🎉 first commit

app/config/.env.example

@@ -0,0 +1,10 @@
+DB=postgres
+POSTGRES_USER=
+POSTGRES_PASSWORD=
+POSTGRES_DB=
+POSTGRES_HOST=ohmyurl-postgresql
+POSTGRES_PORT=5432
+LISTEN_PORT_CREATE=8080
+LISTEN_PORT_FORWARD=8081
+FORWARD_DOMAIN=http://localhost/
+CREATE_DOMAIN=http://127.0.0.1

app/config/settings.go

@@ -0,0 +1,78 @@
+package config
+
+import (
+	"os"
+	"strings"
+)
+
+type DBName string
+
+const (
+	Postgres  DBName = "postgres"
+	MongoDB   DBName = "mongodb"
+	Cassandra DBName = "cassandra"
+)
+
+type AppConfig struct {
+	LISTEN_PORT_CREATE  string
+	LISTEN_PORT_FORWARD string
+	FORWARD_DOMAIN      string
+	CREATE_DOMAIN       string
+}
+
+type PostgresConfig struct {
+	USER     string
+	PASSWORD string
+	HOST     string
+	PORT     string
+	DBNAME   string
+}
+
+func GetAppConfig() *AppConfig {
+	return &AppConfig{
+		LISTEN_PORT_CREATE:  GetEnvOrPanic("LISTEN_PORT_CREATE"),
+		LISTEN_PORT_FORWARD: GetEnvOrPanic("LISTEN_PORT_FORWARD"),
+		FORWARD_DOMAIN:      GetEnvOrPanic("FORWARD_DOMAIN"),
+		CREATE_DOMAIN:       GetEnvOrPanic("CREATE_DOMAIN"),
+	}
+}
+
+func GetPostgresConfig() *PostgresConfig {
+	return &PostgresConfig{
+		USER:     GetEnvOrPanic("POSTGRES_USER"),
+		PASSWORD: GetEnvOrPanic("POSTGRES_PASSWORD"),
+		HOST:     GetEnvOrPanic("POSTGRES_HOST"),
+		PORT:     GetEnvOrDefault("POSTGRES_PORT", "5432"),
+		DBNAME:   GetEnvOrPanic("POSTGRES_DB"),
+	}
+}
+
+func GetDB() DBName {
+	dbName := strings.ToLower(GetEnvOrPanic("DB"))
+	switch dbName {
+	case "postgres":
+		return Postgres
+	case "mongodb":
+		return MongoDB
+	case "cassandra":
+		return Cassandra
+	default:
+		panic("Unknown database")
+	}
+}
+
+func GetEnvOrDefault(key, defaultValue string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		return defaultValue
+	}
+	return value
+}
+
+func GetEnvOrPanic(key string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		panic("Environment variable " + key + " is not set")
+	}
+	return value
+}