70 lines
2.0 KiB
Go
70 lines
2.0 KiB
Go
package config
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import (
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"fmt"
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"os"
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"github.com/joho/godotenv"
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)
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// Config holds all configuration values for the application.
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// Each field maps to an environment variable defined in .env.
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type Config struct {
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// Server settings
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Port string // PORT — the port the HTTP server listens on
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Environment string // ENVIRONMENT — dev, stage, or prod
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// Database settings
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DBHost string // DB_HOST
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DBPort string // DB_PORT
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DBUser string // DB_USER
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DBPassword string // DB_PASSWORD
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DBName string // DB_NAME
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DBSSLMode string // DB_SSLMODE
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}
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// LoadConfig reads the .env file and returns a populated Config struct.
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// It returns an error if the .env file is missing or a required variable is empty.
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func LoadConfig() (*Config, error) {
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// Load .env file into environment variables
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err := godotenv.Load()
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if err != nil {
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return nil, fmt.Errorf("error loading .env file: %w", err)
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}
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// Build the config from environment variables
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cfg := &Config{
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Port: getEnv("PORT", "4000"),
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Environment: getEnv("ENVIRONMENT", "dev"),
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DBHost: getEnv("DB_HOST", ""),
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DBPort: getEnv("DB_PORT", "5432"),
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DBUser: getEnv("DB_USER", ""),
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DBPassword: getEnv("DB_PASSWORD", ""),
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DBName: getEnv("DB_NAME", ""),
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DBSSLMode: getEnv("DB_SSLMODE", "disable"),
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}
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// Validate that critical database fields are not empty
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if cfg.DBHost == "" || cfg.DBUser == "" || cfg.DBPassword == "" || cfg.DBName == "" {
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return nil, fmt.Errorf("missing required database configuration (DB_HOST, DB_USER, DB_PASSWORD, or DB_NAME)")
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}
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return cfg, nil
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}
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// DatabaseURL builds a PostgreSQL connection string from the config fields.
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func (c *Config) DatabaseURL() string {
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return fmt.Sprintf(
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"postgres://%s:%s@%s:%s/%s?sslmode=%s",
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c.DBUser, c.DBPassword, c.DBHost, c.DBPort, c.DBName, c.DBSSLMode,
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)
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}
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// getEnv reads an environment variable or returns a default value.
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func getEnv(key, defaultValue string) string {
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value := os.Getenv(key)
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if value == "" {
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return defaultValue
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}
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return value
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} |