feat(discord): bring back !say for Admins and DevopsMembers

discord/commands/handler.go

@@ -123,6 +123,8 @@ func OnDiscordMessage(s *discordgo.Session, m *discordgo.MessageCreate) {
 		Archive(args, s, m)
 	case "unarchive":
 		Unarchive(args, s, m)
+	case "say":
+		Say(args, s, m)
 	default:
 		logger.SugarLogger.Infof("Unknown command: %s", command)
 	}

discord/commands/say.go

@@ -0,0 +1,32 @@
+package commands
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/bwmarrin/discordgo"
+	"github.com/gaucho-racing/sentinel/discord/config"
+	"github.com/gaucho-racing/sentinel/discord/pkg/logger"
+	"github.com/gaucho-racing/sentinel/discord/service"
+)
+
+// Say reposts a message as the bot, so announcements come from Sentinel
+// rather than whoever typed them. The command message is always deleted,
+// including when access is denied, so a failed attempt doesn't linger.
+func Say(args []string, s *discordgo.Session, m *discordgo.MessageCreate) {
+	defer s.ChannelMessageDelete(m.ChannelID, m.ID)
+	if !requireGroupMembership(m, "say", []string{"Admins", "DevopsMembers"}) {
+		return
+	}
+	// Cut from the raw content rather than joining args, so line breaks and
+	// spacing in the announcement survive.
+	message := strings.TrimSpace(strings.TrimPrefix(m.Content, config.DiscordPrefix+"say"))
+	if message == "" {
+		service.SendDisappearingMessage(m.ChannelID, fmt.Sprintf("<@%s> usage: `%ssay <message>`", m.Author.ID, config.DiscordPrefix), commandReplyTTL)
+		return
+	}
+	if _, err := s.ChannelMessageSend(m.ChannelID, message); err != nil {
+		logger.SugarLogger.Errorf("say: failed to send in %s: %v", m.ChannelID, err)
+		service.SendDisappearingMessage(m.ChannelID, fmt.Sprintf("<@%s> couldn't send that message — check the logs.", m.Author.ID), commandReplyTTL)
+	}
+}