first commit

internal/session/session.go

@@ -0,0 +1,98 @@
+package session
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+type Data struct {
+	Spotify SpotifyState      `json:"spotify"`
+	Qobuz   QobuzState        `json:"qobuz"`
+	Monitor map[string]string `json:"monitor"`
+	Meta    map[string]string `json:"meta,omitempty"`
+}
+
+type SpotifyState struct {
+	ClientID     string    `json:"client_id,omitempty"`
+	AccessToken  string    `json:"access_token,omitempty"`
+	RefreshToken string    `json:"refresh_token,omitempty"`
+	ExpiresAt    time.Time `json:"expires_at,omitempty"`
+	Scope        string    `json:"scope,omitempty"`
+}
+
+type QobuzState struct {
+	Username    string `json:"username,omitempty"`
+	Password    string `json:"password,omitempty"`
+	AccessToken string `json:"access_token,omitempty"`
+}
+
+func DefaultPath() string {
+	home, err := os.UserHomeDir()
+	if err != nil || strings.TrimSpace(home) == "" {
+		return ".qtransfer-session.json"
+	}
+	return filepath.Join(home, ".config", "qtransfer", "session.json")
+}
+
+func ResolvePath(path string) string {
+	path = strings.TrimSpace(path)
+	if path == "" {
+		return DefaultPath()
+	}
+	if path == "~" {
+		return DefaultPath()
+	}
+	if strings.HasPrefix(path, "~/") {
+		home, err := os.UserHomeDir()
+		if err == nil && home != "" {
+			return filepath.Join(home, path[2:])
+		}
+	}
+	return path
+}
+
+func Load(path string) (Data, error) {
+	path = ResolvePath(path)
+	b, err := os.ReadFile(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return Data{}, nil
+		}
+		return Data{}, err
+	}
+
+	var d Data
+	if err := json.Unmarshal(b, &d); err != nil {
+		return Data{}, fmt.Errorf("parse session file: %w", err)
+	}
+	if d.Monitor == nil {
+		d.Monitor = map[string]string{}
+	}
+	return d, nil
+}
+
+func Save(path string, data Data) error {
+	path = ResolvePath(path)
+	dir := filepath.Dir(path)
+	if err := os.MkdirAll(dir, 0o700); err != nil {
+		return fmt.Errorf("create session directory: %w", err)
+	}
+
+	b, err := json.MarshalIndent(data, "", "  ")
+	if err != nil {
+		return fmt.Errorf("encode session: %w", err)
+	}
+
+	tmp := path + ".tmp"
+	if err := os.WriteFile(tmp, b, 0o600); err != nil {
+		return fmt.Errorf("write session temp file: %w", err)
+	}
+	if err := os.Rename(tmp, path); err != nil {
+		return fmt.Errorf("replace session file: %w", err)
+	}
+	return nil
+}