init project

internal/config/config.go

@@ -0,0 +1,72 @@
+package config
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+type Config struct {
+	ForgejoInstanceURL string `json:"forgejo_instance_url"`
+}
+
+// Load tries to load a saved configuration.
+func Load(path string) (*Config, error) {
+	var err error
+	if path == "" {
+		path, err = getUserConfigDir()
+		if err != nil {
+			return nil, fmt.Errorf("failed to load config: %w", err)
+		}
+	}
+
+	if _, err := os.Stat(path); os.IsNotExist(err) {
+		return &Config{}, nil
+	}
+
+	fileData, err := os.ReadFile(path)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read config file: %w", err)
+	}
+
+	var cfg Config
+	err = json.Unmarshal(fileData, &cfg)
+	if err != nil {
+		return nil, fmt.Errorf("failed to unmarshal config file: %w", err)
+	}
+
+	return &cfg, nil
+}
+
+func (cfg *Config) Save(path string) error {
+	var err error
+	if path == "" {
+		path, err = getUserConfigDir()
+		if err != nil {
+			return fmt.Errorf("failed to save config: %w", err)
+		}
+	}
+
+	fileData, err := json.MarshalIndent(cfg, "", "  ")
+	if err != nil {
+		return fmt.Errorf("failed to marshal config: %w", err)
+	}
+
+	err = os.WriteFile(path, fileData, 0600)
+	if err != nil {
+		return fmt.Errorf("failed to write config file: %w", err)
+	}
+
+	return nil
+}
+
+// getUserConfigDir creates the full path to the config file.
+func getUserConfigDir() (string, error) {
+	userConfigPath, err := os.UserConfigDir()
+	if err != nil {
+		return "", fmt.Errorf("failed to get user configuration path: %w", err)
+	}
+	filename := filepath.Join(userConfigPath, "forgejo-cli", "config.json")
+	return filename, nil
+}