options.go

// Copyright (c) nano Authors and TFG Co. All Rights Reserved.
//
// 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 component

import (
	"reflect"
)

type (
	options struct {
		name       string              // component name
		nameFunc   func(string) string // rename handler name
		proxyChain *MethodProxyFuncOption
	}

	// Option used to customize handler
	Option func(options *options)
)

// WithName used to rename component name
func WithName(name string) Option {
	return func(opt *options) {
		opt.name = name
	}
}

// WithNameFunc override handler name by specific function
// such as: strings.ToUpper/strings.ToLower
func WithNameFunc(fn func(string) string) Option {
	return func(opt *options) {
		opt.nameFunc = fn
	}
}

// WithProxyFunc used to customize proxy function. To calling original method,
// use `component.DefaultHandlerMethodInvoke` for shortcut
func WithProxyFunc(methodOrName any, fn ...MethodProxyFunc) Option {
	return func(opt *options) {
		name := ""
		typ := reflect.TypeOf(methodOrName)
		switch typ.Kind() {
		case reflect.String:
			name = methodOrName.(string)
		case reflect.Func:
			name = reflect.TypeOf(methodOrName).Name()
		default:
			return
		}
		if opt.proxyChain == nil {
			opt.proxyChain = &MethodProxyFuncOption{
				Chains: make(map[string][]MethodProxyFunc),
			}
		}
		opt.proxyChain.Chains[name] = append(opt.proxyChain.Chains[name], fn...)
	}
}