map extension

map.js

// http://stackoverflow.com/questions/164979/uk-postcode-regex-comprehensive

(function(){
    var maps = function(converter) {
        return [ { 
            type: 'lang', 
            filter: function(text) {
                return text.replace(/\[map (GIR 0AA|[A-PR-UWYZ]([A-HK-Y]([0-9][A-Z]?|[1-9][0-9])|[1-9]([0-9]|[A-HJKPSTUW])?) ?[0-9][ABD-HJLNP-UW-Z]{2})\]/ig, 'map');
            }
        }];
    };
    // Client-side export
    if (typeof window !== 'undefined' && window.Showdown && window.Showdown.extensions) { window.Showdown.extensions.maps = maps; }
    // Server-side export
    if (typeof module !== 'undefined') module.exports = maps;
}());