Checkpoint 3

.gitignore

@@ -1,2 +1,3 @@
 .idea
 godoor
+godoor_server/godoor_server

godoor.go

@@ -2,11 +2,13 @@ package main
 
 import (
 	"bufio"
+	"bytes"
 	"context"
 	"encoding/json"
 	"fmt"
 	"github.com/joho/godotenv"
 	"io"
+	"log"
 	"net/http"
 	"os"
 	"os/signal"
@@ -31,17 +33,14 @@ type cardList struct {
 	} `json:"allowed_uids"`
 }
 
-type simpleUids struct {
-	tokens []string
-}
-
 type ValidUids map[string]bool // bool has no meaning
 
 type Config struct {
-	door     string
+	door         string
-	uid_salt string
+	uidSalt      string
-	mock     string
+	doorOpenTime string
-	api      struct {
+	mock         bool
+	api          struct {
 		allowed  string
 		longpoll string
 		swipe    string
@@ -66,26 +65,29 @@ func main() {
 	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")
+	config.uidSalt = os.Getenv("KDOORPI_UID_SALT")
-	config.mock = os.Getenv("KDOORPI_MOCK_HW")
+	config.doorOpenTime = os.Getenv("KDOORPI_OPEN_TIME")
+	_, config.mock = os.LookupEnv("KDOORPI_MOCK_HW")
 
-	if config.mock == "true" {
+	go func() {
+		setup()
+	}()
+
+	<-ctx.Done()
+	log.Printf("Cleanup\n")
+
+	// cleanup
+}
+func setup() {
+	log.Println("Started Setup")
+
+	if config.mock {
+		log.Println("MOCK mode enabled")
 		wiegand = &WiegandMock{}
 	} else {
 		wiegand = WiegandSetup(wiegand_a, wiegand_b, wiegand_bit_timeout, solenoid)
 	}
-
+	log.Println("HW Setup done")
-	http.DefaultClient.Timeout = 120 * time.Second
-
-	for {
-		err := reloadTokens()
-		if err == nil {
-			break
-		}
-		time.Sleep(10 * time.Second)
-	}
-
-	go cardRunner(wiegand)
 
 	go func() {
 		for {
@@ -93,12 +95,44 @@ func main() {
 		}
 	}()
 
-	fmt.Printf("Sleeping\n")
+	log.Println("Initialized longpoll event loop")
 
-	<-ctx.Done()
+	http.DefaultClient.Timeout = 120 * time.Second
-	fmt.Printf("Cleanup\n")
 
-	// cleanup
+	for {
+		log.Println("Start initial token population")
+		err := reloadTokens()
+		if err == nil {
+			break
+		}
+		log.Printf("Initial token population failed. err: %v", err)
+		log.Println("Retrying in 10 seconds...")
+		time.Sleep(10 * time.Second)
+	}
+
+	log.Println("Initial token population success")
+
+	go cardRunner(wiegand)
+
+	log.Println("Setup completed")
+}
+
+func OpenAndCloseDoor(w Wiegand) error {
+	err := w.OpenDoor()
+	if err != nil {
+		return err
+	}
+	fmt.Println("Door is now open")
+
+	time.Sleep(5 * time.Second)
+
+	err = w.CloseDoor()
+	if err != nil {
+		return err
+	}
+	fmt.Println("Door is now closed")
+
+	return nil
 }
 
 func cardRunner(w Wiegand) {
@@ -110,16 +144,26 @@ func cardRunner(w Wiegand) {
 
 		printCardId(card)
 		hashedHex := hashCardUid(card)
-		fmt.Println(hashedHex)
+		log.Println(hashedHex)
+
+		go func() {
+			err := sendSwipeEvent(hashedHex)
+			if err != nil {
+				log.Println("Failed to send swipe event: %v", err)
+			}
+		}()
 
 		globalLock.Lock()
 		ok := validUids[hashedHex]
 		globalLock.Unlock()
 		if ok {
-			fmt.Println("Opening door")
+			log.Println("Opening door")
-			w.OpenDoor()
+			err := OpenAndCloseDoor(w)
+			if err != nil {
+				log.Println("There was an error opening and closing the Door")
+			}
 		} else {
-			fmt.Println("Unknown card")
+			log.Println("Unknown card")
 		}
 
 	}
@@ -159,7 +203,7 @@ func waitEvents() error {
 	if err != nil {
 		return err
 	}
-	fmt.Printf("%v\n", resp)
+	log.Printf("%v\n", resp)
 
 	reader := bufio.NewReader(resp.Body)
 	for {
@@ -173,9 +217,12 @@ func waitEvents() error {
 			if !found_data {
 				continue
 			}
-			fmt.Printf("got server data: %q\n", data)
+			log.Printf("got server data: %q\n", data)
 			if strings.TrimSpace(data) == config.door {
-				wiegand.OpenDoor()
+				err := OpenAndCloseDoor(wiegand)
+				if err != nil {
+					log.Println("There was an error opening and closing the Door")
+				}
 			}
 
 			go reloadTokens()
@@ -183,7 +230,7 @@ func waitEvents() error {
 
 	}
 
-	fmt.Printf("%v\n", resp)
+	log.Printf("%v\n", resp)
 	return nil
 }
 
@@ -197,7 +244,7 @@ func reloadTokens() error {
 	if err != nil {
 		return err
 	}
-	fmt.Printf("%v\n", resp)
+	log.Printf("%v\n", resp)
 
 	var cl cardList
 
@@ -215,9 +262,38 @@ func reloadTokens() error {
 	defer globalLock.Unlock()
 	validUids = make(ValidUids)
 	for i, val := range cl.AllowedUids {
-		fmt.Printf("%d: %+v\n", i, val.Token.UidHash)
+		log.Printf("%d: %+v\n", i, val.Token.UidHash)
 		validUids[val.Token.UidHash] = true
 	}
 
 	return nil
 }
+
+func sendSwipeEvent(cardUidHash string) error {
+	swipeEvent := map[string]string{
+		"uid_hash":  cardUidHash,
+		"door":      config.door,
+		"timestamp": time.Now().Format(time.DateTime),
+	}
+
+	data, err := json.Marshal(swipeEvent)
+	if err != nil {
+		return err
+	}
+
+	req, err := http.NewRequest(http.MethodPost, config.api.swipe, bytes.NewReader(data))
+	if err != nil {
+		return err
+	}
+	req.Header.Add("KEY", config.api.key)
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return err
+	}
+
+	if !(resp.StatusCode >= 200 && resp.StatusCode < 300) {
+		return fmt.Errorf("Server responded with %d", resp.StatusCode)
+	}
+
+	return nil
+}

godoor_server/godoor_server.go

@@ -38,7 +38,7 @@ func getAllowed(w http.ResponseWriter, r *http.Request) {
 	keys := cardList{
 		AllowedUids: []cardToken{
 			{card{UidHash: "d72c87d0f077c7766f2985dfab30e8955c373a13a1e93d315203939f542ff86e73ee37c31f4c4b571f4719fa8e3589f12db8dcb57ea9f56764bb7d58f64cf705"}},
-			{card{UidHash: "112233445566"}},
+			{card{UidHash: "873636abbcf597a4835afc1c9b16a72eb6175b7ab278a8f18ab13c50172c90ea97cc3e258efd9cc1d885d7ea32d87fd006907892793e7cd6c468417bd8b8421a"}},
 			{card{UidHash: "aabbccddeeff"}},
 		},
 	}
@@ -114,6 +114,10 @@ func (doobserver *DoorBoyServer) postOpenDoor(w http.ResponseWriter, r *http.Req
 	w.Write([]byte("OK"))
 }
 
+func postCardSwipe(w http.ResponseWriter, r *http.Request) {
+
+}
+
 func main() {
 	doorboyserver := DoorBoyServer{longPollers: map[string]chan string{}}
 	http.HandleFunc("/", getRoot)
@@ -121,6 +125,7 @@ func main() {
 	http.HandleFunc("/longpoll", doorboyserver.getLongPoll)
 	http.HandleFunc("/jspoll", doorboyserver.getLongPollJson)
 	http.HandleFunc("/open", doorboyserver.postOpenDoor)
+	http.HandleFunc("/cardswipe", postCardSwipe)
 
 	err := http.ListenAndServe(":3333", nil)
 

wiegand.go

@@ -5,6 +5,7 @@ import (
 	"encoding/hex"
 	"fmt"
 	"golang.org/x/crypto/scrypt"
+	"log"
 	"time"
 )
 
@@ -14,7 +15,9 @@ import (
 
 type Wiegand interface {
 	GetCardUid() (uint64, error)
-	OpenDoor()
+	OpenDoor() error
+	CloseDoor() error
+	IsDoorOpen() (bool, error)
 }
 
 type WiegandHW struct {
@@ -28,15 +31,21 @@ type WiegandHW struct {
 	solenoidLine *gpiod.Line
 }
 
-func (w *WiegandHW) OpenDoor() {
+func (w *WiegandHW) OpenDoor() error {
-	fmt.Println("Open")
+	return w.solenoidLine.SetValue(1)
-	w.solenoidLine.SetValue(1)
-	d, _ := time.ParseDuration("500ms")
-	time.Sleep(d)
-	w.solenoidLine.SetValue(0)
-	fmt.Println("Close")
 }
 
+func (w *WiegandHW) CloseDoor() error {
+	return w.solenoidLine.SetValue(0)
+}
+
+func (w *WiegandHW) IsDoorOpen() (bool, error) {
+	i, err := w.solenoidLine.Value()
+	if err != nil {
+		return false, err
+	}
+	return i == 1, nil
+}
 func printCardId(card uint64) {
 	for i := 0; i < 7; i++ {
 		fmt.Printf("%02x", (card>>(8*i))&0xff)
@@ -47,7 +56,7 @@ func printCardId(card uint64) {
 func hashCardUid(card uint64) string {
 	b := make([]byte, 8)
 	binary.LittleEndian.PutUint64(b, card)
-	hashed, err := scrypt.Key(b, []byte(config.uid_salt), 16384, 8, 1, 64)
+	hashed, err := scrypt.Key(b, []byte(config.uidSalt), 16384, 8, 1, 64)
 	if err != nil {
 		panic(err) // can only happen when scrypt params are garbage
 	}
@@ -58,10 +67,9 @@ func hashCardUid(card uint64) string {
 
 func (w *WiegandHW) GetCardUid() (uint64, error) {
 	// Wait for bit timeout
-	fmt.Printf("Waiting for bit timeout\n")
+	log.Printf("Waiting for bit timeout\n")
 
 	<-w.bitTimeoutTimer.C
-	fmt.Printf("\n")
 
 	defer func() { w.bitNr = 0 }()
 

wiegand_mock.go

@@ -1,23 +1,32 @@
 package main
 
 import (
-	"fmt"
 	"time"
 )
 
 type WiegandMock struct {
 	mockUid uint64
+
+	openState bool
 }
 
-func (*WiegandMock) OpenDoor() {
+func (w *WiegandMock) OpenDoor() error {
-	fmt.Println("Door is now open")
+	w.openState = true
-	time.Sleep(500 * time.Millisecond)
+	return nil
-	fmt.Println("Door is now closed")
+}
+
+func (w *WiegandMock) CloseDoor() error {
+	w.openState = false
+	return nil
+}
+
+func (w *WiegandMock) IsDoorOpen() (bool, error) {
+	return w.openState, nil
 }
 
 func (w *WiegandMock) GetCardUid() (uint64, error) {
 	time.Sleep(1 * time.Second)
-	return w.mockUid, fmt.Errorf("err")
+	return w.mockUid, nil //fmt.Errorf("err")
 }
 
 func (w *WiegandMock) SetMockUid(mockUid uint64) {