A bot to synchronise chat between an DC hub and a Telegram supergroup.

Tags: NMDC
Written in Go
[go-get]code.ivysaur.me/nmdc-telegramfrontend git https://git.ivysaur.me/code.ivysaur.me/nmdc-telegramfrontend.git[/go-get]

=FEATURES=

- Supports NMDC / NMDCS / ADC / ADCS hubs
- Automatically upload photos/files/videos/audio/stickers to a Contented server for DC users
- Fallback upload to thumbnail-only if exceeding declared Contented file size limit
- Convert telegram quoted messages to DC quoting style
- Exclude messages from multiple hub nicks (e.g. `Hub-Security` / `PtokaX` and helper bots)
- Standalone binary
- PM with native users
- Get native userlist inside the telegram group chat
- Option for length requirement on native nick
- Disconnect telegram users who fail to log in to the upstream hub

=SETUP=

Create a new telegram bot
	- Use BotFather to create a new bot
	- Use BotFather to disable its privacy mode for group chats
	- Use BotFather to add commands (that appear in the groupchat). Recommendation: `userlist - List native online users`
	
Create a telegram group
	- Manually create a group chat and add the bot to it
	- Convert group chat to supergroup
	- Grant bot to be an administrator (including ability to add more administrators)
	- Settings > "Who can add members" > Only administrators
	- Create an invite link
	
Handover to nmdc-telegramfrontend
	- Run this bot with no -GroupChatID, to learn the groupchat ID
	- Post a test message in the group chat, to discover the groupchat ID
	- Leave the group chat (long press on mobile, can't do it on desktop)
	- Run this bot with -GroupChatID for normal operation

=USAGE=

Chat with the bot to enter/leave the synchronised channel.

Sometimes the telegram invite links can take a few minutes to activate, especially if there has been unusual activity (e.g. frequent join/parts)

=CHANGELOG=

2018-06-10 1.0.1
- Send DC captions on TG photos and voice clips
- Send DC message when sharing a TG contact
- Fix a cosmetic issue with missing format specifier in log message

2018-06-09 1.0.0
- Initial public release

2018-06-03
- Private beta