Dart implementation of https://github.com/microsoft/kiota-serialization-json-dotnet

Can you also add @andrueastman to this repo please? He will be able to take over the reviews when I'm absent.
Thanks!

Most tool authors recommend adding generated files to the .gitignore.

Working on a large project with lots of generated files checked into git, I can tell why: having generated files (or even lockfiles) in version control causes noisy commits.

Therefore I want to remove all generated files from all packages.
Currently, this only includes the *.mocks.dart files for the tests, but I'm sure there will be other purposes (like in #20 the package version).

this way they are reusable for the response headers which means we can use it in things like observability or interception options
https://github.com/ricardoboss/dart_kiota_abstractions/blob/63b687ad9d738cb4a66ab96bca90c23dda26a325/lib/src/request_headers.dart#L6

This doesn't need to be implemented in the language to start playing with the generation, but I thought I'd create an issue to track that.

not needed for generation strictly speaking, but it's more than likely that it'll be needed during the integration tests phase. Issue created for tracking purposes.

The Parsable defines a method serialize that returns a FutureOr<void> and receives a SerializationWriter.

When serializing nested objects, this serialize method gets called from within write* methods of the SerializationWriters.

The problem is that the write* methods are not asynchronous and cannot await the FutureOr<void> returned from the serialize method of the Parsable.

To mitigate this, I want to rewrite all write* methods in the serialization writers to be asynchronous.

As many other Kiota implementations, this repository will host the abstractions alongside some implementations for those.

Currently, the repository only hosts the kiota_abstractions package.
In the future, other packages might be added to this repository, for example:

• kiota_http: Implements an API client using the Dart http package
• kiota_dio: Implements an API client using dio
• kiota_serialization_json: Implements JSON serialization using any approach described in the flutter docs (TBD)
• kiota_serialization_form: Implements form serialization
• kiota_serialization_text: Implements text serialization
• kiota_serialization_multipart: Implements multipart serialization

Dart implementation of https://github.com/microsoft/kiota-serialization-form-dotnet

• #19
• #21
• #25
• #27
• #28

If passing generic types and instantiating generic types from the generic type parameter is possible in Dart without using reflection this is something we might consider. It helps reducing the amount of code needed to be generated.

https://github.com/microsoft/kiota-typescript/blob/e86e70a6cc77bb58b4f5d5bac5cc6eb87dbac271/packages/abstractions/src/baseRequestBuilder.ts#L2

https://github.com/ricardoboss/dart_kiota_abstractions/blob/63b687ad9d738cb4a66ab96bca90c23dda26a325/lib/src/base_request_builder.dart#L18

Dart implementation of https://github.com/microsoft/kiota-serialization-multipart-dotnet

https://github.com/microsoft/kiota-abstractions-dotnet/blob/b98521b4e6dd1053ebfcf9bdeb0a95ead5424bf6/src/RequestInformation.cs#L51

https://github.com/ricardoboss/dart_kiota_abstractions/blob/63b687ad9d738cb4a66ab96bca90c23dda26a325/lib/src/request_information.dart#L126

For clarity if it doesn't conflict with "native platform types"
 
https://github.com/ricardoboss/dart_kiota_abstractions/blob/63b687ad9d738cb4a66ab96bca90c23dda26a325/lib/src/method.dart#L4

This is for later, but we're probably missing:

• DateOnly (or equivalent)
• TimeOnly (or equivalent)
• Guid

https://github.com/ricardoboss/dart_kiota_abstractions/blob/63b687ad9d738cb4a66ab96bca90c23dda26a325/lib/src/serialization/parse_node.dart#L20

Base issue: microsoft/kiota#4335