ProSol.Html.TagsProvider/Readme.md

# ProSol.Html.TagsProvider

TagsProvider is a tool for extracting HTML tags from a string, in event-driven way.
Helps to extract text, structured data, from a specific site. 

## How to use?

Install the package:
```sh
dotnet add package ProSol.Html.TagsProvider
```

Make an Observer:
```csharp
internal class ConsoleLogObserver : IObserver<TagsProviderMessage>
{
    public void OnCompleted() { }

    public void OnError(Exception error) { }

    public void OnNext(TagsProviderMessage value) 
    {
        Console.WriteLine(value.CurrentTag.TagInfo.Name);
    }
}
```

Run the TagsProvider:
```csharp
var provider = new TagsProvider();
using var unsub = provider.Subscribe(new ConsoleLogObserver());
provider.Process("<div> <span> </span> </div>");
```

Get the output:
```
span
div
```

That's it! 
The provider notifies about any tag met and its data: 
- name, 
- range of entire tag, 
- range of inner content.

More demos [here](https://git.disroot.org/alexenko/Demos/src/branch/master/ProSol.TagsProvider).