Добавил логи

internal/qbt/qbt.go

@@ -12,6 +12,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"log/slog"
 	"mime/multipart"
 	"net/http"
 	"net/http/cookiejar"
@@ -36,6 +37,7 @@ type Client struct {
 	hc   *http.Client
 	user string
 	pass string
+	log  *slog.Logger
 	mu   sync.Mutex // сериализует логин
 }
 
@@ -74,8 +76,8 @@ type AddRequest struct {
 	Paused   bool
 }
 
-// New создаёт клиент с собственным cookie-jar.
-func New(cfg Config) (*Client, error) {
+// New создаёт клиент с собственным cookie-jar. logger nil → slog.Default().
+func New(cfg Config, logger *slog.Logger) (*Client, error) {
 	base, err := url.Parse(strings.TrimRight(cfg.URL, "/"))
 	if err != nil {
 		return nil, fmt.Errorf("parse qbittorrent url %q: %w", cfg.URL, err)
@@ -88,11 +90,15 @@ func New(cfg Config) (*Client, error) {
 	if timeout == 0 {
 		timeout = 30 * time.Second
 	}
+	if logger == nil {
+		logger = slog.Default()
+	}
 	return &Client{
 		base: base,
 		hc:   &http.Client{Jar: jar, Timeout: timeout},
 		user: cfg.Username,
 		pass: cfg.Password,
+		log:  logger,
 	}, nil
 }
 
@@ -119,9 +125,12 @@ func (c *Client) login(ctx context.Context) error {
 	defer func() { _ = resp.Body.Close() }()
 	body, _ := io.ReadAll(io.LimitReader(resp.Body, 1<<10))
 	if resp.StatusCode != http.StatusOK || strings.TrimSpace(string(body)) != "Ok." {
+		c.log.Error("qbittorrent: login failed",
+			"status", resp.StatusCode, "body", strings.TrimSpace(string(body)))
 		return fmt.Errorf("qbittorrent login failed: status %d body %q",
 			resp.StatusCode, strings.TrimSpace(string(body)))
 	}
+	c.log.Debug("qbittorrent: login ok", "user", c.user)
 	return nil
 }
 
@@ -138,6 +147,7 @@ func (c *Client) do(ctx context.Context, build func() (*http.Request, error)) (*
 	}
 	if resp.StatusCode == http.StatusForbidden {
 		_ = resp.Body.Close()
+		c.log.Debug("qbittorrent: session expired (403), re-login")
 		if err := c.login(ctx); err != nil {
 			return nil, err
 		}
@@ -199,8 +209,13 @@ func (c *Client) Add(ctx context.Context, ar AddRequest) error {
 			resp.StatusCode, strings.TrimSpace(string(body)))
 	}
 	if strings.TrimSpace(string(body)) == "Fails." {
+		c.log.Error("qbittorrent: add rejected",
+			"category", ar.Category, "urls", len(ar.URLs), "torrents", len(ar.Torrents))
 		return fmt.Errorf("qbittorrent add: rejected (Fails.)")
 	}
+	c.log.Info("qbittorrent: torrent added",
+		"category", ar.Category, "save_path", ar.SavePath,
+		"urls", len(ar.URLs), "torrents", len(ar.Torrents), "paused", ar.Paused)
 	return nil
 }
 
@@ -226,6 +241,7 @@ func (c *Client) Torrents(ctx context.Context, category string) ([]Torrent, erro
 	if err := json.NewDecoder(resp.Body).Decode(&ts); err != nil {
 		return nil, fmt.Errorf("decode qbittorrent info: %w", err)
 	}
+	c.log.Debug("qbittorrent: torrents fetched", "category", category, "count", len(ts))
 	return ts, nil
 }
 
@@ -250,5 +266,6 @@ func (c *Client) Files(ctx context.Context, hash string) ([]File, error) {
 	if err := json.NewDecoder(resp.Body).Decode(&fs); err != nil {
 		return nil, fmt.Errorf("decode qbittorrent files: %w", err)
 	}
+	c.log.Debug("qbittorrent: files fetched", "hash", hash, "count", len(fs))
 	return fs, nil
 }

internal/qbt/qbt_test.go

@@ -62,7 +62,7 @@ func fakeQBittorrent(t *testing.T, info string) *httptest.Server {
 
 func newClient(t *testing.T, url string) *Client {
 	t.Helper()
-	c, err := New(Config{URL: url, Username: "admin", Password: "secret"})
+	c, err := New(Config{URL: url, Username: "admin", Password: "secret"}, nil)
 	if err != nil {
 		t.Fatalf("New: %v", err)
 	}
@@ -107,7 +107,7 @@ func TestTorrents(t *testing.T) {
 
 func TestLoginFailure(t *testing.T) {
 	srv := fakeQBittorrent(t, "[]")
-	c, err := New(Config{URL: srv.URL, Username: "admin", Password: "wrong"})
+	c, err := New(Config{URL: srv.URL, Username: "admin", Password: "wrong"}, nil)
 	if err != nil {
 		t.Fatal(err)
 	}