update bot_core.py for base reaction functionality, create db_helper.py

src/helper/db_helper.py

@@ -0,0 +1,44 @@
+"""
+database interaction module of the very-bad bot
+
+@author: Gabriella 'contrastellar' Agathon
+"""
+
+import psycopg2
+import psycopg2.extensions
+from configparser import ConfigParser
+import datetime
+
+
+def load_config(filename='database.ini', section='postgresql'):
+
+    parser = ConfigParser()
+    parser.read(filename)
+
+    # get section, default is postgresql
+    config = {}
+    if parser.has_section(section):
+        params = parser.items(section)
+        for param in params:
+            config[param[0]] = param[1]
+
+    else:
+        raise Exception('Section {0} not found in the {1} file'.format(section, filename))
+
+    return config
+
+
+def connect_config(config) -> psycopg2.extensions.connection:
+    try:
+        with psycopg2.connect(**config) as conn:
+            print('connected to the server')
+            return conn
+        
+    except (psycopg2.DatabaseError, Exception) as error:
+        print(error)
+
+    finally:
+        if conn is None:
+            raise psycopg2.DatabaseError("Failed to connect!")
+        
+