dotnet/src/webdriver/BiDi/BrowsingContext/DownloadEndEvent.cs

// <copyright file="DownloadEndEvent.cs" company="Selenium Committers">
// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// 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
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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// KIND, either express or implied.  See the License for the
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using System.Text.Json;
using System.Text.Json.Serialization;
using OpenQA.Selenium.BiDi.Json;
using OpenQA.Selenium.BiDi.Json.Converters;

namespace OpenQA.Selenium.BiDi.BrowsingContext;

[JsonConverter(typeof(DownloadEndEventArgsConverter))]
public abstract record DownloadEndEventArgs(
    BrowsingContext Context)
    : EventArgs;

public sealed record DownloadCanceledEventArgs(
    Download Download,
    BrowsingContext Context,
    Navigation? Navigation,
    [property: JsonConverter(typeof(DateTimeOffsetConverter))] DateTimeOffset Timestamp,
    string Url)
    : DownloadEndEventArgs(Context), IBaseNavigationInfo;

public sealed record DownloadCompleteEventArgs(
    Download Download,
    string? Filepath,
    BrowsingContext Context,
    Navigation? Navigation,
    [property: JsonConverter(typeof(DateTimeOffsetConverter))] DateTimeOffset Timestamp,
    string Url)
    : DownloadEndEventArgs(Context), IBaseNavigationInfo;

internal class DownloadEndEventArgsConverter : JsonConverter<DownloadEndEventArgs>
{
    public override DownloadEndEventArgs? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        return reader.GetDiscriminator("status") switch
        {
            "canceled" => JsonSerializer.Deserialize(ref reader, options.GetTypeInfo<DownloadCanceledEventArgs>()),
            "complete" => JsonSerializer.Deserialize(ref reader, options.GetTypeInfo<DownloadCompleteEventArgs>()),
            _ => null,
        };
    }

    public override void Write(Utf8JsonWriter writer, DownloadEndEventArgs value, JsonSerializerOptions options)
    {
        throw new NotImplementedException();
    }
}