gotirc

A Twitch.tv IRC library written in Go

Twitch chat uses a protocol built on TCP that is roughly based on Internet Relay Chat (IRC) RFC 1459. This package provides convenience functionality for implementing software that requires Twitch chat interaction (e.g., bots, statistics, etc.). The gotirc.Client public methods can be safely called from concurrent go-routines, and the API is inspired by tmi.js. Message sending is rate limited to avoid global bans.

Client

A gotirc.Client is used to connect to Twitch chat. Callbacks can be passed to the Client to perform actions when particular events occur.

    package main
    
    import (
        "log"
        "github.com/jrm780/gotirc"
    )
    
    func main() {
        options := gotirc.Options{
            Host:     "irc.chat.twitch.tv",
            Port:     6667,
            Channels: []string{"#twitch"},
        }

        client := gotirc.NewClient(options)
        
        // Whenever someone sends a message, log it
        client.OnChat(func(channel string, tags map[string]string, msg string) {
            log.Printf("[%s]: %s", tags["display-name"], msg)
        })
        
        // Connect and authenticate with the given username and oauth token
        client.Connect("justinfan1337", "abc123")
    }

Client.Connect(nick, pass) runs until the client is disconnected from the server. It's easy to implement automatic reconnecting by using a for-loop:

    client := gotirc.NewClient(options)
    for {
        err := client.Connect("justinfan1337", "abc123")
        fmt.Printf("Disconnected: %s. Reconnecting in 5 seconds...\n", err)
        time.Sleep(5*time.Second)
    }

The Client can perform the following actions

• Connect(nick string, pass string) error
  • Connects the client to the server specified in the options and uses the supplied nick and pass (oauth token) to authenticate. Connect blocks and runs event callbacks until disconnected
• Connected() bool
  • Returns true if the client is currently connected to the server, false otherwise
• Disconnect()
  • Closes the client's connection with the server
• Join(channel string)
  • Joins a channel
• Part(channel string)
  • Leaves a channel
• Say(channel string, msg string)
  • Sends a message to a channel
• Whisper(user string, msg string)
  • Sends a whisper to a user

Currently Implemented Callbacks

• OnAction(func(channel string, tags map[string]string, msg string))
  • Adds an event callback for action (e.g., /me) messages
• OnChat(func(channel string, tags map[string]string, msg string))
  • Adds an event callback for when a user sends a message in a channel
• OnCheer(func(channel string, tags map[string]string, msg string))
  • Adds an event callback for when a user cheers bits in a channel
• OnJoin(func(channel, username string))
  • Adds an event callback for when a user joins a channel
• OnPart(func(channel, username string))
  • Adds an event callback for when a user parts a channel
• OnResub(func(channel string, tags map[string]string, msg string))
  • Adds an event callback for when a user resubs to a channel
• OnSubscription(func(channel string, tags map[string]string, msg string))
  • Adds an event callback for when a user subscribes to a channel
• OnSubGift(func(channel string, tags map[string]string, msg string))
  • Adds an event callback for when one user gifts another a subscription to a channel. The tags for these messages are currently undocumented in the Twitch reference, so an example is provided:
    • badges="subscriber/0,bits/100"
    • color="#FF0000"
    • user-id="59638395"
    • display-name="GiftGiver1337"
    • login="giftgiver1337"
    • subscriber="1"
    • turbo="0"
    • user-type="..."
    • emotes="..."
    • id="8aee6b0e-b7eb-4c1b-99a8-dd875dd8688d"
    • mod="0"
    • msg-id="subgift"
    • msg-param-months="2"
    • msg-param-recipient-display-name="GiftRecipient1337"
    • msg-param-recipient-id="133769696"
    • msg-param-recipient-user-name="giftrecipient1337"
    • msg-param-sub-plan-name="The\sBest\sSubs"
    • msg-param-sub-plan="1000"
    • room-id="133742069"
    • system-msg="GiftGiver1337\sgifted\sa\s$4.99\ssub\sto\sGiftRecipient1337!"
    • tmi-sent-ts="1513746444792"

Tags are metadata associated with the message and include information such as the user's display-name and chat color. Twitch may change the tags at any time, so it's best to refer to their documentation to determine which data is available.