begin cli work

cli/hv2cli.py

@@ -0,0 +1,62 @@
+import psycopg2
+import psycopg2.extras
+from loguru import logger
+import os
+import configparser
+import json
+import argparse
+import importlib
+
+
+DB_USER = ""
+DB_PASS = ""
+DB_HOST = ""
+DB_NAME = ""
+try:
+    DB_USER = os.environ["DB_USER"]
+    DB_PASS = os.environ["DB_PASS"]
+    DB_HOST = os.environ["DB_HOST"]
+    DB_NAME = os.environ["DB_NAME"]
+except KeyError:
+    config = configparser.ConfigParser()
+    config.read('./config/dbconfig.ini')
+    DB_USER = config["database"]["user"]
+    DB_PASS = config["database"]["pass"]
+    DB_HOST = config["database"]["host"]
+    DB_NAME = config["database"]["name"]
+
+
+parser = argparse.ArgumentParser(description="hv2cli.py")
+parser.add_argument('--operation', '-o',
+                    help='Operation to perform.',
+                    required=True)
+parser.add_argument('--params', '-p',
+                    help='JSON string with parameter for the selected operation, default: {}',                    
+                    required=False,
+                    default="{}")
+args = parser.parse_args()
+operation = args.operation
+params = json.loads(args.params)
+
+
+
+
+try:
+    opMod = importlib.import_module(operation)
+
+    dbh = psycopg2.connect(user = DB_USER, password = DB_PASS,
+                           host = DB_HOST, database = DB_NAME,
+                           sslmode = 'require')
+    dbh.autocommit = False
+
+    with dbh:
+        opMod.perform(dbh, params)
+except psycopg2.Error as err:
+    raise Exception("Error when working on the database: {}".format(err))
+except Exception as err:
+    raise err
+finally:
+    if dbh:
+        dbh.close()
+
+