make sure .filter are 0600

.gitignore

@@ -142,8 +142,10 @@ dmypy.json
 cython_debug/
 
 # Project specific
-message.txt
+message*.txt
 config.py
 inventory.txt
 ansible/host_vars/*
+!ansible/host_vars/example.tld.yml
 !.keep
+TODO.md

ansible/host_vars/example.tld.yml

@@ -0,0 +1,10 @@
+---
+auth_user: exampleuser
+auth_pass: changemenow
+domain: autoreply.example.tld
+
+users:
+  - name: Foobar
+    email: foobar@example.com
+  - name: Barbaz
+    email: barbaz@example.net

ansible/inventory.sample.txt

@@ -0,0 +1,2 @@
+[autoreply_editor]
+example.tld

ansible/playbook.yml

@@ -5,17 +5,13 @@
       git:
         repo: https://src.mehl.mx/mxmehl/autoreply-editor.git
         dest: autoreply-editor
+      notify: restart supervisord
 
     - name: Deploy config file
       template:
         src: config.py.j2
         dest: autoreply-editor/config.py
-
-    - name: Create empty message file if it does not exist
-      copy:
-        content: ""
-        dest: "autoreply-editor/{{ message_file }}"
-        force: no
+      notify: restart supervisord
 
     - name: Install specified python requirements
       pip:
@@ -45,12 +41,6 @@
         path: autoresponders
         state: directory
 
-    - name: Create autoreply mailbot filter
-      template:
-        src: filter-autoreply.j2
-        dest: .filter-autoreply
-        mode: 0600
-
   handlers:
     - name: reread supervisord
       command: supervisorctl reread
@@ -58,3 +48,5 @@
     - name: update supervisord
       command: supervisorctl update
       listen: reload supervisord
+    - name: restart supervisord
+      command: supervisorctl restart autoreply-editor

ansible/templates/autoreply-editor.ini.j2

@@ -1,4 +1,4 @@
 [program:autoreply-editor]
 directory=/home/{{ ansible_user_id }}/autoreply-editor
 command=gunicorn --bind 0.0.0.0:{{ port }} wsgi:app
-startsecs=60
+startsecs=5

ansible/templates/config.py.j2

@@ -1,3 +1,7 @@
-MESSAGE_FILE = "{{ message_file }}"
+"""Configuration file"""
+# Username and password for logging in to the site
 BASIC_AUTH_USERNAME = "{{ auth_user }}"
 BASIC_AUTH_PASSWORD = "{{ auth_pass }}"
+
+# List of users. First value is the full name, second the email address
+USERS = [{% for user in users %}("{{ user.name }}", "{{ user.email }}"),{% endfor %}]

ansible/templates/filter-autoreply.j2

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

autoreply_editor/__init__.py

@@ -1,8 +1,9 @@
+"""Initialise flask app"""
 from flask import Flask
 
 app = Flask(__name__)
 
-import autoreply_editor.main
+import autoreply_editor.main  #pylint: disable=wrong-import-position
 
 app.config['BASIC_AUTH_FORCE'] = True
 app.config.from_pyfile("../config.py")

autoreply_editor/main.py

@@ -1,77 +1,200 @@
 """Provide basic settings and views"""
 
 import fileinput
+import os
 import re
+import shutil
 from pathlib import Path
-from flask import request, render_template
+from flask import abort, request, render_template
 from flask_basicauth import BasicAuth
+from jinja2 import Template
 from autoreply_editor import app
 
 basic_auth = BasicAuth(app)
 
-qmail_prefix = f"{str(Path.home())}/.qmail-"
-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(f"{qmail_prefix}{user}", encoding="utf8") as dotqmail:
-        # TODO: RE not necessary here
-        if not re.search(
-            r"^\|maildrop \$HOME/\.filter-autoreply$", dotqmail.read(), re.MULTILINE
+    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(
+            rf"{get_maildropline(user, active=True, regex=True)}",
+            qmailfile.read(),
+            re.MULTILINE,
         ):
-            return False
-        else:
             return True
+        else:
+            # jump back to top of file because we've read it in the "if"
+            qmailfile.seek(0)
+
+            # filter is deactivated (commented)
+            if re.search(
+                rf"{get_maildropline(user, active=False, regex=True)}",
+                qmailfile.read(),
+                re.MULTILINE,
+            ):
+                return False
+            # The maildrop line does not exist in the expected form
+            else:
+                initialise = True
+
+    # Append a commented filter command to the file
+    if initialise:
+        with open(get_qmailfile(user), mode="a", encoding="utf8") as qmailfile:
+            qmailfile.write(f"{get_maildropline(user, active=False)}")
+
+        return False
+
+
+def check_user(user):
+    """Check if user exists"""
+    fulluser = [
+        item for item in app.config.get("USERS") if item[1].split("@")[0] == user
+    ]
+    if not fulluser:
+        return False
+    else:
+        return fulluser[0]
+
+
+def get_messagefile(user):
+    """Return message file of user, and create if necessary"""
+    # Path of the project
+    gitpath = str(Path(app.root_path).parent)
+    # File name of the message
+    filename = f"message-{user}.txt"
+    # Combine path
+    filepath = os.path.join(gitpath, filename)
+
+    if not os.path.isfile(filepath):
+        Path(filepath).touch()
+
+    return filepath
+
+
+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}"
+    if not os.path.isfile(filepath):
+        shutil.copy(f"{qmail_base}-default", filepath)
+
+    return filepath
+
+
+def get_filterfile(user):
+    """Return .filter-autoreply file of user, and create if necessary"""
+    filter_base = f"{str(Path.home())}/.filter-autoreply"
+    filepath = f"{filter_base}-{user}"
+    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=check_user(user)[1],
+                user=user,
+                name=check_user(user)[0],
+                messagefile=get_messagefile(user),
+            )
+
+            with open(filepath, "w", encoding="utf-8") as filterfile:
+                filterfile.write(filterconfig)
+
+            # Change permissions to 0600
+            os.chmod(filepath, 0o600)
+
+    return filepath
+
+
+def get_maildropline(user, active=True, regex=False):
+    """
+    Define the line calling maildrop, with options to have the line disabled or
+    in Regex format
+    """
+    base = f"|maildrop {get_filterfile(user)}"
+    # If the filter should be inactive, we comment it
+    if not active:
+        base = f"#{base}"
+
+    # depending on whether it should be RE escaped or not, return the line
+    if regex:
+        return f"^{re.escape(base)}$"
+    else:
+        return base
 
 
 @app.route("/")
 def index():
-    with open(app.config.get("MESSAGE_FILE"), "r", encoding="utf-8") as messagefile:
-        message = messagefile.read()
-
+    """Index page listing available users"""
     return render_template(
         "index.html",
-        message=message,
-        qmail_status=qmail_status(app.config.get("MAIL_USER")),
+        users=app.config.get("USERS"),
     )
 
 
-@app.route("/", methods=["POST"])
-def index_post():
-    if request.method == "POST":
-        if request.form["action"] == "message":
-            input_message = request.form["message"]
-            with open(
-                app.config.get("MESSAGE_FILE"), "w", encoding="utf-8"
-            ) as messagefile:
-                messagefile.write(str(input_message))
-                result = "Success: The autoreply message has been updated!"
+@app.route("/user/<user>")
+def user_status(user):
+    """Status for specific user"""
+    # Check if user is valid
+    if not check_user(user):
+        abort(404)
 
-        if request.form["action"] == "qmail":
-            # define whether to set a comment
-            if request.form["status"] == "on":
-                preis = "#"
-                preshould = ""
-            else:
-                preis = ""
-                preshould = "#"
+    with open(get_messagefile(user), "r", encoding="utf-8") as messagefile:
+        message = messagefile.read()
 
-            with fileinput.FileInput(
-                f"{qmail_prefix}{app.config.get('MAIL_USER')}",
-                inplace=True,
-                backup=".bak",
-            ) as dotqmail:
-                for line in dotqmail:
-                    print(
-                        line.replace(
-                            f"{preis}{maildrop_line}", f"{preshould}{maildrop_line}"
-                        ),
-                        end="",
-                    )
+    return render_template(
+        "user.html",
+        message=message,
+        qmail_status=qmail_status(user),
+    )
 
-            result = f"Success: the autoreply is now {request.form['status']}."
+
+@app.route("/user/<user>", methods=["POST"])
+def user_update(user):
+    """Update user with POST request"""
+    # Check if user is valid
+    if not check_user(user):
+        abort(404)
+
+    if request.form["action"] == "message":
+        input_message = request.form["message"]
+        with open(get_messagefile(user), "w", encoding="utf-8") as messagefile:
+            messagefile.write(str(input_message))
+            result = "Success: The autoreply message has been updated!"
+
+    if request.form["action"] == "qmail":
+        # define whether to set a comment
+        if request.form["status"] == "on":
+            state_current = get_maildropline(user, active=False)
+            state_desired = get_maildropline(user)
+        else:
+            state_current = get_maildropline(user)
+            state_desired = get_maildropline(user, active=False)
+
+        with fileinput.FileInput(
+            get_qmailfile(user),
+            inplace=True,
+        ) as qmailfile:
+            for line in qmailfile:
+                print(
+                    line.replace(state_current, state_desired),
+                    end="",
+                )
+
+        result = f"Success: the autoreply is now {request.form['status']}."
 
     try:
-        return render_template("result.html", result=result)
+        return render_template("update.html", user=user, result=result)
     except UnboundLocalError:
-        return render_template("result.html", result="Something went terribly wrong!")
+        return render_template(
+            "update.html", user=user, result="Something went terribly wrong!"
+        )
+
+
+@app.errorhandler(404)
+def page_not_found(error):
+    """Error for 404"""
+    return render_template("error.html", error=error), 404

autoreply_editor/templates/error.html

@@ -6,7 +6,7 @@
 <body>
   <h1>Autoreply Editor</h1>
 
-  <p>{{ result }}</p>
+  <p>{{ error }}</p>
 
   <p><a href="/">Go back</a></p>
 

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 ''"

autoreply_editor/templates/index.html

@@ -6,33 +6,13 @@
 <body>
   <h1>Autoreply Editor</h1>
 
-  <h2>Toggle autoreply message</h2>
+  <h2>Configurable users</h2>
 
-  <p>
-    The autoreply is <strong>{%if qmail_status%}active{%else%}inactive{%endif%}</strong>
-  </p>
-  <form method="POST">
-    <input type="hidden" name="action" value="qmail" />
-    {% if qmail_status %}
-    <input type="hidden" name="status" value="off" />
-    <input type="submit" value="Deactivate">
-    {% else %}
-    <input type="hidden" name="status" value="on" />
-    <input type="submit" value="Activate">
-    {% endif %}
-  </form>
+  <ul>
+    {% for user in users %}
+    <li><a href="/user/{{ user[1].split('@')[0] }}">{{ user[0] }} {{"<"}}{{ user[1] }}{{">"}}</a></li>
+    {% endfor %}
+  </ul>
 
-  <h2>Change autoreply message</h2>
-
-  <p>
-    Below you can see the current text of your autoreply message. You
-    can edit and update it directly below:
-  </p>
-  <form method="POST">
-    <input type="hidden" name="action" value="message" />
-    <textarea name="message" cols="120" rows="20">{{ message }}</textarea>
-    <br />
-    <input type="submit" value="Update">
-  </form>
 </body>
 </html>

autoreply_editor/templates/update.html

@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<head>
+  <title>Autoreply Editor</title>
+</head>
+
+<body>
+  <h1>Autoreply Editor</h1>
+
+  <p>{{ result }}</p>
+
+  <p><a href="/user/{{ user }}">Go back</a></p>
+
+</body>
+</html>

autoreply_editor/templates/user.html

@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<head>
+  <title>Autoreply Editor</title>
+</head>
+
+<body>
+  <h1>Autoreply Editor</h1>
+
+  <p>
+    <a href="/">↩ Back to user overview</a>
+  </p>
+
+  <h2>Toggle autoreply message</h2>
+
+  <p>
+    The autoreply is <strong>{%if qmail_status%}active{%else%}inactive{%endif%}</strong>
+  </p>
+  <form method="POST">
+    <input type="hidden" name="action" value="qmail" />
+    {% if qmail_status %}
+    <input type="hidden" name="status" value="off" />
+    <input type="submit" value="Deactivate">
+    {% else %}
+    <input type="hidden" name="status" value="on" />
+    <input type="submit" value="Activate">
+    {% endif %}
+  </form>
+
+  <h2>Change autoreply message</h2>
+
+  <p>
+    Below you can see the current text of your autoreply message. You
+    can edit and update it directly below:
+  </p>
+  <form method="POST">
+    <input type="hidden" name="action" value="message" />
+    <textarea name="message" cols="120" rows="20">{{ message }}</textarea>
+    <br />
+    <input type="submit" value="Update">
+  </form>
+</body>
+</html>

config.sample.py

@@ -1,6 +1,11 @@
 """Configuration file"""
 
-MESSAGE_FILE = "message.txt"
-BASIC_AUTH_FORCE = True
+# Username and password for logging in to the site
 BASIC_AUTH_USERNAME = "username"
 BASIC_AUTH_PASSWORD = "password"
+
+# List of users. First value is the full name, second the email address
+USERS = [
+    ("Foobar", "foobar@example.com"),
+    ("Barbaz", "baz@example.net")
+  ]

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

wsgi.py

@@ -1,3 +1,4 @@
+"""WSGI for Flask app"""
 from autoreply_editor import app
 
 if __name__ == "__main__":