Telegram Bot, v1.4

Telegram channel bot.

Improve a logging.

custom logger:
- log message format:
  - add a name of a logger to its messages;
  - automatically add a color into log messages:
    - for a JSON data;
    - for an URL;
    - for a path;
- support a filtering of log messages by a specification of a minimal allowed log level;
- logging to a file:
  - add a saving of log messages to a specified file;
  - support an automatic daily rotation of log files;
use settings of the custom logger:
- for the web server logger;
- for the Telegram Bot API client logger;
errors handling:
- extend a logging of errors in the message button handler to all errors types;
- add a logging of all errors types in the bot polling loop.

$ telegram-bot -v | --version
$ telegram-bot -h | --help
$ telegram-bot [options]

Options:

-v, --version — show the version message and exit;
-h, --help — show this help message and exit;
-f PATH, --log-file PATH — base filename for rotated log files (default: ./logs/app.log);
-l NAME, --log-level NAME — minimal allowed log level (default: info).

Environment variables:

TELEGRAM_BOT_TOKEN — Telegram API access token;
TELEGRAM_BOT_CHANNEL — Telegram channel name;
TELEGRAM_BOT_PORT — bot API port (default: 4000);
TELEGRAM_BOT_ACCEPT_TEXT — text of the accept button (default: Accept);
TELEGRAM_BOT_REJECT_TEXT — text of the reject button (default: Reject);
TELEGRAM_BOT_DATABASE — path to the SQLite database file (default: ./votes.db);
TELEGRAM_BOT_CHANGEABLE_VOTE — flag denoting changeability of a vote (allowed: FALSE and TRUE; default: TRUE);
TELEGRAM_BOT_SWAP_BUTTONS — flag denoting inversion of the order of the buttons (allowed: FALSE and TRUE; default: TRUE).

Environment variables can be specified in a .env config in the format:

NAME_1=value_1
NAME_2=value_2
...

A .env config will never modify any environment variables that have already been set.

Content: code.

License: GPL-3.0-or-later.