Clean up some of the execution of the module (#48391)

- Module now checks whether a specified network is valid very early
- Simplifies the present code flow
- No functionality enhancement

lib/ansible/modules/network/meraki/meraki_network.py

@@ -237,6 +237,14 @@ def main():
         org_id = meraki.get_org_id(meraki.params['org_name'])
     nets = meraki.get_nets(org_id=org_id)
 
+    # check if network is created
+    net_id = None
+    if meraki.params['net_name']:
+        if is_net_valid(meraki, meraki.params['net_name'], nets) is True:
+            net_id = meraki.get_net_id(net_name=meraki.params['net_name'], data=nets)
+    elif meraki.params['net_id']:
+        net_id = meraki.params['net_id']
+
     if meraki.params['state'] == 'query':
         if not meraki.params['net_name'] and not meraki.params['net_id']:
             meraki.result['data'] = nets
@@ -246,8 +254,7 @@ def main():
                                                    data=nets
                                                    )
     elif meraki.params['state'] == 'present':
-        if meraki.params['net_name']:  # FIXME: Idempotency check is ugly here, improve
+        if net_id is None:
-            if is_net_valid(meraki, meraki.params['net_name'], nets) is False:
             path = meraki.construct_path('create',
                                          org_id=org_id
                                          )