'use strict';
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var htmlparser = require('htmlparser2');
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var isObject = require('isobject');
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/**
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* @see https://github.com/fb55/htmlparser2/wiki/Parser-options
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*/
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var defaultOptions = {lowerCaseTags: false, lowerCaseAttributeNames: false};
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/**
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* Parse html to PostHTMLTree
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* @param {String} html
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* @param {Object} [options=defaultOptions]
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* @return {PostHTMLTree}
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*/
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function postHTMLParser(html, options) {
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var bufArray = [],
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results = [];
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bufArray.last = function() {
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return this[this.length - 1];
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};
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var parser = new htmlparser.Parser({
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onprocessinginstruction: function(name, data) {
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if (name.toLowerCase() === '!doctype') {
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results.push('<' + data + '>');
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}
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},
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oncomment: function(data) {
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var comment = '<!--' + data + '-->',
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last = bufArray.last();
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if (!last) {
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results.push(comment);
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return;
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}
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last.content || (last.content = []);
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last.content.push(comment);
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},
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onopentag: function(tag, attrs) {
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var buf = { tag: tag };
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if (Object.keys(attrs).length) {
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buf.attrs = attrs;
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}
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bufArray.push(buf);
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},
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onclosetag: function() {
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var buf = bufArray.pop();
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if (!bufArray.length) {
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results.push(buf);
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return;
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}
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var last = bufArray.last();
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if (!Array.isArray(last.content)) {
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last.content = [];
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}
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last.content.push(buf);
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},
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ontext: function(text) {
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var last = bufArray.last();
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if (!last) {
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results.push(text);
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return;
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}
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last.content || (last.content = []);
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last.content.push(text);
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}
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}, options || defaultOptions);
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parser.write(html);
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parser.end();
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return results;
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}
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function parserWrapper() {
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var option;
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function parser(html) {
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var opt = option || defaultOptions;
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return postHTMLParser(html, opt);
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}
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if (arguments.length === 1 && isObject(arguments[0])) {
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option = arguments[0];
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return parser;
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}
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option = arguments[1];
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return parser(arguments[0]);
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}
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module.exports = parserWrapper;
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module.exports.defaultOptions = defaultOptions;
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