Added all of the existing code

database.go

@@ -0,0 +1,100 @@
+package main
+
+import (
+	"database/sql"
+	"time"
+)
+
+// Database layer for persistent storage
+type DatabaseConfig struct {
+	Type     string            `json:"type"` // sqlite, mysql, postgres
+	Host     string            `json:"host"`
+	Port     int               `json:"port"`
+	Database string            `json:"database"`
+	Username string            `json:"username"`
+	Password string            `json:"password"`
+	Options  map[string]string `json:"options"`
+}
+
+type Database struct {
+	db     *sql.DB
+	config DatabaseConfig
+}
+
+// User account storage
+type UserAccount struct {
+	ID           int       `db:"id"`
+	Nick         string    `db:"nick"`
+	PasswordHash string    `db:"password_hash"`
+	Email        string    `db:"email"`
+	RegisterTime time.Time `db:"register_time"`
+	LastSeen     time.Time `db:"last_seen"`
+	Flags        []string  `db:"flags"`
+}
+
+// Channel registration
+type RegisteredChannel struct {
+	ID           int             `db:"id"`
+	Name         string          `db:"name"`
+	Founder      string          `db:"founder"`
+	RegisterTime time.Time       `db:"register_time"`
+	Topic        string          `db:"topic"`
+	Modes        string          `db:"modes"`
+	AccessList   []ChannelAccess `db:"-"`
+}
+
+type ChannelAccess struct {
+	Nick  string `db:"nick"`
+	Level int    `db:"level"` // 1=voice, 10=halfop, 50=op, 100=admin, 500=founder
+}
+
+// Persistent bans/quiets
+type NetworkBan struct {
+	ID       int       `db:"id"`
+	Mask     string    `db:"mask"`
+	Reason   string    `db:"reason"`
+	SetBy    string    `db:"set_by"`
+	SetTime  time.Time `db:"set_time"`
+	Duration int       `db:"duration"` // 0 = permanent
+	Type     string    `db:"type"`     // gline, kline, zline, qline
+}
+
+// Statistics tracking
+type ServerStats struct {
+	Date             time.Time `db:"date"`
+	MaxUsers         int       `db:"max_users"`
+	MaxChannels      int       `db:"max_channels"`
+	TotalConnections int64     `db:"total_connections"`
+	MessageCount     int64     `db:"message_count"`
+	OperCount        int       `db:"oper_count"`
+}
+
+func NewDatabase(config DatabaseConfig) (*Database, error) {
+	// Initialize database connection
+	return &Database{config: config}, nil
+}
+
+func (db *Database) CreateTables() error {
+	// Create all necessary tables
+	return nil
+}
+
+func (db *Database) GetUserAccount(nick string) (*UserAccount, error) {
+	// Retrieve user account
+	return nil, nil
+}
+
+func (db *Database) SaveUserAccount(account *UserAccount) error {
+	// Save user account
+	return nil
+}
+
+func (db *Database) GetChannelAccess(channel string) ([]ChannelAccess, error) {
+	// Get channel access list
+	return nil, nil
+}
+
+func (db *Database) LogStatistics(stats ServerStats) error {
+	// Log daily statistics
+	return nil
+}