modified: .env

modified:   bot.db
	modified:   db/db.go
	modified:   handlers/webhook.go
	modified:   services/whatsapp.go

services/whatsapp.go

@@ -1 +1,43 @@
 package services
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+)
+
+// SendWhatsAppMessage sends a text reply to a user
+func SendWhatsAppMessage(toPhone string, messageBody string) error {
+	token := os.Getenv("WHATSAPP_TOKEN")      // "EAA..."
+	phoneID := os.Getenv("WHATSAPP_PHONE_ID") // "100..."
+	version := "v17.0"
+	url := fmt.Sprintf("https://graph.facebook.com/%s/%s/messages", version, phoneID)
+
+	payload := map[string]interface{}{
+		"messaging_product": "whatsapp",
+		"to":                toPhone,
+		"type":              "text",
+		"text": map[string]string{
+			"body": messageBody,
+		},
+	}
+
+	jsonData, _ := json.Marshal(payload)
+	req, _ := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
+	req.Header.Set("Authorization", "Bearer "+token)
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode >= 400 {
+		return fmt.Errorf("whatsapp api error: status %d", resp.StatusCode)
+	}
+
+	return nil
+}