X-Git-Url: https://osm.etsi.org/gitweb/?p=osm%2FN2VC.git;a=blobdiff_plain;f=n2vc%2Futils.py;h=286f0fc05b135e7be53402b5472523b66d908d70;hp=e8cf64dac123207f6023ca18ac035ebe9f1840e0;hb=0ebadd80cf20e478677b1af7b57a3faaefcc239a;hpb=c38a696d168531e3c067451044262ef4d78ef11f

diff --git a/n2vc/utils.py b/n2vc/utils.py
index e8cf64d..286f0fc 100644
--- a/n2vc/utils.py
+++ b/n2vc/utils.py
@@ -12,11 +12,39 @@
 #     See the License for the specific language governing permissions and
 #     limitations under the License.
 
+import base64
+import re
+import binascii
+import yaml
+import string
+import secrets
 from enum import Enum
 from juju.machine import Machine
 from juju.application import Application
 from juju.action import Action
 from juju.unit import Unit
+from n2vc.exceptions import N2VCInvalidCertificate
+from typing import Tuple
+
+
+def base64_to_cacert(b64string):
+    """Convert the base64-encoded string containing the VCA CACERT.
+
+    The input string....
+
+    """
+    try:
+        cacert = base64.b64decode(b64string).decode("utf-8")
+
+        cacert = re.sub(
+            r"\\n",
+            r"\n",
+            cacert,
+        )
+    except binascii.Error as e:
+        raise N2VCInvalidCertificate(message="Invalid CA Certificate: {}".format(e))
+
+    return cacert
 
 
 class N2VCDeploymentStatus(Enum):
@@ -93,10 +121,59 @@ JujuStatusToOSM = {
     },
 }
 
-DB_DATA = Dict(
-    {
-        "api_endpoints": Dict(
-            {"table": "admin", "filter": {"_id": "juju"}, "key": "api_endpoints"}
-        )
-    }
-)
+
+def obj_to_yaml(obj: object) -> str:
+    """
+    Converts object to yaml format
+    :return: yaml data
+    """
+    # dump to yaml
+    dump_text = yaml.dump(obj, default_flow_style=False, indent=2)
+    # split lines
+    lines = dump_text.splitlines()
+    # remove !!python/object tags
+    yaml_text = ""
+    for line in lines:
+        index = line.find("!!python/object")
+        if index >= 0:
+            line = line[:index]
+        yaml_text += line + "\n"
+    return yaml_text
+
+
+def obj_to_dict(obj: object) -> dict:
+    """
+    Converts object to dictionary format
+    :return: dict data
+    """
+    # convert obj to yaml
+    yaml_text = obj_to_yaml(obj)
+    # parse to dict
+    return yaml.load(yaml_text, Loader=yaml.Loader)
+
+
+def get_ee_id_components(ee_id: str) -> Tuple[str, str, str]:
+    """
+    Get model, application and machine components from an execution environment id
+    :param ee_id:
+    :return: model_name, application_name, machine_id
+    """
+    parts = ee_id.split(".")
+    if len(parts) != 3:
+        raise Exception("invalid ee id.")
+    model_name = parts[0]
+    application_name = parts[1]
+    machine_id = parts[2]
+    return model_name, application_name, machine_id
+
+
+def generate_random_alfanum_string(size: int) -> str:
+    """
+    Generate random alfa-numeric string with a size given by argument
+    :param size:
+    :return: random generated string
+    """
+
+    return "".join(
+        secrets.choice(string.ascii_letters + string.digits) for i in range(size)
+    )