CJA Create Order from Opportunity

/*
* Name : CJA Create Order from Opportunity
* Description : This Trigger will create order from opportunity and also add opporutnity products data into the order ITEMS field.
* Date Created : 3/4/2019
* Last Date Modified : 3/4/2019
* 
*/

trigger CJACreateOrderFromOpportunity on Opportunity (after update) {
	Map<Id, Opportunity> oppIdToObjMap = new Map<Id, Opportunity>();
    
    //Get opportunities
	for(Opportunity opp : Trigger.new)
    {
        if(opp.StageName == 'Order Approved' && Trigger.Oldmap.get(opp.id).StageName <> 'Order Approved')
            oppIdToObjMap.put(opp.id, opp);
    }
    
    system.debug('SYA ::'+oppIdToObjMap);
    
    Map<Id, List<OpportunityLineItem>> oppIdToOppLineMap = new Map<Id, List<OpportunityLineItem>>();
    
	//Get Opp with Opp products in a Map
	for(OpportunityLineItem oppLine: [select id, OpportunityId, Product2.Variant_SKU__c, Quantity, UnitPrice, Discount, CurrencyIsoCode from OpportunityLineItem where OpportunityId = : oppIdToObjMap.keyset()])
    {
        if(oppIdToOppLineMap.get(oppLine.OpportunityId) <> null)
        {
            List<OpportunityLineItem> oppLineLst = oppIdToOppLineMap.get(oppLine.OpportunityId);
            oppLineLst.add(oppLine);
            oppIdToOppLineMap.put(oppLine.OpportunityId, oppLineLst);
        }else
        {
            List<OpportunityLineItem> oppLineLst = new List<OpportunityLineItem>();
            oppLineLst.add(oppLine);
            oppIdToOppLineMap.put(oppLine.OpportunityId, oppLineLst);
        }
        
        system.debug('SYA ::'+oppIdToOppLineMap);
        
    }
    
    List<Order> ordToInsert = new List<Order>();
    
    //Parse the opp products and add it to the Orders item_name field
    for(Opportunity opp : oppIdToObjMap.values())
    {
        String itemName = '';
        
        if(oppIdToOppLineMap.get(opp.Id).size() > 0)
        {
            for(OpportunityLineItem oppLine : oppIdToOppLineMap.get(opp.Id))
            {
                if(itemName <> '')
                    itemName += ';';
                itemName += oppLine.Product2.Variant_SKU__c+'|'+oppLine.Quantity+'|'+oppLine.UnitPrice+'|'+oppLine.CurrencyIsoCode;//+'\\|'+oppLine.Discount;
            }
        }
        
        Order Ord = new Order(AccountId = opp.AccountId, Status = 'Draft', CurrencyIsoCode = opp.CurrencyIsoCode, Created_From_TradeGecko__c = FALSE, EffectiveDate	= date.today(), Issue_Date__c = date.today(), Item_Name__c = itemName);
        
        system.debug('SYA ::'+Ord);
        
        ordToInsert.add(Ord);
    }
    
    try
    {
        insert ordToInsert;
    }catch(Exception ex)
    {
        system.debug('SYA ::'+ex);
    }
}