zrokdir/config (#136)

zrokdir/config.go

@@ -0,0 +1,61 @@
+package zrokdir
+
+import (
+	"encoding/json"
+	"github.com/pkg/errors"
+	"os"
+	"path/filepath"
+)
+
+type Config struct {
+	ApiEndpoint string `json:"api_endpoint"`
+}
+
+func HasConfig() (bool, error) {
+	cf, err := configFile()
+	if err != nil {
+		return false, errors.Wrap(err, "error getting config file path")
+	}
+	_, err = os.Stat(cf)
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	if err != nil {
+		return false, errors.Wrapf(err, "error stat-ing config file '%v'", cf)
+	}
+	return true, nil
+}
+
+func LoadConfig() (*Config, error) {
+	cf, err := configFile()
+	if err != nil {
+		return nil, errors.Wrap(err, "error getting config file path")
+	}
+	data, err := os.ReadFile(cf)
+	if err != nil {
+		return nil, errors.Wrapf(err, "error reading config file '%v'", cf)
+	}
+	cfg := &Config{}
+	if err := json.Unmarshal(data, cfg); err != nil {
+		return nil, errors.Wrapf(err, "error unmarshaling config file '%v'", cf)
+	}
+	return cfg, nil
+}
+
+func SaveConfig(cfg *Config) error {
+	data, err := json.MarshalIndent(cfg, "", "  ")
+	if err != nil {
+		return errors.Wrap(err, "error marshaling config")
+	}
+	cf, err := configFile()
+	if err != nil {
+		return errors.Wrap(err, "error getting config file path")
+	}
+	if err := os.MkdirAll(filepath.Dir(cf), os.FileMode(0700)); err != nil {
+		return errors.Wrapf(err, "error creating zrokdir path '%v'", filepath.Dir(cf))
+	}
+	if err := os.WriteFile(cf, data, os.FileMode(0600)); err != nil {
+		return errors.Wrap(err, "error saving config file")
+	}
+	return nil
+}

zrokdir/zrokdir.go

@@ -5,6 +5,14 @@ import (
 	"path/filepath"
 )
 
+func configFile() (string, error) {
+	zrd, err := zrokDir()
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(zrd, "config.json"), nil
+}
+
 func environmentFile() (string, error) {
 	zrd, err := zrokDir()
 	if err != nil {