Add full monorepo: virtual-banker, backend, frontend, docs, scripts, deployment

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/database/config/database.go

@@ -0,0 +1,102 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+// DatabaseConfig holds database configuration
+type DatabaseConfig struct {
+	Host            string
+	Port            int
+	User            string
+	Password        string
+	Database        string
+	SSLMode         string
+	MaxConnections  int
+	MaxIdleTime     time.Duration
+	ConnMaxLifetime time.Duration
+}
+
+// LoadDatabaseConfig loads database configuration from environment variables
+func LoadDatabaseConfig() *DatabaseConfig {
+	maxConns, _ := strconv.Atoi(getEnv("DB_MAX_CONNECTIONS", "25"))
+	maxIdle, _ := time.ParseDuration(getEnv("DB_MAX_IDLE_TIME", "5m"))
+	maxLifetime, _ := time.ParseDuration(getEnv("DB_CONN_MAX_LIFETIME", "1h"))
+
+	return &DatabaseConfig{
+		Host:            getEnv("DB_HOST", "localhost"),
+		Port:            getIntEnv("DB_PORT", 5432),
+		User:            getEnv("DB_USER", "explorer"),
+		Password:        getEnv("DB_PASSWORD", ""),
+		Database:        getEnv("DB_NAME", "explorer"),
+		SSLMode:         getEnv("DB_SSLMODE", "disable"),
+		MaxConnections:  maxConns,
+		MaxIdleTime:     maxIdle,
+		ConnMaxLifetime: maxLifetime,
+	}
+}
+
+// ConnectionString returns PostgreSQL connection string
+func (c *DatabaseConfig) ConnectionString() string {
+	return fmt.Sprintf(
+		"host=%s port=%d user=%s password=%s dbname=%s sslmode=%s",
+		c.Host, c.Port, c.User, c.Password, c.Database, c.SSLMode,
+	)
+}
+
+// PoolConfig returns pgxpool configuration
+func (c *DatabaseConfig) PoolConfig() (*pgxpool.Config, error) {
+	config, err := pgxpool.ParseConfig(c.ConnectionString())
+	if err != nil {
+		return nil, err
+	}
+
+	config.MaxConns = int32(c.MaxConnections)
+	config.MaxConnIdleTime = c.MaxIdleTime
+	config.MaxConnLifetime = c.ConnMaxLifetime
+
+	return config, nil
+}
+
+// ReadReplicaConfig holds read replica configuration
+type ReadReplicaConfig struct {
+	Host     string
+	Port     int
+	User     string
+	Password string
+	Database string
+	SSLMode  string
+}
+
+// LoadReadReplicaConfig loads read replica configuration
+func LoadReadReplicaConfig() *ReadReplicaConfig {
+	return &ReadReplicaConfig{
+		Host:     getEnv("DB_REPLICA_HOST", ""),
+		Port:     getIntEnv("DB_REPLICA_PORT", 5432),
+		User:     getEnv("DB_REPLICA_USER", ""),
+		Password: getEnv("DB_REPLICA_PASSWORD", ""),
+		Database: getEnv("DB_REPLICA_NAME", ""),
+		SSLMode:  getEnv("DB_REPLICA_SSLMODE", "disable"),
+	}
+}
+
+func getEnv(key, defaultValue string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return defaultValue
+}
+
+func getIntEnv(key string, defaultValue int) int {
+	if value := os.Getenv(key); value != "" {
+		if intValue, err := strconv.Atoi(value); err == nil {
+			return intValue
+		}
+	}
+	return defaultValue
+}