Basic REST app

internal/config/config.go

@@ -0,0 +1,80 @@
+package config
+
+import (
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+type GlobalConfig struct {
+	Token       string `yaml:"token"`
+	GithubPat   string `yaml:"github_pat"`
+	StoragePath string `yaml:"storage_path"`
+}
+
+type SiteConfig struct {
+	Repo   string `yaml:"repo"`
+	Owner  string `yaml:"owner"`
+	Branch string `yaml:"branch"`
+	Domain string `yaml:"domain"`
+}
+
+type Config struct {
+	Global GlobalConfig `yaml:"global"`
+	Sites  []SiteConfig `yaml:"sites"`
+}
+
+type Error struct {
+	Field   string
+	Message string
+}
+
+func (c Error) Error() string {
+	return "Config error: " + c.Field + " - " + c.Message
+}
+
+func validateConfig(config *Config) error {
+	if config.Global.Token == "" {
+		return &Error{Field: "global.token", Message: "Token is required"}
+	}
+	if config.Global.GithubPat == "" {
+		return &Error{Field: "global.github_pat", Message: "GitHub PAT is required"}
+	}
+	if config.Global.StoragePath == "" {
+		return &Error{Field: "global.storage_path", Message: "Storage path is required"}
+	}
+	for i, site := range config.Sites {
+		if site.Repo == "" {
+			return &Error{Field: "sites[" + string(i) + "].repo", Message: "Repo is required"}
+		}
+		if site.Owner == "" {
+			return &Error{Field: "sites[" + string(i) + "].owner", Message: "Owner is required"}
+		}
+		if site.Branch == "" {
+			return &Error{Field: "sites[" + string(i) + "].branch", Message: "Branch is required"}
+		}
+		if site.Domain == "" {
+			return &Error{Field: "sites[" + string(i) + "].domain", Message: "Domain is required"}
+		}
+	}
+	return nil
+}
+
+func Load(path string) (*Config, error) {
+	f, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	expanded := os.Expand(string(f), os.Getenv)
+	var config Config
+	err = yaml.Unmarshal([]byte(expanded), &config)
+	if err != nil {
+		return nil, err
+	}
+
+	err = validateConfig(&config)
+	if err != nil {
+		return nil, err
+	}
+	return &config, nil
+}