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using System;
using System.Net;
using System.Threading.Tasks;
using HtmlAgilityPack;
using Pathoschild.Http.Client;
using StardewModdingAPI.Toolkit.Framework.UpdateData;
namespace StardewModdingAPI.Web.Framework.Clients.Chucklefish
{
/// <summary>An HTTP client for fetching mod metadata from the Chucklefish mod site.</summary>
internal class ChucklefishClient : IChucklefishClient
{
/*********
** Fields
*********/
/// <summary>The URL for a mod page excluding the base URL, where {0} is the mod ID.</summary>
private readonly string ModPageUrlFormat;
/// <summary>The underlying HTTP client.</summary>
private readonly IClient Client;
/*********
** Accessors
*********/
/// <summary>The unique key for the mod site.</summary>
public ModSiteKey SiteKey => ModSiteKey.Chucklefish;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="userAgent">The user agent for the API client.</param>
/// <param name="baseUrl">The base URL for the Chucklefish mod site.</param>
/// <param name="modPageUrlFormat">The URL for a mod page excluding the <paramref name="baseUrl"/>, where {0} is the mod ID.</param>
public ChucklefishClient(string userAgent, string baseUrl, string modPageUrlFormat)
{
this.ModPageUrlFormat = modPageUrlFormat;
this.Client = new FluentClient(baseUrl).SetUserAgent(userAgent);
}
/// <summary>Get update check info about a mod.</summary>
/// <param name="id">The mod ID.</param>
public async Task<IModPage> GetModData(string id)
{
IModPage page = new GenericModPage(this.SiteKey, id);
// get mod ID
if (!uint.TryParse(id, out uint parsedId))
return page.SetError(RemoteModStatus.DoesNotExist, $"The value '{id}' isn't a valid Chucklefish mod ID, must be an integer ID.");
// fetch HTML
string html;
try
{
html = await this.Client
.GetAsync(string.Format(this.ModPageUrlFormat, parsedId))
.AsString();
}
catch (ApiException ex) when (ex.Status == HttpStatusCode.NotFound || ex.Status == HttpStatusCode.Forbidden)
{
return page.SetError(RemoteModStatus.DoesNotExist, "Found no Chucklefish mod with this ID.");
}
var doc = new HtmlDocument();
doc.LoadHtml(html);
// extract mod info
string url = this.GetModUrl(parsedId);
string version = doc.DocumentNode.SelectSingleNode("//h1/span")?.InnerText;
string name = doc.DocumentNode.SelectSingleNode("//h1").ChildNodes[0].InnerText.Trim();
if (name.StartsWith("[SMAPI]"))
name = name.Substring("[SMAPI]".Length).TrimStart();
// return info
return page.SetInfo(name: name, version: version, url: url, downloads: Array.Empty<IModDownload>());
}
/// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
public void Dispose()
{
this.Client?.Dispose();
}
/*********
** Private methods
*********/
/// <summary>Get the full mod page URL for a given ID.</summary>
/// <param name="id">The mod ID.</param>
private string GetModUrl(uint id)
{
UriBuilder builder = new(this.Client.BaseClient.BaseAddress);
builder.Path += string.Format(this.ModPageUrlFormat, id);
return builder.Uri.ToString();
}
}
}
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