create .filter file from template, and make maildrop command in .qmail variable depending on user

.gitignore

@@ -147,3 +147,4 @@ config.py
 inventory.txt
 ansible/host_vars/*
 !.keep
+TODO.md

autoreply_editor/main.py

@@ -7,23 +7,23 @@ import shutil
 from pathlib import Path
 from flask import request, render_template
 from flask_basicauth import BasicAuth
+from jinja2 import Template
 from autoreply_editor import app
 
 basic_auth = BasicAuth(app)
 
-maildrop_line = "|maildrop $HOME/.filter-autoreply"
-
-
 def qmail_status(user):
     """Find out whether the filter is currently activated for the given mail user"""
-    with open(get_qmailfile(app.config.get("MAIL_USER")), encoding="utf8") as qmailfile:
+    with open(get_qmailfile(user), encoding="utf8") as qmailfile:
         # trigger to check whether we have to re-open the file for initialisation
         initialise = False
 
+
         # try to find active filter
         if re.search(
-            r"^\|maildrop \$HOME/\.filter-autoreply$", qmailfile.read(), re.MULTILINE
+            rf"^{re.escape(get_maildropline(user))}$", qmailfile.read(), re.MULTILINE
         ):
+        # if get_maildropline(user) in qmailfile.read():
             return True
         else:
             # jump back to top of file because we've read it in the "if"
@@ -31,10 +31,11 @@ def qmail_status(user):
 
             # filter is deactivated (commented)
             if re.search(
-                r"^#\|maildrop \$HOME/\.filter-autoreply$",
+                rf"^#{re.escape(get_maildropline(user))}$",
                 qmailfile.read(),
                 re.MULTILINE,
             ):
+            # if f"#{get_maildropline(user)}" in qmailfile.read():
                 return False
             else:
                 initialise = True
@@ -42,16 +43,16 @@ def qmail_status(user):
     # Append a commented filter command to the file
     if initialise:
         with open(
-            get_qmailfile(app.config.get("MAIL_USER")), mode="a", encoding="utf8"
+            get_qmailfile(user), mode="a", encoding="utf8"
         ) as qmailfile:
-            qmailfile.write("#|maildrop $HOME/.filter-autoreply")
+            qmailfile.write(f"#{get_maildropline(user)}")
 
         return False
 
 
 def get_messagefile(user):
     """Return message file of user, and create if necessary"""
-    filepath = f"message-{user}.txt"
+    filepath = f"message-{user.split('@')[0]}.txt"
     if not os.path.isfile(filepath):
         Path(filepath).touch()
 
@@ -61,16 +62,39 @@ def get_messagefile(user):
 def get_qmailfile(user):
     """Return qmail file of user, and create if necessary based on default qmail"""
     qmail_base = f"{str(Path.home())}/.qmail"
-    filepath = f"{qmail_base}-{user}"
+    filepath = f"{qmail_base}-{user.split('@')[0]}"
     if not os.path.isfile(filepath):
         shutil.copy(f"{qmail_base}-default", filepath)
 
     return filepath
 
 
+def get_filterfile(user, name):
+    """Return .filter-autoreply file of user, and create if necessary"""
+    filter_base = f"{str(Path.home())}/.filter-autoreply"
+    filepath = f"{filter_base}-{user.split('@')[0]}"
+    if not os.path.isfile(filepath):
+        with open(os.path.join(app.root_path, "templates/filterfile.j2"), encoding="utf-8") as template:
+            filterconfig = Template(template.read()).render(
+                email=user,
+                user=user.split('@')[0],
+                name=name,
+                messagefile=get_messagefile(user)
+            )
+
+            with open(filepath, "w", encoding="utf-8") as filterfile:
+                filterfile.write(filterconfig)
+
+    return filepath
+
+
+def get_maildropline(user):
+    return f"|maildrop {get_filterfile(user, 'FOOBAR')}"
+
+
 @app.route("/")
 def index():
-    with open(get_messagefile("user"), "r", encoding="utf-8") as messagefile:
+    with open(get_messagefile(app.config.get("MAIL_USER")), "r", encoding="utf-8") as messagefile:
         message = messagefile.read()
 
     return render_template(
@@ -85,7 +109,7 @@ def index_post():
     if request.method == "POST":
         if request.form["action"] == "message":
             input_message = request.form["message"]
-            with open(get_messagefile("user"), "w", encoding="utf-8") as messagefile:
+            with open(get_messagefile(app.config.get("MAIL_USER")), "w", encoding="utf-8") as messagefile:
                 messagefile.write(str(input_message))
                 result = "Success: The autoreply message has been updated!"
 
@@ -106,7 +130,7 @@ def index_post():
                 for line in qmailfile:
                     print(
                         line.replace(
-                            f"{preis}{maildrop_line}", f"{preshould}{maildrop_line}"
+                            f"{preis}{get_maildropline(app.config.get('MAIL_USER'))}", f"{preshould}{get_maildropline(app.config.get('MAIL_USER'))}"
                         ),
                         end="",
                     )

autoreply_editor/templates/filterfile.j2

@@ -0,0 +1,5 @@
+logfile "$HOME/mailfilter-autoreply-{{ user }}.log"
+
+FROM="{{ name }} <{{ email }}>"
+
+to "| mailbot -T reply -t {{ messagefile }} -d $HOME/autoresponders/autoresponsedb-{{ user }} -N -A 'From: $FROM' /var/qmail/bin/qmail-inject -f ''"

message.txt.sample

@@ -1,6 +0,0 @@
-Hello,
-
-This is my autoreply message.
-
-Best,
-Me

requirements.txt

@@ -1,3 +1,4 @@
 Flask
 Flask-BasicAuth
 gunicorn
+jinja2