selectedExistingOptions,
+                        ...selectedNewOptions,
+                      ]}
                       creatable
                       createOption={(raw) => ({
                         value: `__new__:${raw}`,
@@ -316,17 +391,23 @@ export default function EditArtworkForm({ artwork, categories, tags }:
                       onChange={(options) => {
                         const values = options.map((o) => o.value);
 
-                        const existingIds = values.filter((v) => !v.startsWith("__new__:"));
+                        const existingIds = values.filter(
+                          (v) => !v.startsWith("__new__:"),
+                        );
                         const newNames = values
                           .filter((v) => v.startsWith("__new__:"))
                           .map((v) => v.replace("__new__:", "").trim())
                           .filter(Boolean);
 
                         field.onChange(existingIds);
-                        form.setValue("newTagNames", Array.from(new Set(newNames)), {
+                        form.setValue(
+                          "newTagNames",
+                          Array.from(new Set(newNames)),
+                          {
                             shouldDirty: true,
                             shouldValidate: true,
-                        });
+                          },
+                        );
                       }}
                     />
                   </FormControl>
@@ -347,7 +428,10 @@ export default function EditArtworkForm({ artwork, categories, tags }:
                   <FormDescription></FormDescription>
                 </div>
                 <FormControl>
-                  <Switch checked={field.value} onCheckedChange={field.onChange} />
+                  <Switch
+                    checked={field.value}
+                    onCheckedChange={field.onChange}
+                  />
                 </FormControl>
               </FormItem>
             )}
@@ -359,10 +443,15 @@ export default function EditArtworkForm({ artwork, categories, tags }:
               <FormItem className="flex items-center justify-between rounded-lg border p-4">
                 <div className="space-y-0.5">
                   <FormLabel>NSFW</FormLabel>
-                  <FormDescription>This image contains sensitive or adult content.</FormDescription>
+                  <FormDescription>
+                    This image contains sensitive or adult content.
+                  </FormDescription>
                 </div>
                 <FormControl>
-                  <Switch checked={field.value} onCheckedChange={field.onChange} />
+                  <Switch
+                    checked={field.value}
+                    onCheckedChange={field.onChange}
+                  />
                 </FormControl>
               </FormItem>
             )}
@@ -374,10 +463,15 @@ export default function EditArtworkForm({ artwork, categories, tags }:
               <FormItem className="flex items-center justify-between rounded-lg border p-4">
                 <div className="space-y-0.5">
                   <FormLabel>Publish</FormLabel>
-                  <FormDescription>Will this image be published.</FormDescription>
+                  <FormDescription>
+                    Will this image be published.
+                  </FormDescription>
                 </div>
                 <FormControl>
-                  <Switch checked={field.value} onCheckedChange={field.onChange} />
+                  <Switch
+                    checked={field.value}
+                    onCheckedChange={field.onChange}
+                  />
                 </FormControl>
               </FormItem>
             )}
@@ -389,10 +483,15 @@ export default function EditArtworkForm({ artwork, categories, tags }:
               <FormItem className="flex items-center justify-between rounded-lg border p-4">
                 <div className="space-y-0.5">
                   <FormLabel>Set as header image</FormLabel>
-                  <FormDescription>Will be the main banner image. Choose a fitting one.</FormDescription>
+                  <FormDescription>
+                    Will be the main banner image. Choose a fitting one.
+                  </FormDescription>
                 </div>
                 <FormControl>
-                  <Switch checked={field.value} onCheckedChange={field.onChange} />
+                  <Switch
+                    checked={field.value}
+                    onCheckedChange={field.onChange}
+                  />
                 </FormControl>
               </FormItem>
             )}
@@ -444,10 +543,16 @@ export default function EditArtworkForm({ artwork, categories, tags }:
           /> */}
           <div className="flex flex-col gap-4">
             <Button type="submit">Submit</Button>
-            <Button type="reset" variant="secondary" onClick={() => router.back()}>Cancel</Button>
+            <Button
+              type="reset"
+              variant="secondary"
+              onClick={() => router.back()}
+            >
+              Cancel
+            </Button>
           </div>
         </form>
       </Form>
-    </div >
+    </div>
   );
 }