Markdown-2-Jira

script

	/**
	 * Takes Markdown and converts it to Jira formatted text
	 *
	 * @param {string} input
	 * @returns {string}
	 */
	function toJ(input) {
		// remove sections that shouldn't be recursively processed
		var START = 'J2MBLOCKPLACEHOLDER';
		var replacementsList = [];
		var counter = 0;
		
		input = input.replace(/`{3,}(\w+)?((?:\n|.)+?)`{3,}/g, function(match, synt, content) {
		    var code = '{code';
		
		    if (synt) {
		        code += ':' + synt;
		    }
		
		    code += '}' + content + '{code}';
		    var key = START + counter++ + '%%';
		    replacementsList.push({key: key, value: code});
		    return key;
		});
		
		input = input.replace(/`([^`]+)`/g, function(match, content) {
		    var code = '{{'+ content + '}}';
		    var key = START + counter++ + '%%';
		    replacementsList.push({key: key, value: code});
		    return key;
		});

		input = input.replace(/`([^`]+)`/g, '{{$1}}');

		input = input.replace(/^(.*?)\n([=-])+$/gm, function (match,content,level) {
			return 'h' + (level[0] === '=' ? 1 : 2) + '. ' + content;
		});

		input = input.replace(/^([#]+)(.*?)$/gm, function (match,level,content) {
			return 'h' + level.length + '.' + content;
		});

		input = input.replace(/([*_]+)(.*?)\1/g, function (match,wrapper,content) {
			var to = (wrapper.length === 1) ? '_' : '*';
			return to + content + to;
		});
		// Make multi-level bulleted lists work
  		input = input.replace(/^(\s*)- (.*)$/gm, function (match,level,content) {
    			var len = 2;
    			if(level.length > 0) {
        			len = parseInt(level.length/4.0) + 2;
    			}
    			return Array(len).join("-") + ' ' + content;
  		});

		var map = {
			cite: '??',
			del: '-',
			ins: '+',
			sup: '^',
			sub: '~'
		};

		input = input.replace(new RegExp('<(' + Object.keys(map).join('|') + ')>(.*?)<\/\\1>', 'g'), function (match,from,content) {
			//console.log(from);
			var to = map[from];
			return to + content + to;
		});

		input = input.replace(/~~(.*?)~~/g, '-$1-');

		input = input.replace(/\[([^\]]+)\]\(([^)]+)\)/g, '[$1|$2]');
		input = input.replace(/<([^>]+)>/g, '[$1]');

		// restore extracted sections
		for(var i =0; i < replacementsList.length; i++){
		    var sub = replacementsList[i];
		    input = input.replace(sub["key"], sub["value"]);
		}

		// Convert header rows of tables by splitting input on lines
		lines = input.split(/\r?\n/gm);
		lines_to_remove = []
		for (var i = 0; i < lines.length; i++) {
			line_content = lines[i];

			if (line_content.match(/\|---/g) != null) {
				lines[i-1] = lines[i-1].replace(/\|/g, "||")
				lines.splice(i, 1)
			}
		}

		// Join the split lines back
		input = ""
		for (var i = 0; i < lines.length; i++) {
			input += lines[i] + "\n"
		}
		return input;
	};

draft.content = toJ(draft.content);