Add twitch point song requests to the bot

This commits adds new feature for galchedbot: video requests
in the twitch chat via highlighted chat messages. This messages
parsed by the bot and added to the video queue, that can be
accessed by the dedicated web server. Video queue requires
authorization based on random token added to the cookies.

modules/twitchat/duphandler.go

@@ -26,7 +26,7 @@ func DupHandler() PrivateMessageHandler {
 	}
 }
 
-func (h *dupHandler) IsValid(m string) bool {
+func (h *dupHandler) IsValid(m *twitch.PrivateMessage) bool {
 	return true
 }
 

modules/twitchat/handlers.go

@@ -10,7 +10,7 @@ type (
 	}
 
 	PrivateMessageHandler interface {
-		IsValid(string) bool
+		IsValid(m *twitch.PrivateMessage) bool
 		Handle(m *twitch.PrivateMessage, r Responser)
 	}
 )

modules/twitchat/logcheck.go

@@ -0,0 +1,23 @@
+package twitchat
+
+import (
+	"log"
+
+	"github.com/gempir/go-twitch-irc/v2"
+)
+
+type (
+	logCheck struct{}
+)
+
+func LogCheck() PrivateMessageHandler {
+	return new(logCheck)
+}
+
+func (h *logCheck) IsValid(m *twitch.PrivateMessage) bool {
+	return true
+}
+
+func (h *logCheck) Handle(m *twitch.PrivateMessage, r Responser) {
+	log.Print("chat <", m.User.DisplayName, "> : ", m.Message)
+}

modules/twitchat/songrequest.go

@@ -0,0 +1,61 @@
+package twitchat
+
+import (
+	"fmt"
+	"log"
+	"strings"
+
+	"github.com/gempir/go-twitch-irc/v2"
+
+	"galched-bot/modules/youtube"
+)
+
+const (
+	songMsg   = "!song"
+	reqPrefix = "!req " // space in the end is important
+)
+
+type (
+	songRequest struct {
+		r *youtube.Requester
+	}
+)
+
+func SongRequest(r *youtube.Requester) PrivateMessageHandler {
+	return &songRequest{r: r}
+}
+
+func (h *songRequest) IsValid(m *twitch.PrivateMessage) bool {
+	return (strings.HasPrefix(m.Message, reqPrefix) && m.Tags["msg-id"] == "highlighted-message") ||
+		strings.TrimSpace(m.Message) == songMsg
+	// return strings.HasPrefix(m.Message, reqPrefix) || strings.TrimSpace(m.Message) == songMsg
+}
+
+func (h *songRequest) Handle(m *twitch.PrivateMessage, r Responser) {
+	if strings.TrimSpace(m.Message) == "!song" {
+		list := h.r.List()
+		if len(list) > 0 {
+			line := fmt.Sprintf("Сейчас играет: <%s>", list[0].Title)
+			r.Say(m.Channel, line)
+		} else {
+			r.Say(m.Channel, "Очередь видео пуста")
+		}
+		return
+	}
+
+	query := strings.TrimPrefix(m.Message, "!req ")
+	if len(query) == 0 {
+		return
+	}
+
+	chatMsg, err := h.r.AddVideo(query, m.User.DisplayName)
+	if err != nil {
+		log.Printf("yt: cannot add song from msg <%s>, err: %v", m.Message, err)
+		if len(chatMsg) > 0 {
+			r.Say(m.Channel, m.User.DisplayName+" "+chatMsg)
+		}
+		return
+	}
+	r.Say(m.Channel, m.User.DisplayName+" добавил "+chatMsg)
+	return
+}

modules/twitchat/twitchat.go

@@ -2,6 +2,7 @@ package twitchat
 
 import (
 	"galched-bot/modules/settings"
+	"galched-bot/modules/youtube"
 
 	"github.com/gempir/go-twitch-irc/v2"
 )
@@ -14,12 +15,14 @@ type (
 	}
 )
 
-func New(s *settings.Settings) (*TwitchIRC, error) {
+func New(s *settings.Settings, r *youtube.Requester) (*TwitchIRC, error) {
 	var irc = new(TwitchIRC)
 
 	irc.username = s.TwitchUser
 
 	irc.handlers = append(irc.handlers, DupHandler())
+	irc.handlers = append(irc.handlers, SongRequest(r))
+	// irc.handlers = append(irc.handlers, LogCheck())
 
 	irc.chat = twitch.NewClient(s.TwitchUser, s.TwitchToken)
 	irc.chat.OnPrivateMessage(irc.PrivateMessageHandler)
@@ -45,7 +48,7 @@ func (c *TwitchIRC) PrivateMessageHandler(msg twitch.PrivateMessage) {
 		return
 	}
 	for i := range c.handlers {
-		if c.handlers[i].IsValid(msg.Message) {
+		if c.handlers[i].IsValid(&msg) {
 			c.handlers[i].Handle(&msg, c.chat)
 		}
 	}