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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class UpdateSecondHandProduct extends Controller  | 
            
                            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private static $allowed_actions = array(  | 
            
                            
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                        'unpublish' => '->MyPermissionCheck',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        'archive' => '->MyPermissionCheck'  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * make the page less easy to access  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * (but still accessible)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * - code => ip address  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private static $secret_codes = array();  | 
            
                            
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                    function init()  | 
            
                            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        parent::init();  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        if(! $this->MyPermissionCheck()) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                            die('you do not have access'); | 
            
                            
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                        }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    function unpublish($request)  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $otherID = $request->param("OtherID"); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if(isset($otherID)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $internalItemID = Convert::raw2sql($otherID);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $secondHandProduct = SecondHandProduct::get()->filter(['internalItemID' => $internalItemID])->first();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if($secondHandProduct){ | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $secondHandProduct->deleteFromStage('Live'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    function archive($request)  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $otherID = $request->param("OtherID"); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if(isset($otherID)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $internalItemID = Convert::raw2sql($otherID);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $secondHandProduct = SecondHandProduct::get()->filter(['internalItemID' => $internalItemID])->first();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if (is_a($secondHandProduct, Object::getCustomClass('SiteTree'))) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $secondHandProduct->deleteFromStage('Live'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $secondHandProduct->deleteFromStage('Stage'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            } else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $secondHandProduct->delete();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return Boolean  | 
            
                            
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                     */  | 
            
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
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                View Code Duplication | 
                    function MyPermissionCheck()  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $codesWithIPs = $this->Config()->get('secret_codes'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        //with a code you do not have to be logged in ...  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if(count($codesWithIPs)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $ip = EcommerceCountry::get_ip();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $code = $this->request->param('ID'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if($code) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                $testIP = isset($codesWithIPs[$code]) ? $codesWithIPs[$code] : false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                if($testIP) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    if($testIP === $ip || $testIP === '*') { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                        return true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return Permission::check('ADMIN'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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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.