mobilizon/js/src/utils/image.ts

import { IPicture } from "@/types/picture.model";

export async function buildFileFromIPicture(obj: IPicture | null | undefined): Promise<File | null> {
  if (!obj) return Promise.resolve(null);

  const response = await fetch(obj.url);
  const blob = await response.blob();

  return new File([blob], obj.name);
}

export function buildFileVariable<T>(file: File | null, name: string, alt?: string): Record<string, unknown> {
  if (!file) return {};

  return {
    [name]: {
      picture: {
        name: file.name,
        alt: alt || file.name,
        file,
      },
    },
  };
}

export function readFileAsync(file: File): Promise<string | ArrayBuffer | null> {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();

    reader.onload = () => {
      resolve(reader.result);
    };

    reader.onerror = reject;

    reader.readAsBinaryString(file);
  });
}