DP44/enriched-qwen3-coder-next/DataPRO/Modules/SystemSettings/PowerAndBattery.md

---
source_files:
  - DataPRO/Modules/SystemSettings/PowerAndBattery/PowerAndBatteryModule.cs
generated_at: "2026-04-16T04:39:36.503706+00:00"
model: "Qwen/Qwen3-Coder-Next-FP8"
schema_version: 1
sha256: "db7e4da125c7a0e8"
---

# PowerAndBattery

## Documentation: PowerAndBatteryModule

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### **Purpose**  
The `PowerAndBatteryModule` is a Prism-based modular component responsible for registering the view and view model for the Power & Battery feature within the application’s UI. It enables lazy loading and dependency injection integration for the `PowerAndBatteryView` and `PowerAndBatteryViewModel` types via the Unity container. Additionally, it contributes metadata (specifically image and grouping information) to the main UI for visual identification and categorization of this module.

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### **Public Interface**

#### **`PowerAndBatteryModule` Class**
- **`PowerAndBatteryModule(IUnityContainer unityContainer)`**  
  Constructor. Accepts a Unity container via dependency injection and stores it for later use in type registration.

- **`void Initialize()`**  
  Registers two interfaces to their concrete implementations as singleton types in the Unity container:  
  - `IPowerAndBatteryView` → `PowerAndBatteryView`  
  - `IPowerAndBatteryViewModel` → `PowerAndBatteryViewModel`  
  This method is called both directly during module initialization and indirectly via `RegisterTypes`.

- **`void OnInitialized(IContainerProvider containerProvider)`**  
  Currently empty. No logic is executed during Prism’s `OnInitialized` pipeline phase.

- **`void RegisterTypes(IContainerRegistry containerRegistry)`**  
  Delegates to `Initialize()` (which uses the injected `_unityContainer`, *not* `containerRegistry`).  
  ⚠️ **Note**: The `containerRegistry` parameter is unused; registration occurs on the pre-injected `_unityContainer`, which may be inconsistent with Prism’s intended `IContainerRegistry` usage.

#### **`PowerAndBatteryImageAttribute` Class**
- **`PowerAndBatteryImageAttribute()`**  
  Default constructor. Calls the overloaded constructor with `null`.

- **`PowerAndBatteryImageAttribute(string s)`**  
  Constructor accepting a string (unused in implementation). Loads and caches the assembly image via `AssemblyInfo.GetImage(AssemblyNames.PowerAndBattery.ToString())`.

- **`override BitmapImage AssemblyImage { get; }`**  
  Returns the cached `BitmapImage` loaded from the assembly resource for the PowerAndBattery module.

- **`override BitmapImage GetAssemblyImage()`**  
  Returns the value of `AssemblyImage`.

- **`override string AssemblyName { get; }`**  
  Returns `"PowerAndBattery"` (via `AssemblyNames.PowerAndBattery.ToString()`).

- **`override string GetAssemblyName()`**  
  Returns the value of `AssemblyName`.

- **`override string AssemblyGroup { get; }`**  
  Returns `"Administrative"` (via `eAssemblyGroups.Administrative.ToString()`).

- **`override string GetAssemblyGroup()`**  
  Returns the value of `AssemblyGroup`.

- **`override eAssemblyRegion AssemblyRegion { get; }`**  
  Throws `NotImplementedException`. *Always throws*; never returns a value.

- **`override eAssemblyRegion GetAssemblyRegion()`**  
  Delegates to `AssemblyRegion`, thus also throws `NotImplementedException`.

- **`override Type GetAttributeType()`**  
  Returns `typeof(ImageAttribute)`.

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### **Invariants**
- The `PowerAndBatteryModule` must be loaded *after* the Unity container is available and *before* views/view models are resolved.
- `IPowerAndBatteryView` and `IPowerAndBatteryViewModel` must be registered exactly once per module load (enforced by singleton registration).
- `AssemblyImage` and `AssemblyName` are immutable after first access (cached in private fields `_img`, `_name`, `_group`).
- `AssemblyGroup` is *always* `"Administrative"` (hardcoded).
- `AssemblyRegion` and `GetAssemblyRegion()` are *never* functional — they always throw `NotImplementedException`.

---

### **Dependencies**

#### **Module Depends On**
- `Unity.IUnityContainer` — for type registration.
- `Prism.Modularity.IModule` — base interface for Prism modules.
- `DTS.Common` — specifically:
  - `AssemblyInfo.GetImage(...)`
  - `AssemblyNames.PowerAndBattery`
  - `eAssemblyGroups.Administrative`
- `System.Windows.Media.Imaging.BitmapImage` — for image metadata.
- `System.ComponentModel.Composition.ExportAttribute` — for Prism module discovery.

#### **Module Is Used By**
- Prism’s module catalog/loader (via `[Export(typeof(IModule))]` and `[Module(...)]` attributes).
- The main UI layer — via `PowerAndBatteryImageAttribute` applied at the assembly level (inferred from XML doc comment: *“used on the Main screen to display available components”*).

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### **Gotchas**
- **`RegisterTypes` ignores its parameter**: The method accepts `IContainerRegistry containerRegistry` but internally calls `Initialize()`, which uses the injected `_unityContainer`. This is inconsistent with Prism’s design (where `IContainerRegistry` is the expected registration mechanism) and may cause issues if the module is used in a non-Unity Prism environment or if `containerRegistry` is expected to be used.
- **`AssemblyRegion` is non-functional**: Both `AssemblyRegion` and `GetAssemblyRegion()` throw `NotImplementedException`. Any UI logic relying on region classification will fail at runtime.
- **Redundant field assignments**: Private fields (`_img`, `_name`, `_group`) are assigned in both the property getter and constructor, but the getter always returns the cached value — the constructor assignment is redundant.
- **Unused constructor parameter in `PowerAndBatteryImageAttribute(string s)`**: The `string s` parameter is never used.
- **No validation on image loading**: `AssemblyInfo.GetImage(...)` may throw if the assembly resource is missing or malformed; no error handling is present.

None identified beyond the above.