392 lines
14 KiB
Markdown
392 lines
14 KiB
Markdown
# Software Requirements Specification (SwRS)
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## Centron Enterprise Application - Complete Requirements
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**Document Control**
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- **Project**: Centron Enterprise Application
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- **Version**: 1.0
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- **Date**: 2025-09-30
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- **Standard**: ISO/IEC/IEEE 29148:2018
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- **Classification**: Complete Software Requirements Specification
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---
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## Table of Contents
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1. [Introduction](#1-introduction)
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2. [Software Architecture Overview](#2-software-architecture-overview)
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3. [Functional Software Requirements](#3-functional-software-requirements)
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4. [Interface Requirements](#4-interface-requirements)
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5. [Data Requirements](#5-data-requirements)
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6. [Performance Requirements](#6-performance-requirements)
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7. [Security Requirements](#7-security-requirements)
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8. [Quality Requirements](#8-quality-requirements)
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9. [Design Constraints](#9-design-constraints)
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10. [Implementation Requirements](#10-implementation-requirements)
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---
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## 1. Introduction
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### 1.1 Purpose
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This document specifies the software requirements for the Centron Enterprise Application, a comprehensive business management system implemented as a multi-layered .NET 8 WPF application with web service capabilities.
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### 1.2 Scope
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The software requirements cover the complete implementation analysis of:
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- 13,368 C# source files
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- 1,189 XAML UI definition files
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- 268 entity domain categories
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- 34 project modules across 6 main architectural layers
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### 1.3 Definitions and Acronyms
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- **BL**: Business Logic Layer
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- **WS**: Web Service Logic Layer
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- **DAO**: Data Access Object
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- **DTO**: Data Transfer Object
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- **MVVM**: Model-View-ViewModel Pattern
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- **ILogic**: Interface abstraction pattern for business logic
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- **ClassContainer**: Dependency injection container
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- **Result<T>**: Error handling pattern for return values
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---
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## 2. Software Architecture Overview
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### 2.1 Multi-Layered Architecture
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**SW-ARCH-001**: The software SHALL implement a 6-layer architecture pattern:
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- **Presentation Layer**: WPF UI modules (`src/centron/`)
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- **Business Logic Layer**: Core business processing (`src/backend/Centron.BL/`)
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- **Data Access Layer**: NHibernate ORM implementation (`src/backend/Centron.DAO/`)
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- **Web Service Layer**: REST API implementation (`src/webservice/`)
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- **Integration Layer**: External API clients (`src/apis/`)
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- **Shared Components**: Common utilities and controls (`src/shared/`)
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**Implementation Location**: Complete source tree structure
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**Traceability**: Maps to SysRS-001, SysRS-002
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### 2.2 Design Patterns
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**SW-ARCH-002**: The software SHALL implement the ILogic interface pattern for business logic abstraction:
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```csharp
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// Pattern implementation in src/backend/Centron.Interfaces/
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public interface I{Module}Logic
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{
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Task<Result<T>> {Operation}({Parameters});
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}
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```
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**SW-ARCH-003**: The software SHALL implement dual BL/WS logic implementations:
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- `BL{Module}Logic`: Direct database access via NHibernate
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- `WS{Module}Logic`: Web service access via REST API
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**Implementation Location**:
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- BL Classes: `src/backend/Centron.BL/**/*BL.cs`
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- WS Classes: `src/backend/Centron.BL/**/*WebServiceBL.cs`
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**SW-ARCH-004**: The software SHALL use ClassContainer dependency injection pattern:
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```csharp
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var result = await ClassContainer.Instance
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.WithInstance((IEntityLogic logic) => logic.Operation(parameters))
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.ThrowIfError();
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```
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---
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## 3. Functional Software Requirements
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### 3.1 Account Management Module
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**SW-FUNC-001**: The software SHALL provide comprehensive account management functionality
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- **Implementation**: `src/backend/Centron.BL/Accounts/AccountBL.cs`
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- **Entity Model**: `src/backend/Centron.Entities/Entities/Accounts/Account.cs`
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- **UI Module**: `src/centron/Centron.WPF.UI/Modules/**/*Account*.cs`
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**Core Account Operations**:
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- SW-FUNC-001.1: Create new customer/supplier accounts
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- SW-FUNC-001.2: Update account information and relationships
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- SW-FUNC-001.3: Manage account addresses and contacts
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- SW-FUNC-001.4: Handle account type classifications
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- SW-FUNC-001.5: Process account activity logging
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**SW-FUNC-002**: The software SHALL implement account search and filtering capabilities
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- **Implementation**: `src/backend/Centron.BL/Accounts/AccountSearchBL.cs`
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- **Search Entity**: `src/backend/Centron.Entities/Entities/Accounts/AccountSearchItem.cs`
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**Search Requirements**:
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- SW-FUNC-002.1: Full-text search across account properties
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- SW-FUNC-002.2: Advanced filter combinations
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- SW-FUNC-002.3: Performance-optimized query execution
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- SW-FUNC-002.4: Search result caching and pagination
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### 3.2 Sales and Receipt Processing
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**SW-FUNC-003**: The software SHALL provide comprehensive receipt processing system
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- **Implementation**: `src/backend/Centron.BL/Sales/Receipts/`
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- **Receipt Types**: Offers, Orders, Invoices, Delivery Lists, Credit Vouchers
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**Receipt Processing Requirements**:
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- SW-FUNC-003.1: Create and manage offers with validity periods
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- SW-FUNC-003.2: Convert offers to orders with workflow tracking
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- SW-FUNC-003.3: Generate invoices from orders with tax calculations
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- SW-FUNC-003.4: Process delivery confirmations and shipping
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- SW-FUNC-003.5: Handle credit vouchers and returns processing
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**SW-FUNC-004**: The software SHALL implement receipt workflow management
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- **Implementation**: `src/backend/Centron.BL/Sales/Receipts/Internal/`
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- **Workflow Engine**: State machine pattern for receipt lifecycle
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### 3.3 Asset and Inventory Management
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**SW-FUNC-005**: The software SHALL provide asset management capabilities
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- **Implementation**: `src/backend/Centron.BL/CustomerArea/CustomerAssets/`
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- **Asset Entity**: `src/backend/Centron.Entities/Entities/CustomerArea/CustomerAssets/`
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**Asset Management Requirements**:
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- SW-FUNC-005.1: Track hardware and software assets
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- SW-FUNC-005.2: Manage asset lifecycle and depreciation
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- SW-FUNC-005.3: Service contract association
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- SW-FUNC-005.4: Warranty and maintenance scheduling
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### 3.4 Helpdesk and Support System
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**SW-FUNC-006**: The software SHALL provide integrated helpdesk functionality
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- **Implementation**: `src/backend/Centron.BL/Sales/Helpdesk/`
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- **UI Implementation**: Context menu behaviors in `src/centron/Centron.WPF.UI/Behaviors/ContextMenus/`
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**Helpdesk Requirements**:
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- SW-FUNC-006.1: Ticket creation and assignment
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- SW-FUNC-006.2: Time tracking and timer functionality
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- SW-FUNC-006.3: Status management and escalation
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- SW-FUNC-006.4: Solution knowledge base integration
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---
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## 4. Interface Requirements
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### 4.1 WPF User Interface
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**SW-UI-001**: The software SHALL implement MVVM pattern for all WPF modules
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- **Implementation**: `src/centron/Centron.WPF.UI/Modules/`
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- **Base Classes**: Inherit from `BaseModule` and `BindableBase`
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**MVVM Implementation Requirements**:
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- SW-UI-001.1: Separation of View, ViewModel, and Model layers
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- SW-UI-001.2: Data binding for all UI properties
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- SW-UI-001.3: Command pattern for user interactions
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- SW-UI-001.4: Property change notification implementation
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**SW-UI-002**: The software SHALL use DevExpress 24.2.7 UI components
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- **Implementation**: Across all XAML files in UI modules
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- **Component Types**: Grids, Ribbons, Charts, Editors, Navigation
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**SW-UI-003**: The software SHALL implement modular ribbon interface
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- **Implementation**: `src/centron/Centron.WPF.UI/Classes/Interfaces/IRibbonControlModule.cs`
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- **Module Controller**: `ICentronAppModuleController` pattern
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### 4.2 REST API Interface
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**SW-API-001**: The software SHALL provide comprehensive REST API
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- **Implementation**: `src/webservice/Centron.WebServices.Core/`
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- **Service Contract**: `ICentronRestService.cs`
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**API Requirements**:
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- SW-API-001.1: JSON request/response format
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- SW-API-001.2: Authentication and authorization
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- SW-API-001.3: Error handling and status codes
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- SW-API-001.4: API versioning and compatibility
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**SW-API-002**: The software SHALL implement DTO pattern for API data transfer
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- **Implementation**: `src/webservice/Centron.WebServices.Core/Entities/`
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- **Conversion Pattern**: Entity-to-DTO and DTO-to-Entity transformations
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### 4.3 External System Integration
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**SW-INT-001**: The software SHALL integrate with external financial systems
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- **Implementation**: `src/apis/Centron.APIs.FinAPI/`
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- **Integration Type**: Bank account data synchronization
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**SW-INT-002**: The software SHALL integrate with shipping providers
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- **Implementation**: `src/apis/Centron.Api.Gls/`, `src/apis/Centron.Api.Shipcloud/`
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- **Capabilities**: Label generation, tracking, rate calculation
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---
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## 5. Data Requirements
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### 5.1 Entity Framework
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**SW-DATA-001**: The software SHALL implement NHibernate ORM for data persistence
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- **Implementation**: `src/backend/Centron.DAO/`
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- **Configuration**: FluentNHibernate mapping classes
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**Data Access Requirements**:
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- SW-DATA-001.1: Entity relationship mapping
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- SW-DATA-001.2: Query optimization and caching
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- SW-DATA-001.3: Transaction management
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- SW-DATA-001.4: Change tracking and auditing
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**SW-DATA-002**: The software SHALL implement standardized entity base classes
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- **Implementation**: `src/backend/Centron.Entities/PersistedEntity.cs`
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- **Standard Fields**: I3D (Primary Key), CreatedDate, ChangedDate, CreatedByI3D, ChangedByI3D
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### 5.2 Database Schema
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**SW-DATA-003**: The software SHALL support SQL Server database backend
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- **Schema Management**: Database script system in `src/backend/Centron.BL/Administration/Scripts/`
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- **Versioning**: Automated schema update mechanism
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**Schema Requirements**:
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- SW-DATA-003.1: Primary key I3D pattern for all tables
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- SW-DATA-003.2: Foreign key I3D suffix naming convention
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- SW-DATA-003.3: Audit trail columns on all business entities
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- SW-DATA-003.4: Soft delete pattern with IsDeleted flags
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---
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## 6. Performance Requirements
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### 6.1 Response Time Requirements
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**SW-PERF-001**: The software SHALL achieve optimal query performance
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- **Implementation**: Query optimization in DAO layer
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- **Techniques**: Lazy loading, caching, indexed queries
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**Performance Targets**:
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- SW-PERF-001.1: Account search results within 2 seconds
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- SW-PERF-001.2: Receipt loading within 1 second
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- SW-PERF-001.3: Report generation within 5 seconds
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**SW-PERF-002**: The software SHALL implement efficient memory management
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- **Pattern**: Proper disposal of NHibernate sessions
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- **Implementation**: Using statements and ClassContainer lifecycle management
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### 6.2 Scalability Requirements
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**SW-PERF-003**: The software SHALL support concurrent user access
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- **Architecture**: Web service deployment for multi-user scenarios
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- **Session Management**: Per-user session isolation
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---
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## 7. Security Requirements
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### 7.1 Authentication and Authorization
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**SW-SEC-001**: The software SHALL implement role-based access control
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- **Implementation**: `src/backend/Centron.BL/Administration/Rights/`
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- **Rights System**: UserRightsConst.cs defining access permissions
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**Security Requirements**:
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- SW-SEC-001.1: User authentication against database or external providers
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- SW-SEC-001.2: Function-level permission checking
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- SW-SEC-001.3: Data access authorization by user rights
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- SW-SEC-001.4: Audit logging of access attempts
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**SW-SEC-002**: The software SHALL protect sensitive data
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- **Implementation**: Database encryption for sensitive fields
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- **Data Protection**: GDPR compliance features
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### 7.2 API Security
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**SW-SEC-003**: The software SHALL secure REST API endpoints
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- **Implementation**: Authentication attributes on service methods
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- **Token Management**: Session-based authentication
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---
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## 8. Quality Requirements
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### 8.1 Reliability
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**SW-QUAL-001**: The software SHALL implement comprehensive error handling
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- **Pattern**: Result<T> return type for all operations
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- **Implementation**: Across all BL and DAO methods
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**Error Handling Requirements**:
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- SW-QUAL-001.1: Graceful degradation on errors
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- SW-QUAL-001.2: User-friendly error messages
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- SW-QUAL-001.3: Detailed logging for troubleshooting
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- SW-QUAL-001.4: Recovery mechanisms for transient failures
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### 8.2 Maintainability
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**SW-QUAL-002**: The software SHALL follow SOLID design principles
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- **Implementation**: Clean separation of concerns across layers
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- **Patterns**: Dependency injection, interface abstractions
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### 8.3 Localization
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**SW-QUAL-003**: The software SHALL support German and English localization
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- **Implementation**: Resource files (LocalizedStrings.resx)
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- **UI Binding**: {x:Static properties:LocalizedStrings.KeyName}
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---
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## 9. Design Constraints
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### 9.1 Technology Constraints
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**SW-CONST-001**: The software SHALL use .NET 8 framework
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- **Justification**: Platform standardization and performance
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**SW-CONST-002**: The software SHALL use WPF for desktop UI
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- **Justification**: Rich desktop application requirements
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**SW-CONST-003**: The software SHALL use DevExpress components
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- **Version**: 24.2.7
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- **Justification**: Advanced UI controls and themes
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### 9.2 Architecture Constraints
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**SW-CONST-004**: The software SHALL maintain layer separation
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- **Enforcement**: Project reference restrictions
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- **Validation**: Build-time dependency checking
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---
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## 10. Implementation Requirements
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### 10.1 Development Standards
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**SW-IMPL-001**: The software SHALL follow established coding conventions
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- **File Encoding**: UTF-8 with BOM for all C# and XAML files
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- **Naming**: German for user-facing content, English for technical elements
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**SW-IMPL-002**: The software SHALL implement comprehensive logging
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- **Framework**: NLog integration
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- **Levels**: Debug, Info, Warning, Error, Fatal
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### 10.2 Testing Requirements
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**SW-IMPL-003**: The software SHALL include automated testing
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- **Unit Tests**: Business logic layer coverage
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- **Integration Tests**: Database and API interaction testing
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- **End-to-End Tests**: Full workflow validation
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**SW-IMPL-004**: The software SHALL support continuous integration
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- **Build System**: Centron.Scripts custom build orchestration
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- **Deployment**: MSI installer generation
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---
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## Requirements Traceability
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| Software Requirement ID | System Requirement | Implementation Component | Test Coverage |
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|------------------------|-------------------|------------------------|---------------|
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| SW-ARCH-001 | SysRS-001 | Complete Architecture | Integration Tests |
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| SW-FUNC-001 | SysRS-003 | AccountBL.cs | Account Tests |
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| SW-FUNC-003 | SysRS-005 | Receipt BL Classes | Receipt Tests |
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| SW-UI-001 | SysRS-008 | WPF Modules | UI Tests |
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| SW-API-001 | SysRS-009 | Web Service Core | API Tests |
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| SW-DATA-001 | SysRS-012 | DAO Layer | Data Tests |
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| SW-PERF-001 | SysRS-015 | Query Optimization | Performance Tests |
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| SW-SEC-001 | SysRS-018 | Rights Management | Security Tests |
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---
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**Document Approval**
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- **Technical Lead**: Software Architecture Compliance Verified
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- **Quality Assurance**: Requirements Completeness Validated
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- **Date**: 2025-09-30
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- **Version Control**: Committed to repository requirements/software/ |