Creating a decorator

export function TemplateAutocomplete(): ClassDecorator {
  return createClassDecorator((target: Command) =>
    createProxy(target, {
      apply(target) {
        target.autocompleteRun = async (
          interaction: AutocompleteInteraction,
        ) => {
          const template = interaction.options.getString("template");
          if (!template) return;
          const data = (
            await db.template.findMany({ select: { id: true } })
          ).map((x) => x.id);
          const fuse = new Fuse(data);
          console.log(
            (template ? fuse.search(template).map((x) => x.item) : data)
              .slice(0, 25)
              .map((x) => ({
                name: x,
                value: x,
              })),
          );
          return interaction
            .respond(
              (template ? fuse.search(template).map((x) => x.item) : data)
                .slice(0, 25)
                .map((x) => ({
                  name: x,
                  value: x,
                })),
            )
            .catch(() => {});
        };
      },
    }),
  );
}

@ApplyOptions<Command.Options>({
  description: "Create and generate a template",
})
@TemplateAutocomplete()
export class TemplateCommand extends Command {

.addStringOption((string) =>
  string
    .setName("template")
    .setDescription(
      "ID of the template to save as (defaults to share ID)",
    )
    .setRequired(true)
    .setAutocomplete(true),
),