first commit

internal/config/config.go

@@ -0,0 +1,54 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path"
+	"strings"
+
+	"github.com/go-yaml/yaml"
+)
+
+func LoadConfig(filePath string) (*Config, error) {
+	cfg := Config{}
+
+	isDefaultConfig := filePath == DefaultConfigPath
+
+	if strings.HasPrefix(filePath, "~") {
+		if v, ok := os.LookupEnv("HOME"); ok {
+			filePath = strings.Replace(filePath, "~", v, 1)
+		} else {
+			return nil, fmt.Errorf("$HOME not set in env")
+		}
+	}
+
+	if _, err := os.Stat(filePath); errors.Is(err, os.ErrNotExist) {
+		if isDefaultConfig {
+			dir, _ := path.Split(filePath)
+			err := os.MkdirAll(dir, os.ModePerm)
+			if err != nil {
+				return nil, err
+			}
+
+			err = os.WriteFile(filePath, []byte(DefaultConfig), 0644)
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		return &cfg, nil
+	}
+
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		return nil, err
+	}
+
+	err = yaml.Unmarshal([]byte(data), &cfg)
+	if err != nil {
+		return nil, err
+	}
+
+	return &cfg, nil
+}

internal/config/const.go

@@ -0,0 +1,15 @@
+package config
+
+const DefaultConfigPath = "~/.config/qmail/main.yaml"
+
+const DefaultConfig = `
+servers:
+
+# 	- name: s1
+# 	  host: localhost
+# 	  port: 587
+# 	  use-tls: true
+#	  auth:
+# 		login: login
+# 		password: password
+`

internal/config/struct.go

@@ -0,0 +1,24 @@
+package config
+
+type Auth struct {
+	Login    string `yaml:"login"`
+	Password string `yaml:"password"`
+}
+
+type Server struct {
+	Name string `yaml:"name"`
+
+	Host string `yaml:"host"`
+	Port uint16 `yaml:"port"`
+
+	From string `yaml:"from"`
+	To   string `yaml:"to"`
+
+	UseTLS bool `yaml:"use-tls"`
+
+	Auth *Auth `yaml:"auth"`
+}
+
+type Config struct {
+	Servers []Server
+}