org.eclipse.osbp.xtext.authorizationdsl.ui/src/org/eclipse/osbp/xtext/authorizationdsl/ui/contentassist/AuthorizationDSLProposalProvider.xtend

/**
 *                                                                            
 *  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
 * 
 * 
 *  This copyright notice shows up in the generated Java code
 *
 */
 
package org.eclipse.osbp.xtext.authorizationdsl.ui.contentassist

import com.google.inject.Inject
import org.eclipse.emf.ecore.EObject
import org.eclipse.osbp.xtext.authorizationdsl.AuthorizationLazyResolver
import org.eclipse.osbp.xtext.authorizationdsl.RoleBlipProcess
import org.eclipse.osbp.xtext.authorizationdsl.RoleBlipUserTask
import org.eclipse.osbp.xtext.authorizationdsl.RoleEntity
import org.eclipse.osbp.xtext.authorizationdsl.RoleEntityAttribute
import org.eclipse.osbp.xtext.authorizationdsl.RoleEntityReference
import org.eclipse.osbp.xtext.authorizationdsl.common.AuthorizationDSLLiterals
import org.eclipse.osbp.xtext.basic.ui.contentassist.BasicDSLProposalProviderHelper
import org.eclipse.xtext.Keyword
import org.eclipse.xtext.RuleCall
import org.eclipse.xtext.common.ui.contentassist.TerminalsProposalProvider
import org.eclipse.xtext.ui.editor.contentassist.ContentAssistContext
import org.eclipse.xtext.ui.editor.contentassist.ICompletionProposalAcceptor

/**
 * see http://www.eclipse.org/Xtext/documentation.html#contentAssist on how to customize content assistant
 */
class AuthorizationDSLProposalProvider extends AbstractAuthorizationDSLProposalProvider {

	@Inject TerminalsProposalProvider provider
	@Inject BasicDSLProposalProviderHelper providerHelper

	/**
	  * This override will enable 1 length non letter characters as keyword.
	  */
	override protected boolean isKeywordWorthyToPropose(Keyword keyword) {
		return true
	}

	override protected isValidProposal(String proposal, String prefix, ContentAssistContext context) {
		var result = super.isValidProposal(proposal, prefix, context)
		// Entity
		if (context.getCurrentModel() instanceof RoleEntityAttribute) {
			return isEntityAttributeValidProposal(context.currentModel as RoleEntityAttribute, proposal, result);
		} else if (context.getCurrentModel() instanceof RoleEntityReference) {
			return isEntityReferenceValidProposal(context.currentModel as RoleEntityReference, proposal, result);
		} else if (context.getCurrentModel() instanceof RoleBlipUserTask) {
			return isBlipUserTaskValidProposal(context.currentModel as RoleBlipUserTask, proposal, result);
		} else {
			return result
		}
	}

	override public void complete_QualifiedName(EObject model, RuleCall ruleCall, ContentAssistContext context,
		ICompletionProposalAcceptor acceptor) {
		providerHelper.complete_PackageName(model, ruleCall, context, acceptor, this)
	}

	// Entity
	def boolean isEntityAttributeValidProposal(RoleEntityAttribute currentAttribute, String proposal, boolean result) {
		if (AuthorizationDSLLiterals.isPropertyEnum(proposal)) {
			return true;
		}
		var eObj = currentAttribute.eContainer()
		if (eObj instanceof RoleEntity) {
			for (attribute : (eObj as RoleEntity).entityRef.allAttributes) {
				if (attribute.name.equals(proposal) && !attribute.isId && !attribute.isUuid) {
					return true
				}
			}
		}
		return false
	}

	def boolean isEntityReferenceValidProposal(AuthorizationLazyResolver currentReference, String proposal, boolean result) {
		if (AuthorizationDSLLiterals.isPropertyEnum(proposal)) {
			return true;
		}
		var eObj = currentReference.eContainer()
		if (eObj instanceof RoleEntity) {
			for (reference : (eObj as RoleEntity).entityRef.allReferences) {
				if (reference.name.equals(proposal)) {
					return true
				}
			}
		}
		return false
	}
	
	def boolean isBlipUserTaskValidProposal(RoleBlipUserTask currentUserTask, String proposal, boolean result) {
		if (AuthorizationDSLLiterals.isUserTaskEnum(proposal)) {
			return true;
		}
		var eObj = currentUserTask.eContainer()
		if (eObj instanceof RoleBlipProcess) {
			for (item : (eObj as RoleBlipProcess).process.items) {
				if	(item.name.equals(proposal)) {
					return true
				}
			}
		}
		return false
	}
	
	// ------------------------ delegates to TerminalsProposalProvider -----------------
	
	override public void complete_ID(EObject model, RuleCall ruleCall, ContentAssistContext context,
		ICompletionProposalAcceptor acceptor) {
		provider.complete_ID(model, ruleCall, context, acceptor)
	}

	
}