Update app.py

app.py

@@ -120,18 +120,33 @@ def _ok_html(text):
     return f"<div style='padding:10px;border:1px solid #2ea043;border-radius:5px;color:#2ea043;background-color:#333333;'>✅ {text}</div>"
 
 # --- Email support ---
-def send_email(recipient: str, subject: str, body_text: str, attachment_name: str = None, attachment_json: dict = None) -> str:
-    """Returns '' on success, or error message string."""
-    host = os.getenv("SMTP_HOST")
-    port = int(os.getenv("SMTP_PORT", "587"))
-    user = os.getenv("SMTP_USER")
-    pwd  = os.getenv("SMTP_PASS")
-    from_addr = os.getenv("EMAIL_FROM")
+import base64, json, requests
+from email.message import EmailMessage
 
-    if not all([host, port, user, pwd, from_addr]):
-        return "Email is not configured (set SMTP_HOST, SMTP_PORT, SMTP_USER, SMTP_PASS, EMAIL_FROM)."
+def _gmail_access_token() -> str:
+    token_url = "https://oauth2.googleapis.com/token"
+    data = {
+        "client_id": os.getenv("GMAIL_CLIENT_ID"),
+        "client_secret": os.getenv("GMAIL_CLIENT_SECRET"),
+        "refresh_token": os.getenv("GMAIL_REFRESH_TOKEN"),
+        "grant_type": "refresh_token",
+    }
+    r = requests.post(token_url, data=data, timeout=20)
+    r.raise_for_status()
+    return r.json()["access_token"]
+
+def send_email(recipient: str, subject: str, body_text: str,
+               attachment_name: str = None, attachment_json: dict = None) -> str:
+    """
+    Sends via Gmail API. Returns '' on success, or an error string.
+    """
+    from_addr = os.getenv("EMAIL_FROM")
+    if not all([os.getenv("GMAIL_CLIENT_ID"), os.getenv("GMAIL_CLIENT_SECRET"),
+                os.getenv("GMAIL_REFRESH_TOKEN"), from_addr]):
+        return "Gmail API not configured (set GMAIL_CLIENT_ID, GMAIL_CLIENT_SECRET, GMAIL_REFRESH_TOKEN, EMAIL_FROM)."
 
     try:
+        # Build MIME message
         msg = EmailMessage()
         msg["From"] = from_addr
         msg["To"] = recipient
@@ -142,10 +157,17 @@ def send_email(recipient: str, subject: str, body_text: str, attachment_name: st
             payload = json.dumps(attachment_json, indent=2).encode("utf-8")
             msg.add_attachment(payload, maintype="application", subtype="json", filename=attachment_name)
 
-        with smtplib.SMTP(host, port, timeout=30) as s:
-            s.starttls()
-            s.login(user, pwd)
-            s.send_message(msg)
+        # Base64url encode the raw RFC822 message
+        raw = base64.urlsafe_b64encode(msg.as_bytes()).decode("utf-8")
+
+        # Get access token and send
+        access_token = _gmail_access_token()
+        api_url = "https://gmail.googleapis.com/gmail/v1/users/me/messages/send"
+        headers = {"Authorization": f"Bearer {access_token}", "Content-Type": "application/json"}
+        r = requests.post(api_url, headers=headers, json={"raw": raw}, timeout=20)
+
+        if r.status_code >= 400:
+            return f"Gmail API error {r.status_code}: {r.text[:300]}"
         return ""
     except Exception as e:
         return f"Email send failed: {e}"