fix: App crashes on first time sign in (#2055)

Author: liveHarshit

app/src/main/java/org/fossasia/openevent/general/auth/LoginFragment.kt

@@ -196,7 +196,11 @@ class LoginFragment : Fragment() {
             SPEAKERS_CALL_FRAGMENT -> R.id.speakersCallFragment
             else -> R.id.eventsFragment
         }
-        findNavController(rootView).popBackStack(destinationId, false)
+        if (destinationId == R.id.eventsFragment) {
+            findNavController(rootView).navigate(LoginFragmentDirections.actionLoginToEventsPop())
+        } else {
+            findNavController(rootView).popBackStack(destinationId, false)
+        }
         rootView.snackbar(R.string.welcome_back)
     }
 }

app/src/main/java/org/fossasia/openevent/general/auth/SignUpFragment.kt

@@ -202,7 +202,11 @@ class SignUpFragment : Fragment() {
                 SPEAKERS_CALL_FRAGMENT -> R.id.speakersCallFragment
                 else -> R.id.eventsFragment
             }
-        findNavController(rootView).popBackStack(destinationId, false)
+        if (destinationId == R.id.eventsFragment) {
+            findNavController(rootView).navigate(SignUpFragmentDirections.actionSignUpToEventsPop())
+        } else {
+            findNavController(rootView).popBackStack(destinationId, false)
+        }
         rootView.snackbar(R.string.logged_in_automatically)
     }
 

app/src/main/res/navigation/navigation_graph.xml

@@ -756,6 +756,11 @@
             app:destination="@id/authFragment"
             app:popUpTo="@id/authFragment"
             app:popUpToInclusive="true"/>
+        <action
+            android:id="@+id/action_login_to_events_pop"
+            app:destination="@id/eventsFragment"
+            app:popUpTo="@id/eventsFragment"
+            app:popUpToInclusive="true"/>
         <argument
             android:name="email"
             app:argType="string"
@@ -776,6 +781,11 @@
             app:destination="@id/authFragment"
             app:popUpTo="@id/authFragment"
             app:popUpToInclusive="true"/>
+        <action
+            android:id="@+id/action_sign_up_to_events_pop"
+            app:destination="@id/eventsFragment"
+            app:popUpTo="@id/eventsFragment"
+            app:popUpToInclusive="true"/>
         <argument
             android:name="email"
             app:argType="string"