Add Blazor WASM Support for OrchardCore.Localization.Core

[BrunoJuchli]

Is your feature request related to a problem? Please describe.

After installing OrchardCore.Localization.Core into a .net 8 Blazor WASM project I get the following error:

Error NETSDK1082 : There was no runtime pack for Microsoft.AspNetCore.App available for the specified RuntimeIdentifier 'browser-wasm'

This is due to the <FrameworkReference Include="Microsoft.AspNetCore.App" /> in the csproj.

Without this reference, there is no HtmlLocalizer and also no data annotations localization - these are not supported in Blazor WASM.

Furthermore, the setup in LocalizationServiceCollectionExtensions.AddPortableObjectLocalization doesn't work for Blazor WASM since - as far as I found - it doesn't support local files. So using ContentRootPoFileLocationProvider makes no sense.

Also, for

Describe the solution you'd like

Split the assemblies/ nuget packages so that

• OrchardCore.Localization.Core
  • provides localization via PortableObjectStringLocalizer
  • possibly features something like LocalizationServiceCollectionExtensions.AddPortableObjectLocalization, but doesn't register ITranslationProvider because how this works depends on where you use it in
• OrchardCore.Localization.Mvc
  • provides localization via PortableObjectHtmlLocalizer and for data annotations
  • depends on OrchardCore.Localization.Core (to provide PortableObjectStringLocalizer).
  • provides LocalizationServiceCollectionExtensions (move them here).

Describe alternatives you've considered

Varying on what I've wrote above, the aspect of where is the PO file retrieved from could made pluggable, and a choice of:

• from file
  • ... option of root dir location
• from web address

could be offered.

Notes

As an experiment, I've removed the `<FrameworkReference Include="Microsoft.AspNetCore.App" /> and all types that fail to compile then. I've also had to plug in a customized ITranslationProvider because so as to load the PO files from the web server (via HttpClient) instead of from a local file (I don't think these are availabel in Blazor WASM - at least i couldn't find a way to include these...). This way I got it working.

[hishamco]

As you know OC started before Blazor was a thing :) we might investigate into Blazor support, especially for Core APIs

/cc @sebastienros @Skrypt

[Skrypt]

You can create a Pull Request with your suggested changes that will be easier to review. Then, also, what @hishamco said. This was not designed with Blazor in mind as it happened after.