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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class Order_QuickDispatch extends DataExtension  | 
            
                            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private static $remove_parent_log_field = false;  | 
            
                            
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                    private static $db = array(  | 
            
                            
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                        'HasBeenDispatched' => 'Boolean'  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private static $field_labels = array(  | 
            
                            
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                        'HasBeenDispatched' => 'Has been dispatched'  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Update Fields  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return FieldList  | 
            
                            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function updateCMSFields(FieldList $fields)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $currentStatus = $this->owner->Status();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        //start hack  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if($currentStatus && $currentStatus->ClassName === 'OrderStep_Sent') { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $orderStepGood = OrderStep::get()->filter(array('Code' => 'OrderStep_QuickDispatch'))->first(); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if($orderStepGood && $this->owner->StatusID != $orderStepGood->ID) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $orderStepBad = OrderStep::get()->filter(array('Code' => 'OrderStep_Sent'))->first(); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                if($orderStepBad && $this->owner->StatusID == $orderStepBad->ID) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $this->owner->StatusID = $orderStepGood->ID;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $this->owner->write();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        //end hack  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if($currentStatus && $currentStatus instanceof OrderStep_QuickDispatch) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $allFields = Config::inst()->get('Order_QuickDispatch', 'remove_parent_log_field') ? false : true; | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if($allFields) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $headerField1 = HeaderField::create('QuickDispatchHeader1', ' - Option A: Quick Dispatch', 5); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $headerField1 = HiddenField::create('QuickDispatchHeader1'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $checkboxfield = OptionSetField::create(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'HasBeenDispatched',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'Has been dispatched',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    0 => _t('Order_QuickDispatch.NOT_YET', 'Not yet'), | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    1 => _t('Order_QuickDispatch.GONE', 'It\'s Gone') | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                )  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if(class_exists('DataObjectOneFieldUpdateController')) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $link = DataObjectOneFieldUpdateController::popup_link(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $ClassName = 'Order',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $FieldName = 'HasBeenDispatched',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $where = 'StatusID = '.$this->owner->StatusID,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $sort = 'ID',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $linkText = 'Batch Dispatch',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $titleField = "Title"  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $checkboxfield->setDescription('You can also do a: '.$link); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if($allFields) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $headerField2 = HeaderField::create('QuickDispatchHeader2', ' - Option B: Detailed Dispatch', 5); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $headerField2 = HiddenField::create('QuickDispatchHeader2'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $fields->addFieldsToTab(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'Root.Next',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $headerField1,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $checkboxfield,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    $headerField2  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                'OrderStatusLog_DispatchPhysicalOrder'  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if(! $allFields) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $fields->removeFieldFromTab(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    'Root.Next',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    'OrderStatusLog_DispatchPhysicalOrder'  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $fields->removeByName('HasBeenDispatched'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private static $_on_after_write_count_for_order_step_dispatch = array();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Event handler called after writing to the database.  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function onAfterWrite()  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $currentStatus = $this->owner->Status();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        if($currentStatus && $currentStatus instanceof OrderStep_QuickDispatch) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            if(!isset(self::$_on_after_write_count_for_order_step_dispatch[$this->owner->ID])) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                                self::$_on_after_write_count_for_order_step_dispatch[$this->owner->ID] = 0;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            if(self::$_on_after_write_count_for_order_step_dispatch[$this->owner->ID] < 2) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                                self::$_on_after_write_count_for_order_step_dispatch[$this->owner->ID]++;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                                $this->owner->tryToFinaliseOrder();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.