chore: add crypto payment

backend/gestion/handlers/crypto_payment.go

@@ -0,0 +1,107 @@
+package handlers
+
+import (
+	"encoding/json"
+	"gestion/db"
+	"gestion/services"
+	"io"
+	"log"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+)
+
+// IPNWebhook - POST /api/v1/webhooks/nowpayments
+// Reçoit les callbacks de NowPayments lors des changements de statut
+func IPNWebhook(c *gin.Context) {
+	database := c.MustGet("database").(*db.Database)
+	np, ok := c.MustGet("nowpayments").(*services.NowPaymentsClient)
+	if !ok || np == nil {
+		c.JSON(http.StatusServiceUnavailable, gin.H{"error": "paiement crypto non configuré"})
+		return
+	}
+
+	body, err := io.ReadAll(c.Request.Body)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "impossible de lire le corps"})
+		return
+	}
+
+	sig := c.GetHeader("x-nowpayments-sig")
+	if !np.VerifyIPN(body, sig) {
+		log.Printf("[IPN] signature invalide")
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "signature invalide"})
+		return
+	}
+
+	var payload services.IPNPayload
+	if err := json.Unmarshal(body, &payload); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "payload invalide"})
+		return
+	}
+
+	payment, err := database.GetCryptoPaymentByNowPaymentID(payload.PaymentID.String())
+	if err != nil || payment == nil {
+		log.Printf("[IPN] paiement introuvable: %s", payload.PaymentID.String())
+		// 200 pour éviter les retries NowPayments
+		c.JSON(http.StatusOK, gin.H{"ok": true})
+		return
+	}
+
+	payAmount, _ := payload.PayAmount.Float64()
+	if err := database.UpdateCryptoPaymentStatus(payment.ID, payload.PaymentStatus, payAmount); err != nil {
+		log.Printf("[IPN] erreur mise à jour paiement %d: %v", payment.ID, err)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "erreur base de données"})
+		return
+	}
+
+	switch payload.PaymentStatus {
+	case "finished", "confirmed":
+		if err := database.ActivateCryptoCommand(payment.CommandID); err != nil {
+			log.Printf("[IPN] erreur activation commande %d: %v", payment.CommandID, err)
+		} else {
+			log.Printf("[IPN] commande %d activée (paiement %s confirmé)", payment.CommandID, payload.PaymentID.String())
+		}
+	case "failed", "expired":
+		if err := database.CancelCryptoCommand(payment.CommandID); err != nil {
+			log.Printf("[IPN] erreur annulation commande %d: %v", payment.CommandID, err)
+		} else {
+			log.Printf("[IPN] commande %d annulée (paiement %s)", payment.CommandID, payload.PaymentStatus)
+		}
+	}
+
+	c.JSON(http.StatusOK, gin.H{"ok": true})
+}
+
+// GetCommandPaymentStatus - GET /api/v1/commands/:id/payment-status
+// Retourne le statut du paiement crypto d'une commande (polling côté client)
+func GetCommandPaymentStatus(c *gin.Context) {
+	database := c.MustGet("database").(*db.Database)
+
+	commandID, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "id de commande invalide"})
+		return
+	}
+
+	payment, err := database.GetCryptoPaymentByCommandID(commandID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "erreur base de données"})
+		return
+	}
+	if payment == nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "aucun paiement crypto pour cette commande"})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"command_id":     payment.CommandID,
+		"payment_status": payment.Status,
+		"pay_address":    payment.PayAddress,
+		"pay_amount":     payment.PayAmount,
+		"pay_currency":   payment.PayCurrency,
+		"price_amount":   payment.PriceAmount,
+		"price_currency": payment.PriceCurrency,
+	})
+}