65 lines
2.6 KiB
C#
65 lines
2.6 KiB
C#
using System;
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using System.IO;
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using UnityEngine;
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namespace ProjectM.Simulation
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{
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/// <summary>
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/// Host-local persistence for the game save slice (<see cref="SaveData"/>) — single slot, versioned JSON at
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/// <c>Application.persistentDataPath/save_0.json</c>, atomic writes (temp + <c>File.Replace</c>). Read by the
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/// menu (to offer "Continue" + stage a <see cref="PendingSave"/>) and the server SaveWriteSystem (autosave).
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/// JsonUtility keeps it dependency-free. Returns null on a missing / corrupt / version-mismatched file —
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/// never throws to callers (a bad save degrades to "New Game", it never crashes boot).
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/// </summary>
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public static class SaveService
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{
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static string FilePath => Path.Combine(Application.persistentDataPath, "save_0.json");
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public static bool HasSave() => File.Exists(FilePath);
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public static SaveData Load()
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{
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try
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{
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if (!File.Exists(FilePath)) return null;
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var data = JsonUtility.FromJson<SaveData>(File.ReadAllText(FilePath));
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// EB-1: additive floor [MinLoadableVersion, CurrentVersion] so OLD v2 saves still load (a missing HP
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// field 0-defaults and the restore guard maps 0 -> baked Max); v0/v1 garbage is still rejected.
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if (data == null || data.Version < SaveData.MinLoadableVersion || data.Version > SaveData.CurrentVersion) return null;
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data.Ledger ??= Array.Empty<LedgerRow>();
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data.MetaUpgrades ??= Array.Empty<MetaUpgradeSave>(); // v6: null on any v<=5 file();
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return data;
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}
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catch (Exception e)
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{
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Debug.LogWarning($"[SaveService] Load failed ({e.Message}); treating as no save.");
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return null;
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}
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}
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public static void Save(SaveData data)
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{
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if (data == null) return;
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data.Version = SaveData.CurrentVersion;
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try
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{
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var json = JsonUtility.ToJson(data, true);
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var tmp = FilePath + ".tmp";
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File.WriteAllText(tmp, json);
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if (File.Exists(FilePath)) File.Replace(tmp, FilePath, null);
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else File.Move(tmp, FilePath);
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}
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catch (Exception e)
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{
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Debug.LogWarning($"[SaveService] Save failed: {e.Message}");
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}
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}
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public static void Delete()
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{
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try { if (File.Exists(FilePath)) File.Delete(FilePath); }
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catch (Exception e) { Debug.LogWarning($"[SaveService] Delete failed: {e.Message}"); }
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}
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}
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}
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