clearing unused values from database on ready

handlers.go

@@ -26,6 +26,7 @@ var commands []Command = []Command{cmd_form, cmd_tag, cmd_tag_short, cmd_dadjoke
 
 func ready(s *discordgo.Session, event *discordgo.Ready) {
 	fmt.Print("\nStarting up...")
+	findAndDeleteUnusedMessages()
 	removeOldCommandFromAllGuilds(s)
 	var existingCommandNames []string
 	for _, guild := range event.Guilds {
@@ -140,7 +141,7 @@ func messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {
 }
 
 func messageDelete(s *discordgo.Session, m *discordgo.MessageDelete) { //TODO: also clear on bot start when message doesn't exist
-	tryDeleteUnusedMessage(m.GuildID, m.ChannelID, m.ID)
+	tryDeleteUnusedMessage(m.ID)
 }
 
 func guildMemberJoin(s *discordgo.Session, m *discordgo.GuildMemberAdd) {

manage_data.go

@@ -361,9 +361,31 @@ func isAutopublishEnabled(guildID string, newsChannelID string) bool {
 	return enabled
 }
 
-func tryDeleteUnusedMessage(guildID string, channelID string, messageID string) {
-	_, err := db.Exec("DELETE FROM form_manage WHERE guild_id = $1 AND channel_id = $2 AND message_id = $3", guildID, channelID, messageID)
+func tryDeleteUnusedMessage(messageID string) {
+	_, err := db.Exec("DELETE FROM form_manage WHERE message_id = $1", messageID)
 	if err != nil {
 		log.Println(err)
 	}
 }
+
+func getAllSavedMessages() []MessageIDs {
+	var savedMessages []MessageIDs
+	rows, err := db.Query("SELECT message_id, channel_id FROM form_manage")
+	if err != nil {
+		log.Print(err)
+		return nil
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var messageID, channelID string
+		if err := rows.Scan(&messageID, &channelID); err != nil {
+			log.Print(err)
+			continue
+		}
+		savedMessages = append(savedMessages, MessageIDs{ID: messageID, ChannelID: channelID})
+	}
+	if err := rows.Err(); err != nil {
+		log.Print(err)
+	}
+	return savedMessages
+}

tool.go

@@ -27,6 +27,11 @@ type ModalJson struct {
 	Form     []ModalJsonField `json:"form"`
 }
 
+type MessageIDs struct {
+	ID        string
+	ChannelID string
+}
+
 func jsonStringShowModal(interaction *discordgo.Interaction, manageID string, formID string, overwrite ...string) {
 	var modal ModalJson = getModalByFormID(formID)
 	var components []discordgo.MessageComponent
@@ -152,3 +157,19 @@ func respondEmbed(interaction *discordgo.Interaction, embed discordgo.MessageEmb
 		},
 	})
 }
+
+func checkMessageNotExists(channelID, messageID string) bool {
+	_, err := bot.ChannelMessage(channelID, messageID)
+	if err != nil {
+		return true
+	}
+	return false
+}
+
+func findAndDeleteUnusedMessages() {
+	for _, message := range getAllSavedMessages() {
+		if checkMessageNotExists(message.ChannelID, message.ID) {
+			tryDeleteUnusedMessage(message.ID)
+		}
+	}
+}