utilize /etc/ directory

+ add config.py to read / touch create the etc config file

1 files changed, 66 insertions, 0 deletions

diff --git a/config.py b/config.py
new file mode 100644
index 0000000..55b7639
--- /dev/null
+++ b/config.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+import json
+import sys
+from pathlib import Path
+
+
+class Config:
+    def __init__(self):
+        # global config path
+        conf_path = '/etc/ejabberd-metrics.conf'
+        self.file = Path(conf_path)
+        self.content = None
+
+        # read config file
+        self._read()
+
+    def _read(self):
+        """init the config object with this method"""
+        self._check()
+
+        # open and load json content from config
+        with open(self.file, 'r', encoding='utf-8') as f:
+            try:
+                self.content = json.load(f)
+
+            # catch json decoding errors
+            except json.JSONDecodeError as err:
+                print(err, file=sys.stderr)
+                exit(1)
+
+    def _check(self):
+        """internal method to check if the config file exists"""
+        try:
+            # if file is present try to read it's contents
+            if self.file.exists():
+                return
+
+            # if not create a blank file
+            else:
+                Path.touch(self.file)
+
+        # catch permission exceptions as this tries to write to /etc/
+        except PermissionError as err:
+            print(err, file=sys.stderr)
+            sys.exit(err.errno)
+
+    def get(self, key: str = None, default: (str, int) = None) -> (dict, str, int, None):
+        """method to retrieve the whole config data, a single value or the optional default value"""
+        # if a special key is request, return only that value
+        if key is not None:
+
+            # safety measure
+            if key in self.content:
+                return self.content[key]
+
+            # if a default value is given return that
+            if default is not None:
+                return default
+
+            # if the key isn't part if self.content return None
+            else:
+                return None
+
+        # else return everything
+        return self.content