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using System;
using System.IO;
using Newtonsoft.Json;
using StardewModdingAPI.Advanced;
namespace StardewModdingAPI.Framework.Serialisation
{
/// <summary>Encapsulates SMAPI's JSON file parsing.</summary>
internal class JsonHelper
{
/*********
** Accessors
*********/
/// <summary>The JSON settings to use when serialising and deserialising files.</summary>
private readonly JsonSerializerSettings JsonSettings = new JsonSerializerSettings
{
Formatting = Formatting.Indented,
ObjectCreationHandling = ObjectCreationHandling.Replace // avoid issue where default ICollection<T> values are duplicated each time the config is loaded
};
/*********
** Public methods
*********/
/// <summary>Read a JSON file.</summary>
/// <typeparam name="TModel">The model type.</typeparam>
/// <param name="fullPath">The absolete file path.</param>
/// <param name="modHelper">The mod helper to inject for <see cref="IConfigFile"/> instances.</param>
/// <returns>Returns the deserialised model, or <c>null</c> if the file doesn't exist or is empty.</returns>
public TModel ReadJsonFile<TModel>(string fullPath, IModHelper modHelper)
where TModel : class
{
// read file
string json;
try
{
json = File.ReadAllText(fullPath);
}
catch (Exception ex) when (ex is DirectoryNotFoundException || ex is FileNotFoundException)
{
return null;
}
// deserialise model
TModel model = JsonConvert.DeserializeObject<TModel>(json, this.JsonSettings);
if (model is IConfigFile)
{
var wrapper = (IConfigFile)model;
wrapper.ModHelper = modHelper;
wrapper.FilePath = fullPath;
}
return model;
}
/// <summary>Save to a JSON file.</summary>
/// <typeparam name="TModel">The model type.</typeparam>
/// <param name="fullPath">The absolete file path.</param>
/// <param name="model">The model to save.</param>
public void WriteJsonFile<TModel>(string fullPath, TModel model)
where TModel : class
{
// create directory if needed
string dir = Path.GetDirectoryName(fullPath);
if (!Directory.Exists(dir))
Directory.CreateDirectory(dir);
// write file
string json = JsonConvert.SerializeObject(model, this.JsonSettings);
File.WriteAllText(fullPath, json);
}
}
}
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