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package service
import (
"context"
"fmt"
"time"
"codeberg.org/snonux/player/internal/auth"
"codeberg.org/snonux/player/internal/clock"
"codeberg.org/snonux/player/internal/model"
"codeberg.org/snonux/player/internal/repository"
)
// authService is the concrete implementation of AuthService.
type authService struct {
store repository.AuthServiceStore
clock clock.Clock
hasher auth.Hasher
sm auth.SessionManager
tm auth.TokenManager
}
// NewAuthService creates a concrete AuthService.
// tm is required and must not be nil — passing nil will panic. This is
// intentional: the service depends on an injected TokenManager per DIP and
// refuses to silently fabricate one. Production wiring (cmd/player/main.go)
// constructs the TokenManager at the composition root via auth.NewTokenManager.
func NewAuthService(store repository.AuthServiceStore, clk clock.Clock, hasher auth.Hasher, sm auth.SessionManager, tm auth.TokenManager) *authService {
if tm == nil {
panic("service.NewAuthService: tm (auth.TokenManager) must not be nil")
}
return &authService{
store: store,
clock: clk,
hasher: hasher,
sm: sm,
tm: tm,
}
}
// Bootstrap creates the first admin user when no users exist.
func (s *authService) Bootstrap(ctx context.Context, username, password string) (*AuthResult, error) {
count, err := s.store.CountUsers(ctx)
if err != nil {
return nil, fmt.Errorf("count users: %w", err)
}
if count > 0 {
return nil, ErrAlreadyBootstrapped
}
hash, err := s.hasher.Hash(password)
if err != nil {
return nil, fmt.Errorf("hash password: %w", err)
}
user := &model.User{
Username: username,
PasswordHash: hash,
IsAdmin: true,
CreatedAt: s.clock.Now(),
}
id, err := s.store.CreateUser(ctx, user)
if err != nil {
return nil, fmt.Errorf("create user: %w", err)
}
user.ID = id
sessID, err := s.sm.CreateSession(ctx, id)
if err != nil {
return nil, fmt.Errorf("create session: %w", err)
}
return &AuthResult{User: user, SessionID: sessID}, nil
}
// Login authenticates a user and creates a session.
func (s *authService) Login(ctx context.Context, username, password string) (*AuthResult, error) {
user, err := s.store.GetUserByUsername(ctx, username)
if err != nil {
return nil, fmt.Errorf("get user: %w", err)
}
if user == nil {
return nil, ErrInvalidCredentials
}
if err := s.hasher.Compare(user.PasswordHash, password); err != nil {
return nil, ErrInvalidCredentials
}
sessID, err := s.sm.CreateSession(ctx, user.ID)
if err != nil {
return nil, fmt.Errorf("create session: %w", err)
}
return &AuthResult{User: user, SessionID: sessID}, nil
}
// CreateAPIToken creates a hashed API token and returns the one-time plaintext value.
// A token generation failure (e.g. crypto/rand.Read returning an error) is
// surfaced to the caller; the HTTP layer translates it into a 500 response.
func (s *authService) CreateAPIToken(ctx context.Context, userID int64, name string, expiresAt *time.Time) (*CreateAPITokenResult, error) {
plaintext, hash, err := s.tm.Generate()
if err != nil {
return nil, fmt.Errorf("generate api token: %w", err)
}
now := s.clock.Now()
token := &model.APIToken{
UserID: userID,
TokenHash: hash,
Name: name,
ExpiresAt: expiresAt,
CreatedAt: now,
}
id, err := s.store.Create(ctx, token)
if err != nil {
return nil, fmt.Errorf("create api token: %w", err)
}
token.ID = id
return &CreateAPITokenResult{Token: token, Plaintext: plaintext}, nil
}
// ListAPITokens returns API tokens owned by a user.
func (s *authService) ListAPITokens(ctx context.Context, userID int64) ([]model.APIToken, error) {
return s.store.ListByUser(ctx, userID)
}
// RevokeAPIToken deletes an API token owned by a user.
func (s *authService) RevokeAPIToken(ctx context.Context, userID, tokenID int64) error {
tokens, err := s.store.ListByUser(ctx, userID)
if err != nil {
return fmt.Errorf("list api tokens: %w", err)
}
if !hasAPIToken(tokens, tokenID) {
return ErrNotFound
}
if err := s.store.DeleteByID(ctx, tokenID); err != nil {
return fmt.Errorf("revoke api token: %w", err)
}
return nil
}
// AuthenticateBearer validates a Bearer token and returns a synthetic session.
func (s *authService) AuthenticateBearer(ctx context.Context, plaintext string) (*model.Session, error) {
if plaintext == "" {
return nil, ErrInvalidCredentials
}
token, err := s.store.GetByHash(ctx, s.tm.Hash(plaintext))
if err != nil {
return nil, fmt.Errorf("get api token: %w", err)
}
if token == nil {
return nil, ErrInvalidCredentials
}
now := s.clock.Now()
if token.ExpiresAt != nil && now.After(*token.ExpiresAt) {
return nil, ErrInvalidCredentials
}
_ = s.store.TouchLastUsed(ctx, token.ID, now)
return syntheticSession(token, now), nil
}
// CountUsers returns the number of user accounts.
func (s *authService) CountUsers(ctx context.Context) (int, error) {
return s.store.CountUsers(ctx)
}
// GetUserByID returns a user by database ID.
func (s *authService) GetUserByID(ctx context.Context, id int64) (*model.User, error) {
return s.store.GetUserByID(ctx, id)
}
func hasAPIToken(tokens []model.APIToken, tokenID int64) bool {
for _, token := range tokens {
if token.ID == tokenID {
return true
}
}
return false
}
func syntheticSession(token *model.APIToken, now time.Time) *model.Session {
expiresAt := now.Add(100 * 365 * 24 * time.Hour)
if token.ExpiresAt != nil {
expiresAt = *token.ExpiresAt
}
return &model.Session{
ID: fmt.Sprintf("api-token:%d", token.ID),
UserID: token.UserID,
ExpiresAt: expiresAt,
CreatedAt: token.CreatedAt,
}
}
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