gcat/src/main/java/org/gcube/gcat/moderation/thread/social/notifications/SocialNotificationModerationThread.java

package org.gcube.gcat.moderation.thread.social.notifications;

import java.io.StringWriter;
import java.net.URL;
import java.util.Set;

import org.gcube.common.authorization.utils.manager.SecretManager;
import org.gcube.common.authorization.utils.manager.SecretManagerProvider;
import org.gcube.common.authorization.utils.secret.Secret;
import org.gcube.gcat.api.moderation.CMItemStatus;
import org.gcube.gcat.api.moderation.Moderated;
import org.gcube.gcat.moderation.thread.ModerationThread;
import org.gcube.gcat.persistence.ckan.CKANUser;
import org.gcube.gcat.social.SocialUsers;
import org.gcube.gcat.utils.Constants;
import org.gcube.social_networking.social_networking_client_library.NotificationClient;
import org.gcube.social_networking.socialnetworking.model.beans.catalogue.CatalogueEvent;
import org.gcube.social_networking.socialnetworking.model.beans.catalogue.CatalogueEventType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Luca Frosini (ISTI - CNR)
 */
public class SocialNotificationModerationThread extends ModerationThread {

	private static final Logger logger = LoggerFactory.getLogger(SocialNotificationModerationThread.class);
	
	protected CatalogueEventType catalogueEventType;
	
	protected StringBuffer getMainItemInfo(StringBuffer stringBuffer) {
		stringBuffer.append("Status: ");
		stringBuffer.append(cmItemStatus.getFancyValue());
		stringBuffer.append("\n");
		stringBuffer.append("Title: ");
		stringBuffer.append(itemTitle);
		stringBuffer.append("\n");
		stringBuffer.append("Name: ");
		stringBuffer.append(itemName);
		stringBuffer.append("\n");
		stringBuffer.append("ID: ");
		stringBuffer.append(itemID);
		stringBuffer.append("\n");
		stringBuffer.append("URL: ");
		if(cmItemStatus == CMItemStatus.APPROVED) {
			stringBuffer.append(itemURL);
		}else {
			stringBuffer.append(getModerationURL());
		}
		stringBuffer.append("\n\n");
		return stringBuffer;
	}
	
	/**
	 * Create the message for an item that is created/updated
	 */
	protected void notifyItemToBeManaged() throws Exception {
		/* 
		 * An example of created message is:
		 * 
		 * [mister x] created /updated the item "[TITLE]". You are kindly requested to review it and decide either to APPROVE or REJECT it. [Go to catalogue]
		 * 
		 */
		String fullName = ckanUser.getNameSurname();
		StringBuffer stringBuffer = new StringBuffer();
		stringBuffer.append(fullName);
		stringBuffer.append(create ? " created " : " updated ");
		stringBuffer.append("the item ");
		stringBuffer.append(itemTitle);
		stringBuffer.append("You are kindly requested to review it and decide either to APPROVE or REJECT it. ");
		postMessage(stringBuffer.toString());
	}
	
	
	public void postItemCreated() throws Exception {
		create = true;
		cmItemStatus = CMItemStatus.PENDING;
		catalogueEventType = CatalogueEventType.ITEM_SUBMITTED;
		notifyItemToBeManaged();
	}

	public void postItemUpdated() throws Exception {
		create = false;
		cmItemStatus = CMItemStatus.PENDING;
		catalogueEventType = CatalogueEventType.ITEM_UPDATED;
		notifyItemToBeManaged();
	}
	
	protected StringBuffer addUserWithRole(String fullName, String role, StringBuffer stringBuffer) {
		stringBuffer.append(fullName);
		stringBuffer.append(" [");
		stringBuffer.append(role);
		stringBuffer.append("] ");
		return stringBuffer;
	}
	
	public void postItemManaged(String userMessage) throws Exception {
		/*
		 * [mister x] rejected the item "[TITLE]" with this accompanying message "[MESSAGE]". To resubmit it [Go to catalogue]
		 * 
		 * [mister x] approved the item "[TITLE]" with this accompanying message "[MESSAGE]". [Go to catalogue]
		 */
		create = false;
		String fullName = ckanUser.getNameSurname();
		StringBuffer stringBuffer = new StringBuffer();
		stringBuffer = addUserWithRole(fullName, Moderated.CATALOGUE_MODERATOR, stringBuffer);
		stringBuffer.append(cmItemStatus.getValue());
		stringBuffer.append(" the item '");
		stringBuffer.append(itemTitle);
		stringBuffer.append("'");
		if(userMessage!=null && userMessage.length()>0) {
			stringBuffer.append(" with this accompanying message '");
			stringBuffer.append(userMessage);
			stringBuffer.append("'");
		}
		stringBuffer.append(".");
		
		if(cmItemStatus == CMItemStatus.REJECTED) {
			stringBuffer.append(" To resubmit it ");
		}
		postMessage(stringBuffer.toString());
	}

	@Override
	public void postItemRejected(String userMessage) throws Exception {
		create = false;
		cmItemStatus = CMItemStatus.REJECTED;
		catalogueEventType = CatalogueEventType.ITEM_REJECTED;
		postItemManaged(userMessage);
	}
	
	@Override
	public void postItemApproved(String userMessage) throws Exception {
		create = false;
		cmItemStatus = CMItemStatus.APPROVED;
		catalogueEventType = CatalogueEventType.ITEM_PUBLISHED;
		postItemManaged(userMessage);
	}
	
	protected String getSubject() {
		StringWriter stringWriter = new StringWriter();
		if(catalogueEventType!=null) {
			switch (catalogueEventType) {
				case ITEM_SUBMITTED:
					stringWriter.append("Submitted item '");
					break;
		
				case ITEM_UPDATED:
					stringWriter.append("Updated item '");
					break;
				
				case ITEM_REJECTED:
				case ITEM_PUBLISHED:
					stringWriter.append(cmItemStatus.getFancyValue());
					stringWriter.append(" item '");
					break;
					
				default:
					break;
			}
		}else {
			stringWriter.append("Message for item '");
		}
		stringWriter.append(itemTitle);
		stringWriter.append("'");
		return stringWriter.toString(); 
	}
	
	protected CatalogueEvent getCatalogueEvent(String messageString) throws Exception {
		CatalogueEvent catalogueEvent = new CatalogueEvent();
		catalogueEvent.setItemId(getSubject());
		if(cmItemStatus == CMItemStatus.APPROVED) {
			catalogueEvent.setItemURL(new URL(itemURL));
		}else {
			catalogueEvent.setItemURL(new URL(getModerationURL()));
		}
		
		catalogueEvent.setNotifyText(messageString);
		
		Set<String> users = SocialUsers.getUsernamesByRole(Moderated.CATALOGUE_MODERATOR);
		
		SecretManager secretManager = SecretManagerProvider.instance.get();
		String username = secretManager.getUser().getUsername();
		
		// Adding the user is generating the event
		users.add(username);
		
		// Adding item creator
		users.add(CKANUser.getUsernameFromCKANUsername(ckanUser.getName()));
		
		catalogueEvent.setIdsToNotify(users.toArray(new String[users.size()]));
		catalogueEvent.setIdsAsGroup(false);
		
		return catalogueEvent;
	}
	
	@Override
	protected void postMessage(String messageString) throws Exception {
		CatalogueEvent catalogueEvent = getCatalogueEvent(messageString);
		SecretManager secretManager = SecretManagerProvider.instance.get();
		Secret secret = Constants.getCatalogueSecret();
		secretManager.startSession(secret);
		try {
			sendNotification(catalogueEvent);
		}finally {
			secretManager.endSession();
		}
	}

	@Override
	public void postUserMessage(CMItemStatus cmItemStatus, String userMessage) throws Exception {
		this.create = false;
		this.cmItemStatus = cmItemStatus;
		
		switch (cmItemStatus) {
			case PENDING:
				catalogueEventType = CatalogueEventType.ITEM_UPDATED;
				break;
				
			case APPROVED:
				catalogueEventType = CatalogueEventType.ITEM_PUBLISHED;
				break;
				
			case REJECTED:
				catalogueEventType = CatalogueEventType.ITEM_REJECTED;
				break;
			
			default:
				break;
		}
		
		String fullName = ckanUser.getNameSurname();
		StringBuffer stringBuffer = new StringBuffer();
		stringBuffer = addUserWithRole(fullName, itemAuthor ? "Author" : Moderated.CATALOGUE_MODERATOR, stringBuffer);
		stringBuffer.append("sent a message regarding the following item\n\n");
		stringBuffer = getMainItemInfo(stringBuffer);
		stringBuffer.append(userMessage);
		CatalogueEvent catalogueEvent = getCatalogueEvent(stringBuffer.toString());
		SecretManager secretManager = SecretManagerProvider.instance.get();
		Secret secret = Constants.getCatalogueSecret();
		secretManager.startSession(secret);
		try {
			sendNotification(catalogueEvent);
		}finally {
			secretManager.endSession();
		}
	}

	protected void sendNotification(CatalogueEvent catalogueEvent) throws Exception {
		NotificationClient nc = new NotificationClient();
		nc.sendCatalogueEvent(catalogueEvent);
	}

	@Override
	protected void createModerationThread() throws Exception {
		create = true;
		cmItemStatus = CMItemStatus.PENDING;
	}
	
}