a micro-messaging bot to organize using public transport without having to pay.
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Ticketfrei social bot

Version: 2.0beta

Ticketfrei is a mastodon/twitter/mail bot to dodge ticket controllers in public transport systems.

The functionality is simple: it retweets every tweet where it is mentioned.

This leads to a community which evolves around it; if you see ticket controllers, you tweet their location and mention the bot. The bot then retweets your tweet and others can read the info and think twice if they want to buy a ticket. If enough people, a critical mass, participate for the bot to become reliable, you have positive self-reinforcing dynamics.

Today, you can use a Twitter, a Mastodon, and Mail with the account. They will communicate with each other; if someone warns others via Mail, Twitter and Mastodon users will also see the message. And vice versa.

In version 2, this bot has received a frontend website. On this website, people can register an own bot for their city - the website manages multiple bots for multiple citys. This way, you do not have to host it yourself.

In the promotion folder, you will find some (german) promotion material you can use to build up such a community in your city.

Website: ticketfrei.links-tech.org

More information: https://wiki.links-tech.org/IT/Ticketfrei

Do you want Ticketfrei in your city?

Just got to ticketfrei.links-tech.org or another website where this software is running.

  • Register a twitter account
  • Register a Mastodon account
  • Register on the ticketfrei site
  • Configure account
  • The hard part: do the promotion! You need a community.

Maintaining

There is one security hole: people could start mentioning the bot with useless information, turning it into a spammer. That's why it has to be maintained; if someone spams the bot, mute them and undo the retweet. So it won't retweet their future tweets and the useless retweet is deleted if someone tries to check if something was retweeted in the last hour or something.

To this date, we have never heard of this happening though.

blacklisting

You also need to edit the goodlist and the blacklist. You can do this on the website, in the settings of your bot.

Just add the words to the goodlist, which you want to require. A report is only spread, if it contains at least one of them. If you want to RT everything, just add a *.

There is also a blacklist, which you can use to automatically sort out malicious tweets. Be careful though, our filter can't read the intention with which a word was used. Maybe you wanted it there.

Do you want to offer a Ticketfrei website to others?

If you want to offer this website to others, feel free to do so. If you have questions, just open a GitHub issue or write to tech@lists.links-tech.org, we are happy to help and share best practices.

We wrote these installation notes, so you can set up the website easily:

Install

To Do:

sudo apt install python3 virtualenv uwsgi uwsgi-plugin-python3 nginx git
cd /srv
sudo git clone https://github.com/b3yond/ticketfrei
cd ticketfrei

Install the necessary packages, create and activate virtualenv:

virtualenv -p python3 .
. bin/activate

Install the dependencies:

pip install tweepy pytoml Mastodon.py bottle pyjwt pylibscrypt

Configure the bot:

cp config.toml.example config.toml
vim config.toml

This configuration is only for the admin. Users can log into twitter/mastodon/mail and configure their personal bot on the settings page.

Set up LetsEncrypt:

sudo apt-get install python-certbot-nginx -t stretch-backports
sudo certbot --authenticator webroot --installer nginx --agree-tos --redirect --hsts 

Deploy ticketfrei with uwsgi:

echo "Enter your domain name into the following prompt:" && read DOMAIN

# configure nginx
sudo sed -r "s/example.org/$DOMAIN/g" deployment/example.org.conf > /etc/nginx/sites-enabled/$DOMAIN.conf

# create folder for socket
sudo mkdir /var/run/ticketfrei
sudo chown www-data:www-data -R /var/run/ticketfrei
sudo chown www-data:www-data -R /var/log/ticketfrei

# start up nginx
sudo service nginx restart

# create and start the frontend systemd service
sudo cp deployment/ticketfrei-web.service /etc/systemd/system/
sudo systemctl daemon-reload
sudo systemctl start ticketfrei-web.service

Logs

There are several logfiles which you can look at:

# for the uwsgi deployment:
less /var/log/ticketfrei/uwsgi.log

# for the systemd service:
less /var/log/syslog

# for the nginx web server:
less /var/log/nginx/example.org_error.log