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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,182 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io" | ||
| "log" | ||
| "os" | ||
| "time" | ||
|
|
||
| "github.com/bwmarrin/discordgo" | ||
| "github.com/gin-gonic/gin" | ||
| "github.com/rs/zerolog" | ||
| "github.com/tr4cks/power/modules" | ||
| ) | ||
|
|
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| type DiscordBot struct { | ||
| config *DiscordBotConfig | ||
| module modules.Module | ||
|
|
||
| logger zerolog.Logger | ||
| session *discordgo.Session | ||
| registeredCommands []*discordgo.ApplicationCommand | ||
| } | ||
|
|
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| type DiscordBotConfig struct { | ||
| BotToken string `yaml:"bot-token" validate:"required"` | ||
| GuildId string `yaml:"guild-id"` | ||
| } | ||
|
|
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| func (d *DiscordBot) Start() error { | ||
| err := d.session.Open() | ||
| if err != nil { | ||
| return fmt.Errorf("cannot open the session: %w", err) | ||
| } | ||
|
|
||
| d.logger.Info().Msg("Adding commands...") | ||
| registeredCommands := make([]*discordgo.ApplicationCommand, len(commands)) | ||
| for i, v := range commands { | ||
| cmd, err := d.session.ApplicationCommandCreate(d.session.State.User.ID, d.config.GuildId, v) | ||
| if err != nil { | ||
| d.logger.Panic().Err(err).Msg(fmt.Sprintf("Cannot create '%v' command: %v", v.Name, err)) | ||
| } | ||
| registeredCommands[i] = cmd | ||
| } | ||
| d.registeredCommands = registeredCommands | ||
|
|
||
| return nil | ||
| } | ||
|
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| func (d *DiscordBot) Stop() { | ||
| d.logger.Info().Msg("Removing commands...") | ||
|
|
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| for _, v := range d.registeredCommands { | ||
| err := d.session.ApplicationCommandDelete(d.session.State.User.ID, d.config.GuildId, v.ID) | ||
|
|
||
| if err != nil { | ||
| log.Panicf("Cannot delete '%v' command: %v", v.Name, err) | ||
| } | ||
| } | ||
|
|
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| err := d.session.Close() | ||
| if err != nil { | ||
| d.logger.Error().Err(err).Msg("Unable to close the session") | ||
| } | ||
|
|
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| d.logger.Info().Msg("Gracefully shutting down") | ||
| } | ||
|
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| func (d *DiscordBot) powerOnHandler(s *discordgo.Session, i *discordgo.InteractionCreate) { | ||
| logger := d.logger.With().Str("username", i.Member.User.Username).Logger() | ||
| logger.Info().Msg("A user attempts to switch on the server") | ||
|
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| powerState, ledState := d.module.State() | ||
|
|
||
| defer func() { | ||
| time.Sleep(10 * time.Second) | ||
| s.InteractionResponseDelete(i.Interaction) | ||
| }() | ||
|
|
||
| if powerState.Err != nil { | ||
| logger.Error().Err(powerState.Err).Msg("Failed to retrieve POWER state") | ||
| s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{ | ||
| Type: discordgo.InteractionResponseChannelMessageWithSource, | ||
| Data: &discordgo.InteractionResponseData{ | ||
| Flags: discordgo.MessageFlagsEphemeral, | ||
| Content: "A problem occurred when switching on the server", | ||
| }, | ||
| }) | ||
| return | ||
| } | ||
| if ledState.Err != nil { | ||
| logger.Error().Err(ledState.Err).Msg("Failed to retrieve LED state") | ||
| s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{ | ||
| Type: discordgo.InteractionResponseChannelMessageWithSource, | ||
| Data: &discordgo.InteractionResponseData{ | ||
| Flags: discordgo.MessageFlagsEphemeral, | ||
| Content: "A problem occurred when switching on the server", | ||
| }, | ||
| }) | ||
| return | ||
| } | ||
|
|
||
| if powerState.Value || ledState.Value { | ||
| logger.Info().Msg("The server is already switched on") | ||
| s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{ | ||
| Type: discordgo.InteractionResponseChannelMessageWithSource, | ||
| Data: &discordgo.InteractionResponseData{ | ||
| Flags: discordgo.MessageFlagsEphemeral, | ||
| Content: "The server is already switched on", | ||
| }, | ||
| }) | ||
| return | ||
| } | ||
|
|
||
| err := d.module.PowerOn() | ||
| if err != nil { | ||
| logger.Error().Err(err).Msg("A problem occurred when switching on the server") | ||
| s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{ | ||
| Type: discordgo.InteractionResponseChannelMessageWithSource, | ||
| Data: &discordgo.InteractionResponseData{ | ||
| Flags: discordgo.MessageFlagsEphemeral, | ||
| Content: "A problem occurred when switching on the server", | ||
| }, | ||
| }) | ||
| return | ||
| } | ||
| logger.Info().Msg("Server switched on") | ||
|
|
||
| s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{ | ||
| Type: discordgo.InteractionResponseChannelMessageWithSource, | ||
| Data: &discordgo.InteractionResponseData{ | ||
| Flags: discordgo.MessageFlagsEphemeral, | ||
| Content: "The server turns on, give it some time...", | ||
| }, | ||
| }) | ||
| } | ||
|
|
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| var commands = []*discordgo.ApplicationCommand{ | ||
| { | ||
| Name: "power-on", | ||
| Description: "Turns the server on", | ||
| }, | ||
| } | ||
|
|
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| func NewDiscordBot(config *DiscordBotConfig, module modules.Module) (*DiscordBot, error) { | ||
| var outputWriter io.Writer = os.Stderr | ||
| if gin.Mode() != "release" { | ||
| outputWriter = zerolog.ConsoleWriter{Out: os.Stderr} | ||
| } | ||
| logger := zerolog. | ||
| New(outputWriter). | ||
| With(). | ||
| Timestamp(). | ||
| Str("scope", "discord"). | ||
| Logger() | ||
|
|
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| session, err := discordgo.New("Bot " + config.BotToken) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("invalid bot parameters: %w", err) | ||
| } | ||
|
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| bot := &DiscordBot{config, module, logger, session, nil} | ||
|
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| commandHandlers := map[string]func(*discordgo.Session, *discordgo.InteractionCreate){ | ||
| "power-on": bot.powerOnHandler, | ||
| } | ||
|
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| session.AddHandler(func(s *discordgo.Session, i *discordgo.InteractionCreate) { | ||
| if h, ok := commandHandlers[i.ApplicationCommandData().Name]; ok { | ||
| h(s, i) | ||
| } | ||
| }) | ||
|
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| session.AddHandler(func(s *discordgo.Session, r *discordgo.Ready) { | ||
| logger.Info(). | ||
| Str("discriminator", s.State.User.Discriminator). | ||
| Str("username", s.State.User.Username). | ||
| Msg(fmt.Sprintf("Logged in as: %v#%v", s.State.User.Username, s.State.User.Discriminator)) | ||
| }) | ||
|
|
||
| return bot, nil | ||
| } |
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