Support displaying Rift mod information

HMCLCore/src/main/java/org/jackhuang/hmcl/mod/ModInfo.java

@@ -152,14 +152,20 @@ public final class ModInfo implements Comparable<ModInfo> {
                 try {
                     return ForgeModMetadata.fromFile(modFile);
                 } catch (Exception ignore) {
-                    description = "May be Forge mod";
                 }
+
+                try {
+                    return RiftModMetadata.fromFile(modFile);
+                } catch (Exception ignore) {
+                }
+
+                description = "";
                 break;
             case "litemod":
                 try {
                     return LiteModMetadata.fromFile(modFile);
                 } catch (Exception ignore) {
-                    description = "May be LiteLoader mod";
+                    description = "LiteLoader Mod";
                 }
                 break;
             default:

HMCLCore/src/main/java/org/jackhuang/hmcl/mod/RiftModMetadata.java

@@ -0,0 +1,70 @@
+/*
+ * Hello Minecraft! Launcher.
+ * Copyright (C) 2018  huangyuhui <huanghongxun2008@126.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see {http://www.gnu.org/licenses/}.
+ */
+package org.jackhuang.hmcl.mod;
+
+import com.google.gson.JsonParseException;
+import org.jackhuang.hmcl.util.*;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.FileSystem;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Collections;
+import java.util.List;
+
+@Immutable
+public final class RiftModMetadata {
+    private final String id;
+    private final String name;
+    private final List<String> authors;
+
+    public RiftModMetadata() {
+        this("", "", Collections.emptyList());
+    }
+
+    public RiftModMetadata(String id, String name, List<String> authors) {
+        this.id = id;
+        this.name = name;
+        this.authors = authors;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public List<String> getAuthors() {
+        return authors;
+    }
+
+    public static ModInfo fromFile(File modFile) throws IOException, JsonParseException {
+        try (FileSystem fs = CompressingUtils.createReadOnlyZipFileSystem(modFile.toPath())) {
+            Path mcmod = fs.getPath("riftmod.json");
+            if (Files.notExists(mcmod))
+                throw new IOException("File " + modFile + " is not a Forge mod.");
+            RiftModMetadata metadata = JsonUtils.fromNonNullJson(IOUtils.readFullyAsString(Files.newInputStream(mcmod)), RiftModMetadata.class);
+            String authors = metadata.getAuthors() == null ? "" : String.join(", ", metadata.getAuthors());
+            return new ModInfo(modFile, metadata.getName(), "",
+                    authors, "", "", "");
+        }
+    }
+}