{RDBMS} az postgres flexible-server backup create: add backup name validator

Author: Matthew Boentoro

src/azure-cli/azure/cli/command_modules/rdbms/flexible_server_custom_postgres.py

@@ -36,7 +36,7 @@
 from .flexible_server_virtual_network import prepare_private_network, prepare_private_dns_zone, prepare_public_network
 from .validators import pg_arguments_validator, validate_server_name, validate_and_format_restore_point_in_time, \
     validate_postgres_replica, validate_georestore_network, pg_byok_validator, validate_migration_runtime_server, \
-    validate_resource_group, check_resource_group, validate_citus_cluster, cluster_byok_validator
+    validate_resource_group, check_resource_group, validate_citus_cluster, cluster_byok_validator, validate_backup_name
 
 logger = get_logger(__name__)
 DEFAULT_DB_NAME = 'flexibleserverdb'
@@ -1422,6 +1422,7 @@ def virtual_endpoint_update_func(cmd, client, resource_group_name, server_name,
 
 def backup_create_func(client, resource_group_name, server_name, backup_name):
     validate_resource_group(resource_group_name)
+    validate_backup_name(backup_name)
 
     return client.begin_create(
         resource_group_name,

src/azure-cli/azure/cli/command_modules/rdbms/validators.py

@@ -915,3 +915,21 @@ def check_resource_group(resource_group_name):
 def validate_resource_group(resource_group_name):
     if not check_resource_group(resource_group_name):
         raise CLIError('Resource group name cannot be empty.')
+
+
+def validate_backup_name(backup_name):
+    # check if backup_name is already null originally
+    if not backup_name:
+        raise CLIError('Backup name cannot be empty.')
+
+    # replace single and double quotes with empty string
+    backup_name = backup_name.replace("'", '')
+    backup_name = backup_name.replace('"', '')
+
+    # check if backup_name is empty or contains only whitespace after removing the quote
+    if not backup_name or backup_name.isspace():
+        raise CLIError('Backup name cannot be empty or contain only whitespaces.')
+
+    # check if backup_name exceeds 128 characters
+    if len(backup_name) > 128:
+        raise CLIError('Backup name cannot exceed 128 characters.')