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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Caching.Memory;
using Microsoft.Extensions.Options;
using StardewModdingAPI.Common.Models;
using StardewModdingAPI.Web.Framework.Clients.Chucklefish;
using StardewModdingAPI.Web.Framework.Clients.GitHub;
using StardewModdingAPI.Web.Framework.Clients.Nexus;
using StardewModdingAPI.Web.Framework.ConfigModels;
using StardewModdingAPI.Web.Framework.ModRepositories;
namespace StardewModdingAPI.Web.Controllers
{
/// <summary>Provides an API to perform mod update checks.</summary>
[Produces("application/json")]
[Route("api/v{version:semanticVersion}/mods")]
internal class ModsApiController : Controller
{
/*********
** Properties
*********/
/// <summary>The mod repositories which provide mod metadata.</summary>
private readonly IDictionary<string, IModRepository> Repositories;
/// <summary>The cache in which to store mod metadata.</summary>
private readonly IMemoryCache Cache;
/// <summary>The number of minutes update checks should be cached before refetching them.</summary>
private readonly int CacheMinutes;
/// <summary>A regex which matches SMAPI-style semantic version.</summary>
private readonly string VersionRegex;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="cache">The cache in which to store mod metadata.</param>
/// <param name="configProvider">The config settings for mod update checks.</param>
/// <param name="chucklefish">The Chucklefish API client.</param>
/// <param name="github">The GitHub API client.</param>
/// <param name="nexus">The Nexus API client.</param>
public ModsApiController(IMemoryCache cache, IOptions<ModUpdateCheckConfig> configProvider, IChucklefishClient chucklefish, IGitHubClient github, INexusClient nexus)
{
ModUpdateCheckConfig config = configProvider.Value;
this.Cache = cache;
this.CacheMinutes = config.CacheMinutes;
this.VersionRegex = config.SemanticVersionRegex;
this.Repositories =
new IModRepository[]
{
new ChucklefishRepository(config.ChucklefishKey, chucklefish),
new GitHubRepository(config.GitHubKey, github),
new NexusRepository(config.NexusKey, nexus)
}
.ToDictionary(p => p.VendorKey, StringComparer.CurrentCultureIgnoreCase);
}
/// <summary>Fetch version metadata for the given mods.</summary>
/// <param name="modKeys">The namespaced mod keys to search as a comma-delimited array.</param>
[HttpGet]
public async Task<IDictionary<string, ModInfoModel>> GetAsync(string modKeys)
{
string[] modKeysArray = modKeys?.Split(',').ToArray();
if (modKeysArray == null || !modKeysArray.Any())
return new Dictionary<string, ModInfoModel>();
return await this.PostAsync(new ModSearchModel(modKeysArray));
}
/// <summary>Fetch version metadata for the given mods.</summary>
/// <param name="search">The mod search criteria.</param>
[HttpPost]
public async Task<IDictionary<string, ModInfoModel>> PostAsync([FromBody] ModSearchModel search)
{
// sort & filter keys
string[] modKeys = (search?.ModKeys?.ToArray() ?? new string[0])
.Distinct(StringComparer.CurrentCultureIgnoreCase)
.OrderBy(p => p, StringComparer.CurrentCultureIgnoreCase)
.ToArray();
// fetch mod info
IDictionary<string, ModInfoModel> result = new Dictionary<string, ModInfoModel>(StringComparer.CurrentCultureIgnoreCase);
foreach (string modKey in modKeys)
{
// parse mod key
if (!this.TryParseModKey(modKey, out string vendorKey, out string modID))
{
result[modKey] = new ModInfoModel("The mod key isn't in a valid format. It should contain the site key and mod ID like 'Nexus:541'.");
continue;
}
// get matching repository
if (!this.Repositories.TryGetValue(vendorKey, out IModRepository repository))
{
result[modKey] = new ModInfoModel($"There's no mod site with key '{vendorKey}'. Expected one of [{string.Join(", ", this.Repositories.Keys)}].");
continue;
}
// fetch mod info
result[modKey] = await this.Cache.GetOrCreateAsync($"{repository.VendorKey}:{modID}".ToLower(), async entry =>
{
entry.AbsoluteExpiration = DateTimeOffset.UtcNow.AddMinutes(this.CacheMinutes);
ModInfoModel info = await repository.GetModInfoAsync(modID);
if (info.Error == null && (info.Version == null || !Regex.IsMatch(info.Version, this.VersionRegex, RegexOptions.CultureInvariant | RegexOptions.IgnoreCase)))
info = new ModInfoModel(info.Name, info.Version, info.Url, info.Version == null ? "Mod has no version number." : $"Mod has invalid semantic version '{info.Version}'.");
return info;
});
}
return result;
}
/*********
** Private methods
*********/
/// <summary>Parse a namespaced mod ID.</summary>
/// <param name="raw">The raw mod ID to parse.</param>
/// <param name="vendorKey">The parsed vendor key.</param>
/// <param name="modID">The parsed mod ID.</param>
/// <returns>Returns whether the value could be parsed.</returns>
private bool TryParseModKey(string raw, out string vendorKey, out string modID)
{
// split parts
string[] parts = raw?.Split(':');
if (parts == null || parts.Length != 2)
{
vendorKey = null;
modID = null;
return false;
}
// parse
vendorKey = parts[0].Trim();
modID = parts[1].Trim();
return true;
}
}
}
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