godoor/godoor.go

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"github.com/joho/godotenv"
	"io"
	"net/http"
	"os"
	"os/signal"
	"syscall"
)
import "time"

const wiegand_a = 17
const wiegand_b = 18
const wiegand_bit_timeout = time.Millisecond * 8
const solenoid = 21

type card struct {
	UidHash string `json:"uid_hash"`
}

type cardList struct {
	AllowedUids []struct {
		Token card `json:"token"`
	} `json:"allowed_uids"`
}

type simpleUids struct {
	tokens []string
}

type ValidUids map[string]bool // bool has no meaning

type Config struct {
	door     string
	uid_salt string
	api      struct {
		allowed  string
		longpoll string
		swipe    string
		key      string
	}
}

var config Config

func main() {

	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
	defer cancel()

	godotenv.Load()

	config.door = os.Getenv("KDOORPI_DOOR")
	config.api.allowed = os.Getenv("KDOORPI_API_ALLOWED")
	config.api.longpoll = os.Getenv("KDOORPI_API_LONGPOLL")
	config.api.swipe = os.Getenv("KDOORPI_API_SWIPE")
	config.api.key = os.Getenv("KDOORPI_API_KEY")
	config.uid_salt = os.Getenv("KDOORPI_UID_SALT")

	//wiegand := WiegandSetup(wiegand_a, wiegand_b, wiegand_bit_timeout, solenoid)

	http.DefaultClient.Timeout = 60

	reloadTokens()

	//go wiegand.cardRunner(validUids)

	waitEvents()

	fmt.Printf("Sleeping\n")

	<-ctx.Done()
	fmt.Printf("Cleanup\n")

	// cleanup
}

func waitEvents() {
	req, err := http.NewRequest(http.MethodGet, config.api.longpoll, nil)
	if err != nil {
		panic(err)
	}
	req.Header.Add("KEY", config.api.key)
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	fmt.Printf("%v\n", resp)

	_, err = io.ReadAll(resp.Body)
	if err != nil {
		panic(err)
	}

	fmt.Printf("%v\n", resp)

}

func reloadTokens() {
	req, err := http.NewRequest(http.MethodGet, config.api.allowed, nil)
	if err != nil {
		panic(err)
	}
	req.Header.Add("KEY", config.api.key)
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	fmt.Printf("%v\n", resp)

	var cl cardList

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		panic(err)
	}

	err = json.Unmarshal(body, &cl)
	if err != nil {
		panic(err)
	}

	validUids := make(ValidUids)
	for i, val := range cl.AllowedUids {
		fmt.Printf("%d: %+v\n", i, val.Token.UidHash)
		validUids[val.Token.UidHash] = false
	}
}