Echo bot for Telegram & Vk.com

This repo contains my attempt to learn haskell by creating simple echo bot.

stack build
stack test
stack exec bot-exe -- --config .conf

Configuration

The bot can be configured via these three sources in order of decreasing priority:

Command line arguments

Option name is prefixed by --

bot --config .conf --tg.token 123456:AaseDG55y

Environment variables

In the option name . is replaced by _, and the whole name is prefixed with BOT_

BOT_tg_token=123456:AaseDG55y bot

Config file

Use --config parameter to specify config file. It consists of key value pairs, separated by =. Supports comments, starting with # and multiline strings. Quotes " are optional for values.

# Config file for the bot

# tg.proxy  = 127.0.0.1:9080
tg.token  = 1258788986:AAErwZlr

logLevel = Debug

helpText = "
Hi,
what did you wanted?
"

Options

Per API options can be used with tg. or vk. prefix. If used as is the option applied to both API's

Option	Type	Value	Default	Description
helpText	Global	String	Some text	/help command answer
logLevel	Per API	Debug | Info | Warning | Error	Warning	Log level
proxy	Per API	localhost:5000	--	Http proxy host and port
repeatTimes	Global	Integer	5	Initial number of repetitions
tg.token	For Tg API	String	--	Telegram bot token
vk.groupId	For Vk API	Integer	--	Vkontakte group id
vk.token	For Vk API	String	--	Vkontakte group token

Project structure

Module	Description
Bot.API	Interface of a bot API
Bot.IO	Interface of a bot logic
Bot	Bot engine
Deserialization	Common JSON deserialization options
EchoBot.Options	Echo bot options
EchoBot.State	Echo bot state
EchoBot	Implementation of the echo bot logic
Logger	Logger definition and implementation
Misc	Miscellaneous functions
Options	Reading options from CLI arguments, environment variables and config file
Telegram.Chat	Telegram chat object
Telegram.Message	Telegram message object
Telegram.Update	Telegram update object
Telegram.User	Telegram user object
Telegram	Telegram bot API definition
UserData	Storing clients data in RAM
Vk.Message	Vkontakte message object
Vk.Poll	Long poll Vkontakte related stuff
Vk.Update	Vkontakte update object
Vk	Vkontakte bot API definition