Phase5

apps/node-agent/internal/runtime/manager.go

@@ -570,6 +570,66 @@ func (m *Manager) HandleWorldReplace(ctx context.Context, correlationID string,
 	})
 }
 
+// HandleAddonInstall downloads and installs an addon JAR.
+func (m *Manager) HandleAddonInstall(ctx context.Context, correlationID string, payload protocol.ServerAddonInstallPayload) {
+	meta := payload.OperationMeta
+	rec, ok := m.getServer(meta.ServerID)
+	if !ok {
+		m.failOperation(ctx, correlationID, meta, "addon.install", "SERVER_NOT_FOUND", "server is not provisioned on this node")
+		return
+	}
+
+	if rec.State == ServerStateRunning {
+		m.failOperation(ctx, correlationID, meta, "addon.install", "SERVER_RUNNING", "server must be stopped before installing addons")
+		return
+	}
+
+	localPath, err := files.ResolvePath(rec.DataPath, payload.RelativePath)
+	if err != nil {
+		m.failOperation(ctx, correlationID, meta, "addon.install", filesErrorCode(err), err.Error())
+		return
+	}
+
+	if err := transfer.DownloadFile(payload.DownloadURL, localPath); err != nil {
+		m.failOperation(ctx, correlationID, meta, "addon.install", "DOWNLOAD_FAILED", err.Error())
+		return
+	}
+
+	if err := transfer.VerifySha512File(localPath, payload.Sha512); err != nil {
+		_ = os.Remove(localPath)
+		m.failOperation(ctx, correlationID, meta, "addon.install", "HASH_MISMATCH", err.Error())
+		return
+	}
+
+	m.completeOperation(ctx, correlationID, meta, "addon.install", map[string]string{
+		"path": payload.RelativePath,
+	})
+}
+
+// HandleAddonRemove deletes an installed addon file.
+func (m *Manager) HandleAddonRemove(ctx context.Context, correlationID string, payload protocol.ServerAddonRemovePayload) {
+	meta := payload.OperationMeta
+	rec, ok := m.getServer(meta.ServerID)
+	if !ok {
+		m.failOperation(ctx, correlationID, meta, "addon.remove", "SERVER_NOT_FOUND", "server is not provisioned on this node")
+		return
+	}
+
+	if rec.State == ServerStateRunning {
+		m.failOperation(ctx, correlationID, meta, "addon.remove", "SERVER_RUNNING", "server must be stopped before removing addons")
+		return
+	}
+
+	if err := files.DeleteFile(rec.DataPath, payload.RelativePath); err != nil {
+		m.failOperation(ctx, correlationID, meta, "addon.remove", filesErrorCode(err), err.Error())
+		return
+	}
+
+	m.completeOperation(ctx, correlationID, meta, "addon.remove", map[string]string{
+		"path": payload.RelativePath,
+	})
+}
+
 func (m *Manager) getServer(serverID string) (*serverRecord, bool) {
 	m.mu.RLock()
 	defer m.mu.RUnlock()