From 842452f69020e7ef820ba525e636a8c78002d17d Mon Sep 17 00:00:00 2001
From: Luxferre <lux@ferre>
Date: Mon, 23 Sep 2024 21:46:45 +0300
Subject: [PATCH] Implemented channel point rewards

---
 src/twitch-ws.go | 53 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 src/twitch-ws.go

diff --git a/src/twitch-ws.go b/src/twitch-ws.go
new file mode 100644
index 0000000..3c59a97
--- /dev/null
+++ b/src/twitch-ws.go
@@ -0,0 +1,53 @@
+/*
+  StreamGoose Twitch backend — WebSocket PubSub API part
+  
+  Created by Luxferre in 2024, released into public domain
+*/
+
+package main
+
+import (
+  "fmt"
+
+  "github.com/plugnburn/go-twitch-pubsub"
+)
+
+/* process a single PubSub message */
+func tw_process_pubsub_msg(msg *twitchpubsub.PointsEvent) {
+  userinput := msg.UserInput
+  rewname := msg.Reward.Title
+  rewcost := msg.Reward.Cost
+  rewprompt := msg.Reward.Desc
+
+  /* format the reward text */
+  reward_text := fmt.Sprintf("%s redeemed %s for %d points", msg.User.DisplayName, rewname, rewcost)
+  if rewprompt != "" {
+    reward_text += fmt.Sprintf(" (with %s = %s)", rewprompt, userinput)
+  }
+  reward_text += "!"
+
+  /* create output message */
+  out_message := ChatMessage {
+    Type: "tw^system^reward",
+    NativeId: msg.Id,
+    AuthorId: msg.User.Id,
+    Timestamp: msg.RedeemedAt.UTC().Format("2006-01-02T15:04:05Z"),
+    Username: msg.User.DisplayName,
+    Text: reward_text,
+    Icon: "",
+  }
+
+  /* finally, send it to the message broker via the message_transport channel */
+  message_transport <- out_message
+
+}
+
+/* main loop to read PubSub messages */
+func tw_ws_pubsub_readloop() {
+  client := twitchpubsub.NewClient(twitchpubsub.DefaultHost)
+  client.Listen("community-points-channel-v1." + TW_BROADCASTER_ID, TW_OAUTH_TOKEN)
+  client.OnPointsEvent(func (channelId string, data *twitchpubsub.PointsEvent) {
+    tw_process_pubsub_msg(data)
+  })
+  client.Start()
+}