config.go

package config

import (
	"encoding/json"
	"os"

	"gitlab.com/uafrica/go-utils/errors"
	"gitlab.com/uafrica/go-utils/logger"
)

func MustGetOrDefault(valuePtr interface{}, name string) {
	//update value if defined
	envValueStr := os.Getenv(name)
	if envValueStr != "" {
		if err := json.Unmarshal([]byte(envValueStr), valuePtr); err != nil {
			if err := json.Unmarshal([]byte("\""+envValueStr+"\""), valuePtr); err != nil {
				panic(errors.Errorf("cannot parse environment %s=%s into %T", name, envValueStr, valuePtr))
			}
		}
		logger.Debugf("CONFIG: Set %s=%s", name, envValueStr)
	}

	if validator, ok := valuePtr.(Validator); ok {
		if err := validator.Validate(); err != nil {
			panic(errors.Errorf("Invalid %s=(%T)%+v", name, valuePtr, valuePtr))
		}
		logger.Debugf("CONFIG: Validated %s", name)
	}

	logger.Debugf("CONFIG: %s=(%T)%+v", name, valuePtr, valuePtr)
}

type Validator interface {
	Validate() error
}