Added environment as flag for list_containerapp. (Azure#114)

* Added environment as flag for list_containerapp.

* Fixed logic error in RID case.

* Check if rg exists.

* Validate managed env exists if group is passed or rid is passed.

Co-authored-by: Haroon Feisal <haroonfeisal@microsoft.com>

src/containerapp/azext_containerapp/custom.py

@@ -62,7 +62,7 @@
                      _update_revision_env_secretrefs, _get_acr_cred, safe_get, await_github_action, repo_url_to_name,
                      validate_container_app_name, _update_weights, get_vnet_location, register_provider_if_needed,
                      generate_randomized_cert_name, _get_name, load_cert_file, check_cert_name_availability,
-                     validate_hostname, patch_new_custom_domain, get_custom_domains)
+                     validate_hostname, patch_new_custom_domain, get_custom_domains, get_resource_group)
 
 from ._ssh_utils import (SSH_DEFAULT_ENCODING, WebSocketConnection, read_ssh, get_stdin_writer, SSH_CTRL_C_MSG,
                          SSH_BACKUP_ENCODING)
@@ -724,7 +724,7 @@ def show_containerapp(cmd, name, resource_group_name):
         handle_raw_exception(e)
 
 
-def list_containerapp(cmd, resource_group_name=None):
+def list_containerapp(cmd, resource_group_name=None, managed_env=None):
     _validate_subscription_registered(cmd, CONTAINER_APPS_RP)
 
     try:
@@ -734,6 +734,14 @@ def list_containerapp(cmd, resource_group_name=None):
         else:
             containerapps = ContainerAppClient.list_by_resource_group(cmd=cmd, resource_group_name=resource_group_name)
 
+        if managed_env:
+            env_name = parse_resource_id(managed_env)["name"].lower()
+            if "resource_group" in parse_resource_id(managed_env):
+                ManagedEnvironmentClient.show(cmd, parse_resource_id(managed_env)["resource_group"], parse_resource_id(managed_env)["name"])
+                containerapps = [c for c in containerapps if c["properties"]["managedEnvironmentId"].lower() == managed_env.lower()]
+            else:
+                containerapps = [c for c in containerapps if parse_resource_id(c["properties"]["managedEnvironmentId"])["name"].lower() == env_name]
+
         return containerapps
     except CLIError as e:
         handle_raw_exception(e)