shelving/schema/FileSchema.js

Toolkit for using data in JavaScript.

import { ValueFeedback } from "../feedback/Feedback.js";
import { getFileExtension } from "../util/file.js";
import { isProp } from "../util/object.js";
import { OPTIONAL } from "./OptionalSchema.js";
import { StringSchema } from "./StringSchema.js";
/** Validate a file name matching one or more extensions. */
export class FileSchema extends StringSchema {
    types;
    constructor({ types, title = "File", ...options }) {
        super({ title, ...options });
        this.types = types;
    }
    validate(unsafeValue = this.value) {
        const path = super.validate(unsafeValue);
        const extension = getFileExtension(path);
        if (!extension)
            throw new ValueFeedback("Must be file name with extension", unsafeValue);
        if (this.types && !isProp(this.types, extension))
            throw new ValueFeedback("Invalid file type", extension);
        return path;
    }
}
/** Valid file, e.g. `file.txt` */
export const FILE = new FileSchema({});
/** Valid optional file, e.g. `file.txt`, or `null` */
export const OPTIONAL_FILE = OPTIONAL(FILE);