trigger new_chatter_update_trigger on OpportunityLineItem (after update) 
{
    //Setup the Feedpost array of items to post to Chatter
    List<FeedPost> posts = new List<FeedPost>();
    
    //Setup the array to hold the ids to Iterate through
    Set<Id> pbeIds = new Set<Id>();
    
    //Iterate through the Line Items
    for (OpportunityLineItem oli : Trigger.new) 
    {   
       // Create individual post
       pbeIds.add(oli.PricebookEntryId);
       pbeIds.add(oli.opportunityId); 
    }
    
    //Setup APEX MAP Arrays to get the required data from the Pricebook and Opportunity 
    Map<Id, PricebookEntry> entries = new Map<Id, PricebookEntry>([select Product2.ProductCode from PricebookEntry where id in :pbeIds]);
    Map<Id, Opportunity> Opp = new Map<Id, Opportunity>([select Account.Name, Account.ID from Opportunity where id in :pbeIds]);
    
    
    //Iterate through the line items once again to add the data to the Chatter Object
    for (OpportunityLineItem oli : Trigger.new)
    {
           OpportunityLineItem oldOLI = Trigger.oldMap.get (oli.id);
           //If the part outcomes are different, let's add to the chatter feed
           if(oli.Part_Outcome__c != oldOli.Part_Outcome__c)           
           {
                  
                  //Let's add the PriceBookEntrty Id to ge the Product name
                  String bodyText = 'has updated the ' +entries.get(oli.Pricebookentryid).Product2.ProductCode+ 
                                    ' from ' +oldOLI.Part_Outcome__c+ ' to ' +oli.Part_Outcome__c+ ' on Account: ' +opp.get(oli.OpportunityId).Account.Name+''; 
                  FeedPost opportunityPost = new Feedpost();    
               opportunityPost.parentId = oli.opportunityId;
               //String bodyText = 'This is the body ';                                                
               opportunityPost.Type = 'LinkPost';
               opportunityPost.Title = '' +entries.get(oli.Pricebookentryid).Product2.ProductCode+ ' socket details';
               opportunityPost.Body = bodyText;
               String id = String.valueOf(oli.Id).substring(0,15);
               opportunityPost.LinkURL = 'https://na2.salesforce.com/' +id;
               posts.add(opportunityPost);
           }
           
           //if the max potential has increased by a million, let's add to the chatter feed
           if(oli.Max_Potential__c >= oldOLI.Max_Potential__c + 1000000)
           {
             decimal NewWholeMaxPotential = oli.Max_Potential__c;
                 decimal maxpotentialdifference = oli.Max_Potential__c/1.0 - oldOLI.Max_Potential__c/1.0;                                                             
                 FeedPost opportunityPost = new FeedPost ();
                 String bodyText = 'has increased the Max Potential of the '
                                   +entries.get(oli.Pricebookentryid).Product2.ProductCode+ ' by $' +maxpotentialdifference+ ' on Account: ' +opp.get(oli.OpportunityId).Account.Name+ '';
                 opportunityPost.Type = 'LinkPost';
                 opportunityPost.Title = ''+entries.get(oli.Pricebookentryid).Product2.ProductCode+' socket details';
                 opportunityPost.Body = bodyText;
                 String id = String.valueOf(oli.id).substring(0,15);
                 opportunityPost.LinkURL = 'https://na2.salesforce.com/'+id;
                 opportunityPost.ParentID = oli.opportunityid;
                 posts.add(opportunityPost);
                
                
               }  
       }    
              
    //if the post is empty, don't try and post it to Chatter    
    if(!posts.isEmpty())
    {
        insert posts;
    }    
    
}

trigger New_Feed_Update on OpportunityLineItem (before update)
{

  for (OpportunityLineItem oli : Trigger.new)
  {  
    oli.will_test__c = oli.id;  
  }

}

trigger CleanDRLineItem2 on Opportunity_Tracker_Products__c (before delete)
{
  //This is the ID of the record being deleted
  List <Id> otIds = new List<Id>();
  
    // Copy each record's id to the list
    for(Opportunity_Tracker_Products__c ot: Trigger.old)
    {
        otIds.add(ot.id);
    }
    
    // Single query - an array of the Design Registrations that need to be updated
    List <Design_Registration__c> oDRs = [select id, DP_reg_id__c, OwnerID, Inactive__c from Design_Registration__c where Opp_tracker_line_ID__c in :otIds];
 
    //Loop through all the Design Registrations which are returned from the query above
    //set 4 fields on each DR to specific values and inactivate the record
    for (Design_Registration__c dr: oDRs)
    {
                dr.OwnerId = '00540000000oJjiAAE';
                dr.Inactive__c = true;
                string old_dr_number = dr.DP_reg_id__c;
                dr.DP_reg_id__c = 'IN-' + old_dr_number;
                
    }
    update oDRs;
}