Enabling Auto Re-Approvals on Proposal and Proposal Line Items

/**
*Apttus Approvals Management
*CustomProposalLineItemTrigger         
*@2017 Apttus Inc. All rights reserved.
*/


trigger CustomProposalLineItemTrigger on Apttus_Proposal__Proposal_Line_Item__c (before delete, after insert)
{
    if (Trigger.isBefore && Trigger.isDelete)
	{
       // save map of old line items to attributes before they are deleted
		CustomProposalLineItemSupport.doBeforeDelete(Trigger.old, Trigger.oldMap);
	}
	if (Trigger.isAfter && Trigger.isInsert)
	{
        // update reapproval data with new line items after they are inserted
		CustomProposalLineItemSupport.doAfterInsert(Trigger.new, Trigger.newMap);
    }
}
/**
*Apttus Approvals Management
*CustomProposalLineItemSupport
* @2017 Apttus Inc. All rights reserved.
*/

public with sharing class CustomProposalLineItemSupport extends CustomApprovalsConstants
{
	// line item types
    private static final String LINETYPE_PRODUCT = 'Product/Service';
    private static final String LINETYPE_OPTION = 'Option';

    // proposal
	private static final String PROPOSAL_SOBJECT_TYPE = 'Apttus_Proposal__Proposal__c';
    private static ID quoteId = null;

    // associated process instance
	private static Apttus_Approval__ApprovalProcessInstance__c quoteProcessInstance = null;   

    // map of old line item ids to attribute key
    private static Map<ID,String> oldLineId2KeyMap = new Map<ID,String>();

    // map of new line item attribute key to id
    private static Map<String,ID> newLineKey2IdMap = new Map<String,ID>();

    // map of old line item ids to new line item ids
    private static Map<ID,ID> lineOldId2NewIdMap = new Map<ID,ID>();

    /**
     * Process old ProposalLineItems before they are deleted when a cart is finalized
     *	@param oldLineItems - a list of the old versions of the sObject records
     *  @param oldLineItemsMap - a map of IDs to the old versions of the sObject records
     */

    public static void doBeforeDelete( List<Apttus_Proposal__Proposal_Line_Item__c> oldLineItems, Map<ID, Apttus_Proposal__Proposal_Line_Item__c> oldLineItemsMap)
{      
	// iterate over line items about to deleted
	for (Integer i=0; i<oldLineItems.size(); i++)
	{
		Apttus_Proposal__Proposal_Line_Item__c oldLineItem = oldLineItems[i];
	// get quote from line item
        quoteId = oldLineItem.Apttus_Proposal__Proposal__c;
    // get line item attributes
		String lineNumber = String.valueOf(oldLineItem.Apttus_QPConfig__PrimaryLineNumber__c);
		String lineType = oldLineItem.Apttus_QPConfig__LineType__c;       
		String productId = null;
		
		if (lineType == LINETYPE_PRODUCT)
		{ 
			productId = oldLineItem.Apttus_Proposal__Product__c;         
		}
		else if (lineType == LINETYPE_OPTION)
		{        
			productId = oldLineItem.Apttus_QPConfig__OptionId__c;
      
        //productId = oldLineItem.Apttus_QPConfig__ProductOptionId__c;
		} 
		
		String chargeType = oldLineItem.Apttus_QPConfig__ChargeType__c;
		// create attribute key
			String oldLineKey = lineNumber + ':' + productId + ':' + chargeType;
		// save in map  
			oldLineId2KeyMap.put(oldLineItem.Id, oldLineKey);
    }
} 
/**
* Process new ProposalLineItems after they are inserted when a cart is finalized
* @param newLineItems - a list of the new versions of the sObject records
* @param newLineItemsMap - a map of IDs to the new versions of the sObject records
*/
	public static void doAfterInsert(List<Apttus_Proposal__Proposal_Line_Item__c> newLineItems, Map<ID, Apttus_Proposal__Proposal_Line_Item__c> newLineItemsMap)
	{      
		// iterate over line items about to deleted
        for (Integer i=0; i<newLineItems.size(); i++)
		{        
			Apttus_Proposal__Proposal_Line_Item__c newLineItem = newLineItems[i];
			
		// get quote from line item
			quoteId = newLineItem.Apttus_Proposal__Proposal__c;
			
		// get line item attributes
			String lineNumber = String.valueOf(newLineItem.Apttus_QPConfig__PrimaryLineNumber__c);
			String lineType = newLineItem.Apttus_QPConfig__LineType__c;
			String productId = null;
			
			if (lineType == LINETYPE_PRODUCT)
			{
				productId = newLineItem.Apttus_Proposal__Product__c;
			}
			else if(lineType == LINETYPE_OPTION)
			{
				productId = newLineItem.Apttus_QPConfig__OptionId__c;       
				//productId = newLineItem.Apttus_QPConfig__ProductOptionId__c;
			}
			String chargeType = newLineItem.Apttus_QPConfig__ChargeType__c;

			// create attribute key
				String newLineKey = lineNumber + ':' + productId + ':' + chargeType; 
			// save in map  
				newLineKey2IdMap.put(newLineKey, newLineItem.Id);

        }
		// create map of old line item ids to new line item ids
			Set<ID> oldLineItemIds = oldLineId2KeyMap.keySet();
			List<ID> newLineItemIds = new List<ID>();

			for (String oldLineItemId : oldLineItemIds)
			{      
				// get attribute key
				String attrKey = oldLineId2KeyMap.get(oldLineItemId);
				// lookup key in new line items map
				String newLineItemId = null;
				if(newLineKey2IdMap.containsKey(attrKey))
				{
					newLineItemId = newLineKey2IdMap.get(attrKey);
					newLineItemIds.add(newLineItemId);
					// associate old key with new one
					lineOldId2NewIdMap.put(oldLineItemId, newLineItemId);
				}		

			}

      // update reapprovals data by calling API in approvals package
     
		List<ID> oldContextObjIds = new List<ID>(oldLineItemIds);
		List<ID> newContextObjIds = newLineItemIds;
		
        system.debug(LoggingLevel.INFO,'sObjectType='+PROPOSAL_SOBJECT_TYPE);

        system.debug(LoggingLevel.INFO,'contextObjId='+quoteId);

        system.debug(LoggingLevel.INFO,'oldContextObjIds='+oldContextObjIds);

        system.debug(LoggingLevel.INFO,'newContextObjIds='+newContextObjIds);

        if (!oldContextObjIds.isEmpty() && !newContextObjIds.isEmpty() && oldContextObjIds.size() == newContextObjIds.size())
		{
            // get process instance associated with the old quote
			Apttus_Approval__ApprovalProcessInstance__c instanceSO = getProcessInstance(quoteId);
			system.debug(LoggingLevel.INFO,'instanceSO='+instanceSO);
			
            // call API to update reapproval data
            Boolean ok = Apttus_Approval.ApprovalsWebService.updateApprovalData(instanceSO.Id, PROPOSAL_SOBJECT_TYPE, quoteId, oldContextObjIds, newContextObjIds);
			
            system.debug(LoggingLevel.INFO,'Apttus_Approval.ApprovalsWebService.updateApprovalData='+ok);

        }
    }

/**
* Get process instance for the given proposal id
* @param proposalId
* @return process instance object
*/

	private static Apttus_Approval__ApprovalProcessInstance__c getProcessInstance(ID proposalId)
	{
		List<Apttus_Approval__ApprovalProcessInstance__c> instanceList = [select Id, Name, LastModifiedDate, LastModifiedById, LastActivityDate, CreatedDate, CreatedById, Apttus_Approval__Status__c, Apttus_Approval__StartTime__c, Apttus_Approval__ReassignmentEmailTemplate__c, Apttus_Approval__PrevProcessInstanceId__c, Apttus_Approval__NotifyOnlyEmailTemplate__c, Apttus_Approval__InstanceNumber__c, Apttus_Approval__EscalationEmailTemplate__c, Apttus_Approval__EndTime__c, Apttus_Approval__Data__c, Apttus_Approval__ConsolidationVersionNumber__c, Apttus_Approval__CancellationEmailTemplate__c, Apttus_Approval__BusinessObjectType__c, Apttus_Approval__BusinessObjectLink__c, Apttus_Approval__BusinessObjectId__c, Apttus_Approval__AssignmentEmailTemplate__c, Apttus_Approval__ApprovalProcessId__c From Apttus_Approval__ApprovalProcessInstance__c where Apttus_Approval__BusinessObjectId__c = :proposalId order by CreatedDate DESC limit 1]; 
		if ( ! nullOrEmpty(instanceList))
		{
			return instanceList[0];
        }
		
		return null;
    }
/**
* Checks if the given string value is null or empty.
* @param strValue the string to check
* @return <code>true</code> if the string value is null or empty, <code>false</code> otherwise
*/
	public static Boolean nullOrEmpty(String strValue)
	{ 
		// check if null or zero length string
		return (strValue == null || strValue.trim().length() == 0);
    }

/**
* Checks if the given list of objects is null or empty.
* @param objList the list of objects to check
* @return <code>true</code> if the list is null or empty, <code>false</code> otherwise
*/
	public static Boolean nullOrEmpty(List<Object> objList)
	{
		// check if null or empty
		return (objList == null || objList.isEmpty());
	}
}