64 lines
2.1 KiB
C#
64 lines
2.1 KiB
C#
using System.IO;
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using UnityEngine;
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namespace ES3Internal
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{
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internal class ES3PlayerPrefsStream : MemoryStream
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{
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private string path;
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private bool append;
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private bool isWriteStream = false;
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private bool isDisposed = false;
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// This constructor should be used for read streams only.
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public ES3PlayerPrefsStream(string path) : base(GetData(path,false))
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{
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this.path = path;
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this.append = false;
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}
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// This constructor should be used for write streams only.
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public ES3PlayerPrefsStream(string path, int bufferSize, bool append=false) : base(bufferSize)
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{
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this.path = path;
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this.append = append;
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this.isWriteStream = true;
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}
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private static byte[] GetData(string path, bool isWriteStream)
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{
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if(!PlayerPrefs.HasKey(path))
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throw new FileNotFoundException("File \""+path+"\" could not be found in PlayerPrefs");
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return System.Convert.FromBase64String(PlayerPrefs.GetString(path));
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}
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protected override void Dispose (bool disposing)
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{
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if(isDisposed)
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return;
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isDisposed = true;
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if(isWriteStream && this.Length > 0)
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{
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if (append)
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{
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// Convert data back to bytes before appending, as appending Base-64 strings directly can corrupt the data.
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var sourceBytes = System.Convert.FromBase64String(PlayerPrefs.GetString(path));
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var appendBytes = this.ToArray();
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var finalBytes = new byte[sourceBytes.Length + appendBytes.Length];
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System.Buffer.BlockCopy(sourceBytes, 0, finalBytes, 0, sourceBytes.Length);
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System.Buffer.BlockCopy(appendBytes, 0, finalBytes, sourceBytes.Length, appendBytes.Length);
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PlayerPrefs.SetString(path, System.Convert.ToBase64String(finalBytes));
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PlayerPrefs.Save();
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}
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else
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PlayerPrefs.SetString(path + ES3IO.temporaryFileSuffix, System.Convert.ToBase64String(this.ToArray()));
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// Save the timestamp to a separate key.
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PlayerPrefs.SetString("timestamp_" + path, System.DateTime.UtcNow.Ticks.ToString());
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}
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base.Dispose(disposing);
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}
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}
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}
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