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using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Pathoschild.Http.Client;
using StardewModdingAPI.Toolkit;
using StardewModdingAPI.Web.Framework.Clients.CurseForge.ResponseModels;
namespace StardewModdingAPI.Web.Framework.Clients.CurseForge
{
/// <summary>An HTTP client for fetching mod metadata from the CurseForge API.</summary>
internal class CurseForgeClient : ICurseForgeClient
{
/*********
** Fields
*********/
/// <summary>The underlying HTTP client.</summary>
private readonly IClient Client;
/// <summary>A regex pattern which matches a version number in a CurseForge mod file name.</summary>
private readonly Regex VersionInNamePattern = new Regex(@"^(?:.+? | *)v?(\d+\.\d+(?:\.\d+)?(?:-.+?)?) *(?:\.(?:zip|rar|7z))?$", RegexOptions.Compiled);
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="userAgent">The user agent for the API client.</param>
/// <param name="apiUrl">The base URL for the CurseForge API.</param>
public CurseForgeClient(string userAgent, string apiUrl)
{
this.Client = new FluentClient(apiUrl).SetUserAgent(userAgent);
}
/// <summary>Get metadata about a mod.</summary>
/// <param name="id">The CurseForge mod ID.</param>
/// <returns>Returns the mod info if found, else <c>null</c>.</returns>
public async Task<CurseForgeMod> GetModAsync(long id)
{
// get raw data
ModModel mod = await this.Client
.GetAsync($"addon/{id}")
.As<ModModel>();
if (mod == null)
return null;
// get latest versions
string invalidVersion = null;
ISemanticVersion latest = null;
foreach (ModFileModel file in mod.LatestFiles)
{
// extract version
ISemanticVersion version;
{
string raw = this.GetRawVersion(file);
if (raw == null)
continue;
if (!SemanticVersion.TryParse(raw, out version))
{
if (invalidVersion == null)
invalidVersion = raw;
continue;
}
}
// track latest version
if (latest == null || version.IsNewerThan(latest))
latest = version;
}
// get error
string error = null;
if (latest == null && invalidVersion == null)
{
error = mod.LatestFiles.Any()
? $"CurseForge mod {id} has no downloads which specify the version in a recognised format."
: $"CurseForge mod {id} has no downloads.";
}
// generate result
return new CurseForgeMod
{
Name = mod.Name,
LatestVersion = latest?.ToString() ?? invalidVersion,
Url = mod.WebsiteUrl,
Error = error
};
}
/// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
public void Dispose()
{
this.Client?.Dispose();
}
/*********
** Private methods
*********/
/// <summary>Get a raw version string for a mod file, if available.</summary>
/// <param name="file">The file whose version to get.</param>
private string GetRawVersion(ModFileModel file)
{
Match match = this.VersionInNamePattern.Match(file.DisplayName);
if (!match.Success)
match = this.VersionInNamePattern.Match(file.FileName);
return match.Success
? match.Groups[1].Value
: null;
}
}
}
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