Add improve webhook integration

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.20-bullseye
+FROM golang:1.21-bullseye
 
 RUN apt update -y
 

discord/discord.go

@@ -67,6 +67,9 @@ func (discord *Discord) Run() error {
 		}
 	})
 
+	// Validate state
+	discord.RefreshWebhookState()
+
 	// Keep alive
 	discord.stop = make(chan os.Signal, 1)
 	signal.Notify(discord.stop, os.Interrupt)

discord/message.go

@@ -8,6 +8,35 @@ import (
 	"github.com/yeslayla/birdbot/persistence"
 )
 
+const WebhookName = "BirdBot"
+
+// RefreshWebhookState refreshes the state of all webhooks
+func (discord *Discord) RefreshWebhookState() {
+	channels, err := discord.session.GuildChannels(discord.guildID)
+	if err != nil {
+		log.Printf("Error getting channels: %s", err)
+		return
+	}
+
+	for _, channel := range channels {
+		webhookData, err := discord.db.GetDiscordWebhook(channel.ID)
+		if err != nil {
+			log.Printf("Error getting webhook from DB: %s", err)
+			return
+		}
+
+		if webhookData == nil {
+			continue
+		}
+
+		_, err = discord.session.WebhookEdit(webhookData.ID, WebhookName, discord.GetAvatarBase64(NewUser(discord.session.State.User)), channel.ID)
+		if err != nil {
+			log.Printf("Error updating webhook: %s", err)
+		}
+	}
+}
+
+// WebhookSendMessage sends a message to a channel using a webhook
 func (discord *Discord) WebhookSendMessage(channel *core.Channel, displayName string, message string) {
 
 	webhookData, err := discord.db.GetDiscordWebhook(channel.ID)
@@ -17,7 +46,9 @@ func (discord *Discord) WebhookSendMessage(channel *core.Channel, displayName st
 	}
 
 	if webhookData == nil {
-		webhook, err := discord.session.WebhookCreate(channel.ID, "BirdBot", "")
+		webhookAvatar := discord.GetAvatarBase64(NewUser(discord.session.State.User))
+
+		webhook, err := discord.session.WebhookCreate(channel.ID, WebhookName, webhookAvatar)
 		if err != nil {
 			log.Printf("Error creating webhook: %s", err)
 			return

discord/user.go

@@ -1,6 +1,11 @@
 package discord
 
 import (
+	"bytes"
+	"encoding/base64"
+	"fmt"
+	"image"
+	"image/jpeg"
 	"log"
 
 	"github.com/bwmarrin/discordgo"
@@ -23,6 +28,36 @@ func NewUser(user *discordgo.User) common.User {
 	}
 }
 
+// GetAvatar returns the users Avatar as a image.Image
+func (discord *Discord) GetAvatar(user common.User) image.Image {
+	discordUser, err := discord.session.User(user.ID)
+	if err != nil {
+		log.Println("Error getting user: ", err)
+		return nil
+	}
+
+	avatar, err := discord.session.UserAvatarDecode(discordUser)
+	if err != nil {
+		log.Println("Error decoding avatar: ", err)
+		return nil
+	}
+
+	return avatar
+}
+
+// GetAvatarBase64 returns the base64 encoded avatar of a user
+func (discord *Discord) GetAvatarBase64(user common.User) string {
+	avatar := discord.GetAvatar(user)
+
+	fmtAvatar := &bytes.Buffer{}
+	if err := jpeg.Encode(fmtAvatar, avatar, nil); err != nil {
+		log.Println("Error encoding avatar: ", err)
+		return ""
+	}
+
+	return fmt.Sprintf("data:image/png;base64,%s", base64.StdEncoding.EncodeToString(fmtAvatar.Bytes()))
+}
+
 // AssignRole adds a role to a user
 func (discord *Discord) AssignRole(user common.User, role *Role) error {
 	return discord.session.GuildMemberRoleAdd(discord.guildID, user.ID, role.ID)