File size: 2,308 Bytes
71174bc | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | import { IFileParts } from "./FileUtils";
import memoize from "lodash.memoize";
const regexAcceptableChars = "\\w\\-.";
/**
* Make sure a filename is valid by removing non-alphanumeric characters.
*
* @param {string} filename The filename to check.
* @returns {string} The filename with all non-alphanumeric characters removed.
*/
export function fileNameFilter(filename: string): string {
// Keep numbers and letters and period. Also - and _.
// filename = filename.replace(/[^a-zA-Z\d.]/g, "");
const re = new RegExp(`[^${regexAcceptableChars}]`, "g");
filename = filename.replace(re, "");
// filename = filename.replace(/[^\w.-]/g, '');
return filename;
}
/**
* Make sure a given filename is acceptable and valid.
*
* @param {string} filename The filename to check.
* @returns {boolean} Whether the filename is acceptable.
*/
export function matchesFilename(filename: string): boolean {
// Create regex for any number of letters and numbers and period
// const r = /^[a-zA-Z\d.]+$/;
const r = new RegExp(`^[${regexAcceptableChars}]+$`, "g");
// Return bool whether text matches regex
return filename.match(r) !== null;
}
/**
* Get the basename and extension of a filename.
*
* @param {string} filename The filename to get the parts of.
* @returns {IFileParts} The basename and extension of the filename.
*/
export const getFileNameParts = memoize(function (
filename: string
): IFileParts {
// Handle dotfiles (e.g., .bashrc) where the dot is at the beginning
// and there are no other dots.
if (filename.startsWith('.') && filename.lastIndexOf('.') === 0) {
return {
basename: filename,
ext: "",
};
}
if (filename.indexOf(".") === -1) {
return {
basename: filename,
ext: "",
};
}
// Split filename into parts
const parts = filename.split(".");
// If subsequent parts are all small, treat them as extensions. So
// filename.pdb.txt, extension will be pdb.txt.
let ext = parts.pop();
while (parts.length > 1 && parts[parts.length - 1].length <= 3) {
ext = parts.pop() + "." + ext;
}
// Return parts
return {
basename: parts.join("."),
ext: ext,
} as IFileParts;
});
|