# IBookStorageService

- File ID: file:9fivst:ibookstorageservice-cs
- Path: NexusReader.Application/Abstractions/Services/IBookStorageService.cs
- Role: service
- Layer: application

## Purpose

Defines an application-level abstraction for saving ebook and cover files, returning relative paths/URLs; implementations handle actual storage persistence.

## Key Details

Interface provides async contracts for saving ebooks and covers (byte[] or Stream) and returning relative paths/URLs; cover methods explicitly allow null return when no data is provided.

## Symbols

- IBookStorageService: Defines an application-level abstraction for saving ebook and cover files, returning relative paths/URLs; implementations handle actual storage persistence.
- SaveEbookAsync(): Contract to save ebook binary data and return a relative path/URL.
- SaveEbookAsync(): Contract to save ebook data from a Stream and return a relative path/URL.
- SaveCoverAsync(): Contract to save cover image binary data and return a relative path/URL, or null if no cover provided.
- SaveCoverAsync(): Contract to save cover image from a Stream and return a relative path/URL, or null if no cover provided.
- IBookStorageService: Interface describing methods to persist ebooks and cover images and return their relative paths/URLs.

## Dependencies

- No resolved dependencies.

## Calls

- No resolved calls.

## Coverage

- Symbols: 6
- Executable symbols: 4
- Executable symbols with control flow: 4
- Grounded edges: 6
- Unresolved references: 0
- Control-flow fragments: 4
- Unresolved jumps: 0
- Unsupported constructs: 0
- Control-flow coverage: 100%
- Required diagrams: 2
- Generated diagrams: 2

## Control Flow Fragments

- SaveEbookAsync: 3 nodes, 2 edges, 0 jumps, 0 unsupported constructs
- SaveEbookAsync: 3 nodes, 2 edges, 0 jumps, 0 unsupported constructs
- SaveCoverAsync: 3 nodes, 2 edges, 0 jumps, 0 unsupported constructs
- SaveCoverAsync: 3 nodes, 2 edges, 0 jumps, 0 unsupported constructs

## Diagrams

### IBookStorageService Neighborhood

```mermaid
flowchart LR
    class_lhjxtl_ibookstorageservice("IBookStorageService")
    file_9fivst_ibookstorageservice_cs("IBookStorageService")
    method_1bjnsl7_saveebookasync[["SaveEbookAsync()"]]
    method_1cxlt22_saveebookasync[["SaveEbookAsync()"]]
    method_1pww9i7_savecoverasync[["SaveCoverAsync()"]]
    method_1sosafx_savecoverasync[["SaveCoverAsync()"]]
    type_gqvtnh_ibookstorageservice[/"IBookStorageService"/]
```

### IBookStorageService Execution Overview

```mermaid
flowchart TD
    class_lhjxtl_ibookstorageservice("IBookStorageService")
    method_1bjnsl7_saveebookasync[["SaveEbookAsync()"]]
    method_1cxlt22_saveebookasync[["SaveEbookAsync()"]]
    method_1pww9i7_savecoverasync[["SaveCoverAsync()"]]
    method_1sosafx_savecoverasync[["SaveCoverAsync()"]]
    class_lhjxtl_ibookstorageservice -->|contains| method_1bjnsl7_saveebookasync
    class_lhjxtl_ibookstorageservice -->|contains| method_1cxlt22_saveebookasync
    class_lhjxtl_ibookstorageservice -->|contains| method_1pww9i7_savecoverasync
    class_lhjxtl_ibookstorageservice -->|contains| method_1sosafx_savecoverasync
```

## Diagram Validation

- Status: pass
