Matrix Reminder Bot

A short bot written with nio-template.

Features

• Set reminders
• Have the bot remind you or the whole room
• Reminders persist between bot restarts
• Alarms - persistent notifications for a reminder until silenced
• Supports end-to-end encrypted rooms

Install

matrix-reminder-bot requires matrix-nio, which supports participation in end-to-end encryption rooms! To do so, it makes use of the libolm C library. This library must be installed to allow for end-to-end encryption functionality, and unfortunately it is also required for functional message polling, so it is practically a hard required for this program.

Unfortunately, installation of this library can be non-trivial on some platforms. However, with the power of docker, dependencies can be handled with little fuss, and it is thus the recommended method of installing matrix-reminder-bot. Native installation instructions are also provided, but be aware that they are more complex.

Docker

Recommended. Follow the docker installation instructions.

Matrix Docker Ansible Deploy

The matrix-docker-ansible-deploy supports setting up a whole Matrix stack including lots of addons mostly automatically, including Matrix Reminder Bot.

Native installation

Install libolm

You can install libolm from source, or alternatively, check your system's package manager. Version 3.0.0 or greater is required. Version 3.2.16 or greater is required with Python 3.12.

(Optional) postgres development headers

By default, matrix-reminder-bot uses SQLite as its storage backend. This is fine for a few hundred users, but if you plan to support a much higher volume of requests, you may consider using Postgres as a database backend instead.

If you want to use postgres as a database backend, you'll need to install postgres development headers:

Debian/Ubuntu:

sudo apt install libpq-dev libpq5

Arch:

sudo pacman -S postgresql-libs

Install Python dependencies

Create and activate a Python 3 virtual environment:

python3 -m venv env
source env/bin/activate

Install python dependencies:

pip install matrix-reminder-bot

(Optional) If you want to use postgres as a database backend, use the following command to install postgres dependencies alongside those that are necessary:

pip install "matrix-reminder-bot[postgres]"

Configuration

Copy the sample configuration file to a new config.yaml file.

cp sample.config.yaml config.yaml

Edit the config file. The matrix section must be modified at least.

(Optional) Set up a Postgres database

Create a postgres user and database for matrix-reminder-bot:

sudo -u postgresql psql createuser matrix-reminder-bot -W  # prompts for a password
sudo -u postgresql psql createdb -O matrix-reminder-bot matrix-reminder-bot

Edit the storage.database config option, replacing the sqlite://... string with postgres://.... The syntax is:

database: "postgres://username:password@localhost/dbname?sslmode=disable"

See also the comments in sample.config.yaml.

Running

Docker

Refer to the docker run instructions.

Native installation

Make sure to source your python environment if you haven't already:

source env/bin/activate

Then simply run the bot with:

matrix-reminder-bot

By default, the bot will run with the config file at ./config.yaml. However, an alternative relative or absolute filepath can be specified after the command:

matrix-reminder-bot other-config.yaml

Usage

Invite the bot to a room and it should accept the invite and join.

Setting a reminder

Have the bot ping you in the room about something:

!remindme <time>; <reminder text>

• <time> is a time that can be expressed in natural language. Examples include "tomorrow at noon", "on thursday at 5pm", "in 1 week", etc.
• <reminder text> is the text that the bot will remind you with.

Have the bot ping you and everyone else in the room about something (assuming the bot has permissions to do so):

!remindroom <time>; <reminder text>

Recurring reminders

To create a recurring reminder, put every followed by a length of time, then the time that the reminder should first go off, and then the reminder text:

!remindme every 1w; tuesday; take out the trash

!remindroom every 5m; 1m; you are loved

Cron-style reminders

If you need more complicated functionality for your reminder's timing, you can make use of cron tabs. You can read a guide on cron tabs here.

In short they allow you to execute more complicated, recurring reminders, such as those that should only fire during weekdays.

!remindme cron * 9 * * mon-fri; time for the daily stand up

The above reminder would fire each weekday at 9:00am.

!remindme cron 0/30 9-18 * * mon,wed,fri; take a short break

The above reminder would fire every 30 minutes after 9:00am, until 6:30pm, and only on Monday, Wednesday and Friday.

List upcoming reminders

!listreminders

This will output a list of reminders and when they will fire next:

sometime Do the dishes (every 1d)
sometime Take out the trash
sometime Send email to Grandma

Cancel a reminder

!cancelreminder <reminder text>

Setting an alarm

Alarms are the same as a reminder, but they will repeat every 5 minutes after firing until they are silenced.

Creating an alarm is the same syntax as creating a reminder, besides a different command:

!alarmme <time>; <reminder text>

!alarmroom every <recurring time>; <start time>; <reminder text>

Silencing an alarm

An alarm can be silenced with the following command:

!silence <reminder text>

iOS Shortcuts

WARNING: These shortcuts will save a Matrix account access token in plain text inside the shortcuts. Proceed with caution.

iOS Shortcuts have been created to quickly send reminder requests to a room with the reminder bot on your Matrix server. These requests will be unencrypted on the server.

Normal reminder: https://www.icloud.com/shortcuts/f151c91bd766461bafe8f46c71f66404

Cron reminder: https://www.icloud.com/shortcuts/09e5359c076247dabcc9ae788ae37fc7

Development

Please see CONTRIBUTING.md.

Related

• https://github.com/maubot/reminder (Maubot, Python)
• https://github.com/cromo/mx-timer-bot (TypeScript)
• https://github.com/CubicrootXYZ/RemindMe (Golang)
• https://github.com/ilikeorangutans/jarvis (Golang)
• https://github.com/erikjohnston/reminderbot (Rust)
• https://github.com/dfuchss/YARB (Kotlin)
• https://github.com/turt2live/matrix-ics-bot (ical, TypeScript)
• https://gitlab.com/uhoreg/matrix_daily_calendar (CalDAV, Python)
• https://github.com/matrix-org/matrix-hookshot (Atom/RSS/Webhooks, TypeScript)
• https://github.com/matrix-org/go-neb (Atom/RSS, Golang)