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using System.Collections.Generic;
using StardewModdingAPI.Framework.Reflection;
namespace StardewModdingAPI.Framework.ModHelpers
{
/// <summary>Provides metadata about installed mods.</summary>
internal class ModRegistryHelper : BaseHelper, IModRegistry
{
/*********
** Fields
*********/
/// <summary>The underlying mod registry.</summary>
private readonly ModRegistry Registry;
/// <summary>Encapsulates monitoring and logging for the mod.</summary>
private readonly IMonitor Monitor;
/// <summary>The mod IDs for APIs accessed by this instanced.</summary>
private readonly HashSet<string> AccessedModApis = new HashSet<string>();
/// <summary>Generates proxy classes to access mod APIs through an arbitrary interface.</summary>
private readonly InterfaceProxyFactory ProxyFactory;
/*********
** Public methods
*********/
/// <summary>Construct an instance.</summary>
/// <param name="modID">The unique ID of the relevant mod.</param>
/// <param name="registry">The underlying mod registry.</param>
/// <param name="proxyFactory">Generates proxy classes to access mod APIs through an arbitrary interface.</param>
/// <param name="monitor">Encapsulates monitoring and logging for the mod.</param>
public ModRegistryHelper(string modID, ModRegistry registry, InterfaceProxyFactory proxyFactory, IMonitor monitor)
: base(modID)
{
this.Registry = registry;
this.ProxyFactory = proxyFactory;
this.Monitor = monitor;
}
/// <summary>Get metadata for all loaded mods.</summary>
public IEnumerable<IModInfo> GetAll()
{
return this.Registry.GetAll();
}
/// <summary>Get metadata for a loaded mod.</summary>
/// <param name="uniqueID">The mod's unique ID.</param>
/// <returns>Returns the matching mod's metadata, or <c>null</c> if not found.</returns>
public IModInfo Get(string uniqueID)
{
return this.Registry.Get(uniqueID);
}
/// <summary>Get whether a mod has been loaded.</summary>
/// <param name="uniqueID">The mod's unique ID.</param>
public bool IsLoaded(string uniqueID)
{
return this.Registry.Get(uniqueID) != null;
}
/// <summary>Get the API provided by a mod, or <c>null</c> if it has none. This signature requires using the <see cref="IModHelper.Reflection"/> API to access the API's properties and methods.</summary>
public object GetApi(string uniqueID)
{
// validate ready
if (!this.Registry.AreAllModsInitialized)
{
this.Monitor.Log("Tried to access a mod-provided API before all mods were initialized.", LogLevel.Error);
return null;
}
// get raw API
IModMetadata mod = this.Registry.Get(uniqueID);
if (mod?.Api != null && this.AccessedModApis.Add(mod.Manifest.UniqueID))
this.Monitor.Log($"Accessed mod-provided API for {mod.DisplayName}.", LogLevel.Trace);
return mod?.Api;
}
/// <summary>Get the API provided by a mod, mapped to a given interface which specifies the expected properties and methods. If the mod has no API or it's not compatible with the given interface, get <c>null</c>.</summary>
/// <typeparam name="TInterface">The interface which matches the properties and methods you intend to access.</typeparam>
/// <param name="uniqueID">The mod's unique ID.</param>
public TInterface GetApi<TInterface>(string uniqueID) where TInterface : class
{
// get raw API
object api = this.GetApi(uniqueID);
if (api == null)
return null;
// validate mapping
if (!typeof(TInterface).IsInterface)
{
this.Monitor.Log($"Tried to map a mod-provided API to class '{typeof(TInterface).FullName}'; must be a public interface.", LogLevel.Error);
return null;
}
if (!typeof(TInterface).IsPublic)
{
this.Monitor.Log($"Tried to map a mod-provided API to non-public interface '{typeof(TInterface).FullName}'; must be a public interface.", LogLevel.Error);
return null;
}
// get API of type
if (api is TInterface castApi)
return castApi;
return this.ProxyFactory.CreateProxy<TInterface>(api, this.ModID, uniqueID);
}
}
}
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