fix: 无法识别部分旧版本 Forge 模组

Author: ShirosakiMio

FCLCore/src/main/java/com/tungsten/fclcore/mod/modinfo/ForgeOldModMetadata.java

@@ -20,6 +20,8 @@
 import com.google.gson.JsonParseException;
 import com.google.gson.annotations.SerializedName;
 import com.google.gson.reflect.TypeToken;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonToken;
 import com.tungsten.fclcore.mod.LocalModFile;
 import com.tungsten.fclcore.mod.ModLoaderType;
 import com.tungsten.fclcore.mod.ModManager;
@@ -119,11 +121,26 @@ public static LocalModFile fromFile(ModManager modManager, Path modFile, FileSys
         Path mcmod = fs.getPath("mcmod.info");
         if (Files.notExists(mcmod))
             throw new IOException("File " + modFile + " is not a Forge mod.");
-        List<ForgeOldModMetadata> modList = JsonUtils.GSON.fromJson(FileUtils.readText(mcmod),
-                new TypeToken<List<ForgeOldModMetadata>>() {
+        List<ForgeOldModMetadata> modList;
+
+        try (var reader = Files.newBufferedReader(mcmod);
+             var jsonReader = new JsonReader(reader)) {
+            JsonToken firstToken = jsonReader.peek();
+
+            if (firstToken == JsonToken.BEGIN_ARRAY)
+                modList = JsonUtils.GSON.fromJson(jsonReader, new TypeToken<List<ForgeOldModMetadata>>() {
                 }.getType());
+            else if (firstToken == JsonToken.BEGIN_OBJECT) {
+                ForgeOldModMetadataLst list = JsonUtils.GSON.fromJson(jsonReader, ForgeOldModMetadataLst.class);
+                if (list == null)
+                    throw new IOException("Mod " + modFile + " `mcmod.info` is malformed");
+                modList = list.getModList();
+            } else {
+                throw new JsonParseException("Unexpected first token: " + firstToken);
+            }
+        }
         if (modList == null || modList.isEmpty())
-            throw new IOException("Mod " + modFile + " `mcmod.info` is malformed..");
+            throw new IOException("Mod " + modFile + " `mcmod.info` is malformed");
         ForgeOldModMetadata metadata = modList.get(0);
         String authors = metadata.getAuthor();
         if (StringUtils.isBlank(authors) && metadata.getAuthors().length > 0)

FCLCore/src/main/java/com/tungsten/fclcore/mod/modinfo/ForgeOldModMetadataLst.java

@@ -0,0 +1,25 @@
+package com.tungsten.fclcore.mod.modinfo;
+
+import java.util.List;
+
+/// @author Glavo
+public class ForgeOldModMetadataLst {
+    private int modListVersion;
+    private List<ForgeOldModMetadata> modList;
+
+    public int getModListVersion() {
+        return modListVersion;
+    }
+
+    public void setModListVersion(int modListVersion) {
+        this.modListVersion = modListVersion;
+    }
+
+    public List<ForgeOldModMetadata> getModList() {
+        return modList;
+    }
+
+    public void setModList(List<ForgeOldModMetadata> modList) {
+        this.modList = modList;
+    }
+}