introduce basic config file

chatmaild/src/chatmaild/config.py

@@ -0,0 +1,26 @@
+
+from fnmatch import fnmatch
+import iniconfig
+
+
+class Config:
+    def __init__(self, mailname, section):
+        self.mailname = mailname
+        self.privacy_postal = section.get("privacy_postal")
+        self.privacy_mail = section.get("privacy_mail")
+        self.privacy_pdo = section.get("privacy_pdo")
+        self.privacy_supervisor = section.get("privacy_supervisor")
+        self.has_privacy_policy = self.privacy_mail != None
+
+
+def read_config(inipath, mailname):
+    ini = iniconfig.IniConfig(inipath)
+    privacy = None
+    for section in ini:
+        if section.name.startswith("privacy:"):
+            domain = section["domain"]
+            if fnmatch(mailname, domain):
+                privacy = section
+                break
+
+    return Config(mailname, privacy or {})