reddit-to-telegram

Fetches hot posts from chosen subreddits and pushes them to Telegram channels.

Beware, this is remotely not production-ready, API will change, you'll see lots of bugs and it may break at any time. Be sure to check for gem updates.

You can set this bot up absolutely for free via AWS Lambda, no ruby knowledge required.

Installation

In your Gemfile add:

gem "reddit-to-telegram"

Then run bundle install.

Or gem install reddit-to-telegram. Don't forget to require it.

Prerequisites

Obtain a telegram bot token
(Optionally) You'll need an AWS account to host a free DynamoDB (best available storage type, also default one). I also recommend hosting the bot on AWS lambda, since it would be free.
(Optionally) Create a Reddit app, which would allow more requests to reddit

It is pretty congifurable, either dynamically or via ENV variables. To assign variables dynamically, set them via RedditToTelegram.config.variable_name= , e.g. RedditToTelegram.config.aws.access_key_id = .... You can also create an ENV variable with a corresponding name. Here is the full configuration explained. Required options have a * next to them.

Config variable	Corresponding ENV Variable	Description
add_channel_handle	-	Add channel handle to Telegram posts. Accepted values: true or false. Default is false
add_reddit_link	-	Add reddit link to Telegram posts. Accepted values: true or false. Default is false.
logger	-	Which logger to use. You can pass your own ruby logger
on_error	-	What to do when an error happens. Default is :log, but you can also :raise or :ignore
send_errors_to_telegram	-	Also log errors to telegram (besides regular logging). Accepted values: true or false, default is false
translate	-	Translate posts via Google Translate. Leave empty for no translation. More details below
aws.access_key_id	RTT_AWS_ACCESS_KEY_ID	Your AWS access key ID. Needed for AWS DynamoDB storage
aws.region	RTT_AWS_REGION	AWS region your DynamoDB is hosted on
aws.secret_access_key	RTT_AWS_SECRET_ACCESS_KEY	Your AWS access key ID. Needed for AWS DynamoDB storage.
google.api_key	RTT_GOOGLE_API_KEY	Your Google API key to translate posts via Google Translate
reddit.client_id	RTT_REDDIT_CLIENT_ID	Reddit app credentials to access API. Reddit allows more authenticated requests
reddit.client_secret	RTT_REDDIT_CLIENT_SECRET	Reddit app credentials to access API. Reddit allows more authenticated requests
store.max_stored_posts	RTT_MAX_STORED_POSTS	Number of posts to store in the database to avoid duplicates, default is 25
store.tmp_dir	RTT_TEMP_DIR	Directory to write temp files to without trailing `/`
store.type	RTT_STORE_TYPE	Choose between `aws_dynamo_db`, `memory` or `temp_file`. Default is `aws_dynamo_db`, so if you're not specifying your AWS credentials, you have to choose another store type
telegram.bot_token *	RTT_TELEGRAM_BOT_TOKEN	The token you've received when you've created a telegram bot
telegram.error_channel_id	RTT_TELEGRAM_ERROR_CHANNEL_ID	Telegram channel to send errors to (without `@`, only errors from Telegram API responses would be sent for now)

Usage

Add the bot as administrator to Telegram channels you'd like to post to.
To fetch latest hot post which hasn't been pushed yet:

RedditToTelegram.hot(
  telegram_channel_id_1: :subreddit_name_1,
  telegram_channel_id_2: [:subreddit_name_2, :subreddit_name_3],
  telegram_channel_id_3: :subreddit_name_2
)

You can push posts from one subreddit to one telegram channel, several-to-one, one-to-several, several-to-several, whatever you like. You can also push one specific post:

RedditToTelegram.from_link(telegram_channel_id: "https://#{regular_link_to_post}")

Use :telegram_channel_id without the @.

Translation

Translation option is supported. You will have to set RedditToTelegram.config.translate to the language key you want to translate to. You can find available languages in Google Translate docs. You will also have to set up Google Translate API key assign it to RedditToTelegram.config.google.api_key.