Refactor everything again

internal/config/config.go

@@ -0,0 +1,54 @@
+package config
+
+import (
+	"encoding/json"
+	"log/slog"
+	"os"
+)
+
+// Config stores app configuration
+type Config struct {
+	Port       int    `json:"port"`
+	KeyFile    string `json:"key-file"`
+	SQLiteFile string `json:"sqlite-file"`
+	LogToFile  bool   `json:"log-to-file"`
+	LogFile    string `json:"log-file"`
+}
+
+var DefaultConfig = Config{
+	Port:       7102,
+	KeyFile:    "private.key",
+	SQLiteFile: "data.db",
+	LogToFile:  false,
+	LogFile:    "pye.log",
+}
+
+var (
+	DefaultLocation = "config.json"
+	Cfg             Config
+)
+
+// Load parses a JSON-formatted configuration file
+func load(filename string) (Config, error) {
+	data, err := os.ReadFile(filename)
+	if err != nil {
+		return Config{}, err
+	}
+	conf := DefaultConfig
+	err = json.Unmarshal(data, &conf)
+	if err != nil {
+		return Config{}, err
+	}
+	slog.Debug("Loaded config", "file", filename, "config", conf)
+	return conf, nil
+}
+
+// MustLoad handles initial configuration loading
+func MustLoad(filename string) {
+	conf, err := load(filename)
+	if err != nil {
+		slog.Error("error initially loading config", "error", err)
+		os.Exit(1)
+	}
+	Cfg = conf
+}