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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using StardewModdingAPI.Toolkit;
using StardewModdingAPI.Toolkit.Framework.UpdateData;
using StardewModdingAPI.Web.Framework.Clients;
namespace StardewModdingAPI.Web.Framework
{
/// <summary>Handles fetching data from mod sites.</summary>
internal class ModSiteManager
{
/*********
** Fields
*********/
/// <summary>The mod sites which provide mod metadata.</summary>
private readonly IDictionary<ModSiteKey, IModSiteClient> ModSites;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="modSites">The mod sites which provide mod metadata.</param>
public ModSiteManager(IModSiteClient[] modSites)
{
this.ModSites = modSites.ToDictionary(p => p.SiteKey);
}
/// <summary>Get the mod info for an update key.</summary>
/// <param name="updateKey">The namespaced update key.</param>
public async Task<IModPage> GetModPageAsync(UpdateKey updateKey)
{
// get site
if (!this.ModSites.TryGetValue(updateKey.Site, out IModSiteClient client))
return new GenericModPage(updateKey.Site, updateKey.ID).SetError(RemoteModStatus.DoesNotExist, $"There's no mod site with key '{updateKey.Site}'. Expected one of [{string.Join(", ", this.ModSites.Keys)}].");
// fetch mod
IModPage mod;
try
{
mod = await client.GetModData(updateKey.ID);
}
catch (Exception ex)
{
mod = new GenericModPage(updateKey.Site, updateKey.ID).SetError(RemoteModStatus.TemporaryError, ex.ToString());
}
// handle errors
return mod ?? new GenericModPage(updateKey.Site, updateKey.ID).SetError(RemoteModStatus.DoesNotExist, $"Found no {updateKey.Site} mod with ID '{updateKey.ID}'.");
}
/// <summary>Parse version info for the given mod page info.</summary>
/// <param name="page">The mod page info.</param>
/// <param name="subkey">The optional update subkey to match in available files. (If no file names or descriptions contain the subkey, it'll be ignored.)</param>
/// <param name="mapRemoteVersions">Maps remote versions to a semantic version for update checks.</param>
/// <param name="allowNonStandardVersions">Whether to allow non-standard versions.</param>
public ModInfoModel GetPageVersions(IModPage page, string subkey, bool allowNonStandardVersions, IDictionary<string, string> mapRemoteVersions)
{
// get base model
ModInfoModel model = new ModInfoModel()
.SetBasicInfo(page.Name, page.Url)
.SetError(page.Status, page.Error);
if (page.Status != RemoteModStatus.Ok)
return model;
// fetch versions
bool hasVersions = this.TryGetLatestVersions(page, subkey, allowNonStandardVersions, mapRemoteVersions, out ISemanticVersion mainVersion, out ISemanticVersion previewVersion);
if (!hasVersions && subkey != null)
hasVersions = this.TryGetLatestVersions(page, null, allowNonStandardVersions, mapRemoteVersions, out mainVersion, out previewVersion);
if (!hasVersions)
return model.SetError(RemoteModStatus.InvalidData, $"The {page.Site} mod with ID '{page.Id}' has no valid versions.");
// return info
return model.SetVersions(mainVersion, previewVersion);
}
/// <summary>Get a semantic local version for update checks.</summary>
/// <param name="version">The version to parse.</param>
/// <param name="map">A map of version replacements.</param>
/// <param name="allowNonStandard">Whether to allow non-standard versions.</param>
public ISemanticVersion GetMappedVersion(string version, IDictionary<string, string> map, bool allowNonStandard)
{
// try mapped version
string rawNewVersion = this.GetRawMappedVersion(version, map, allowNonStandard);
if (SemanticVersion.TryParse(rawNewVersion, allowNonStandard, out ISemanticVersion parsedNew))
return parsedNew;
// return original version
return SemanticVersion.TryParse(version, allowNonStandard, out ISemanticVersion parsedOld)
? parsedOld
: null;
}
/*********
** Private methods
*********/
/// <summary>Get the mod version numbers for the given mod.</summary>
/// <param name="mod">The mod to check.</param>
/// <param name="subkey">The optional update subkey to match in available files. (If no file names or descriptions contain the subkey, it'll be ignored.)</param>
/// <param name="allowNonStandardVersions">Whether to allow non-standard versions.</param>
/// <param name="mapRemoteVersions">Maps remote versions to a semantic version for update checks.</param>
/// <param name="main">The main mod version.</param>
/// <param name="preview">The latest prerelease version, if newer than <paramref name="main"/>.</param>
private bool TryGetLatestVersions(IModPage mod, string subkey, bool allowNonStandardVersions, IDictionary<string, string> mapRemoteVersions, out ISemanticVersion main, out ISemanticVersion preview)
{
main = null;
preview = null;
// parse all versions from the mod page
IEnumerable<(string name, string description, ISemanticVersion version)> GetAllVersions()
{
if (mod != null)
{
ISemanticVersion ParseAndMapVersion(string raw)
{
raw = this.NormalizeVersion(raw);
return this.GetMappedVersion(raw, mapRemoteVersions, allowNonStandardVersions);
}
// get mod version
ISemanticVersion modVersion = ParseAndMapVersion(mod.Version);
if (modVersion != null)
yield return (name: null, description: null, version: ParseAndMapVersion(mod.Version));
// get file versions
foreach (IModDownload download in mod.Downloads)
{
ISemanticVersion cur = ParseAndMapVersion(download.Version);
if (cur != null)
yield return (download.Name, download.Description, cur);
}
}
}
var versions = GetAllVersions()
.OrderByDescending(p => p.version, SemanticVersionComparer.Instance)
.ToArray();
// get main + preview versions
void TryGetVersions(out ISemanticVersion mainVersion, out ISemanticVersion previewVersion, Func<(string name, string description, ISemanticVersion version), bool> filter = null)
{
mainVersion = null;
previewVersion = null;
// get latest main + preview version
foreach (var entry in versions)
{
if (filter?.Invoke(entry) == false)
continue;
if (entry.version.IsPrerelease())
previewVersion ??= entry.version;
else
mainVersion ??= entry.version;
if (mainVersion != null)
break; // any other values will be older
}
// normalize values
if (previewVersion is not null)
{
mainVersion ??= previewVersion; // if every version is prerelease, latest one is the main version
if (!previewVersion.IsNewerThan(mainVersion))
previewVersion = null;
}
}
if (subkey is not null)
TryGetVersions(out main, out preview, entry => entry.name?.Contains(subkey, StringComparison.OrdinalIgnoreCase) == true || entry.description?.Contains(subkey, StringComparison.OrdinalIgnoreCase) == true);
if (main is null)
TryGetVersions(out main, out preview);
return main != null;
}
/// <summary>Get a semantic local version for update checks.</summary>
/// <param name="version">The version to map.</param>
/// <param name="map">A map of version replacements.</param>
/// <param name="allowNonStandard">Whether to allow non-standard versions.</param>
private string GetRawMappedVersion(string version, IDictionary<string, string> map, bool allowNonStandard)
{
if (version == null || map == null || !map.Any())
return version;
// match exact raw version
if (map.ContainsKey(version))
return map[version];
// match parsed version
if (SemanticVersion.TryParse(version, allowNonStandard, out ISemanticVersion parsed))
{
if (map.ContainsKey(parsed.ToString()))
return map[parsed.ToString()];
foreach ((string fromRaw, string toRaw) in map)
{
if (SemanticVersion.TryParse(fromRaw, allowNonStandard, out ISemanticVersion target) && parsed.Equals(target) && SemanticVersion.TryParse(toRaw, allowNonStandard, out ISemanticVersion newVersion))
return newVersion.ToString();
}
}
return version;
}
/// <summary>Normalize a version string.</summary>
/// <param name="version">The version to normalize.</param>
private string NormalizeVersion(string version)
{
if (string.IsNullOrWhiteSpace(version))
return null;
version = version.Trim();
if (Regex.IsMatch(version, @"^v\d", RegexOptions.CultureInvariant | RegexOptions.IgnoreCase)) // common version prefix
version = version.Substring(1);
return version;
}
}
}
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