router.coffee

class @Router
    constructor: (params = {}) ->
        @_rules = []
        for k, v of params.connect ? {}
            @connect(k, v)

    connect: (hash, action) ->
        @_rules.push( hash: hash, action: (action ? ->) )
        return @

    match: (url_hash, ev) ->
        ret = null
        url_hash = url_hash.replace( /^.*\#!?/, '' )  # '#' or '#!' を含む以前を削除

        for r in @_rules
            {hash: h, action: a} = r
            m = url_hash.match( @_build_regexp(h) )

            if m?
                ret = (o) ->
                    m.shift()
                    return a.apply(o, [m, ev])
                break

        if !ret?
            ret = (o) =>
                return @_cannot_route.apply(o, [url_hash, ev])

        return ret

    _build_regexp: (h) ->
        return new RegExp( ("^#{h}$").replace(/^\^+/, '^').replace(/\$+$/, '$') )

    _cannot_route: (h, ev) ->
        throw new Error('cannot route: ' + h)