79 lines
1.4 KiB
JavaScript
79 lines
1.4 KiB
JavaScript
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"use strict";
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var punycode = require('punycode');
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var SuffixTrie = require('../suffix-trie.js');
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var PublicSuffixOrgParser = {};
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/**
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* Filters a commented or empty line
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*
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* @param {string} row
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* @return {string|null}
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*/
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function keepOnlyRules(row) {
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var trimmed = row.trim();
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if (trimmed.length === 0 || trimmed.indexOf('//') === 0) {
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return null;
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}
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// TODO - Ignore leading or trailing dot
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return trimmed;
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}
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/**
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* Returns a rule based on string analysis
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*
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* @param {string} row
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* @return {object} a public suffix rule
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*/
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function domainBuilder(row) {
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var rule = {
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exception: false,
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source: null,
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parts: null,
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};
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// Only read line up to the first white-space
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var spaceIndex = row.indexOf(' ');
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if (spaceIndex !== -1) {
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row = row.substr(0, spaceIndex);
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}
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row = punycode.toASCII(row);
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// Keep track of initial rule
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rule.source = row;
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// Exception
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if (row[0] === '!') {
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row = row.substr(1);
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rule.exception = true;
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}
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rule.parts = row.split('.').reverse();
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return rule;
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}
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/**
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* Parse a one-domain-per-line file
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*
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* @param body {String}
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* @return {Array}
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*/
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PublicSuffixOrgParser.parse = function (body) {
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return new SuffixTrie((body + '')
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.split('\n')
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.map(keepOnlyRules)
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.filter(function (r) { return r !== null; })
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.map(domainBuilder));
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};
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module.exports = PublicSuffixOrgParser;
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