Extends String

(function (win) {
    'using strict';
    String.PAD_LEFT = 1;
    String.PAD_RIGHT = 2;
    String.PAD_BOTH = 3;

    var proto = String.prototype;

    proto.template = function (o) {
        return this.replace(/\{(.*?)\}/g, function (s, m) {
            var ks = m.split('.'),
                ret = o;
            for (var i = 0; i < ks.length; ++i)
                ret = ret[ks[i]];
            return ret;
        });
    };

    proto.startsWith = function (s) {
        return s == this.substr(0, s.length);
    };

    proto.endsWith = function (s) {
        return s == this.substr(-s.length);
    };

    proto.contains = function (s) {
        return this.indexOf(s) >= 0;
    };

    proto.reverse = function () {
        return this.split('').reverse().join('');
    };

    proto.repeat = function (n) {
        return Array(++n).join(this);
    };

    proto.pad = function (l, s, t) {
        var r = this;
        s = null == s ? ' ' : (s += '');
        t = (t & String.PAD_BOTH) || String.PAD_RIGHT;
        if (s.length && r.length < l) {
            l -= r.length;
            if (t == String.PAD_BOTH)
                l /= 2;
            s = s.repeat(Math.ceil(l / s.length));
            if (t & String.PAD_LEFT)
                r = s.substr(0, (t == String.PAD_BOTH) ? Math.floor(l) : l) + r;
            if (t & String.PAD_RIGHT)
                r += s.substr(0, (t == String.PAD_BOTH) ? Math.ceil(l) : l);
        }
        return r;
    };

    proto.padLeft = function (l, s) {
        return this.pad(l, s, String.PAD_LEFT);
    };

    proto.padRight = function (l, s) {
        return this.pad(l, s, String.PAD_RIGHT);
    };

    proto.padBoth = function (l, s) {
        return this.pad(l, s, String.PAD_BOTH);
    };

    proto.wrap = function (l, br) {
        var lines, i, j, match, indent, words;
        l = null == l ? 78 : l;
        br = null == br ? '\n' : br;
        lines = this.split(/\n/);
        for (i = 0; i < lines.length; ++i) {
            match = lines[i].match(/^[ \t]+/);
            indent = null == match ? '' : match[0];
            words = lines[i].words();
            for (j = 0; j < words.length; ++j) {
                //
            }
            lines[i] = indent + $.join(br);
        }
        return lines.join('\n');
    };

    proto.words = function () {
        var s = this;
        return (s = s.trim().replace(/\s+/g, ' ')) ? s.split(' ') : [];
    };

    proto.addSlashes = function () {
        return this.replace(/([\\'"])/g, '\\$1');
    };

    proto.stripSlashes = function () {
        return this.replace(/\\([\\'"])/g, '$1');
    };

    proto.encodeHTML = function () {
        return this.replace(/[<>&"']/g, function (u) {
            return  {
                '<': '&lt;',
                '>': '&gt;',
                '&': '&amp;',
                '"': '&quot;'
            }[u];
        });
    };

    proto.decodeHTML = function () {
        var el = document.createElement('div');
        el.innerHTML = this.replace('<', '&lt;').replace('>', '&gt;');
        return el.textContent;
    };
})();