start testing cloud service implementation

MetaforceInstaller.Cloud/Implementations/MailRu/DTO/CloudObjectResponse.cs

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+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MetaforceInstaller.Cloud.Implementations.MailRu.DTO;
+
+public sealed class CloudObjectsResponse
+{
+    [JsonPropertyName("count")]
+    public CountInfo? Count { get; init; }
+
+    [JsonPropertyName("name")]
+    public string? Name { get; init; }
+
+    [JsonPropertyName("weblink")]
+    public string? WebLink { get; init; }
+
+    [JsonPropertyName("size")]
+    public long? Size { get; init; }
+
+    [JsonPropertyName("rev")]
+    public long? Rev { get; init; }
+
+    [JsonPropertyName("kind")]
+    public string? Kind { get; init; }
+
+    [JsonPropertyName("type")]
+    public string? Type { get; init; }
+
+    [JsonPropertyName("public")]
+    public PublicInfo? Public { get; init; }
+
+    [JsonPropertyName("list")]
+    public List<CloudObjectBase>? List { get; init; }
+
+    [JsonPropertyName("owner")]
+    public OwnerInfo? Owner { get; init; }
+}
+
+public sealed class CountInfo
+{
+    [JsonPropertyName("folders")]
+    public int? Folders { get; init; }
+
+    [JsonPropertyName("files")]
+    public int? Files { get; init; }
+}
+
+public sealed class PublicInfo
+{
+    [JsonPropertyName("type")]
+    public string? Type { get; init; }
+
+    [JsonPropertyName("name")]
+    public string? Name { get; init; }
+
+    [JsonPropertyName("id")]
+    public string? Id { get; init; }
+
+    [JsonPropertyName("ctime")]
+    public long? CTime { get; init; }
+
+    [JsonPropertyName("views")]
+    public long? Views { get; init; }
+
+    [JsonPropertyName("downloads")]
+    public long? Downloads { get; init; }
+}
+
+public sealed class OwnerInfo
+{
+    [JsonPropertyName("email")]
+    public string? Email { get; init; }
+
+    [JsonPropertyName("user_flags")]
+    public UserFlags? UserFlags { get; init; }
+}
+
+public sealed class UserFlags
+{
+    [JsonPropertyName("PAID_ACCOUNT")]
+    public bool? PaidAccount { get; init; }
+}
+
+/// <summary>
+/// Базовый тип элемента из "list". Конкретный тип выбирается по полю "type".
+/// </summary>
+[JsonConverter(typeof(CloudObjectJsonConverter))]
+public abstract class CloudObjectBase
+{
+    [JsonPropertyName("name")]
+    public string? Name { get; init; }
+
+    [JsonPropertyName("weblink")]
+    public string? WebLink { get; init; }
+
+    [JsonPropertyName("size")]
+    public long? Size { get; init; }
+
+    [JsonPropertyName("kind")]
+    public string? Kind { get; init; }
+
+    [JsonPropertyName("type")]
+    public string? Type { get; init; }
+}
+
+public sealed class CloudFolderObject : CloudObjectBase
+{
+    [JsonPropertyName("count")]
+    public CountInfo? Count { get; init; }
+
+    [JsonPropertyName("rev")]
+    public long? Rev { get; init; }
+}
+
+public sealed class CloudFileObject : CloudObjectBase
+{
+    [JsonPropertyName("mtime")]
+    public long? MTime { get; init; }
+
+    [JsonPropertyName("hash")]
+    public string? Hash { get; init; }
+}
+
+public sealed class ZipWebLinkRequest
+{
+    [JsonPropertyName("x-email")]
+    public string XEmail { get; init; }
+    
+    [JsonPropertyName("weblink_list")]
+    public IReadOnlyList<string> WeblinkList { get; init; }
+    
+    [JsonPropertyName("name")]
+    public string Name { get; init; }
+}
+
+public sealed class ZipWebLinkResponse
+{
+    [JsonPropertyName("key")]
+    public string Key { get; init; }
+}
+
+/// <summary>
+/// Конвертер, который смотрит на поле "type" и десериализует в CloudFolderObject или CloudFileObject.
+/// </summary>
+public sealed class CloudObjectJsonConverter : JsonConverter<CloudObjectBase>
+{
+    public override CloudObjectBase Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+    {
+        using var doc = JsonDocument.ParseValue(ref reader);
+
+        var root = doc.RootElement;
+        if (!root.TryGetProperty("type", out var typeProp))
+            throw new JsonException("Missing required property 'type' for cloud object.");
+
+        var type = typeProp.GetString();
+
+        return type switch
+        {
+            "folder" => root.Deserialize<CloudFolderObject>(options)
+                        ?? throw new JsonException("Failed to deserialize folder object."),
+            "file" => root.Deserialize<CloudFileObject>(options)
+                      ?? throw new JsonException("Failed to deserialize file object."),
+            _ => throw new JsonException($"Unknown cloud object type '{type}'.")
+        };
+    }
+
+    public override void Write(Utf8JsonWriter writer, CloudObjectBase value, JsonSerializerOptions options)
+    {
+        switch (value)
+        {
+            case CloudFolderObject folder:
+                JsonSerializer.Serialize(writer, folder, options);
+                break;
+            case CloudFileObject file:
+                JsonSerializer.Serialize(writer, file, options);
+                break;
+            default:
+                throw new JsonException($"Unknown runtime type '{value.GetType().Name}'.");
+        }
+    }
+}