First commit

.editorconfig

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+# http://editorconfig.org
+root = true
+
+[*]
+end_of_line = lf
+indent_style = tab
+indent_size = 4
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false

.env.example

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+DISCORD_BOT_TOKEN=Your-Discord-Bot-Token-Here
+REACT_USER_ID="81332863928119296"

.gitattributes

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+* text eol=lf

.gitignore

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+.env
+
+# Ignore binary files
+moyaireactbot
+moyaireactbot.exe

README.md

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+# MoyaiReactBot
+
+1. Copy file `.env.example` to `.env`
+2. Add your Discord bot token to `.env`
+3. Run `go build`
+4. Run `./moyaireactbot`
+5. Hopefully it runs idk.

go.mod

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+module moyaireactbot
+
+go 1.13
+
+require (
+	github.com/bwmarrin/discordgo v0.20.2
+	github.com/joho/godotenv v1.3.0
+)

go.sum

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+github.com/bwmarrin/discordgo v0.20.2 h1:nA7jiTtqUA9lT93WL2jPjUp8ZTEInRujBdx1C9gkr20=
+github.com/bwmarrin/discordgo v0.20.2/go.mod h1:O9S4p+ofTFwB02em7jkpkV8M3R0/PUVOwN61zSZ0r4Q=
+github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q=
+github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
+github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=
+github.com/joho/godotenv v1.3.0/go.mod h1:7hK45KPybAkOC6peb+G5yklZfMxEjkZhHbwpqxOKXbg=
+golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16 h1:y6ce7gCWtnH+m3dCjzQ1PCuwl28DDIc3VNnvY29DlIA=
+golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=

main.go

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+package main
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/bwmarrin/discordgo"
+	"github.com/joho/godotenv"
+)
+
+var (
+	token       string
+	reactUserID string
+)
+
+func init() {
+	err := godotenv.Load()
+
+	if err != nil {
+		fmt.Println("Could not load .env file: ", err)
+		os.Exit(1)
+	}
+
+	token = os.Getenv("DISCORD_BOT_TOKEN")
+	reactUserID = os.Getenv("REACT_USER_ID")
+
+	if token == "" || reactUserID == "" {
+		fmt.Println("DISCORD_BOT_TOKEN and REACT_USER_ID variables have to be set.")
+		os.Exit(1)
+	}
+}
+
+func main() {
+	bot, err := discordgo.New("Bot " + token)
+
+	if err != nil {
+		fmt.Println("Could not create Discord bot instance:", err)
+		return
+	}
+
+	bot.AddHandler(messageCreate)
+
+	err = bot.Open()
+	if err != nil {
+		fmt.Println("Error opening connection to Discord:", err)
+		return
+	}
+
+	fmt.Println("Bot is now running.  Press CTRL-C to exit.")
+	sc := make(chan os.Signal, 1)
+	signal.Notify(sc, syscall.SIGINT, syscall.SIGTERM, os.Interrupt, os.Kill)
+	<-sc
+
+	bot.Close()
+}
+
+func messageCreate(sess *discordgo.Session, msg *discordgo.MessageCreate) {
+	if msg.Author.ID != reactUserID {
+		return
+	}
+
+	channelID := msg.ChannelID
+	msgID := msg.ID
+
+	err := sess.MessageReactionAdd(channelID, msgID, "🗿")
+
+	if err != nil {
+		fmt.Println("Error occurred reacting to message ID: "+msgID, err)
+	}
+}