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"""Custom yaml tag handlers module."""
"""
Copyright 2021 Deutsche Telekom AG
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""
import uuid
from typing import Any
import yaml
from .property_tag.properties_getter import PropertiesGetter
def join(loader: yaml.SafeLoader, node: yaml.Node) -> str:
"""Concatinates the nodes fields for !join tag.
Concatinates multiple strings in yaml value f.e. !join [a, b, c] results in 'abc'.
join supports separator syntax f.e. !join ['_', [a, b, c]] results in 'a_b_c'.
Args:
node (yaml.Node): the yaml node
Returns:
str: the joined string of node
"""
seq = loader.construct_sequence(node, deep=True) # type: ignore
if len(seq) == 2 and isinstance(seq[0], str) and isinstance(seq[1], list):
sep = seq[0]
return sep.join([str(i) for i in seq[1]])
else:
return "".join([str(i) for i in seq])
def generate_random_uuid(*_: Any) -> str:
"""Random UUID generator.
Args:
loader (yaml.SafeLoader): SafeLoader object
node (yaml.Node): Node object
Returns:
str: randomly generated UUID
"""
return str(uuid.uuid4())
def resource_property(loader: yaml.SafeLoader, node: yaml.Node) -> Any:
"""Resource property tag method.
Constructs a scalar from the YAML node and uses `PropertiesGetter`
to get a property value from already existing ONAP resource.
Args:
loader (yaml.SafeLoader): YAML Safe Loader
node (yaml.Node): Node to get values from
Raises:
ValueError: Given property type from the node is not supported by a tag
Returns:
Any: Resource's property value
"""
resource_type, *args = loader.construct_scalar(node).split(" ") # type: ignore
return PropertiesGetter.get_property(resource_type, *args)
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