1 files changed, 52 insertions, 0 deletions
diff --git a/onap_data_provider/tag_handlers.py b/onap_data_provider/tag_handlers.py
new file mode 100644
index 0000000..8f29d0d
--- /dev/null
+++ b/onap_data_provider/tag_handlers.py
@@ -0,0 +1,52 @@
+"""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 yaml
+import uuid
+
+
+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(*_) -> str:
+    """Random UUID generator.
+
+    Args:
+        loader (yaml.SafeLoader): SafeLoader object
+        node (yaml.Node): Node object
+
+    Returns:
+        str: randomly generated UUID
+    """
+    return str(uuid.uuid4())