cleanup for webapi things

Torch.API/WebAPI/Plugin/IPluginQuery.cs

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+using System;
+using System.Threading.Tasks;
+
+namespace Torch.API.WebAPI.Plugin;
+
+public interface IPluginQuery
+{
+    Task<PluginsResponse> QueryAll();
+    Task<PluginItem> QueryOne(Guid guid);
+    Task<bool> DownloadPlugin(Guid guid, string path = null);
+    Task<bool> DownloadPlugin(PluginItem item, string path = null);
+}

Torch.API/WebAPI/Plugin/LegacyPluginQuery.cs

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+using System;
+using System.IO;
+using System.Linq;
+using System.Net.Http;
+using System.Net.Http.Json;
+using System.Threading;
+using System.Threading.Tasks;
+using NLog;
+
+namespace Torch.API.WebAPI.Plugin;
+
+public class LegacyPluginQuery : IPluginQuery
+{
+    private const string BASE_URL = "https://torchapi.com/api/plugins/";
+    private readonly HttpClient _client;
+    private static readonly Logger Log = LogManager.GetCurrentClassLogger();
+
+    private LegacyPluginQuery()
+    {
+        _client = new()
+        {
+            BaseAddress = new(BASE_URL)
+        };
+    }
+    
+    public static LegacyPluginQuery Instance { get; } = new();
+
+    public async Task<PluginsResponse> QueryAll()
+    {
+        return await _client.GetFromJsonAsync<PluginsResponse>("/", CancellationToken.None);
+    }
+
+    public async Task<PluginItem> QueryOne(Guid guid)
+    {
+        using var res = await _client.GetAsync($"/search/{guid}");
+        if (!res.IsSuccessStatusCode)
+            return null;
+        return await res.Content.ReadFromJsonAsync<PluginItem>();
+    }
+
+    public async Task<bool> DownloadPlugin(Guid guid, string path = null)
+    {
+        var item = await QueryOne(guid);
+        if (item is null) return false;
+        return await DownloadPlugin(item, path);
+    }
+
+    public async Task<bool> DownloadPlugin(PluginItem item, string path = null)
+    {
+        try
+        {
+            path ??= Path.Combine(AppContext.BaseDirectory, "Plugins", $"{item.Name}.zip");
+                
+            if (item.Versions.Length == 0)
+            {
+                Log.Error($"Selected plugin {item.Name} does not have any versions to download!");
+                return false;
+            }
+            var version = item.Versions.FirstOrDefault(v => v.Version == item.LatestVersion);
+            if (version is null)
+            {
+                Log.Error($"Could not find latest version for selected plugin {item.Name}");
+                return false;
+            }
+            var s = await _client.GetStreamAsync(version.Url);
+
+            if(File.Exists(path))
+                File.Delete(path);
+
+            await using var f = File.Create(path);
+            await s.CopyToAsync(f);
+        }
+        catch (Exception ex)
+        {
+            Log.Error(ex, "Failed to download plugin!");
+            return false;
+        }
+
+        return true;
+    }
+}

Torch.API/WebAPI/Plugin/PluginItem.cs

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+using System;
+using System.Text.Json.Serialization;
+
+namespace Torch.API.WebAPI.Plugin;
+
+public record PluginItem(Guid Id, string Name, string Author, string Description, string LatestVersion,
+                         VersionItem[] Versions)
+{
+    [JsonIgnore]
+    public bool Installed { get; set; }
+}

Torch.API/WebAPI/Plugin/PluginsResponse.cs

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+namespace Torch.API.WebAPI.Plugin;
+
+public record PluginsResponse(PluginItem[] Plugins);

Torch.API/WebAPI/Plugin/VersionItem.cs

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+using System.Text.Json.Serialization;
+
+namespace Torch.API.WebAPI.Plugin;
+
+public record VersionItem(string Version, string Note, [property: JsonPropertyName("is_beta")] bool IsBeta,
+                          string Url);