@navikt/ds-react/esm/form/file-upload/utils/validate-files.js

React components from the Norwegian Labour and Welfare Administration.

import { fileRejectionReason, } from "../FileUpload.types.js";
import { isAcceptedFileType } from "./is-accepted-file-type.js";
import { isAcceptedSize } from "./is-accepted-size.js";
export const validateFiles = (files, accept, validator, maxSizeInBytes = -1) => {
    const allFiles = [];
    const accepted = [];
    const rejected = [];
    files.forEach((file) => {
        const acceptedFileType = isAcceptedFileType(file, accept);
        const acceptedFileSize = isAcceptedSize(file, maxSizeInBytes);
        const customValidation = validator ? validator(file) : true;
        const reasons = [];
        if (customValidation !== true) {
            reasons.push(customValidation);
        }
        if (!acceptedFileType) {
            reasons.push(fileRejectionReason.FileType);
        }
        if (!acceptedFileSize) {
            reasons.push(fileRejectionReason.FileSize);
        }
        allFiles.push({
            file,
            error: reasons.length > 0,
            reasons,
        });
        if (reasons.length === 0) {
            accepted.push(file);
            return;
        }
        rejected.push({
            file,
            reasons,
        });
    });
    return {
        files: allFiles,
        partitionedFiles: {
            accepted,
            rejected,
        },
    };
};
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