@jackdbd/eleventy-plugin-permissions-policy/lib/utils.js

Eleventy plugin that writes Permissions-Policy and Feature-Policy headers to a `_headers` file when Eleventy builds your site.

import fs from 'node:fs';
import defDebug from 'debug';
import { DEBUG_PREFIX } from './constants.js';
const debug = defDebug(`${DEBUG_PREFIX}:utils`);
/**
 * Converts a Feature-Policy directive to a string.
 *
 * @param {Directive} d
 */
export const featurePolicyDirectiveMapper = (d) => {
    const allowlist = d.allowlist === undefined || d.allowlist.length === 0
        ? `'none'`
        : d.allowlist
            .map((s) => {
            return s === '*' ? s : `'${s}'`;
        })
            .join(' ');
    return `${d.feature} ${allowlist}`;
};
/**
 * Converts a Permissions-Policy directive to a string.
 *
 * @param {Directive} d
 */
export const permissionsPolicyDirectiveMapper = (d) => {
    const allowlist = d.allowlist === undefined || d.allowlist.length === 0
        ? ''
        : d.allowlist
            .map((s) => {
            return s.includes('http') ? `"${s}"` : s;
        })
            .join(' ');
    if (allowlist === '*') {
        return `${d.feature}=*`;
    }
    else {
        return `${d.feature}=(${allowlist})`;
    }
};
export const appendToHeadersFile = (headerKey, headerValue, headersFilepath, patterns) => {
    patterns.forEach((pattern) => {
        debug(`add ${headerKey} header for resources matching ${pattern}`);
        fs.appendFileSync(headersFilepath, `\n${pattern}\n  ${headerKey}: ${headerValue}\n`);
    });
};
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