[add] i18n support zh,en

api/app/i18n/__init__.py

@@ -0,0 +1,113 @@
+"""
+Internationalization (i18n) module for MemoryBear Enterprise.
+
+This module provides complete i18n support for the backend API including:
+- Translation loading from multiple directories (community + enterprise)
+- Translation service with caching and fallback
+- Language detection middleware
+- Dependency injection for FastAPI
+- Convenience functions for easy usage
+
+Usage:
+    from app.i18n import t, t_enum
+
+    # Simple translation
+    message = t("common.success.created")
+
+    # Parameterized translation
+    error = t("common.validation.required", field="名称")
+
+    # Enum translation
+    role_display = t_enum("workspace_role", "manager")
+"""
+
+from app.i18n.dependencies import (
+    get_current_language,
+    get_enum_translator,
+    get_translator,
+)
+from app.i18n.exceptions import (
+    BadRequestError,
+    ConflictError,
+    FileNotFoundError,
+    FileTooLargeError,
+    ForbiddenError,
+    I18nException,
+    InternalServerError,
+    InvalidCredentialsError,
+    InvalidFileTypeError,
+    NotFoundError,
+    QuotaExceededError,
+    RateLimitExceededError,
+    ServiceUnavailableError,
+    TenantNotFoundError,
+    TenantSuspendedError,
+    TokenExpiredError,
+    TokenInvalidError,
+    UnauthorizedError,
+    UserAlreadyExistsError,
+    UserNotFoundError,
+    ValidationError,
+    WorkspaceNotFoundError,
+    WorkspacePermissionDeniedError,
+    get_current_locale,
+    set_current_locale,
+)
+from app.i18n.loader import TranslationLoader
+from app.i18n.logger import (
+    TranslationLogger,
+    get_translation_logger,
+    log_missing_translation,
+    log_translation_error,
+)
+from app.i18n.middleware import LanguageMiddleware
+from app.i18n.service import (
+    TranslationService,
+    get_translation_service,
+    t,
+    t_enum,
+)
+
+__all__ = [
+    "TranslationLoader",
+    "LanguageMiddleware",
+    "TranslationService",
+    "get_translation_service",
+    "t",
+    "t_enum",
+    "get_current_language",
+    "get_translator",
+    "get_enum_translator",
+    # Context management
+    "get_current_locale",
+    "set_current_locale",
+    # Logging
+    "TranslationLogger",
+    "get_translation_logger",
+    "log_missing_translation",
+    "log_translation_error",
+    # Exception classes
+    "I18nException",
+    "BadRequestError",
+    "UnauthorizedError",
+    "ForbiddenError",
+    "NotFoundError",
+    "ConflictError",
+    "ValidationError",
+    "InternalServerError",
+    "ServiceUnavailableError",
+    "WorkspaceNotFoundError",
+    "WorkspacePermissionDeniedError",
+    "UserNotFoundError",
+    "UserAlreadyExistsError",
+    "TenantNotFoundError",
+    "TenantSuspendedError",
+    "InvalidCredentialsError",
+    "TokenExpiredError",
+    "TokenInvalidError",
+    "FileNotFoundError",
+    "FileTooLargeError",
+    "InvalidFileTypeError",
+    "RateLimitExceededError",
+    "QuotaExceededError",
+]