Initial scaffold: project structure, .gitignore, go.mod

internal/config/config.go

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+package config
+
+import (
+	"encoding/json"
+	"os"
+	"sync"
+)
+
+// Config holds SyncWarden configuration.
+type Config struct {
+	// Connection
+	SyncthingAddress string `json:"syncthing_address"`
+	SyncthingAPIKey  string `json:"syncthing_api_key"`
+	SyncthingUseTLS  bool   `json:"syncthing_use_tls"`
+
+	// Feature toggles
+	EnableNotifications  bool `json:"enable_notifications"`
+	EnableRecentFiles    bool `json:"enable_recent_files"`
+	EnableConflictAlerts bool `json:"enable_conflict_alerts"`
+	EnableTransferRate   bool `json:"enable_transfer_rate"`
+	AutoStartSyncthing   bool `json:"auto_start_syncthing"`
+	StartOnLogin         bool `json:"start_on_login"`
+
+	// Per-event notification toggles
+	NotifySyncComplete     bool `json:"notify_sync_complete"`
+	NotifyDeviceConnect    bool `json:"notify_device_connect"`
+	NotifyDeviceDisconnect bool `json:"notify_device_disconnect"`
+	NotifyNewDevice        bool `json:"notify_new_device"`
+	NotifyConflict         bool `json:"notify_conflict"`
+
+	// Persisted state
+	LastEventID int `json:"last_event_id"`
+}
+
+var defaults = Config{
+	SyncthingAddress:     "localhost:8384",
+	SyncthingAPIKey:      "",
+	SyncthingUseTLS:      false,
+	EnableNotifications:  true,
+	EnableRecentFiles:    true,
+	EnableConflictAlerts: true,
+	EnableTransferRate:   true,
+	AutoStartSyncthing:   false,
+	StartOnLogin:         false,
+	NotifySyncComplete:     true,
+	NotifyDeviceConnect:    false,
+	NotifyDeviceDisconnect: true,
+	NotifyNewDevice:        true,
+	NotifyConflict:         true,
+	LastEventID:            0,
+}
+
+var (
+	mu       sync.Mutex
+	cached   *Config
+)
+
+// Load reads config from disk, merging with defaults.
+func Load() Config {
+	mu.Lock()
+	defer mu.Unlock()
+
+	cfg := defaults
+	data, err := os.ReadFile(ConfigPath())
+	if err != nil {
+		return cfg
+	}
+	_ = json.Unmarshal(data, &cfg)
+	cached = &cfg
+	return cfg
+}
+
+// Save writes config to disk.
+func Save(cfg Config) error {
+	mu.Lock()
+	defer mu.Unlock()
+
+	dir := ConfigDir()
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		return err
+	}
+	data, err := json.MarshalIndent(cfg, "", "  ")
+	if err != nil {
+		return err
+	}
+	cached = &cfg
+	return os.WriteFile(ConfigPath(), data, 0o644)
+}
+
+// BaseURL returns the full Syncthing base URL.
+func (c Config) BaseURL() string {
+	scheme := "http"
+	if c.SyncthingUseTLS {
+		scheme = "https"
+	}
+	return scheme + "://" + c.SyncthingAddress
+}

internal/config/paths.go

@@ -0,0 +1,8 @@
+package config
+
+import "path/filepath"
+
+// ConfigPath returns the path to config.json.
+func ConfigPath() string {
+	return filepath.Join(ConfigDir(), "config.json")
+}

internal/config/paths_darwin.go

@@ -0,0 +1,20 @@
+//go:build darwin
+
+package config
+
+import (
+	"os"
+	"path/filepath"
+)
+
+// ConfigDir returns ~/Library/Application Support/syncwarden.
+func ConfigDir() string {
+	home, _ := os.UserHomeDir()
+	return filepath.Join(home, "Library", "Application Support", "syncwarden")
+}
+
+// SyncthingConfigPath returns the default Syncthing config.xml path on macOS.
+func SyncthingConfigPath() string {
+	home, _ := os.UserHomeDir()
+	return filepath.Join(home, "Library", "Application Support", "Syncthing", "config.xml")
+}

internal/config/paths_linux.go

@@ -0,0 +1,26 @@
+//go:build linux
+
+package config
+
+import (
+	"os"
+	"path/filepath"
+)
+
+// ConfigDir returns ~/.config/syncwarden.
+func ConfigDir() string {
+	if xdg := os.Getenv("XDG_CONFIG_HOME"); xdg != "" {
+		return filepath.Join(xdg, "syncwarden")
+	}
+	home, _ := os.UserHomeDir()
+	return filepath.Join(home, ".config", "syncwarden")
+}
+
+// SyncthingConfigPath returns the default Syncthing config.xml path on Linux.
+func SyncthingConfigPath() string {
+	if xdg := os.Getenv("XDG_CONFIG_HOME"); xdg != "" {
+		return filepath.Join(xdg, "syncthing", "config.xml")
+	}
+	home, _ := os.UserHomeDir()
+	return filepath.Join(home, ".config", "syncthing", "config.xml")
+}

internal/config/paths_windows.go

@@ -0,0 +1,18 @@
+//go:build windows
+
+package config
+
+import (
+	"os"
+	"path/filepath"
+)
+
+// ConfigDir returns %LOCALAPPDATA%\syncwarden.
+func ConfigDir() string {
+	return filepath.Join(os.Getenv("LOCALAPPDATA"), "syncwarden")
+}
+
+// SyncthingConfigPath returns the default Syncthing config.xml path on Windows.
+func SyncthingConfigPath() string {
+	return filepath.Join(os.Getenv("LOCALAPPDATA"), "Syncthing", "config.xml")
+}