/*\
title: $:/core/modules/parsers/wikiparser/rules/codeblock.js
type: application/javascript
module-type: wikirule

Wiki text rule for code blocks. For example:

```
	```
	This text will not be //wikified//
	```
```

\*/
(function(){

/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";

exports.name = "codeblock";
exports.types = {block: true};

exports.init = function(parser) {
	this.parser = parser;
	// Regexp to match and get language if defined
	this.matchRegExp = /```([\w-]*)\r?\n/mg;
};

exports.parse = function() {
	var reEnd = /(\r?\n```$)/mg;
	// Move past the match
	this.parser.pos = this.matchRegExp.lastIndex;

	// Look for the end of the block
	reEnd.lastIndex = this.parser.pos;
	var match = reEnd.exec(this.parser.source),
		text;
	// Process the block
	if(match) {
		text = this.parser.source.substring(this.parser.pos,match.index);
		this.parser.pos = match.index + match[0].length;
	} else {
		text = this.parser.source.substr(this.parser.pos);
		this.parser.pos = this.parser.sourceLength;
	}
	// Return the $codeblock widget
	return [{
			type: "codeblock",
			attributes: {
					code: {type: "string", value: text},
					language: {type: "string", value: this.match[1]}
			}
	}];
};

})();
