Convert markdown to js

packages/rocketchat-markdown/markdown.js

@@ -0,0 +1,93 @@
+/*
+ * Markdown is a named function that will parse markdown syntax
+ * @param {Object} message - The message object
+ */
+
+class MarkdownClass {
+	parse(text) {
+		return this.parseNotEscaped(_.escapeHTML(text));
+	}
+
+	parseNotEscaped(msg) {
+		const schemes = RocketChat.settings.get('Markdown_SupportSchemesForLink').split(',').join('|');
+
+		// Support ![alt text](http://image url)
+		msg = msg.replace(new RegExp(`!\\[([^\\]]+)\\]\\(((?:${ schemes }):\\/\\/[^\\)]+)\\)`, 'gm'), function(match, title, url) {
+			const target = url.indexOf(Meteor.absoluteUrl()) === 0 ? '' : '_blank';
+			return `<a href="${ _.escapeHTML(url) }" title="${ _.escapeHTML(title) }" target="${ _.escapeHTML(target) }"><div class="inline-image" style="background-image: url(${ _.escapeHTML(url) });"></div></a>`;
+		});
+
+		// Support [Text](http://link)
+		msg = msg.replace(new RegExp(`\\[([^\\]]+)\\]\\(((?:${ schemes }):\\/\\/[^\\)]+)\\)`, 'gm'), function(match, title, url) {
+			const target = url.indexOf(Meteor.absoluteUrl()) === 0 ? '' : '_blank';
+			return `<a href="${ _.escapeHTML(url) }" target="${ _.escapeHTML(target) }">${ _.escapeHTML(title) }</a>`;
+		});
+
+		// Support <http://link|Text>
+		msg = msg.replace(new RegExp(`(?:<|&lt;)((?:${ schemes }):\\/\\/[^\\|]+)\\|(.+?)(?=>|&gt;)(?:>|&gt;)`, 'gm'), (match, url, title) => {
+			const target = url.indexOf(Meteor.absoluteUrl()) === 0 ? '' : '_blank';
+			return `<a href="${ _.escapeHTML(url) }" target="${ _.escapeHTML(target) }">${ _.escapeHTML(title) }</a>`;
+		});
+
+		if (RocketChat.settings.get('Markdown_Headers')) {
+			// Support # Text for h1
+			msg = msg.replace(/^# (([\S\w\d-_\/\*\.,\\][ \u00a0\u1680\u180e\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]?)+)/gm, '<h1>$1</h1>');
+
+			// Support # Text for h2
+			msg = msg.replace(/^## (([\S\w\d-_\/\*\.,\\][ \u00a0\u1680\u180e\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]?)+)/gm, '<h2>$1</h2>');
+
+			// Support # Text for h3
+			msg = msg.replace(/^### (([\S\w\d-_\/\*\.,\\][ \u00a0\u1680\u180e\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]?)+)/gm, '<h3>$1</h3>');
+
+			// Support # Text for h4
+			msg = msg.replace(/^#### (([\S\w\d-_\/\*\.,\\][ \u00a0\u1680\u180e\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]?)+)/gm, '<h4>$1</h4>');
+		}
+
+		// Support *text* to make bold
+		msg = msg.replace(/(^|&gt;|[ >_~`])\*{1,2}([^\*\r\n]+)\*{1,2}([<_~`]|\B|\b|$)/gm, '$1<span class="copyonly">*</span><strong>$2</strong><span class="copyonly">*</span>$3');
+
+		// Support _text_ to make italics
+		msg = msg.replace(/(^|&gt;|[ >*~`])\_([^\_\r\n]+)\_([<*~`]|\B|\b|$)/gm, '$1<span class="copyonly">_</span><em>$2</em><span class="copyonly">_</span>$3');
+
+		// Support ~text~ to strike through text
+		msg = msg.replace(/(^|&gt;|[ >_*`])\~{1,2}([^~\r\n]+)\~{1,2}([<_*`]|\B|\b|$)/gm, '$1<span class="copyonly">~</span><strike>$2</strike><span class="copyonly">~</span>$3');
+
+		// Support for block quote
+		// >>>
+		// Text
+		// <<<
+		msg = msg.replace(/(?:&gt;){3}\n+([\s\S]*?)\n+(?:&lt;){3}/g, '<blockquote class="background-transparent-darker-before"><span class="copyonly">&gt;&gt;&gt;</span>$1<span class="copyonly">&lt;&lt;&lt;</span></blockquote>');
+
+		// Support >Text for quote
+		msg = msg.replace(/^&gt;(.*)$/gm, '<blockquote class="background-transparent-darker-before"><span class="copyonly">&gt;</span>$1</blockquote>');
+
+		// Remove white-space around blockquote (prevent <br>). Because blockquote is block element.
+		msg = msg.replace(/\s*<blockquote class="background-transparent-darker-before">/gm, '<blockquote class="background-transparent-darker-before">');
+		msg = msg.replace(/<\/blockquote>\s*/gm, '</blockquote>');
+
+		// Remove new-line between blockquotes.
+		msg = msg.replace(/<\/blockquote>\n<blockquote/gm, '</blockquote><blockquote');
+
+		if (typeof window !== 'undefined' && window !== null ? window.rocketDebug : undefined) { console.log('Markdown', msg); }
+
+		return msg;
+	}
+}
+
+const Markdown = new MarkdownClass;
+RocketChat.Markdown = Markdown;
+
+// renderMessage already did html escape
+const MarkdownMessage = (message) => {
+	if (_.trim(message != null ? message.html : undefined)) {
+		message.html = Markdown.parseNotEscaped(message.html);
+	}
+
+	return message;
+};
+
+RocketChat.callbacks.add('renderMessage', MarkdownMessage, RocketChat.callbacks.priority.HIGH, 'markdown');
+
+if (Meteor.isClient) {
+	Blaze.registerHelper('RocketChatMarkdown', text => Markdown.parse(text));
+}

packages/rocketchat-markdown/markdowncode.js

@@ -0,0 +1,112 @@
+/*
+ * MarkdownCode is a named function that will parse `inline code` and ```codeblock``` syntaxes
+ * @param {Object} message - The message object
+ */
+import hljs from 'highlight.js';
+
+class MarkdownCode {
+	constructor(message) {
+
+		if (s.trim(message.html)) {
+			if (message.tokens == null) {
+				message.tokens = [];
+			}
+
+			MarkdownCode.handle_codeblocks(message);
+			MarkdownCode.handle_inlinecode(message);
+
+			if (window && window.rocketDebug) {
+				console.log('Markdown', message);
+			}
+		}
+
+		return message;
+	}
+
+	static handle_inlinecode(message) {
+		// Support `text`
+		return message.html = message.html.replace(/(^|&gt;|[ >_*~])\`([^`\r\n]+)\`([<_*~]|\B|\b|$)/gm, (match, p1, p2, p3) => {
+			const token = `=!=${ Random.id() }=!=`;
+
+			message.tokens.push({
+				token,
+				text: `${ p1 }<span class=\"copyonly\">\`</span><span><code class=\"code-colors inline\">${ p2 }</code></span><span class=\"copyonly\">\`</span>${ p3 }`,
+				noHtml: match
+			});
+
+			return token;
+		});
+	}
+
+	static handle_codeblocks(message) {
+		// Count occurencies of ```
+		const count = (message.html.match(/```/g) || []).length;
+
+		if (count) {
+
+			// Check if we need to add a final ```
+			if ((count % 2) > 0) {
+				message.html = `${ message.html }\n\`\`\``;
+				message.msg = `${ message.msg }\n\`\`\``;
+			}
+
+			// Separate text in code blocks and non code blocks
+			const msgParts = message.html.split(/(^.*)(```(?:[a-zA-Z]+)?(?:(?:.|\n)*?)```)(.*\n?)$/gm);
+
+			for (let index = 0; index < msgParts.length; index++) {
+				// Verify if this part is code
+				const part = msgParts[index];
+				const codeMatch = part.match(/^```(.*[\n\ ]?)([\s\S]*?)```+?$/);
+
+				if (codeMatch != null) {
+					// Process highlight if this part is code
+					let code;
+					let lang;
+					let result;
+					const singleLine = codeMatch[0].indexOf('\n') === -1;
+
+					if (singleLine) {
+						lang = '';
+						code = _.unescapeHTML(codeMatch[1] + codeMatch[2]);
+					} else {
+						lang = codeMatch[1];
+						code = _.unescapeHTML(codeMatch[2]);
+					}
+
+					if (s.trim(lang) === '') {
+						lang = '';
+					}
+
+					if (!Array.from(hljs.listLanguages()).includes(s.trim(lang))) {
+						result = hljs.highlightAuto((lang + code));
+					} else {
+						result = hljs.highlight(s.trim(lang), code);
+					}
+
+					const token = `=!=${ Random.id() }=!=`;
+
+					message.tokens.push({
+						highlight: true,
+						token,
+						text: `<pre><code class='code-colors hljs ${ result.language }'><span class='copyonly'>\`\`\`<br></span>${ result.value }<span class='copyonly'><br>\`\`\`</span></code></pre>`,
+						noHtml: `\`\`\`\n${ s.stripTags(result.value) }\n\`\`\``
+					});
+
+					msgParts[index] = token;
+				} else {
+					msgParts[index] = part;
+				}
+			}
+
+			// Re-mount message
+			return message.html = msgParts.join('');
+		}
+	}
+}
+
+RocketChat.MarkdownCode = MarkdownCode;
+
+const MarkdownCodeCB = (message) => new MarkdownCode(message);
+
+// MarkdownCode gets higher priority over Markdown so it's possible place a callback in between (katex for exmaple)
+RocketChat.callbacks.add('renderMessage', MarkdownCodeCB, RocketChat.callbacks.priority.HIGH - 2, 'markdowncode');