fix: stacking of browser sessions and refactor login logic to decrease waiting time

bank_integration/bank_integration/api/bank_api.py

@@ -52,12 +52,14 @@ def __init__(
 
         if getattr(self, "init"):
             self.init()
-
-        if resume:
-            self.resume_session()
-        else:
-            self.login()
-
+        try:
+            if resume:
+                self.resume_session()
+            else:
+                self.login()
+        except Exception as e:
+            self.throw("Closing browser session. Unexpected error occurred: {}".format(str(e)))
+
     def login(self):
         pass
 
@@ -306,6 +308,30 @@ def cleanup_download_dir(self, delete_dir=False):
                 )
 
 
+class ElementVisibleByJS:
+    """
+    Custom EC that checks actual rendered size via getBoundingClientRect()
+    instead of Selenium's is_displayed(), which can fail for Angular components
+    that use CSS opacity/transforms to show/hide elements that stay in the DOM.
+    Has a .locator attribute so AnyEC._found_element tracking works correctly.
+    """
+
+    def __init__(self, by, value):
+        self.locator = (by, value)
+
+    def __call__(self, driver):
+        els = driver.find_elements(*self.locator)
+        if not els:
+            return False
+        visible = [
+            e
+            for e in els
+            if driver.execute_script(
+                "var r=arguments[0].getBoundingClientRect(); return r.width>0 && r.height>0;",
+                e,
+            )
+        ]
+        return visible[0] if visible else False
 class AnyEC:
     """Use with WebDriverWait to combine expected_conditions
     in an OR.

bank_integration/bank_integration/api/hdfc_bank_api.py

@@ -9,7 +9,11 @@
 from frappe.utils import getdate, today, add_months, add_days, flt
 from frappe.utils.file_manager import save_file
 
-from bank_integration.bank_integration.api.bank_api import BankAPI, AnyEC
+from bank_integration.bank_integration.api.bank_api import (
+    BankAPI,
+    AnyEC,
+    ElementVisibleByJS,
+)
 
 # Selenium imports
 from selenium.webdriver.support import expected_conditions as EC
@@ -75,7 +79,7 @@ def _handle_post_login_state(self):
                         )
                     ),
                     EC.visibility_of_element_located((By.ID, "proceedBtn")),
-                    EC.visibility_of_element_located((By.ID, "mfa-get-otp-btn")),
+                    ElementVisibleByJS(By.ID, "mfa-get-otp-btn"),
                     EC.presence_of_element_located((By.TAG_NAME, "bb-retail-layout")),
                     EC.visibility_of_element_located((By.NAME, "fldOldPass")),
                     EC.visibility_of_element_located((By.NAME, "fldAnswer")),
@@ -144,9 +148,12 @@ def _handle_post_login_state(self):
                 self.handle_login_error()
                 return
 
-        self.handle_login_error()
 
     def process_otp(self):
+        # here it again checks for the otp button in AnyEC because process_otp is used in two flows 
+        # - login flow 
+        # - payment flow
+        # both have different GET OTP button elements present
         try:
             self.wait_until(
                 AnyEC(