244 lines
6.9 KiB
Go
244 lines
6.9 KiB
Go
package controllers
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"net/http"
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"os"
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"time"
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"s-class-backend/config" // IMPORT WAJIB UNTUK KONEKSI DATABASE
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mqtt "github.com/eclipse/paho.mqtt.golang"
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"github.com/gin-gonic/gin"
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)
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// --- STRUKTUR DATA REQUEST ---
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type DeviceControlRequest struct {
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Device string `json:"device"`
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Action string `json:"action"`
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}
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type VerifyRequest struct {
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Token string `json:"token"`
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}
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// --- CACHE STATUS HARDWARE (Mengingat status terakhir perangkat) ---
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var DeviceStatusCache = map[string]string{
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"lampu1": "off",
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"lampu2": "off",
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"ac": "off",
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"projector": "off",
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}
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// =========================================================================
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// FUNGSI 1: VERIFIKASI HARDWARE & HITUNG SISA WAKTU DINAMIS
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// =========================================================================
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func VerifyHardwareCode(c *gin.Context) {
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var req VerifyRequest
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if err := c.ShouldBindJSON(&req); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"error": "Format token tidak valid"})
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return
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}
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tokenInput := req.Token
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sekarang := time.Now()
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var jamSelesai time.Time
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isTokenValid := false
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// Struktur penampung jam selesai dari database
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type ResultTime struct {
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JamSelesai time.Time `gorm:"column:end_time"` // PASTIKAN NAMA KOLOM 'end_time' SESUAI DENGAN YANG ADA DI DATABASE
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}
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var result ResultTime
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// 1. Cek di tabel bookings (Redeem Code)
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errBooking := config.DB.Table("bookings").
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Select("end_time").
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Where("redeem_code = ?", tokenInput).
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Scan(&result).Error
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if errBooking == nil && !result.JamSelesai.IsZero() {
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jamSelesai = result.JamSelesai
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isTokenValid = true
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fmt.Println("[VERIFY] Token ditemukan di tabel bookings!")
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} else {
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// 2. Cek di tabel class_schedules (Kode MK)
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errSchedule := config.DB.Table("class_schedules").
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Select("end_time").
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Where("kode_mk = ?", tokenInput).
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Scan(&result).Error
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if errSchedule == nil && !result.JamSelesai.IsZero() {
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jamSelesai = result.JamSelesai
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isTokenValid = true
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fmt.Println("[VERIFY] Token ditemukan di tabel class_schedules!")
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}
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}
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// Jika token tidak ditemukan di kedua tabel (Token Acak/Salah)
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if !isTokenValid {
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fmt.Printf("[VERIFY] Token %s SALAH atau tidak ditemukan.\n", tokenInput)
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c.JSON(http.StatusUnauthorized, gin.H{"error": "Token salah atau tidak ditemukan"})
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return
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}
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// 3. Kalkulasi Selisih Waktu
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// Gabungkan tanggal hari ini dengan jam dari database
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jamSelesaiHariIni := time.Date(sekarang.Year(), sekarang.Month(), sekarang.Day(),
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jamSelesai.Hour(), jamSelesai.Minute(), jamSelesai.Second(), 0, sekarang.Location())
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selisihWaktu := jamSelesaiHariIni.Sub(sekarang)
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sisaMenit := int(selisihWaktu.Minutes())
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// 4. Proteksi Jika Waktu Sudah Habis (Lebih dari jam selesai)
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if sisaMenit <= 0 {
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c.JSON(http.StatusForbidden, gin.H{"error": "Waktu peminjaman sudah habis"})
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return
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}
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// 5. Kirim balasan sukses ke ESP32 beserta durasinya
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c.JSON(http.StatusOK, gin.H{
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"status": "success",
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"message": "Token Valid",
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"duration_minutes": sisaMenit,
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})
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}
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// =========================================================================
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// FUNGSI 2: KONTROL DEVICE VIA HOME ASSISTANT & MQTT
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// =========================================================================
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func ControlHardware(c *gin.Context) {
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var req DeviceControlRequest
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if err := c.ShouldBindJSON(&req); err != nil {
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c.JSON(http.StatusBadRequest, gin.H{"error": "Format data tidak valid"})
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return
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}
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if req.Device == "lampu1" || req.Device == "lampu2" {
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broker := os.Getenv("MQTT_BROKER")
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user := os.Getenv("MQTT_USER")
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pass := os.Getenv("MQTT_PASSWORD")
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opts := mqtt.NewClientOptions()
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opts.AddBroker(broker)
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opts.SetUsername(user)
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opts.SetPassword(pass)
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opts.SetClientID(fmt.Sprintf("Golang-SCLASS-%d", time.Now().Unix()))
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client := mqtt.NewClient(opts)
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if token := client.Connect(); token.Wait() && token.Error() != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "Golang gagal terhubung ke MQTT Broker"})
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return
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}
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defer client.Disconnect(250)
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topic := fmt.Sprintf("sclass/d101/%s", req.Device)
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token := client.Publish(topic, 0, false, req.Action)
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token.Wait()
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DeviceStatusCache[req.Device] = req.Action
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c.JSON(http.StatusOK, gin.H{
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"status": "success",
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"message": fmt.Sprintf("Berhasil mengirim perintah %s ke %s via MQTT", req.Action, req.Device),
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})
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return
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}
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if req.Device == "ac" || req.Device == "projector" {
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haURL := os.Getenv("HA_URL")
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haToken := os.Getenv("HA_TOKEN")
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var entityID string
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switch req.Device {
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case "ac":
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if req.Action == "on" {
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entityID = "scene.ac_d101_on"
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} else {
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entityID = "scene.ac_d101_off"
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}
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case "projector":
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if req.Action == "on" {
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entityID = "scene.projector_d101_on"
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} else {
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entityID = "scene.projector_d101_off"
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}
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}
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apiURL := fmt.Sprintf("%s/api/services/scene/turn_on", haURL)
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payload := map[string]string{"entity_id": entityID}
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jsonPayload, _ := json.Marshal(payload)
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reqHA, err := http.NewRequest("POST", apiURL, bytes.NewBuffer(jsonPayload))
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if err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"error": "Gagal membuat request ke HA"})
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return
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}
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reqHA.Header.Set("Authorization", "Bearer "+haToken)
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reqHA.Header.Set("Content-Type", "application/json")
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httpClient := &http.Client{Timeout: 5 * time.Second}
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resp, err := httpClient.Do(reqHA)
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if err != nil {
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c.JSON(http.StatusGatewayTimeout, gin.H{"error": "Gagal menghubungi Home Assistant"})
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return
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}
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defer resp.Body.Close()
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c.JSON(http.StatusOK, gin.H{
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"status": "success",
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"message": fmt.Sprintf("Berhasil memicu scene %s", entityID),
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})
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return
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}
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c.JSON(http.StatusBadRequest, gin.H{"error": "Device tidak dikenali sistem"})
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}
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// =========================================================================
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// FUNGSI 3: MENDAPATKAN STATUS DAYA DARI HOME ASSISTANT
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// =========================================================================
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func GetPowerStatus(c *gin.Context) {
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haURL := os.Getenv("HA_URL")
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haToken := os.Getenv("HA_TOKEN")
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entityID := "sensor.kwh_meter_power"
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apiURL := fmt.Sprintf("%s/api/states/%s", haURL, entityID)
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req, _ := http.NewRequest("GET", apiURL, nil)
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req.Header.Set("Authorization", "Bearer "+haToken)
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req.Header.Set("Content-Type", "application/json")
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client := &http.Client{}
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resp, err := client.Do(req)
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if err != nil {
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c.JSON(http.StatusInternalServerError, gin.H{"power": 0})
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return
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}
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defer resp.Body.Close()
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var result map[string]interface{}
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json.NewDecoder(resp.Body).Decode(&result)
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powerStr, ok := result["state"].(string)
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if !ok {
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c.JSON(http.StatusOK, gin.H{"power": 0})
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return
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}
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c.JSON(http.StatusOK, gin.H{"power": powerStr})
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}
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// =========================================================================
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// FUNGSI 4: MENGAMBIL STATUS PERANGKAT SECARA REAL-TIME
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// =========================================================================
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func GetHardwareStatus(c *gin.Context) {
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c.JSON(http.StatusOK, gin.H{
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"status": "success",
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"data": DeviceStatusCache,
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})
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} |