@lautarobock/file-input
Version:
Angular Material File Input
29 lines • 3.36 kB
JavaScript
/**
* Validator for size of file
* @param max Max of size of file (in bytes)
*/
export function MaxSizeValidator(max) {
return (ctrl) => {
max = Number(max);
if (isNaN(max)) {
throw 'MaxSizeValidator: max of size of file is invalid';
}
if (!ctrl.value)
return null;
let files = ctrl.value;
if (!Array.isArray(ctrl.value)) {
files = [ctrl.value];
}
if (!files.length)
return null;
const add = (a, b) => a + b;
const sumSize = files.map(x => x.size).reduce(add);
if (sumSize > max) {
return {
maxSize: true
};
}
return null;
};
}
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