Better error handling

lib/cooldown.go

@@ -0,0 +1,66 @@
+package lib
+
+import (
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+var (
+	once     sync.Once
+	instance *CooldownManager
+)
+
+type CooldownManager struct {
+	cooldowns map[string]time.Time
+	mu        sync.Mutex
+}
+
+func GetCooldownManager() *CooldownManager {
+	once.Do(func() {
+		instance = &CooldownManager{
+			cooldowns: make(map[string]time.Time),
+		}
+	})
+	return instance
+}
+
+func (cm *CooldownManager) SetCooldown(userID, commandName string, duration time.Duration) {
+	cm.mu.Lock()
+	defer cm.mu.Unlock()
+	cm.cooldowns[userID+":"+commandName] = time.Now().Add(duration)
+}
+
+func (cm *CooldownManager) CheckCooldown(userID, commandName string) (bool, time.Duration) {
+	cm.mu.Lock()
+	defer cm.mu.Unlock()
+
+	key := userID + ":" + commandName
+	if cooldownEnd, exists := cm.cooldowns[key]; exists {
+		if time.Now().Before(cooldownEnd) {
+			return false, time.Until(cooldownEnd)
+		}
+		delete(cm.cooldowns, key)
+	}
+	return true, 0
+}
+
+func CheckAndApplyCooldown(s *discordgo.Session, i *discordgo.InteractionCreate, commandName string, duration time.Duration) bool {
+	cooldownManager := GetCooldownManager()
+	user, err := GetUser(i)
+	if err != nil {
+		RespondWithError(s, i, "Error processing command: "+err.Error())
+		return false
+	}
+
+	canUse, remaining := cooldownManager.CheckCooldown(user.ID, commandName)
+	if !canUse {
+		RespondWithError(s, i, fmt.Sprintf("You can use this command again in %v", remaining.Round(time.Second)))
+		return false
+	}
+
+	cooldownManager.SetCooldown(user.ID, commandName, duration)
+	return true
+}