telegram-member-count-html-widget

It is created for Russian 3d makers against covid19 community

There are several telegram groups for different regions.

Task is to watch the member count of each group and to provide embed html code to be put on external website.

NodeJS, express.js and MongoDB

parts

• consumer - a telegram bot, which should be an administrator of telegram chats. Monitors member count, writes to database.
• server - express.js server providing embed html code with a map.

commands

start consumer: npm run consumer

start server: npm run server

configuration

• copy src/config.sample.js to config.js
• set bot token, mongodb connection string, webpage domain (because yandex api key is for only one domain),
• yandex maps api key, admins list (can be both usernames and ids).
• if you need ssl, obtain certificates and configure nginx reverse proxy, see config below.

telegram bot

telegram bot shall be admin in every chat and have ability to read messages. there can be a variant when telegram bot is admin with no permissions, but in this case you shall put id of chats to the database manually

nginx config for using with ssl

server {
        listen 80 default_server;
        listen [::]:80 default_server;

        location / {
                return 301 https://$host$request_uri;
        }
}

server {
        listen 443 ssl default_server;
        listen [::]:443 ssl default_server;

        ssl_certificate ...;
        ssl_certificate_key  ...;

        root /var/www/html;

        index index.html index.htm index.nginx-debian.html;

        server_name _;

        location / {
                proxy_set_header  X-Real-IP $remote_addr;
                proxy_pass http://localhost:2222;
        }
}