core: configuration loading and logging function

.gitignore

@@ -1,7 +1,7 @@
-config.py
+config.json
 __pycache__/**
 __pycache__
 backup/*
 logs/*
 data/*
-backup/**Ã
+backup/**�

config-example.json

@@ -0,0 +1,5 @@
+{
+  "username": "",
+  "password": "",
+  "loglevel": 2
+}

config.py

@@ -0,0 +1,26 @@
+#!/usr/bin/python3
+
+import json
+
+################## config.py ###################
+## loads configuration data from config.json  ##
+## by Annika                                  ##
+################################################
+
+CONFIG_PATH = 'config.json'
+CONFIG_VARS = ['username', 'password', 'loglevel']
+
+def loadConfig():
+    configData = json.load(open(CONFIG_PATH, 'r'))
+    returnValue = []
+    # make sure we're not missing anything
+    for configItem in CONFIG_VARS:
+        if configItem not in configData:
+            # We can't use core.log because config.loglevel doesn't exist yet
+            print("E: {item} not found in config.json".format(item = configItem))
+        else:
+            returnValue.append(configData[configItem])
+    return returnValue
+
+username, password, loglevel = loadConfig()
+# the order of these needs to be the same as in CONFIG_VARS

core.py

@@ -0,0 +1,21 @@
+#!/usr/bin/python3
+
+import config
+
+################## core.py #####################
+## core functionality of Expecto Botronum     ##
+## by Annika                                  ##
+################################################
+
+######################
+## Helper Functions ##
+######################
+
+def log(message):
+    if config.loglevel > 2 or message[:2] == 'E:':
+        # Errors are always logged and everything in debug mode is logged.
+        print(message)
+    elif message[:2] == 'W:' and config.loglevel >= 1:
+        print(message)
+    elif message[:2] == 'I:' and config.loglevel >= 2:
+        print(message)