Added installation files

This commit adds a convenient installation script for Linux and also
adds a description on how to install the bot.

Furthermore, a very simple example plugin is added. This way, new users
can easily discover the possibilities of this plugin.

Finally, the default character "Peter"---which is used within
Alcuinus---is removed, and a more generic character is added.

README.md

@@ -1,33 +1,72 @@
 The core of this chatbot is based on [github.com/shawnanastasio/python-matrix-bot-api](https://github.com/shawnanastasio/python-matrix-bot-api/) which was published under GPL-3.0. It is heavily modified to create an API to easily add plugins. This bot is intended to operate on the [Matrix network](https://matrix.org).
 
-This code has two purposes. Firstly, and mainly, it serves as virtual assistent in the Matrix based communication platform of members of the Dutch student association [Alcuinus](https://alcuinus.nl). Secondly, the bot's easy to use API makes the development of a simple plugin an approachable first project for new members of Alcuinus' IT working groups during their training.
+This bot was orginally created to serve two purposes. Firstly, and mainly, it serves as virtual assistent in the Matrix based communication platform of members of the Dutch student association [Alcuinus](https://alcuinus.nl). Secondly, the bot's easy to use API makes the development of a simple plugin an approachable first project for new members of Alcuinus' IT working groups during their training.
 
 ## Content
 * [Installation & Requirements](#installation-requirements)
+    * [Automatic installation (Linux)](#automatic-installation-linux)
+    * [Manual installation](#manual-installation)
 * [Plugins](#plugins)
     * [List of available plugins](#list-of-available-plugins)
     * [API](#api)
-        * [Mandatory files](#mandatory-files)
+        * [Mandatory/recommended files](#mandatory-recommended-files)
         * [Help template](#help-template)
         * [Plugin class template](#plugin-class-template)
         * [Additional tips](#additional-tips)
 
 ## Installation & Requirements:
-...
+First, clone this repository:
+```
+git clone https://git.dennispotter.eu/Dennis/matrix-chatbot
+```
+In order for the bot framework to work, Python 3, [virtualenv](https://virtualenv.pypa.io/en/latest/), and [pip](https://pypi.org/project/pip/) must be installed on your computer or server.
+
+### Automatic installation (Linux)
+On Linux, the bash script `install.sh` can be used to install the bot.
+```
+install.sh        : Creates a virtualenv, an initial config.json, and installs
+                    all required packages
+install.sh service: Runs ./install and additionally adds a systemd service.
+                    This command will ask you for root credentials!
+install.sh help   : Prints this message.
+```
+### Manual installation
+Create a virtual environment by entering the directory and running:
+```
+virtualenv .
+```
+Enter the virtual environment
+```
+source bin/activate
+```
+and install all required packages
+```
+pip3 install -r requirements.txt
+```
+Now, you need to create a configuration file `config.json`. The template `config.json.template` can be used for this purpose.
+
+Finally, the bot can be started by executing the following command within the virtual environment:
+
+```
+./run.py
+```
 
 ## Plugins
 The bot has different plugins that can be activated by sending `[Keyword in bot's config.json] [Keyword(s) in plugin's config.json]` to a room in which the bot is present. Below, under [List of available plugins](list-of-available-plugins), you can first find a list of already available plugins. Then, under [API](#api), you can find a description on how to develop a new plugin.
 
 ### List of available plugins:
-* [Admidio events plugin](src/branch/master/plugins/events)
+* [Hello plugin](src/branch/master/plugins/events): An example plugin that interacts with users that send "Hello bot" to the bot.
+* [Admidio events plugin](src/branch/master/plugins/events): a plugin that interacts with an [Admidio](https://admidio.org) installation.
 
 ### API
 To interact with rooms, the [Matrix Python SDK](http://matrix-org.github.io/matrix-python-sdk/<Paste>) can be used.
 
-#### Mandatory files
-To create a plugin, a few mandatory files must be present. The tree below shows the general structure of a plugin. A new plugin must be placed in a directory with the same name. The main class (more on that later) of the plugin must be defined in a Python file with the same name within that directory. The event may not use bot's main configuration file. All configuration must be placed in a separate `config.json`.
+#### Mandatory/recommended files
+To create a plugin, a few mandatory or recommended files must be present. The tree below shows the general structure of a plugin. A new plugin must be placed in a directory with the same name. The main class (more on that later) of the plugin must be defined in a Python file with the same name within that directory. The event may not use bot's main configuration file. All configuration must be placed in a separate `config.json`.
 
-A subdirectory `messages` is used to store messages. Within this directory, a file `help` must be present. The content of this file must be returned with a method of the plugin class (more on that later). Furthermore, for every language a file `messages.<language>.json` with all messages should exist.
+A subdirectory `messages` is used to store messages. Within this directory, a file `help` may be present. The content of this file must be returned with a method of the plugin class (more on that later). Furthermore, for every language a file `messages.<language>.json` with all messages should exist.
+
+The help file is not mandatory. If no help message for a plugin should appear when sending a help request to the bot, this file can be ommitted. The Plugin's `help()` method should return 0 in that case.
 ```
 .
 └── plugins

config.json.example

@@ -1,17 +0,0 @@
-{
-    "bot_credentials": {
-        "username": "",
-        "password": "",
-        "server": ""
-    },
-
-    "character": {
-        "name": "Peter",
-        "avatar": "images/profilepic.jpg",
-        "avatar_mime": "image/jpeg"
-    },
-
-    "plugins": [
-        "events"
-    ]
-}

config.json.template

@@ -0,0 +1,17 @@
+{
+    "bot_credentials": {
+        "username": "${uservar}",
+        "password": "${passvar}",
+        "server": "${servervar}"
+    },
+
+    "character": {
+        "name": "Bot",
+        "avatar": "images/default_avatar.png",
+        "avatar_mime": "image/png"
+    },
+
+    "plugins": [
+        "hello"
+    ]
+}

install.sh

@@ -0,0 +1,128 @@
+#!/bin/bash
+#
+# Installation script for matrix-chatbot
+#
+# @author Dennis Potter <dennis@dennispotter.eu>
+# @copyright 2019, Dennis Potter
+# @license GNU General Public License (version 3)
+#
+# matrix-chatbot
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##################################################################################
+
+# This script does the following:
+#   - create virtualenv
+#   - install requirements of main bot
+#   - create initial config.json
+#   - (optional) create systemd service
+
+if [[ $1 == help ]]; then
+    echo "Help:"
+    echo "install.sh        : Creates a virtualenv, an initial config.json, and installs"
+    echo "                    all required packages"
+    echo "install.sh service: Runs ./install and additionally adds a systemd service."
+    echo "                    This command will ask you for root credentials!"
+    echo "install.sh help   : Prints this message."
+
+    exit 0
+fi
+
+# Define directory of chatbot
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+# Check if user is superuser
+if [[ "$EUID" -eq 0 ]]; then
+    echo "ERR: Please do not run this script as super user!"
+    exit 1
+fi
+
+#################################################################
+# Create function to check availability of software
+#################################################################
+function availability {
+    if [[ ! $(command -v $1) ]]; then
+        echo "ERR: '$1' is not available but required. Please install it!"
+        exit 1
+    fi
+}
+
+#################################################################
+# Create virtualenv
+#################################################################
+# Check whether virtualenv is present
+availability virtualenv
+
+# Create virtualenv
+virtualenv $DIR
+
+# Enter virtualenv
+source $DIR/bin/activate
+
+#################################################################
+# Install requirements
+#################################################################
+# Check whether pip3 is present
+availability pip3
+
+# Install requirements
+pip3 install -r requirements.txt
+
+#################################################################
+# Create config.json
+#################################################################
+echo ""
+echo "############################################################################"
+echo "This step will generate a configuration file. The resulting bot will be very"
+echo "simple and is only able to respond to the message "Hello bot". However, it"
+echo "forms the perfect base for further development."
+echo ""
+echo "In the following steps, an _existing_ user must be provided. If you did not"
+echo "yet create a user for your bot, please do so now!"
+echo "############################################################################"
+echo ""
+
+if [[ -f $DIR/config.json ]]; then
+    read -p "$DIR/config.json already exists. Should I overwrite it? [y/n]: " ow
+
+    if [[ $ow != y ]]; then
+        echo "ERR: Cannot write to $DIR/config.json!"
+        exit 1
+    fi
+fi
+
+read -p 'Matrix homeserver: ' servervar
+read -p 'Matrix username: ' uservar
+read -p 'Matrix password: ' passvar
+
+sed -e "s/\${servervar}/${servervar}/"\
+    -e "s/\${uservar}/${uservar}/"\
+    -e "s/\${passvar}/${passvar}/"\
+    $DIR/config.json.template > $DIR/config.json
+
+#################################################################
+# Configure service
+#################################################################
+if [[ $1 != service ]]; then
+    exit 0
+fi
+
+sudo useradd -r mchatbot
+
+sed -e "s/\${DIR}/${DIR}/"\
+    $DIR/matrix-chatbot.service.template > $DIR/matrix-chatbot.service
+
+sudo mv $DIR/matrix-chatbot.service /etc/systemd/system/matrix-chatbot.service
+
+sudo systemctl enable matrix-chatbot.service
+sudo systemctl start matrix-chatbot.service

matrix-chatbot.service.template

@@ -0,0 +1,14 @@
+[Unit]
+Description=Matrix chatbot
+After=multi-user.target
+
+[Service]
+Type=simple
+Restart=always
+RestartSec=3
+User=mchatbot
+WorkingDirectory=${DIR}
+ExecStart=${DIR}/bin/python run.py
+
+[Install]
+WantedBy=multi-user.target

matrix_bot_api/matrix_bot_api.py

@@ -15,6 +15,7 @@ HELP_LOCATION = os.path.join(os.path.dirname(__file__), 'help')
 private_message = "Hey {}! Ik heb je even een privébericht gestuurd 🙂"
 
 def eprint(*args, **kwargs):
+    '''Print error messages to stderr'''
     print(*args, file=sys.stderr, **kwargs)
 
 class MatrixBotAPI:
@@ -159,7 +160,11 @@ class MatrixBotAPI:
         help_text = open(HELP_LOCATION, mode="r").read()
 
         for plugin in self.plugins:
+            try:
                 help_text += plugin.help()
+            except TypeError:
+                # The plugin probably returned 0, ignore it
+                pass
 
         self.send_message_private_public(room, event, help_text)
 

plugins/admidio_events/admidio_events.py

@@ -2,7 +2,7 @@ __author__ = "Dennis Potter"
 __copyright__ = "Copyright 2019, Dennis Potter"
 __credits__ = ["Dennis Potter"]
 __license__ = "GPL-3.0"
-__version__ = "1.0.1"
+__version__ = "0.5.0"
 __maintainer__ = "Dennis Potter"
 __email__ = "dennis@dennispotter.eu"
 
@@ -16,14 +16,19 @@ import MySQLdb as mysql
 
 from matrix_bot_api.mregex_handler import MRegexHandler
 
+EVENTS_DATA_DIR = os.path.join(os.path.dirname(__file__),
+    '../../data/events')
+DATA_LOCATION = os.path.join(os.path.dirname(__file__),
+    '../../data/events/data.db')
 CONFIG_LOCATION = os.path.join(os.path.dirname(__file__), 'config.json')
 HELP_LOCATION = os.path.join(os.path.dirname(__file__), 'messages/help')
 MESSAGES_LOCATION = os.path.join(os.path.dirname(__file__),
     'messages/messages.dutch.json')
 
 class Plugin:
-    """ Description of event plugin """
-
+    """ This plugin grabs events from Admidio (https://admidio.org)
+    and lets users interact with the data
+    """
     def __init__(self, bot):
         # Load the configuration
         with open(CONFIG_LOCATION) as json_data:
@@ -61,7 +66,7 @@ class Plugin:
 
         try:
             # Try to make a new directory
-            os.mkdir("data/events")
+            os.mkdir(EVENTS_DATA_DIR)
 
             # Define query to INSERT event table to SQLite DB
             sql = """CREATE TABLE 'events' (
@@ -69,7 +74,7 @@ class Plugin:
                      'datetime_posted' datetime);"""
 
             # Open, execute, commit, and close SQLite database
-            sqlite_db = sqlite3.connect('data/events/data.db')
+            sqlite_db = sqlite3.connect(DATA_LOCATION)
             sqlite_cursor = sqlite_db.cursor()
             sqlite_cursor.execute(sql)
             sqlite_db.commit()
@@ -120,7 +125,7 @@ class Plugin:
         results = mysql_cursor.fetchall()
 
         # Open SQLite database
-        sqlite_db = sqlite3.connect('data/events/data.db')
+        sqlite_db = sqlite3.connect(DATA_LOCATION)
 
         sqlite_cursor = sqlite_db.cursor()
 

plugins/hello/README.md

@@ -0,0 +1 @@
+This is an example plugin with only a single callback. When a user says "Hello bot" in a room in which te bot is present, the user replies with "Hello \<username\>!".

plugins/hello/hello.py

@@ -0,0 +1,25 @@
+from matrix_bot_api.mregex_handler import MRegexHandler
+import os
+
+HELP_LOCATION = os.path.join(os.path.dirname(__file__), 'messages/help')
+
+class Plugin:
+    """ This is an example plugin with only a single callback. When
+    a user says "Hello bot" in a room in which te bot is present,
+    the user replies with "Hello <username>!".
+    """
+
+    def __init__(self, bot):
+        # Define sensitivity
+        self.handler = []
+
+        self.handler.append(MRegexHandler("Hello bot", self.info_callback))
+
+        # Save parent bot
+        self.bot = bot
+
+    def info_callback(self, room, event):
+        room.send_text(f"Hello {event['sender']}!")
+
+    def help(self):
+        return open(HELP_LOCATION, mode="r").read()

plugins/hello/messages/help

@@ -0,0 +1,5 @@
+<h5><i>Hello</i></h5>
+This is an example help message of an example plugin. This message is made up in HTML.
+<ul>
+    <li><i>bot</i>:&emsp;greet me with "Hello bot". I will greet you back.</li>
+</ul>

requirements.txt

@@ -0,0 +1 @@
+matrix-client>=0.3.2

run.py

@@ -3,14 +3,27 @@
 This is Peter. Peter is using the Python Matrix Bot API
 """
 
+__author__ = "Dennis Potter"
+__copyright__ = "Copyright 2019, Dennis Potter"
+__credits__ = ["Dennis Potter"]
+__license__ = "GPL-3.0"
+__version__ = "0.5.0"
+__maintainer__ = "Dennis Potter"
+__email__ = "dennis@dennispotter.eu"
+
 import json
+import os
+import time
+import threading
 
 # Bot API import
 from matrix_bot_api.matrix_bot_api import MatrixBotAPI
 
+CONFIG_LOCATION = os.path.join(os.path.dirname(__file__), 'config.json')
+
 def main():
     # Load the configuration
-    with open('config.json') as json_data:
+    with open(CONFIG_LOCATION) as json_data:
         config = json.load(json_data)
 
     # Create an instance of the MatrixBotAPI
@@ -19,11 +32,11 @@ def main():
     # Start polling
     bot.start_polling()
 
-    # Infinitely read stdin to stall main thread while the bot runs in other
-    # threads.
+    # Stall this thread while the bot runs in other threads. On ^C, this will
+    # indicate to all threads that they should cancel
     try:
-        while True:
-            input()
+        forever = threading.Event();
+        forever.wait()
     except:
         bot.cancel = True