public class UploadAttachmentControllerVendorProdRev {
   
    public String selectedType {get;set;}
    public Boolean selectedAwesomeness {get;set;}
    public String description {get;set;}
    private Product_Review__c contact {get;set;}
    public String fileName {get;set;}
    public Blob fileBody {get;set;}
   
    public String contactproduct {get;set;}
   
    public UploadAttachmentControllerProdRev(ApexPages.StandardController controller) {
        this.contact = (Product_Review__c)controller.getRecord();
       
    
    }  
   
    // creates a new Product_Review_Attachment__c record
   
    private Database.SaveResult saveCustomAttachment() {
  
        Product_Review_Attachment__c obj = new Product_Review_Attachment__c();
        obj.Product_Review__c = contact.Id;
        obj.Product__c = contact.Product__c;
        obj.Description__c = description;
        obj.Document_type__c = selectedType;
        // fill out cust obj fields
        return Database.insert(obj);
    }
   
    // create an actual Attachment record with the Product_Review_Attachment__c as parent
             
    private Database.SaveResult saveStandardAttachment(Id parentId) {
    
        Database.SaveResult result;
       
        Attachment attachment = new Attachment();
        attachment.body = this.fileBody;
        attachment.name = this.fileName;
        attachment.parentId = parentId;
        // insert the attahcment
        result = Database.insert(attachment);
        // reset the file for the view state
        fileBody = Blob.valueOf(' ');
        return result;
    }
   
    /**
    * Upload process is:
    *  1. Insert new Product_Review_Attachment__c record
    *  2. Insert new Attachment with the new Product_Review_Attachment__c record as parent
    *  3. Update the Product_Review_Attachment__c record with the ID of the new Attachment
    **/
    public PageReference processUpload() {
   
        if(description =='' & filebody==null)
                {
                ApexPages.AddMessage(new ApexPages.Message(ApexPages.Severity.ERROR,
                'You must include either a file or a Description.'));
                    return null;
                }
   
   
    try {
            Database.SaveResult customAttachmentResult = saveCustomAttachment();
       
            if (!customAttachmentResult.isSuccess()) {
                //ApexPages.AddMessage(new ApexPages.Message(ApexPages.Severity.ERROR,
                  //'Could not save attachment because either filebody was empty or the customAttachmentResult was unsuccessful.'));
                return null;
                system.debug('customattachmentresult **************!!! ');
                return new PageReference('/'+contact.Id);
            }
      
            Database.SaveResult attachmentResult = saveStandardAttachment(customAttachmentResult.getId());
       
            if (attachmentResult == null || !attachmentResult.isSuccess()) {
                //ApexPages.AddMessage(new ApexPages.Message(ApexPages.Severity.ERROR,
                  //'Could not save attachment.'));           
                //return null;
                return new PageReference('/'+contact.Id);
            } else {
                // update the custom attachment record with some attachment info
                Product_Review_Attachment__c customAttachment = [select id from Product_Review_Attachment__c where id = :customAttachmentResult.getId()];
                customAttachment.name = this.fileName;
                customAttachment.Attachment__c = attachmentResult.getId();
                update customAttachment;
            }
       
       } catch (Exception e) {
          ApexPages.AddMessages(e);
          return null;
       }
       
        return new PageReference('/'+contact.Id);
    }
   
    public PageReference back() {
        return new PageReference('/'+contact.Id);
    }    
}