9 files changed, 298 insertions, 0 deletions
diff --git a/nexus/services/account/account.go b/nexus/services/account/account.go
new file mode 100644
index 0000000..a990659
--- /dev/null
+++ b/nexus/services/account/account.go
@@ -0,0 +1,46 @@
+package account
+
+import (
+	"fmt"
+	"nexus/models"
+	"nexus/repositories/account"
+	"nexus/utils/logger"
+	"nexus/utils/shortcuts"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/google/uuid"
+)
+
+func GetByID(id uuid.UUID) (*models.Account, *fiber.Error) {
+	a, err := account.FindByID(id)
+	if err != nil {
+		return nil, shortcuts.ServiceError(fiber.StatusNotFound, ErrAccountNotFound)
+	}
+	return a, nil
+}
+
+func Disable(id uuid.UUID) *fiber.Error {
+	if _, err := account.FindByID(id); err != nil {
+		return shortcuts.ServiceError(fiber.StatusNotFound, ErrAccountNotFound)
+	}
+
+	if err := account.Disable(id); err != nil {
+		logger.Errorf(LogPrefix, AccountDisableFailed, err)
+		return shortcuts.ServiceError(fiber.StatusInternalServerError, fmt.Sprintf(AccountDisableFailed, err))
+	}
+
+	return nil
+}
+
+func Delete(id uuid.UUID) *fiber.Error {
+	if _, err := account.FindByID(id); err != nil {
+		return shortcuts.ServiceError(fiber.StatusNotFound, ErrAccountNotFound)
+	}
+
+	if err := account.Delete(id); err != nil {
+		logger.Errorf(LogPrefix, AccountDeleteFailed, err)
+		return shortcuts.ServiceError(fiber.StatusInternalServerError, fmt.Sprintf(AccountDeleteFailed, err))
+	}
+
+	return nil
+}
diff --git a/nexus/services/account/defaults.go b/nexus/services/account/defaults.go
new file mode 100644
index 0000000..ec8fedb
--- /dev/null
+++ b/nexus/services/account/defaults.go
@@ -0,0 +1,3 @@
+package account
+
+const LogPrefix = "Account"
diff --git a/nexus/services/account/messages.go b/nexus/services/account/messages.go
new file mode 100644
index 0000000..6bf6024
--- /dev/null
+++ b/nexus/services/account/messages.go
@@ -0,0 +1,7 @@
+package account
+
+const (
+	ErrAccountNotFound   = "account not found"
+	AccountDisableFailed = "failed to disable account: %v"
+	AccountDeleteFailed  = "failed to delete account: %v"
+)
diff --git a/nexus/services/auth/auth.go b/nexus/services/auth/auth.go
new file mode 100644
index 0000000..c9c97c6
--- /dev/null
+++ b/nexus/services/auth/auth.go
@@ -0,0 +1,129 @@
+package auth
+
+import (
+	"fmt"
+	"nexus/config"
+	"nexus/models"
+	"nexus/repositories/account"
+	"nexus/repositories/session"
+	"nexus/types/auth"
+	"nexus/utils/logger"
+	"nexus/utils/shortcuts"
+	"nexus/utils/token"
+	"time"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/google/uuid"
+)
+
+func Register(req auth.RegisterRequest) (*models.Account, *fiber.Error) {
+	if existing, _ := account.FindByEmail(req.Email); existing != nil {
+		return nil, shortcuts.ServiceError(fiber.StatusConflict, ErrEmailTaken)
+	}
+
+	if existing, _ := account.FindByUsername(req.Username); existing != nil {
+		return nil, shortcuts.ServiceError(fiber.StatusConflict, ErrUsernameTaken)
+	}
+
+	a := &models.Account{
+		Username: req.Username,
+		Email:    req.Email,
+	}
+
+	if err := a.SetPassword(req.Password); err != nil {
+		logger.Errorf(LogPrefix, PasswordHashFailed, err)
+		return nil, shortcuts.ServiceError(fiber.StatusInternalServerError, fmt.Sprintf(PasswordHashFailed, err))
+	}
+
+	if err := account.Create(a); err != nil {
+		logger.Errorf(LogPrefix, AccountCreateFailed, err)
+		return nil, shortcuts.ServiceError(fiber.StatusInternalServerError, fmt.Sprintf(AccountCreateFailed, err))
+	}
+
+	logger.Successf(LogPrefix, AccountCreated, a.Username)
+	return a, nil
+}
+
+func Login(req auth.LoginRequest, ip string, userAgent string) (*models.Session, *fiber.Error) {
+	a, err := account.FindByEmail(req.Email)
+	if err != nil || a == nil {
+		return nil, shortcuts.ServiceError(fiber.StatusUnauthorized, ErrInvalidCredentials)
+	}
+
+	if !a.IsActive {
+		return nil, shortcuts.ServiceError(fiber.StatusForbidden, ErrAccountDisabled)
+	}
+
+	if !a.CheckPassword(req.Password) {
+		return nil, shortcuts.ServiceError(fiber.StatusUnauthorized, ErrInvalidCredentials)
+	}
+
+	s, sessionErr := createSession(a.ID, ip, userAgent)
+	if sessionErr != nil {
+		return nil, sessionErr
+	}
+
+	logger.Successf(LogPrefix, LoginSuccess, a.Username)
+	return s, nil
+}
+
+func Refresh(refreshToken string, ip string, userAgent string) (*models.Session, *fiber.Error) {
+	s, err := session.FindByRefreshToken(refreshToken)
+	if err != nil || s == nil {
+		return nil, shortcuts.ServiceError(fiber.StatusUnauthorized, ErrInvalidToken)
+	}
+
+	if s.IsRefreshExpired() {
+		_ = session.Delete(s.ID)
+		return nil, shortcuts.ServiceError(fiber.StatusUnauthorized, ErrTokenExpired)
+	}
+
+	_ = session.Delete(s.ID)
+
+	return createSession(s.AccountID, ip, userAgent)
+}
+
+func Logout(authToken string) *fiber.Error {
+	s, err := session.FindByAuthToken(authToken)
+	if err != nil || s == nil {
+		return shortcuts.ServiceError(fiber.StatusUnauthorized, ErrInvalidToken)
+	}
+
+	if err := session.Delete(s.ID); err != nil {
+		logger.Errorf(LogPrefix, LogoutFailed, err)
+		return shortcuts.ServiceError(fiber.StatusInternalServerError, fmt.Sprintf(LogoutFailed, err))
+	}
+
+	return nil
+}
+
+func createSession(accountID uuid.UUID, ip string, userAgent string) (*models.Session, *fiber.Error) {
+	authToken, err := token.Generate()
+	if err != nil {
+		logger.Errorf(LogPrefix, TokenGenerateFailed, err)
+		return nil, shortcuts.ServiceError(fiber.StatusInternalServerError, fmt.Sprintf(TokenGenerateFailed, err))
+	}
+
+	refreshToken, err := token.Generate()
+	if err != nil {
+		logger.Errorf(LogPrefix, TokenGenerateFailed, err)
+		return nil, shortcuts.ServiceError(fiber.StatusInternalServerError, fmt.Sprintf(TokenGenerateFailed, err))
+	}
+
+	s := &models.Session{
+		AccountID:     accountID,
+		AuthToken:     authToken,
+		RefreshToken:  refreshToken,
+		AuthExpiry:    time.Now().Add(time.Duration(config.Token.AuthExpiry) * time.Minute),
+		RefreshExpiry: time.Now().Add(time.Duration(config.Token.RefreshExpiry) * 24 * time.Hour),
+		IPAddress:     ip,
+		UserAgent:     userAgent,
+	}
+
+	if err := session.Create(s); err != nil {
+		logger.Errorf(LogPrefix, SessionCreateFailed, err)
+		return nil, shortcuts.ServiceError(fiber.StatusInternalServerError, fmt.Sprintf(SessionCreateFailed, err))
+	}
+
+	return s, nil
+}
diff --git a/nexus/services/auth/defaults.go b/nexus/services/auth/defaults.go
new file mode 100644
index 0000000..3a18c38
--- /dev/null
+++ b/nexus/services/auth/defaults.go
@@ -0,0 +1,3 @@
+package auth
+
+const LogPrefix = "Auth"
diff --git a/nexus/services/auth/messages.go b/nexus/services/auth/messages.go
new file mode 100644
index 0000000..b13dfe6
--- /dev/null
+++ b/nexus/services/auth/messages.go
@@ -0,0 +1,17 @@
+package auth
+
+const (
+	ErrEmailTaken         = "email is already taken"
+	ErrUsernameTaken      = "username is already taken"
+	ErrInvalidCredentials = "invalid email or password"
+	ErrAccountDisabled    = "account is disabled"
+	ErrInvalidToken       = "invalid token"
+	ErrTokenExpired       = "token has expired"
+	PasswordHashFailed    = "failed to hash password: %v"
+	AccountCreateFailed   = "failed to create account: %v"
+	AccountCreated        = "account created: %s"
+	LoginSuccess          = "login successful: %s"
+	LogoutFailed          = "failed to logout: %v"
+	TokenGenerateFailed   = "failed to generate token: %v"
+	SessionCreateFailed   = "failed to create session: %v"
+)
diff --git a/nexus/services/character/character.go b/nexus/services/character/character.go
new file mode 100644
index 0000000..c607d66
--- /dev/null
+++ b/nexus/services/character/character.go
@@ -0,0 +1,79 @@
+package character
+
+import (
+	"fmt"
+	"nexus/models"
+	"nexus/repositories/character"
+	"nexus/repositories/realm"
+	characterTypes "nexus/types/character"
+	"nexus/utils/logger"
+	"nexus/utils/shortcuts"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/google/uuid"
+)
+
+func GetAllForAccount(accountID uuid.UUID) ([]models.Character, *fiber.Error) {
+	characters, err := character.FindByAccountID(accountID)
+	if err != nil {
+		logger.Errorf(LogPrefix, CharactersFetchFailed, err)
+		return nil, shortcuts.ServiceError(fiber.StatusInternalServerError, fmt.Sprintf(CharactersFetchFailed, err))
+	}
+	return characters, nil
+}
+
+func GetByID(id uuid.UUID, accountID uuid.UUID) (*models.Character, *fiber.Error) {
+	c, err := character.FindByID(id)
+	if err != nil {
+		return nil, shortcuts.ServiceError(fiber.StatusNotFound, ErrCharacterNotFound)
+	}
+	if c.AccountID != accountID {
+		return nil, shortcuts.ServiceError(fiber.StatusNotFound, ErrCharacterNotFound)
+	}
+	return c, nil
+}
+
+func Create(accountID uuid.UUID, req characterTypes.CreateRequest) (*models.Character, *fiber.Error) {
+	r, err := realm.FindByID(req.RealmID)
+	if err != nil || r == nil {
+		return nil, shortcuts.ServiceError(fiber.StatusNotFound, ErrRealmNotFound)
+	}
+
+	if !r.IsOnline {
+		return nil, shortcuts.ServiceError(fiber.StatusServiceUnavailable, ErrRealmOffline)
+	}
+
+	c := &models.Character{
+		AccountID:       accountID,
+		RealmID:         req.RealmID,
+		Name:            req.Name,
+		Race:            req.Race,
+		StartingKingdom: req.StartingKingdom,
+	}
+
+	if err := character.Create(c); err != nil {
+		logger.Errorf(LogPrefix, CharacterCreateFailed, err)
+		return nil, shortcuts.ServiceError(fiber.StatusInternalServerError, fmt.Sprintf(CharacterCreateFailed, err))
+	}
+
+	logger.Successf(LogPrefix, CharacterCreated, c.Name)
+	return c, nil
+}
+
+func Delete(id uuid.UUID, accountID uuid.UUID) *fiber.Error {
+	c, err := character.FindByID(id)
+	if err != nil {
+		return shortcuts.ServiceError(fiber.StatusNotFound, ErrCharacterNotFound)
+	}
+
+	if c.AccountID != accountID {
+		return shortcuts.ServiceError(fiber.StatusNotFound, ErrCharacterNotFound)
+	}
+
+	if err := character.Delete(id); err != nil {
+		logger.Errorf(LogPrefix, CharacterDeleteFailed, err)
+		return shortcuts.ServiceError(fiber.StatusInternalServerError, fmt.Sprintf(CharacterDeleteFailed, err))
+	}
+
+	return nil
+}
diff --git a/nexus/services/character/defaults.go b/nexus/services/character/defaults.go
new file mode 100644
index 0000000..f79094b
--- /dev/null
+++ b/nexus/services/character/defaults.go
@@ -0,0 +1,3 @@
+package character
+
+const LogPrefix = "Character"
diff --git a/nexus/services/character/messages.go b/nexus/services/character/messages.go
new file mode 100644
index 0000000..ba7ee07
--- /dev/null
+++ b/nexus/services/character/messages.go
@@ -0,0 +1,11 @@
+package character
+
+const (
+	ErrCharacterNotFound  = "character not found"
+	ErrRealmNotFound      = "realm not found"
+	ErrRealmOffline       = "realm is currently offline"
+	CharactersFetchFailed = "failed to fetch characters: %v"
+	CharacterCreateFailed = "failed to create character: %v"
+	CharacterDeleteFailed = "failed to delete character: %v"
+	CharacterCreated      = "character created: %s"
+)