options.go

// MIT License
//
// Copyright (c) 2020 Lack
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

package router

import (
	"github.com/vine-io/vine/core/registry"
	"github.com/vine-io/vine/core/registry/mdns"
	"github.com/vine-io/vine/lib/api/resolver"
	"github.com/vine-io/vine/lib/api/resolver/vpath"
)

type Options struct {
	Handler  string
	Registry registry.Registry
	Resolver resolver.Resolver
}

type Option func(o *Options)

func NewOptions(opts ...Option) Options {
	options := Options{
		Handler:  "meta",
		Registry: registry.DefaultRegistry,
	}

	for _, o := range opts {
		o(&options)
	}

	if options.Registry == nil {
		options.Registry = mdns.NewRegistry()
	}

	if options.Resolver == nil {
		options.Resolver = vpath.NewResolver(
			resolver.WithHandler(options.Handler),
		)
	}

	return options
}

func WithHandler(h string) Option {
	return func(o *Options) {
		o.Handler = h
	}
}

func WithRegistry(r registry.Registry) Option {
	return func(o *Options) {
		o.Registry = r
	}
}

func WithResolver(r resolver.Resolver) Option {
	return func(o *Options) {
		o.Resolver = r
	}
}