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using System;
using System.Net;
using System.Threading.Tasks;
using HtmlAgilityPack;
using Pathoschild.Http.Client;
namespace StardewModdingAPI.Web.Framework.Clients.Chucklefish
{
/// <summary>An HTTP client for fetching mod metadata from the Chucklefish mod site.</summary>
internal class ChucklefishClient : IChucklefishClient
{
/*********
** Properties
*********/
/// <summary>The base URL for the Chucklefish mod site.</summary>
private readonly string BaseUrl;
/// <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;
/*********
** 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.BaseUrl = baseUrl;
this.ModPageUrlFormat = modPageUrlFormat;
this.Client = new FluentClient(baseUrl).SetUserAgent(userAgent);
}
/// <summary>Get metadata about a mod.</summary>
/// <param name="id">The Chucklefish mod ID.</param>
/// <returns>Returns the mod info if found, else <c>null</c>.</returns>
public async Task<ChucklefishMod> GetModAsync(uint id)
{
// fetch HTML
string html;
try
{
html = await this.Client
.GetAsync(string.Format(this.ModPageUrlFormat, id))
.AsString();
}
catch (ApiException ex) when (ex.Status == HttpStatusCode.NotFound)
{
return null;
}
// parse HTML
var doc = new HtmlDocument();
doc.LoadHtml(html);
// extract mod info
string url = new UriBuilder(new Uri(this.BaseUrl)) { Path = string.Format(this.ModPageUrlFormat, id) }.Uri.ToString();
string name = doc.DocumentNode.SelectSingleNode("//meta[@name='twitter:title']").Attributes["content"].Value;
if (name.StartsWith("[SMAPI] "))
name = name.Substring("[SMAPI] ".Length);
string version = doc.DocumentNode.SelectSingleNode("//h1/span").InnerText;
// create model
return new ChucklefishMod
{
Name = name,
Version = version,
Url = url
};
}
/// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
public void Dispose()
{
this.Client?.Dispose();
}
}
}
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