EventDescriptor.cs

// <copyright file="EventDescriptor.cs" company="Selenium Committers">
// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
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// regarding copyright ownership.  The SFC licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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using System.Text.Json.Serialization.Metadata;

namespace OpenQA.Selenium.BiDi;

public abstract class EventDescriptor
{
    public string Name { get; }

    internal abstract JsonTypeInfo? JsonTypeInfo { get; }
    internal abstract Func<IBiDi, object, EventArgs>? ArgsFactory { get; }

    private protected EventDescriptor(string name)
    {
        Name = name;
    }
}

public sealed class EventDescriptor<TEventArgs> : EventDescriptor
    where TEventArgs : EventArgs
{
    internal override JsonTypeInfo? JsonTypeInfo { get; }
    internal override Func<IBiDi, object, EventArgs>? ArgsFactory { get; }

    internal EventDescriptor(string name) : base(name) { }

    private EventDescriptor(string name, JsonTypeInfo jsonTypeInfo, Func<IBiDi, object, EventArgs> argsFactory) : base(name)
    {
        JsonTypeInfo = jsonTypeInfo;
        ArgsFactory = argsFactory;
    }

    public static EventDescriptor<TEventArgs> Create<TEventParams>(
        string name,
        Func<IBiDi, TEventParams, TEventArgs> factory,
        JsonTypeInfo<TEventParams> jsonTypeInfo)
    {
        return new(name, jsonTypeInfo, (bidi, ep) => factory(bidi, (TEventParams)ep));
    }
}