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path: root/src/SMAPI/Framework/ModHelpers/GameContentHelper.cs
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using System;
using System.Linq;
using StardewModdingAPI.Framework.Content;
using StardewModdingAPI.Framework.ContentManagers;
using StardewModdingAPI.Framework.Exceptions;
using StardewValley;

namespace StardewModdingAPI.Framework.ModHelpers
{
    /// <inheritdoc cref="IGameContentHelper"/>
    internal class GameContentHelper : BaseHelper, IGameContentHelper
    {
        /*********
        ** Fields
        *********/
        /// <summary>SMAPI's core content logic.</summary>
        private readonly ContentCoordinator ContentCore;

        /// <summary>The underlying game content manager.</summary>
        private readonly IContentManager GameContentManager;

        /// <summary>The friendly mod name for use in errors.</summary>
        private readonly string ModName;

        /// <summary>Encapsulates monitoring and logging.</summary>
        private readonly IMonitor Monitor;


        /*********
        ** Accessors
        *********/
        /// <inheritdoc />
        public string CurrentLocale => this.GameContentManager.GetLocale();

        /// <inheritdoc />
        public LocalizedContentManager.LanguageCode CurrentLocaleConstant => this.GameContentManager.Language;


        /*********
        ** Public methods
        *********/
        /// <summary>Construct an instance.</summary>
        /// <param name="contentCore">SMAPI's core content logic.</param>
        /// <param name="modID">The unique ID of the relevant mod.</param>
        /// <param name="modName">The friendly mod name for use in errors.</param>
        /// <param name="monitor">Encapsulates monitoring and logging.</param>
        public GameContentHelper(ContentCoordinator contentCore, string modID, string modName, IMonitor monitor)
            : base(modID)
        {
            string managedAssetPrefix = contentCore.GetManagedAssetPrefix(modID);

            this.ContentCore = contentCore;
            this.GameContentManager = contentCore.CreateGameContentManager(managedAssetPrefix + ".content");
            this.ModName = modName;
            this.Monitor = monitor;
        }

        /// <inheritdoc />
        public IAssetName ParseAssetName(string rawName)
        {
            return this.ContentCore.ParseAssetName(rawName);
        }

        /// <inheritdoc />
        public T Load<T>(string key)
        {
            IAssetName assetName = this.ContentCore.ParseAssetName(key);
            return this.Load<T>(assetName);
        }

        /// <inheritdoc />
        public T Load<T>(IAssetName assetName)
        {
            try
            {
                return this.GameContentManager.LoadLocalized<T>(assetName, this.CurrentLocaleConstant, useCache: false);
            }
            catch (Exception ex) when (ex is not SContentLoadException)
            {
                throw new SContentLoadException($"{this.ModName} failed loading content asset '{assetName}' from the game content.", ex);
            }
        }

        /// <inheritdoc />
        public bool InvalidateCache(string key)
        {
            IAssetName assetName = this.ParseAssetName(key);
            return this.InvalidateCache(assetName);
        }

        /// <inheritdoc />
        public bool InvalidateCache(IAssetName assetName)
        {
            this.Monitor.Log($"Requested cache invalidation for '{assetName}'.");
            return this.ContentCore.InvalidateCache(asset => asset.Name.IsEquivalentTo(assetName)).Any();
        }

        /// <inheritdoc />
        public bool InvalidateCache<T>()
        {
            this.Monitor.Log($"Requested cache invalidation for all assets of type {typeof(T)}. This is an expensive operation and should be avoided if possible.");
            return this.ContentCore.InvalidateCache((_, _, type) => typeof(T).IsAssignableFrom(type)).Any();
        }

        /// <inheritdoc />
        public bool InvalidateCache(Func<IAssetInfo, bool> predicate)
        {
            this.Monitor.Log("Requested cache invalidation for all assets matching a predicate.");
            return this.ContentCore.InvalidateCache(predicate).Any();
        }

        /// <inheritdoc />
        public IAssetData GetPatchHelper<T>(T data, string assetName = null)
        {
            if (data == null)
                throw new ArgumentNullException(nameof(data), "Can't get a patch helper for a null value.");

            assetName ??= $"temp/{Guid.NewGuid():N}";

            return new AssetDataForObject(this.CurrentLocale, this.ContentCore.ParseAssetName(assetName), data, key => this.ParseAssetName(key).Name);
        }

        /// <summary>Get the underlying game content manager.</summary>
        internal IContentManager GetUnderlyingContentManager()
        {
            return this.GameContentManager;
        }
    }
}