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|
package service
import (
"encoding/json"
"fmt"
"os"
"time"
"dario.cat/mergo"
)
type Duration struct {
time.Duration
}
func (s Duration) MarshalJSON() ([]byte, error) {
return json.Marshal(s.Duration.String())
}
func (s *Duration) UnmarshalJSON(data []byte) error {
var str string
err := json.Unmarshal(data, &str)
if err != nil {
return err
}
v, err := time.ParseDuration(str)
if err != nil {
return err
}
*s = Duration{v}
return nil
}
type Config struct {
MaxInterval Duration `json:"max-interval,omitempty"`
MinInterval Duration `json:"min-interval,omitempty"`
Mirrors []*Mirror `json:"mirrors,omitempty"`
}
var DefaultConfig = Config{
MaxInterval: Duration{24 * time.Hour},
MinInterval: Duration{time.Hour},
}
func (c *Config) Apply(arg Config) {
err := mergo.Merge(c, &arg)
if err != nil {
panic(err)
}
}
// ApplyFileConfig loads the configuration described by the given yaml file.
func ApplyFileConfig(cfg *Config, filePath string) error {
var ret Config
f, err := os.Open(filePath)
if os.IsNotExist(err) {
return nil
} else if err != nil {
return err
}
defer f.Close()
err = json.NewDecoder(f).Decode(&ret)
if err != nil {
return fmt.Errorf("loading configuration file: %w", err)
}
cfg.Apply(ret)
return nil
}
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