constructor() {

this.routes = [];

this.all = this.add.bind(this, '');

this.get = this.add.bind(this, 'GET');

this.head = this.add.bind(this, 'HEAD');

this.patch = this.add.bind(this, 'PATCH');

this.options = this.add.bind(this, 'OPTIONS');

this.connect = this.add.bind(this, 'CONNECT');

this.delete = this.add.bind(this, 'DELETE');

this.trace = this.add.bind(this, 'TRACE');

this.post = this.add.bind(this, 'POST');

this.put = this.add.bind(this, 'PUT');

}

use(route, ...fns) {

let handlers = [].concat.apply([], fns);

let { keys, pattern } = parse(route, true);

this.routes.push({ keys, pattern, method:'', handlers });

return this;

}

add(method, route, ...fns) {

let { keys, pattern } = parse(route);

let handlers = [].concat.apply([], fns);

this.routes.push({ keys, pattern, method, handlers });

return this;

}

find(method, url) {

let isHEAD=(method === 'HEAD');

let i=0, j=0, k, tmp, arr=this.routes;

let matches=[], params={}, handlers=[];

for (; i < arr.length; i++) {

tmp = arr[i];

if (tmp.method.length === 0 || tmp.method === method || isHEAD && tmp.method === 'GET') {

if (tmp.keys === false) {

matches = tmp.pattern.exec(url);

if (matches === null) continue;

if (matches.groups !== void 0) for (k in matches.groups) params[k]=matches.groups[k];

tmp.handlers.length > 1 ? (handlers=handlers.concat(tmp.handlers)) : handlers.push(tmp.handlers[0]);

} else if (tmp.keys.length > 0) {

matches = tmp.pattern.exec(url);

if (matches === null) continue;

for (j=0; j < tmp.keys.length;) params[tmp.keys[j]]=matches[++j];

tmp.handlers.length > 1 ? (handlers=handlers.concat(tmp.handlers)) : handlers.push(tmp.handlers[0]);

} else if (tmp.pattern.test(url)) {

tmp.handlers.length > 1 ? (handlers=handlers.concat(tmp.handlers)) : handlers.push(tmp.handlers[0]);

}

} // else not a match

}

return { params, handlers };

}