45 lines
1.5 KiB
JavaScript
45 lines
1.5 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.permuteDomain = permuteDomain;
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const getPublicSuffix_1 = require("./getPublicSuffix");
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/**
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* Generates the permutation of all possible values that {@link domainMatch} the given `domain` parameter. The
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* array is in shortest-to-longest order. Useful when building custom {@link Store} implementations.
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*
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* @example
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* ```
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* permuteDomain('foo.bar.example.com')
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* // ['example.com', 'bar.example.com', 'foo.bar.example.com']
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* ```
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*
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* @public
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* @param domain - the domain to generate permutations for
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* @param allowSpecialUseDomain - flag to control if {@link https://www.rfc-editor.org/rfc/rfc6761.html | Special Use Domains} such as `localhost` should be allowed
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*/
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function permuteDomain(domain, allowSpecialUseDomain) {
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const pubSuf = (0, getPublicSuffix_1.getPublicSuffix)(domain, {
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allowSpecialUseDomain: allowSpecialUseDomain,
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});
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if (!pubSuf) {
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return undefined;
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}
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if (pubSuf == domain) {
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return [domain];
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}
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// Nuke trailing dot
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if (domain.slice(-1) == '.') {
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domain = domain.slice(0, -1);
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}
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const prefix = domain.slice(0, -(pubSuf.length + 1)); // ".example.com"
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const parts = prefix.split('.').reverse();
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let cur = pubSuf;
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const permutations = [cur];
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while (parts.length) {
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// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
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const part = parts.shift();
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cur = `${part}.${cur}`;
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permutations.push(cur);
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}
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return permutations;
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}
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