mirror of
https://github.com/naturalcrit/homebrewery.git
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415 lines
12 KiB
JavaScript
415 lines
12 KiB
JavaScript
/* eslint-disable max-lines */
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const _ = require('lodash');
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const Marked = require('marked');
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const MarkedExtendedTables = require('marked-extended-tables');
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const renderer = new Marked.Renderer();
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//Processes the markdown within an HTML block if it's just a class-wrapper
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renderer.html = function (html) {
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if(_.startsWith(_.trim(html), '<div') && _.endsWith(_.trim(html), '</div>')){
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const openTag = html.substring(0, html.indexOf('>')+1);
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html = html.substring(html.indexOf('>')+1);
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html = html.substring(0, html.lastIndexOf('</div>'));
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return `${openTag} ${Marked.parse(html)} </div>`;
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}
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return html;
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};
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// Don't wrap {{ Divs or {{ empty Spans in <p> tags
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renderer.paragraph = function(text){
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let match;
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if(text.startsWith('<div') || text.startsWith('</div'))
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return `${text}`;
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else if(match = text.match(/(^|^.*?\n)<span class="inline-block(.*?<\/span>)$/)) {
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return `${match[1].trim() ? `<p>${match[1]}</p>` : ''}<span class="inline-block${match[2]}`;
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} else
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return `<p>${text}</p>\n`;
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};
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const mustacheSpans = {
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name : 'mustacheSpans',
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level : 'inline', // Is this a block-level or inline-level tokenizer?
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start(src) { return src.match(/{{[^{]/)?.index; }, // Hint to Marked.js to stop and check for a match
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tokenizer(src, tokens) {
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const completeSpan = /^{{[^\n]*}}/; // Regex for the complete token
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const inlineRegex = /{{(?::(?:"[\w,\-()#%. ]*"|[\w\,\-()#%.]*)|[^"'{}\s])*\s*|}}/g;
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const match = completeSpan.exec(src);
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if(match) {
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//Find closing delimiter
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let blockCount = 0;
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let tags = '';
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let endTags = 0;
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let endToken = 0;
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let delim;
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while (delim = inlineRegex.exec(match[0])) {
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if(!tags) {
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tags = ` ${processStyleTags(delim[0].substring(2))}`;
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endTags = delim[0].length;
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}
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if(delim[0].startsWith('{{')) {
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blockCount++;
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} else if(delim[0] == '}}' && blockCount !== 0) {
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blockCount--;
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if(blockCount == 0) {
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endToken = inlineRegex.lastIndex;
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break;
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}
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}
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}
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if(endToken) {
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const raw = src.slice(0, endToken);
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const text = raw.slice(endTags || -2, -2);
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return { // Token to generate
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type : 'mustacheSpans', // Should match "name" above
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raw : raw, // Text to consume from the source
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text : text, // Additional custom properties
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tags : tags,
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tokens : this.lexer.inlineTokens(text) // inlineTokens to process **bold**, *italics*, etc.
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};
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}
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}
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},
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renderer(token) {
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return `<span class="inline-block${token.tags}>${this.parser.parseInline(token.tokens)}</span>`; // parseInline to turn child tokens into HTML
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}
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};
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const mustacheDivs = {
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name : 'mustacheDivs',
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level : 'block',
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start(src) { return src.match(/\n *{{[^{]/m)?.index; }, // Hint to Marked.js to stop and check for a match
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tokenizer(src, tokens) {
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const completeBlock = /^ *{{[^\n}]* *\n.*\n *}}/s; // Regex for the complete token
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const blockRegex = /^ *{{(?::(?:"[\w,\-()#%. ]*"|[\w\,\-()#%.]*)|[^"'{}\s])* *$|^ *}}$/gm;
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const match = completeBlock.exec(src);
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if(match) {
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//Find closing delimiter
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let blockCount = 0;
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let tags = '';
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let endTags = 0;
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let endToken = 0;
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let delim;
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while (delim = blockRegex.exec(match[0])?.[0].trim()) {
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if(!tags) {
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tags = ` ${processStyleTags(delim.substring(2))}`;
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endTags = delim.length;
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}
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if(delim.startsWith('{{')) {
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blockCount++;
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} else if(delim == '}}' && blockCount !== 0) {
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blockCount--;
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if(blockCount == 0) {
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endToken = blockRegex.lastIndex;
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break;
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}
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}
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}
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if(endToken) {
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const raw = src.slice(0, endToken);
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const text = raw.slice(endTags || -2, -2);
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return { // Token to generate
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type : 'mustacheDivs', // Should match "name" above
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raw : raw, // Text to consume from the source
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text : text, // Additional custom properties
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tags : tags,
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tokens : this.lexer.blockTokens(text)
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};
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}
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}
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},
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renderer(token) {
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return `<div class="block${token.tags}>${this.parser.parse(token.tokens)}</div>`; // parseInline to turn child tokens into HTML
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}
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};
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const mustacheInjectInline = {
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name : 'mustacheInjectInline',
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level : 'inline',
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start(src) { return src.match(/ *{[^{\n]/)?.index; }, // Hint to Marked.js to stop and check for a match
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tokenizer(src, tokens) {
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const inlineRegex = /^ *{((?::(?:"[\w,\-()#%. ]*"|[\w\,\-()#%.]*)|[^"'{}\s])*)}/g;
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const match = inlineRegex.exec(src);
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if(match) {
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const lastToken = tokens[tokens.length - 1];
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if(!lastToken)
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return false;
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const tags = ` ${processStyleTags(match[1])}`;
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lastToken.originalType = lastToken.type;
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lastToken.type = 'mustacheInjectInline';
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lastToken.tags = tags;
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return {
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type : 'text', // Should match "name" above
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raw : match[0], // Text to consume from the source
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text : ''
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};
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}
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},
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renderer(token) {
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token.type = token.originalType;
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const text = this.parser.parseInline([token]);
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const openingTag = /(<[^\s<>]+)([^\n<>]*>.*)/s.exec(text);
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if(openingTag) {
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return `${openingTag[1]} class="${token.tags}${openingTag[2]}`;
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}
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return text;
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}
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};
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const mustacheInjectBlock = {
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extensions : [{
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name : 'mustacheInjectBlock',
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level : 'block',
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start(src) { return src.match(/\n *{[^{\n]/m)?.index; }, // Hint to Marked.js to stop and check for a match
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tokenizer(src, tokens) {
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const inlineRegex = /^ *{((?::(?:"[\w,\-()#%. ]*"|[\w\,\-()#%.]*)|[^"'{}\s])*)}/ym;
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const match = inlineRegex.exec(src);
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if(match) {
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const lastToken = tokens[tokens.length - 1];
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if(!lastToken)
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return false;
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lastToken.originalType = 'mustacheInjectBlock';
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lastToken.tags = ` ${processStyleTags(match[1])}`;
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return {
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type : 'mustacheInjectBlock', // Should match "name" above
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raw : match[0], // Text to consume from the source
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text : ''
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};
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}
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},
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renderer(token) {
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if(!token.originalType){
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return;
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}
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token.type = token.originalType;
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const text = this.parser.parse([token]);
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const openingTag = /(<[^\s<>]+)([^\n<>]*>.*)/s.exec(text);
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if(openingTag) {
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return `${openingTag[1]} class="${token.tags}${openingTag[2]}`;
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}
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return text;
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}
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}],
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walkTokens(token) {
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// After token tree is finished, tag tokens to apply styles to so Renderer can find them
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// Does not work with tables since Marked.js tables generate invalid "tokens", and changing "type" ruins Marked handling that edge-case
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if(token.originalType == 'mustacheInjectBlock' && token.type !== 'table') {
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token.originalType = token.type;
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token.type = 'mustacheInjectBlock';
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}
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}
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};
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const definitionLists = {
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name : 'definitionLists',
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level : 'block',
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start(src) { return src.match(/^.*?::.*/m)?.index; }, // Hint to Marked.js to stop and check for a match
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tokenizer(src, tokens) {
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const regex = /^([^\n]*?)::([^\n]*)(?:\n|$)/ym;
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let match;
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let endIndex = 0;
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const definitions = [];
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while (match = regex.exec(src)) {
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definitions.push({
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dt : this.lexer.inlineTokens(match[1].trim()),
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dd : this.lexer.inlineTokens(match[2].trim())
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});
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endIndex = regex.lastIndex;
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}
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if(definitions.length) {
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return {
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type : 'definitionLists',
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raw : src.slice(0, endIndex),
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definitions
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};
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}
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},
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renderer(token) {
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return `<dl>${token.definitions.reduce((html, def)=>{
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return `${html}<dt>${this.parser.parseInline(def.dt)}</dt>`
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+ `<dd>${this.parser.parseInline(def.dd)}</dd>\n`;
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}, '')}</dl>`;
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}
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};
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Marked.use({ extensions: [mustacheSpans, mustacheDivs, mustacheInjectInline, definitionLists] });
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Marked.use(MarkedExtendedTables());
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Marked.use(mustacheInjectBlock);
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Marked.use({ smartypants: true });
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//Fix local links in the Preview iFrame to link inside the frame
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renderer.link = function (href, title, text) {
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let self = false;
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if(href[0] == '#') {
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self = true;
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}
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href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
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if(href === null) {
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return text;
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}
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let out = `<a href="${escape(href)}"`;
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if(title) {
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out += ` title="${title}"`;
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}
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if(self) {
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out += ' target="_self"';
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}
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out += `>${text}</a>`;
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return out;
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};
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const nonWordAndColonTest = /[^\w:]/g;
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const cleanUrl = function (sanitize, base, href) {
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if(sanitize) {
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let prot;
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try {
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prot = decodeURIComponent(unescape(href))
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.replace(nonWordAndColonTest, '')
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.toLowerCase();
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} catch (e) {
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return null;
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}
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if(prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
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return null;
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}
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}
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try {
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href = encodeURI(href).replace(/%25/g, '%');
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} catch (e) {
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return null;
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}
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return href;
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};
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const escapeTest = /[&<>"']/;
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const escapeReplace = /[&<>"']/g;
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const escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
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const escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
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const escapeReplacements = {
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'&' : '&',
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'<' : '<',
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'>' : '>',
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'"' : '"',
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'\'' : '''
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};
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const getEscapeReplacement = (ch)=>escapeReplacements[ch];
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const escape = function (html, encode) {
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if(encode) {
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if(escapeTest.test(html)) {
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return html.replace(escapeReplace, getEscapeReplacement);
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}
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} else {
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if(escapeTestNoEncode.test(html)) {
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return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
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}
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}
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return html;
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};
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const sanatizeScriptTags = (content)=>{
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return content
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.replace(/<script/ig, '<script')
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.replace(/<\/script>/ig, '</script>');
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};
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const tagTypes = ['div', 'span', 'a'];
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const tagRegex = new RegExp(`(${
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_.map(tagTypes, (type)=>{
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return `\\<${type}\\b|\\</${type}>`;
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}).join('|')})`, 'g');
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// Special "void" tags that can be self-closed but don't need to be.
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const voidTags = new Set([
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'area', 'base', 'br', 'col', 'command', 'hr', 'img',
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'input', 'keygen', 'link', 'meta', 'param', 'source'
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]);
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const processStyleTags = (string)=>{
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//split tags up. quotes can only occur right after colons.
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//TODO: can we simplify to just split on commas?
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const tags = string.match(/(?:[^, ":]+|:(?:"[^"]*"|))+/g);
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if(!tags) return '"';
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const id = _.remove(tags, (tag)=>tag.startsWith('#')).map((tag)=>tag.slice(1))[0];
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const classes = _.remove(tags, (tag)=>!tag.includes(':'));
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const styles = tags.map((tag)=>tag.replace(/:"?([^"]*)"?/g, ':$1;'));
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return `${classes.join(' ')}" ${id ? `id="${id}"` : ''} ${styles.length ? `style="${styles.join(' ')}"` : ''}`;
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};
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module.exports = {
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marked : Marked,
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render : (rawBrewText)=>{
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rawBrewText = rawBrewText.replace(/^\\column$/gm, `\n<div class='columnSplit'></div>\n`)
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.replace(/^(:+)$/gm, (match)=>`${`<div class='blank'></div>`.repeat(match.length)}\n`);
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return Marked.parse(
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sanatizeScriptTags(rawBrewText),
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{ renderer: renderer }
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);
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},
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validate : (rawBrewText)=>{
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const errors = [];
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const leftovers = _.reduce(rawBrewText.split('\n'), (acc, line, _lineNumber)=>{
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const lineNumber = _lineNumber + 1;
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const matches = line.match(tagRegex);
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if(!matches || !matches.length) return acc;
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_.each(matches, (match)=>{
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_.each(tagTypes, (type)=>{
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if(match == `<${type}`){
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acc.push({
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type : type,
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line : lineNumber
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});
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}
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if(match === `</${type}>`){
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// Closing tag: Check we expect it to be closed.
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// The accumulator may contain a sequence of voidable opening tags,
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// over which we skip before checking validity of the close.
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while (acc.length && voidTags.has(_.last(acc).type) && _.last(acc).type != type) {
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acc.pop();
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}
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// Now check that what remains in the accumulator is valid.
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if(!acc.length){
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errors.push({
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line : lineNumber,
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type : type,
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text : 'Unmatched closing tag',
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id : 'CLOSE'
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});
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} else if(_.last(acc).type == type){
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acc.pop();
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} else {
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errors.push({
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line : `${_.last(acc).line} to ${lineNumber}`,
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type : type,
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text : 'Type mismatch on closing tag',
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id : 'MISMATCH'
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});
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acc.pop();
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}
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}
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});
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});
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return acc;
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}, []);
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_.each(leftovers, (unmatched)=>{
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errors.push({
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line : unmatched.line,
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type : unmatched.type,
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text : 'Unmatched opening tag',
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id : 'OPEN'
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});
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});
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return errors;
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},
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};
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