Flowsy.Content 4.0.1

Flowsy Content

Foundation components for content management.

This package provides only the interfaces needed by applications to inspect document content in a uniform way, but requiring them to provide their own implementation details.

The final implementation can be powered by the toolkit best suited for every use case, such as Mime-Detective or MimeKit.

Usage

// ContentInspector.cs
// using ...
using Flowsy.Content;
// using ...

public class ContentInspector : IContentInspector
{
 public ContentDescriptor Inspect(string filePath)
 {
 ContentDescriptor descriptor;
 // Inspect the file and assign value to descriptor;
 return descriptor;
 }

 public ContentDescriptor Inspect(Stream stream, string? fileExtension = null)
 {
 ContentDescriptor descriptor;
 // Inspect the stream and assign value to descriptor;
 return descriptor;
 }
 
 public ContentDescriptor Inspect(ImmutableArray<byte> bytes, string? fileExtension = null)
 {
 ContentDescriptor descriptor;
 // Inspect the bytes and assign value to descriptor;
 return descriptor;
 }
 
 public ContentDescriptor Inspect(IEnumerable<byte> bytes, string? fileExtension = null)
 {
 ContentDescriptor descriptor;
 // Inspect the bytes and assign value to descriptor;
 return descriptor;
 }
 
 public ContentDescriptor Inspect(object content, string? fileExtension = null)
 {
 ContentDescriptor descriptor;
 // Inspect then content and assign value to descriptor;
 return descriptor;
 }
}

// using ...
using Flowsy.Content;
// using ...

public class ContentValidator
{
 private readonly IContentInspector _contentInspector;
 private readonly string _allowedTypes;
 
 public SomeService(IContentInspector _contentInspector, IEnumerable<string> allowedTypes)
 {
 _contentInspector = _contentInspector;
 _allowedTypes = allowedTypes;
 }
 
 public void ValidateContent(Stream stream)
 {
 var contentDescriptor = _contentInspector.Inspect(stream);
 var intersection = contentDescriptor.MimeTypes.Intersect(_allowedTypes);
 
 if (intersection.Count() != contentDescriptor.MimeTypes.Count())
 {
 throw new ValidationException("Invalid content type.");
 }
 }
}