org.eclipse.osbp.xtext.action/src/org/eclipse/osbp/xtext/action/common/TaskHelper.java

/**
 *                                                                            
 *  Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany) 
 *                                                                            
 *  All rights reserved. This program and the accompanying materials           
 *  are made available under the terms of the Eclipse Public License v1.0       
 *  which accompanies this distribution, and is available at                  
 *  http://www.eclipse.org/legal/epl-v10.html                                 
 *                                                                            
 *  Contributors:                                                      
 * 	   Christophe Loetz (Loetz GmbH&Co.KG) - initial implementation
 * 
 */
package org.eclipse.osbp.xtext.action.common;

import java.util.HashMap;

import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.osbp.bpm.api.BPMStatus;
import org.eclipse.osbp.bpm.api.BPMTaskSummary;
import org.eclipse.osbp.ui.api.user.IUser;

public class TaskHelper {

	private TaskHelper() {
	}

	private static final String ADMINISTRATOR = "Administrator";

	public static final class Context extends HashMap<String, Object> {
		private static final long serialVersionUID = -2810090198332954979L;

		public static final String USER = "user";
		public static final String TABLEVIEW = "table";
		public static final String TASKSUMMARY = "taskSummary";
	}

	public static long getTaskId(IEclipseContext context) {
		BPMTaskSummary task = context.get(BPMTaskSummary.class);
		if(task != null) {
			return task.getId();
		}
		return 0;
	}

	public static boolean isTask(IEclipseContext context, BPMStatus status) {
		BPMTaskSummary task = context.get(BPMTaskSummary.class); 
		return (task != null && task.getStatus() != null && task.getStatus().equals(status));
	}

	public static BPMStatus getStatusType(int code) {
		for (BPMStatus type : BPMStatus.values()) {
			if (type.ordinal() == code) {
				return type;
			}
		}
		return null;
	}
	
	private static String getUserName(IEclipseContext context) {
		IUser user = context.get(IUser.class);
		if(user != null) {
			return user.getUserName();
		}
		return ADMINISTRATOR;
	}

	public static final boolean claimCanExecute(final IEclipseContext context) {
		if (ADMINISTRATOR.equals(getUserName(context))) {
			return false;
		}
		return TaskHelper.isTask(context, BPMStatus.Created);
	}

	public static final boolean startCanExecute(final IEclipseContext context) {
		if (ADMINISTRATOR.equals(getUserName(context))) {
			return false;
		}
		return TaskHelper.isTask(context, BPMStatus.Ready);
	}

	public static final boolean resumeCanExecute(final IEclipseContext context) {
		if (ADMINISTRATOR.equals(getUserName(context))) {
			return false;
		}
		boolean suspended = TaskHelper.isTask(context, BPMStatus.Suspended);
		boolean progress = TaskHelper.isTask(context, BPMStatus.InProgress);
		return (suspended || progress);
	}

	public static final boolean stopCanExecute(final IEclipseContext context) {
		if (ADMINISTRATOR.equals(getUserName(context))) {
			return false;
		}
		return TaskHelper.isTask(context, BPMStatus.InProgress);
	}

	public static final boolean skipCanExecute(final IEclipseContext context) {
		if (ADMINISTRATOR.equals(getUserName(context))) {
			return false;
		}
		return TaskHelper.isTask(context, BPMStatus.InProgress);
	}

	public static final boolean delegateCanExecute(final IEclipseContext context) {
		if (ADMINISTRATOR.equals(getUserName(context))) {
			return false;
		}
		return TaskHelper.isTask(context, BPMStatus.InProgress);
	}

	public static final boolean forwardCanExecute(final IEclipseContext context) {
		if (ADMINISTRATOR.equals(getUserName(context))) {
			return false;
		}
		return TaskHelper.isTask(context, BPMStatus.InProgress);
	}

	public static final boolean registerCanExecute(final IEclipseContext context) {
		return TaskHelper.isTask(context, BPMStatus.Ready);
	}

	public static final boolean removeCanExecute(final IEclipseContext context) {
		return TaskHelper.isTask(context, BPMStatus.Ready);
	}

	public static final boolean completeCanExecute(final IEclipseContext context) {
		if (ADMINISTRATOR.equals(getUserName(context))) {
			return false;
		}
		return TaskHelper.isTask(context, BPMStatus.InProgress);
	}

	public static final boolean suspendCanExecute(final IEclipseContext context) {
		if (ADMINISTRATOR.equals(getUserName(context))) {
			return false;
		}
		return TaskHelper.isTask(context, BPMStatus.InProgress);
	}

	public static final boolean releaseCanExecute(final IEclipseContext context) {
		return TaskHelper.isTask(context, BPMStatus.InProgress);
	}

	public static final boolean activateCanExecute(final IEclipseContext context) {
		return TaskHelper.isTask(context, BPMStatus.Created);
	}

	public static final boolean failCanExecute(final IEclipseContext context) {
		return TaskHelper.isTask(context, BPMStatus.InProgress);
	}

	public static final boolean exitCanExecute(final IEclipseContext context) {
		return TaskHelper.isTask(context, BPMStatus.InProgress);
	}
}