chore: parametrize port and prometheus #181

types/server_settings.go

@@ -0,0 +1,91 @@
+package types
+
+import (
+	"log"
+	"log/slog"
+)
+
+type ServerSettings struct {
+	Port              string
+	PrometheusEnabled bool
+
+	BaseUrl     string
+	Environment string
+	DbPath      string
+	Smtp        *SmtpSettings
+}
+
+type SmtpSettings struct {
+	Host     string
+	Port     string
+	User     string
+	Pass     string
+	FromMail string
+	FromName string
+}
+
+func NewServerSettingsFromEnv(env func(string) string) *ServerSettings {
+
+	var smtp *SmtpSettings
+	if env("SMTP_ENABLED") == "true" {
+		smtp = &SmtpSettings{
+			Host:     env("SMTP_HOST"),
+			Port:     env("SMTP_PORT"),
+			User:     env("SMTP_USER"),
+			Pass:     env("SMTP_PASS"),
+			FromMail: env("SMTP_FROM_MAIL"),
+			FromName: env("SMTP_FROM_NAME"),
+		}
+
+		if smtp.Host == "" {
+			log.Fatal("SMTP_HOST must be set")
+		}
+		if smtp.Port == "" {
+			log.Fatal("SMTP_PORT must be set")
+		}
+		if smtp.User == "" {
+			log.Fatal("SMTP_USER must be set")
+		}
+		if smtp.Pass == "" {
+			log.Fatal("SMTP_PASS must be set")
+		}
+		if smtp.FromMail == "" {
+			log.Fatal("SMTP_FROM_MAIL must be set")
+		}
+		if smtp.FromName == "" {
+			log.Fatal("SMTP_FROM_NAME must be set")
+		}
+	}
+
+	settings := &ServerSettings{
+		Port:              env("PORT"),
+		PrometheusEnabled: env("PROMETHEUS_ENABLED") == "true",
+		BaseUrl:           env("BASE_URL"),
+		DbPath:            env("DB_PATH"),
+		Environment:       env("ENVIRONMENT"),
+		Smtp:              smtp,
+	}
+
+	if settings.DbPath == "" {
+		settings.DbPath = "./data.db"
+	}
+
+	if settings.BaseUrl == "" {
+		log.Fatal("BASE_URL must be set")
+	}
+	if settings.Port == "" {
+		log.Fatal("PORT must be set")
+	}
+	if settings.Environment == "" {
+		log.Fatal("ENVIRONMENT must be set")
+	}
+
+	if settings.Environment == "prod" && (settings.Smtp == nil || !settings.PrometheusEnabled) {
+		log.Fatal("SMTP and Prometheus must be enabled in production")
+	}
+
+	slog.Info("BASE_URL is " + settings.BaseUrl)
+	slog.Info("ENVIRONMENT is " + settings.Environment)
+
+	return settings
+}