pipu-music/services/api/internal/auth/handler.go

package auth

import (
	"context"
	"errors"
	"net/http"
	"time"

	"pipu/api/internal/api/gen"
	"pipu/api/internal/platform/apperr"
)

// RefreshCookie — имя cookie с refresh-токеном веб-клиента.
const RefreshCookie = "pipu_rt"

const refreshCookiePath = "/api/v1/auth"

// Handler реализует auth- и me-части gen.StrictServerInterface.
type Handler struct {
	svc          *Service
	cookieSecure bool
}

// NewHandler создаёт обработчик. cookieSecure = false допустим только для разработки по http.
func NewHandler(svc *Service, cookieSecure bool) *Handler {
	return &Handler{svc: svc, cookieSecure: cookieSecure}
}

func principal(ctx context.Context) (Principal, error) {
	p, ok := PrincipalFrom(ctx)
	if !ok {
		return Principal{}, apperr.Unauthorized(CodeUnauthorized, "not authenticated")
	}
	return p, nil
}

// Login реализует gen.StrictServerInterface.
func (h *Handler) Login(ctx context.Context, req gen.LoginRequestObject) (gen.LoginResponseObject, error) {
	in := LoginInput{
		Username:   req.Body.Username,
		Password:   req.Body.Password,
		ClientType: ClientType(req.Body.ClientType),
		IP:         clientIP(ctx),
	}
	if req.Body.DeviceName != nil {
		in.DeviceName = *req.Body.DeviceName
	}
	t, err := h.svc.Login(ctx, in)
	if err != nil {
		return nil, err
	}
	return gen.Login200JSONResponse(h.tokensDTO(ctx, t)), nil
}

// RefreshTokens реализует gen.StrictServerInterface.
func (h *Handler) RefreshTokens(ctx context.Context, req gen.RefreshTokensRequestObject) (gen.RefreshTokensResponseObject, error) {
	var token string
	if req.Body != nil && req.Body.RefreshToken != nil {
		token = *req.Body.RefreshToken
	} else if req.Params.PipuRt != nil {
		token = *req.Params.PipuRt
	}
	t, err := h.svc.Refresh(ctx, token)
	if err != nil {
		var ae *apperr.Error
		// Токен больше не годится — убираем cookie, чтобы браузер не присылал его снова.
		// При гонке двух вкладок cookie уже новая, её не трогаем.
		if req.Params.PipuRt != nil && errors.As(err, &ae) && ae.Code != CodeRefreshRace {
			h.clearCookie(ctx)
		}
		return nil, err
	}
	return gen.RefreshTokens200JSONResponse(h.tokensDTO(ctx, t)), nil
}

// Logout реализует gen.StrictServerInterface.
func (h *Handler) Logout(ctx context.Context, _ gen.LogoutRequestObject) (gen.LogoutResponseObject, error) {
	p, err := principal(ctx)
	if err != nil {
		return nil, err
	}
	if err := h.svc.Logout(ctx, p); err != nil {
		return nil, err
	}
	h.clearCookie(ctx)
	return gen.Logout204Response{}, nil
}

// LogoutAll реализует gen.StrictServerInterface.
func (h *Handler) LogoutAll(ctx context.Context, _ gen.LogoutAllRequestObject) (gen.LogoutAllResponseObject, error) {
	p, err := principal(ctx)
	if err != nil {
		return nil, err
	}
	if err := h.svc.LogoutAll(ctx, p); err != nil {
		return nil, err
	}
	h.clearCookie(ctx)
	return gen.LogoutAll204Response{}, nil
}

// GetMe реализует gen.StrictServerInterface.
func (h *Handler) GetMe(ctx context.Context, _ gen.GetMeRequestObject) (gen.GetMeResponseObject, error) {
	p, err := principal(ctx)
	if err != nil {
		return nil, err
	}
	u, err := h.svc.Me(ctx, p)
	if err != nil {
		return nil, err
	}
	return gen.GetMe200JSONResponse(MeDTO(u)), nil
}

// UpdateMe реализует gen.StrictServerInterface.
func (h *Handler) UpdateMe(ctx context.Context, req gen.UpdateMeRequestObject) (gen.UpdateMeResponseObject, error) {
	p, err := principal(ctx)
	if err != nil {
		return nil, err
	}
	patch := MePatch{DisplayName: req.Body.DisplayName, Locale: req.Body.Locale}
	if req.Body.UiPrefs != nil {
		prefs := uiPrefsFromDTO(*req.Body.UiPrefs)
		patch.UIPrefs = &prefs
	}
	u, err := h.svc.UpdateMe(ctx, p, patch)
	if err != nil {
		return nil, err
	}
	return gen.UpdateMe200JSONResponse(MeDTO(u)), nil
}

// ChangePassword реализует gen.StrictServerInterface.
func (h *Handler) ChangePassword(ctx context.Context, req gen.ChangePasswordRequestObject) (gen.ChangePasswordResponseObject, error) {
	p, err := principal(ctx)
	if err != nil {
		return nil, err
	}
	t, err := h.svc.ChangePassword(ctx, p, req.Body.CurrentPassword, req.Body.NewPassword)
	if err != nil {
		return nil, err
	}
	return gen.ChangePassword200JSONResponse(h.tokensDTO(ctx, t)), nil
}

// SetBootstrapCredentials реализует gen.StrictServerInterface.
func (h *Handler) SetBootstrapCredentials(ctx context.Context, req gen.SetBootstrapCredentialsRequestObject) (gen.SetBootstrapCredentialsResponseObject, error) {
	p, err := principal(ctx)
	if err != nil {
		return nil, err
	}
	t, err := h.svc.SetBootstrapCredentials(ctx, p, req.Body.NewUsername, req.Body.NewPassword)
	if err != nil {
		return nil, err
	}
	return gen.SetBootstrapCredentials200JSONResponse(h.tokensDTO(ctx, t)), nil
}

// ListMySessions реализует gen.StrictServerInterface.
func (h *Handler) ListMySessions(ctx context.Context, _ gen.ListMySessionsRequestObject) (gen.ListMySessionsResponseObject, error) {
	p, err := principal(ctx)
	if err != nil {
		return nil, err
	}
	sessions, err := h.svc.ListSessions(ctx, p)
	if err != nil {
		return nil, err
	}
	items := make([]gen.Session, 0, len(sessions))
	for _, s := range sessions {
		items = append(items, gen.Session{
			Id:         s.ID,
			DeviceName: s.DeviceName,
			ClientType: gen.ClientType(s.ClientType),
			CreatedAt:  s.CreatedAt,
			LastUsedAt: s.LastUsedAt,
			Current:    s.ID == p.SessionID,
		})
	}
	return gen.ListMySessions200JSONResponse{Items: items}, nil
}

// RevokeMySession реализует gen.StrictServerInterface.
func (h *Handler) RevokeMySession(ctx context.Context, req gen.RevokeMySessionRequestObject) (gen.RevokeMySessionResponseObject, error) {
	p, err := principal(ctx)
	if err != nil {
		return nil, err
	}
	if err := h.svc.RevokeSession(ctx, p, req.Id); err != nil {
		return nil, err
	}
	return gen.RevokeMySession204Response{}, nil
}

// tokensDTO собирает ответ с токенами: веб получает refresh в cookie, Android — в теле.
func (h *Handler) tokensDTO(ctx context.Context, t Tokens) gen.AuthTokens {
	out := gen.AuthTokens{
		AccessToken: t.Access,
		TokenType:   gen.Bearer,
		ExpiresIn:   int(t.ExpiresIn / time.Second),
		User:        MeDTO(t.User),
	}
	if t.ClientType == ClientWeb {
		setCookie(ctx, &http.Cookie{
			Name:     RefreshCookie,
			Value:    t.Refresh,
			Path:     refreshCookiePath,
			MaxAge:   int(h.svc.cfg.RefreshTTL / time.Second),
			HttpOnly: true,
			Secure:   h.cookieSecure,
			SameSite: http.SameSiteStrictMode,
		})
	} else {
		refresh := t.Refresh
		out.RefreshToken = &refresh
	}
	return out
}

func (h *Handler) clearCookie(ctx context.Context) {
	setCookie(ctx, &http.Cookie{
		Name: RefreshCookie, Path: refreshCookiePath, MaxAge: -1,
		HttpOnly: true, Secure: h.cookieSecure, SameSite: http.SameSiteStrictMode,
	})
}

// MeDTO переводит пользователя в схему Me.
func MeDTO(u User) gen.Me {
	return gen.Me{
		Id:                    u.ID,
		Username:              u.Username,
		DisplayName:           u.DisplayName,
		Role:                  gen.Role(u.Role),
		ReviewsUploads:        u.ReviewsUploads,
		Locale:                u.Locale,
		UiPrefs:               uiPrefsDTO(u.UIPrefs),
		MustChangePassword:    u.MustChangePassword,
		MustChangeCredentials: u.MustChangeCredentials,
		CreatedAt:             u.CreatedAt,
	}
}

func uiPrefsDTO(p UIPrefs) gen.UiPrefs {
	return gen.UiPrefs{
		Theme:          (*gen.UiPrefsTheme)(p.Theme),
		WaveVariant:    (*gen.UiPrefsWaveVariant)(p.WaveVariant),
		WebPlayer:      (*gen.UiPrefsWebPlayer)(p.WebPlayer),
		SearchPosition: (*gen.UiPrefsSearchPosition)(p.SearchPos),
		SearchCollapse: p.SearchFold,
		HomeActivities: p.HomeActs,
		HomeMoods:      p.HomeMoods,
		MobilePlayer:   (*gen.UiPrefsMobilePlayer)(p.MobilePlayer),
		Ambient:        p.Ambient,
		CrossfadeS:     p.CrossfadeS,
		Normalize:      p.Normalize,
	}
}

func uiPrefsFromDTO(p gen.UiPrefs) UIPrefs {
	return UIPrefs{
		Theme:        (*string)(p.Theme),
		WaveVariant:  (*string)(p.WaveVariant),
		WebPlayer:    (*string)(p.WebPlayer),
		SearchPos:    (*string)(p.SearchPosition),
		SearchFold:   p.SearchCollapse,
		HomeActs:     p.HomeActivities,
		HomeMoods:    p.HomeMoods,
		MobilePlayer: (*string)(p.MobilePlayer),
		Ambient:      p.Ambient,
		CrossfadeS:   p.CrossfadeS,
		Normalize:    p.Normalize,
	}
}