/**
 * @Author: KLIPFEL Arthur
 * @Date:   2018-08-24 12:17:17
 */
package plugin_manager

import (
	tb "gopkg.in/tucnak/telebot.v2"
	"io/ioutil"
	"log"
	"plugin"
	"strings"
)

type Plugin interface {
	Load()
	HandleMessage(bot *tb.Bot, msg string)
	Unload()
}

func GetSoFiles(dir string) []string {
	var slice []string

	files, err := ioutil.ReadDir(dir)
	if err != nil {
		log.Fatal(err)
	} else {
		for _, f := range files {
			if strings.HasSuffix(f.Name(), ".so") {
				slice = append(slice, f.Name())
			}
		}
	}
	return slice
}

func LoadSoFile(file string) Plugin {
	plug, err := plugin.Open(file)
	if err != nil {
		log.Fatal(err)
		return nil
	}

	symPlugin, err := plug.Lookup("Plugin")
	if err != nil {
		log.Fatal(err)
		return nil
	}

	var plugin Plugin
	plugin, ok := symPlugin.(Plugin)
	if !ok {
		log.Fatal(file + ": unexpected type from module symbol")
		return nil
	}
	return plugin
}