feat: leveling system

internal/events/event_handlers.go

@@ -0,0 +1,49 @@
+package events
+
+import (
+	"context"
+	"log"
+	"strconv"
+	"strings"
+	"velox-bot/internal/db/services"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+func HandleMessageCreate(s *discordgo.Session, m *discordgo.MessageCreate, services *services.Services) {
+	if m.Author.Bot || m.GuildID == "" {
+		return
+	}
+	ctx := context.Background()
+	guildID := mustParseInt64(m.GuildID)
+	userID := mustParseInt64(m.Author.ID)
+	res, err := services.Level.HandleMessage(ctx, guildID, userID)
+	if err != nil || !res.LeveledUp {
+		return
+	}
+	// Decide where to send the level-up message
+	targetChannelID := m.ChannelID
+	if res.LevelupChannel != 0 {
+		targetChannelID = strconv.FormatInt(res.LevelupChannel, 10)
+	}
+	content, err := services.LevelSettings.GetLevelUpMessage(ctx, guildID)
+	if err != nil {
+		return
+	}
+	content = strings.ReplaceAll(content, "{user}", m.Author.Mention())
+	content = strings.ReplaceAll(content, "{level}", strconv.Itoa(res.NewLevel))
+
+	s.ChannelMessageSend(targetChannelID, content)
+	// Apply role reward if any
+	if res.RoleRewardID != 0 {
+		roleID := strconv.FormatInt(res.RoleRewardID, 10)
+		if err := s.GuildMemberRoleAdd(m.GuildID, m.Author.ID, roleID); err != nil {
+			log.Printf("Failed to add role reward: guild=%s user=%s role=%s err=%v", m.GuildID, m.Author.ID, roleID, err)
+		}
+	}
+}
+
+func mustParseInt64(s string) int64 {
+	id, _ := strconv.ParseInt(s, 10, 64)
+	return id
+}