fake-smtp/internal/config/config.go

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2020-04-17 17:53:01 +02:00
package config
import (
"io"
"io/ioutil"
"time"
"github.com/caarlos0/env/v6"
"github.com/pkg/errors"
"gopkg.in/yaml.v2"
)
type Config struct {
HTTP HTTPConfig `yaml:"http"`
SMTP SMTPConfig `yaml:"smtp"`
Data DataConfig `ymal:"data"`
}
type HTTPConfig struct {
Address string `yaml:"address" env:"FAKESMTP_HTTP_ADDRESS"`
TemplateDir string `yaml:"templateDir" env:"FAKESMTP_HTTP_TEMPLATEDIR"`
PublicDir string `yaml:"publicDir" env:"FAKESMTP_HTTP_PUBLICDIR"`
}
type SMTPConfig struct {
Address string `yaml:"address" env:"FAKESMTP_SMTP_ADDRESS"`
Username string `yaml:"username" env:"FAKESMTP_SMTP_USERNAME"`
Password string `yaml:"password" env:"FAKESMTP_SMTP_PASSWORD"`
Domain string `yaml:"domain" env:"FAKESMTP_SMTP_DOMAIN"`
ReadTimeout time.Duration `yaml:"readTimeout" env:"FAKESMTP_SMTP_READTIMEOUT"`
WriteTimeout time.Duration `yaml:"writeTimeout" env:"FAKESMTP_SMTP_WRITETIMEOUT"`
MaxMessageBytes int `yaml:"maxMessageBytes" env:"FAKESMTP_SMTP_MAXMESSAGEBYTES"`
MaxRecipients int `yaml:"maxRecipients" env:"FAKESMTP_SMTP_MAXRECIPIENTS"`
AllowInsecureAuth bool `yaml:"allowInsecureAuth" env:"FAKESMTP_SMTP_ALLOWINSECUREAUTH"`
Debug bool `yaml:"debug" env:"FAKESMTP_SMTP_DEBUG"`
}
type DataConfig struct {
Path string `yaml:"path" env:"FAKESMTP_DATA_PATH"`
}
// NewFromFile retrieves the configuration from the given file
func NewFromFile(filepath string) (*Config, error) {
config := NewDefault()
data, err := ioutil.ReadFile(filepath)
if err != nil {
return nil, errors.Wrapf(err, "could not read file '%s'", filepath)
}
if err := yaml.Unmarshal(data, config); err != nil {
return nil, errors.Wrapf(err, "could not unmarshal configuration")
}
return config, nil
}
func WithEnvironment(conf *Config) error {
if err := env.Parse(conf); err != nil {
return err
}
return nil
}
func NewDumpDefault() *Config {
config := NewDefault()
return config
}
func NewDefault() *Config {
return &Config{
HTTP: HTTPConfig{
Address: ":8080",
TemplateDir: "template",
PublicDir: "public",
},
SMTP: SMTPConfig{
Address: ":2525",
Username: "",
Password: "",
Domain: "localhost",
ReadTimeout: 30 * time.Second,
WriteTimeout: 30 * time.Second,
MaxMessageBytes: 1024 * 1024,
MaxRecipients: 50,
AllowInsecureAuth: true,
Debug: true,
},
Data: DataConfig{
Path: "fakesmtp.db",
},
}
}
func Dump(config *Config, w io.Writer) error {
data, err := yaml.Marshal(config)
if err != nil {
return errors.Wrap(err, "could not dump config")
}
if _, err := w.Write(data); err != nil {
return err
}
return nil
}