added enhanced DB functions

Bot/Helpers/suggestion_db.go

@@ -2,6 +2,7 @@ package helpers
 
 import (
 	"database/sql"
+	"fmt"
 	"os"
 	"path/filepath"
 	"sync"
@@ -62,6 +63,28 @@ func SetLastSubmission(userID string) error {
 	return err
 }
 
+func RemoveUserSubmittions(userId string) error {
+	_, err := db.Exec(`
+		DELETE FROM suggestion_cooldowns WHERE user_id = ?
+	`, userId)
+
+	return err
+}
+
+func SweepExpiredSubmissions(expiration time.Duration) error {
+	cutoff := time.Now().Add(-expiration)
+	result, err := db.Exec("DELETE FROM suggestion_cooldowns WHERE last_submission <= ?", cutoff)
+
+	if err != nil {
+		return fmt.Errorf("failed to sweep expired submissions: %w", err)
+	}
+
+	rowsDeleted, _ := result.RowsAffected()
+	fmt.Printf("Swept %d expired entries from suggestion_cooldowns\n", rowsDeleted)
+
+	return nil
+}
+
 func CloseDB() error {
 	if db != nil {
 		return db.Close()