index.js

'use strict';

/**
 * Convert JIRA markdown to Slack markdown
 *
 * @param {string} jiraMD The JIRA markdown
 * @return {string} The Slack markdown
 */
function toSlack (jiraMD) {
    let depths = [];
    let lastDepth = 0;

    return jiraMD
        // Quotes
        .replace(/\{quote\}/g, '```')

        // Stolen from: https://github.com/kylefarris/J2M
        // Un-ordered Lists
        .replace(/^[ \t]*(\*+)\s+/gm, (match, stars) => `${Array(stars.length).join('  ')}• `)
        .replace(/^-\s+/gm, () => '• ')

        // Ordered lists
        .replace(/^[ \t]*(#+)\s+/gm, (match, nums) => {
            const curDepth = nums.length - 1;
            if (curDepth === lastDepth) {
                depths[curDepth] = depths[curDepth] !== undefined ? depths[curDepth] + 1 : 1;
            } else if (curDepth > lastDepth) {
                depths[curDepth] = 1;
            } else {
                depths = depths.slice(0, curDepth + 1);
                depths[curDepth]++;
            }

            lastDepth = curDepth;
            return `${Array(curDepth + 1).join('  ')}${depths[curDepth]}. `;
        })

        // Headers 1-6
        .replace(/^h([0-6])\.(\s*)(.*)$/gm,
            (match, level, spacing, content) => `\n${spacing}*${content}*\n`)

        // Bold
        .replace(/\*(\s*)(\S.*?\S)(\s*)\*/g, '$1*$2*$3')

        // Italic
        .replace(/_(\s*)(\S.*?\S)(\s*)_/g, '$1_$2_$3')

        // Monospaced text
        .replace(/\{\{(.+?)\}\}/g, '`$1`')

        // Citations
        .replace(/\?\?([^??]+)\?\?/g, '_-- $1_')

        // Superscript
        .replace(/\^([^^]*)\^/g, '^$1')

        // Subscript
        .replace(/~([^~]*)~/g, '_$1')

        // Pre-formatted text
        .replace(/{noformat}/g, '```')

        // Named Links
        .replace(/\[([^[\]|]+?)\|([^[\]|]+?)\]/g, '<$2|$1>')

        // Un-named Links
        .replace(/\[([^|{}\\^~[\]\s"`]+\.[^|{}\\^~[\]\s"`]+)\]/g, '<$1>')

        // Smart Links
        .replace(/\[([^[\]|]+?)\|([^[\]|]+?)\|(smart-link)\]/g, '<$1>')

        // Strikethrough
        .replace(/((\W)-|(^)-)( *)(\S.*?\S)( *)(-(\W)|-($))/gm, '$2$3$4~$5~$6$8')

        // Code Block
        .replace(/\{code(:([a-z]+))?\}([^]*)\{code\}/gm, '```$2$3```')

        // Single Paragraph Blockquote
        .replace(/^bq\.\s+/gm, '> ')

        // Remove color: unsupported in md
        .replace(/\{color:[^}]+\}([^]*?)\{color\}/gm, '$1')

        // panel into table
        .replace(/\{panel:title=([^}]*)\}\n?([^]*?)\n?\{panel\}/gm, '\n| $1 |\n| --- |\n| $2 |')

        // table header
        .replace(/^[ \t]*((?:\|\|.*?)+\|\|)[ \t]*$/gm, (match, headers) => {
            const singleBarred = headers.replace(/\|\|/g, '|');
            return `\n${singleBarred}\n${singleBarred.replace(/\|[^|]+/g, '| --- ')}`;
        })

        // remove leading-space of table headers and rows
        .replace(/^[ \t]*\|/gm, '|');
}

/**
 * Convert JIRA markdown to Slack markdown
 *
 * @param {string} slackMD The Slack markdown
 * @return {string} The JIRA markdown
 */
function toJira (slackMD) {
    return slackMD
        // Quotes
        .replace(/```/g, '{code}')

        // Stolen from: https://github.com/kylefarris/J2M
        // Un-ordered Lists
        .replace(/^( *)• /gm, (match, spaces) => `*${Array((spaces.length / 2) + 1).join('*')} `)

        // Ordered lists
        .replace(/^( *)\d\.\s+/gm, (match, depth) => `#${Array((depth.length / 2) + 1).join('#')} `)

        // Headers 1-6
        .replace(/^\n?( *)\*([^*]+)\*\n/g,
            (match, level, content) => `h${level.length}. ${content}`)

        // Monospaced text
        .replace(/`([^`]+)`/g, '{{$1}}')

        // Citations
        .replace(/_-- ([^(_)]+)_/g, '??$1??')

        // Strikethrough
        .replace(/((\W)~|(^)~)(\S.*?\S)(~(\W)|~($))/gm, '$2-$4-$6')

        // Un-named Links
        .replace(/<([^|]+)>/g, '[$1]')

        // Named Links
        .replace(/<(.+)\|(.+?)>/g, '[$2|$1]')

        // Single Paragraph Blockquote
        .replace(/^> /gm, 'bq. ')

        // panel into table
        .replace(/\{panel:title=([^}]*)\}\n?([^]*?)\n?\{panel\}/gm, '\n| $1 |\n| --- |\n| $2 |')

        // table header
        .replace(/^[ \t]*((?:\|\|.*?)+\|\|)[ \t]*$/gm, (match, headers) => {
            const singleBarred = headers.replace(/\|\|/g, '|');
            return `\n${singleBarred}\n${singleBarred.replace(/\|[^|]+/g, '| --- ')}`;
        })

        // remove leading-space of table headers and rows
        .replace(/^[ \t]*\|/gm, '|');
}

module.exports = {
    toSlack,
    toJira
};