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path: root/internal/config/config.go
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package config

import (
	"io/fs"
	"log/slog"
	"net/url"
	"os"

	"github.com/BurntSushi/toml"
	"github.com/pkg/errors"
)

type Taxonomy struct {
	Name string
	Feed bool
}

type MenuItem struct {
	Name string
	URL  string `toml:"url"`
}

type URL struct {
	*url.URL
}

func (u *URL) UnmarshalText(text []byte) (err error) {
	u.URL, err = url.Parse(string(text))
	return err
}

type Config struct {
	DefaultLanguage  string `toml:"default_language"`
	BaseURL          URL    `toml:"base_url"`
	InjectLiveReload bool
	Title            string
	Email            string
	Description      string
	DomainStartDate  string `toml:"domain_start_date"`
	OriginalDomain   string `toml:"original_domain"`
	Taxonomies       []Taxonomy
	CSP              *CSP `toml:"content-security-policy"`
	Extra            struct {
		Headers map[string]string
	}
	Menus map[string][]MenuItem
}

func getEnvFallback(key, fallback string) string {
	if value, ok := os.LookupEnv(key); ok {
		return value
	} else {
		return fallback
	}
}

func GetConfig() (*Config, error) {
	config := Config{}
	slog.Debug("reading config.toml")
	_, err := toml.DecodeFile("config.toml", &config)
	if err != nil {
		var pathError *fs.PathError
		var tomlError toml.ParseError
		if errors.As(err, &pathError) {
			return nil, errors.WithMessage(err, "could not read configuration")
		} else if errors.As(err, &tomlError) {
			return nil, errors.WithMessage(err, tomlError.ErrorWithUsage())
		} else {
			return nil, errors.Wrap(err, "config error")
		}
	}
	return &config, nil
}