mobilizon/js/src/utils/image.ts

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TypeScript
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2019-09-02 14:35:50 +02:00
import { IPicture } from '@/types/picture.model';
export async function buildFileFromIPicture(obj: IPicture | null) {
if (!obj) return 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) {
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);
});
}