r/org.eclipse.statet.r.apps/src/org/eclipse/statet/internal/r/apps/ui/launching/AppRCommandHandler.java

/*=============================================================================#
 # Copyright (c) 2017, 2019 Stephan Wahlbrink and others.
 # 
 # This program and the accompanying materials are made available under the
 # terms of the Eclipse Public License 2.0 which is available at
 # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.internal.r.apps.ui.launching;

import java.util.Map;

import org.eclipse.statet.jcommons.lang.NonNullByDefault;
import org.eclipse.statet.jcommons.lang.Nullable;
import org.eclipse.statet.jcommons.status.ProgressMonitor;
import org.eclipse.statet.jcommons.status.Status;
import org.eclipse.statet.jcommons.status.StatusException;
import org.eclipse.statet.jcommons.status.Statuses;
import org.eclipse.statet.jcommons.ts.core.util.ToolCommandHandlerUtils;

import org.eclipse.statet.nico.core.runtime.ToolController;
import org.eclipse.statet.r.console.core.RProcess;
import org.eclipse.statet.rj.ts.core.AbstractRToolCommandHandler;
import org.eclipse.statet.rj.ts.core.RToolService;


@NonNullByDefault
class AppRCommandHandler extends AbstractRToolCommandHandler {
	
	
	private static final String ON_APP_STARTED_ID= "org.eclipse.statet.r.apps.onAppStarted"; //$NON-NLS-1$
	
	private static final String ON_APP_STOPPED_ID= "org.eclipse.statet.r.apps.onAppStopped"; //$NON-NLS-1$
	
	
	static AppRCommandHandler connect(final AppRunner runner,
			final RToolService r, final ProgressMonitor m) throws StatusException {
		final ToolController controller= ((RProcess) r.getTool()).getController();
		AppRCommandHandler handler= (AppRCommandHandler) controller.getCommandHandler(ON_APP_STARTED_ID);
		if (handler == null) {
			handler= new AppRCommandHandler();
			controller.addCommandHandler(ON_APP_STARTED_ID, handler);
			controller.addCommandHandler(ON_APP_STOPPED_ID, handler);
		}
		handler.currentRunner= runner;
		
		return handler;
	}
	
	
	private @Nullable AppRunner currentRunner;
	
	
	private AppRCommandHandler() {
	}
	
	
	@Override
	protected Status execute(final String id, final RToolService r,
			final Map<String, Object> data,
			final ProgressMonitor m) throws StatusException {
		if (id.equals(ON_APP_STARTED_ID)) {
			if (this.currentRunner != null) {
				this.currentRunner.onAppStarted(
						ToolCommandHandlerUtils.getCheckedData(data, "url", String.class, false), //$NON-NLS-1$
						ToolCommandHandlerUtils.getCheckedData(data, "typeId", String.class, false) ); //$NON-NLS-1$
			}
		}
		if (id.equals(ON_APP_STOPPED_ID)) {
			if (this.currentRunner != null) {
				this.currentRunner.onAppStopped(
						ToolCommandHandlerUtils.getCheckedData(data, "url", String.class, false) ); //$NON-NLS-1$
			}
		}
		return Statuses.OK_STATUS;
	}
	
	void disconnect(final AppRunner runner) {
		if (this.currentRunner == runner) {
			this.currentRunner= null;
		}
	}
	
}