initial commit

2026-07-30 14:39:42 +08:00 · 2026-03-11 15:48:28 +03:00
commit 4d73f469bc
92 changed files with 166746 additions and 0 deletions
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+// Copyright (C) 2026 SharpEmu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+using System.Text.Json;
+using SharpEmu.Core;
+
+namespace SharpEmu.Core.Loader;
+
+public sealed record ParamLoader(
+    string? TitleId,
+    string? ContentId,
+    string? ContentVersion,
+    string? MasterVersion,
+    string? TargetContentVersion,
+    LocalizedParameters? LocalizedParameters,
+    Disc? Disc
+);
+
+public sealed record LocalizedParameters(
+    string? DefaultLanguage,
+    Dictionary<string, LocalizedLanguage>? Languages
+);
+
+public sealed record LocalizedLanguage(string? TitleName);
+
+public sealed record Disc(LocalizedParameters? LocalizedParameters);
+
+public static class Ps5ParamJsonReader
+{
+    public static (string? Title, string? TitleId, string? Version) TryReadPs5Param(IFileSystem fs, string paramJsonPath)
+    {
+        if (!fs.Exists(paramJsonPath))
+            return (null, null, null);
+
+        if (!fs.TryReadAllBytes(paramJsonPath, out var data))
+            return (null, null, null);
+
+        return TryReadPs5Param(data);
+    }
+
+    public static (string? Title, string? TitleId, string? Version) TryReadPs5Param(byte[] data)
+    {
+        if (data == null || data.Length == 0)
+            return (null, null, null);
+
+        try
+        {
+            using var doc = JsonDocument.Parse(data);
+            return TryReadPs5Param(doc.RootElement);
+        }
+        catch (JsonException)
+        {
+            return (null, null, null);
+        }
+    }
+
+    private static (string? Title, string? TitleId, string? Version) TryReadPs5Param(JsonElement root)
+    {
+        string? titleId = root.TryGetProperty("titleId", out var eTid) ? eTid.GetString() : null;
+
+        string? ver =
+            (root.TryGetProperty("contentVersion", out var cv) ? cv.GetString() : null)
+            ?? (root.TryGetProperty("masterVersion", out var mv) ? mv.GetString() : null)
+            ?? (root.TryGetProperty("targetContentVersion", out var tv) ? tv.GetString() : null);
+
+        string? title = ExtractTitleName(root);
+
+        return (title, titleId, ver);
+    }
+
+    private static string? ExtractTitleName(JsonElement root)
+    {
+        if (!root.TryGetProperty("localizedParameters", out var lp))
+        {
+            if (root.TryGetProperty("disc", out var disc) && disc.ValueKind == JsonValueKind.Object)
+            {
+                disc.TryGetProperty("localizedParameters", out lp);
+            }
+        }
+
+        if (lp.ValueKind != JsonValueKind.Object)
+            return null;
+
+        string? defLang = lp.TryGetProperty("defaultLanguage", out var dl) ? dl.GetString() : null;
+
+        if (!string.IsNullOrEmpty(defLang))
+        {
+            if (lp.TryGetProperty(defLang, out var langObj) && langObj.ValueKind == JsonValueKind.Object)
+            {
+                if (langObj.TryGetProperty("titleName", out var tn))
+                    return tn.GetString();
+            }
+        }
+
+        if (lp.TryGetProperty("en-US", out var en) && en.ValueKind == JsonValueKind.Object)
+        {
+            if (en.TryGetProperty("titleName", out var tn2))
+                return tn2.GetString();
+        }
+
+        return null;
+    }
+}