默认不进行降级更新 (#2862)

* 默认不进行降级更新

* update

HMCL/src/main/java/org/jackhuang/hmcl/upgrade/RemoteVersion.java

@@ -38,10 +38,11 @@ public class RemoteVersion {
             String jarHash = Optional.ofNullable(response.get("jarsha1")).map(JsonElement::getAsString).orElse(null);
             String packXZUrl = Optional.ofNullable(response.get("packxz")).map(JsonElement::getAsString).orElse(null);
             String packXZHash = Optional.ofNullable(response.get("packxzsha1")).map(JsonElement::getAsString).orElse(null);
+            boolean force = Optional.ofNullable(response.get("force")).map(JsonElement::getAsBoolean).orElse(false);
             if (Pack200Utils.isSupported() && packXZUrl != null && packXZHash != null) {
-                return new RemoteVersion(channel, version, packXZUrl, Type.PACK_XZ, new IntegrityCheck("SHA-1", packXZHash));
+                return new RemoteVersion(channel, version, packXZUrl, Type.PACK_XZ, new IntegrityCheck("SHA-1", packXZHash), force);
             } else if (jarUrl != null && jarHash != null) {
-                return new RemoteVersion(channel, version, jarUrl, Type.JAR, new IntegrityCheck("SHA-1", jarHash));
+                return new RemoteVersion(channel, version, jarUrl, Type.JAR, new IntegrityCheck("SHA-1", jarHash), force);
             } else {
                 throw new IOException("No download url is available");
             }
@@ -55,13 +56,15 @@ public class RemoteVersion {
     private final String url;
     private final Type type;
     private final IntegrityCheck integrityCheck;
+    private final boolean force;
 
-    public RemoteVersion(UpdateChannel channel, String version, String url, Type type, IntegrityCheck integrityCheck) {
+    public RemoteVersion(UpdateChannel channel, String version, String url, Type type, IntegrityCheck integrityCheck, boolean force) {
         this.channel = channel;
         this.version = version;
         this.url = url;
         this.type = type;
         this.integrityCheck = integrityCheck;
+        this.force = force;
     }
 
     public UpdateChannel getChannel() {
@@ -84,6 +87,10 @@ public class RemoteVersion {
         return integrityCheck;
     }
 
+    public boolean isForce() {
+        return force;
+    }
+
     @Override
     public String toString() {
         return "[" + version + " from " + url + "]";

HMCL/src/main/java/org/jackhuang/hmcl/upgrade/UpdateChecker.java

@@ -24,6 +24,7 @@ import javafx.beans.property.*;
 import javafx.beans.value.ObservableBooleanValue;
 import org.jackhuang.hmcl.Metadata;
 import org.jackhuang.hmcl.util.io.NetworkUtils;
+import org.jackhuang.hmcl.util.versioning.VersionNumber;
 
 import java.io.IOException;
 import java.util.logging.Level;
@@ -42,10 +43,13 @@ public final class UpdateChecker {
                 RemoteVersion latest = latestVersion.get();
                 if (latest == null || isDevelopmentVersion(Metadata.VERSION)) {
                     return false;
-                } else {
+                } else if (latest.isForce()
-                    // We can update from development version to stable version,
+                        || Metadata.isNightly()
-                    // which can be downgrading.
+                        || latest.getChannel() == UpdateChannel.NIGHTLY
+                        || latest.getChannel() != UpdateChannel.getChannel()) {
                     return !latest.getVersion().equals(Metadata.VERSION);
+                } else {
+                    return VersionNumber.compare(Metadata.VERSION, latest.getVersion()) < 0;
                 }
             },
             latestVersion);