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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * ownCloud - galleryplus  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This file is licensed under the Affero General Public License version 3 or  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * later. See the COPYING file.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Olivier Paroz <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @copyright Olivier Paroz 2016  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace OCA\GalleryPlus\Config;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Validates parsed configuration elements  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @package OCA\GalleryPlus\Config  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class ConfigValidator { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * Determines if the content of that sub-section is safe for web use  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param string $key the configuration sub-section identifier  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param array $parsedConfigItem the configuration for a sub-section  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	public function isConfigSafe($key, $parsedConfigItem) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$safe = true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		switch ($key) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			case 'sorting':  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$safe = $this->isSortingSafe('type', $parsedConfigItem, $safe); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$safe = $this->isSortingSafe('order', $parsedConfigItem, $safe); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				break;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			case 'design':  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$safe = $this->isDesignColourSafe($parsedConfigItem, $safe);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				break;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return $safe;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * Determines if the sorting type found in the config file is safe for web use  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param string $key will specify the key to check 'type' or 'order'  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param array $parsedConfigItem the sorting configuration to analyse  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param bool $safe whether the current config has been deemed safe to use so far  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @return bool  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                	 */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	private function isSortingSafe($key, $parsedConfigItem, $safe) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                		if ($safe && array_key_exists($key, $parsedConfigItem)) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                			$safe = $safe && $this->sortingValidator($key, $parsedConfigItem[$key]);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		return $safe;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * Determines if the background colour found in the config file is safe for web use  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param array $parsedConfigItem the design configuration to analyse  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param bool $safe whether the current config has been deemed safe to use so far  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	private function isDesignColourSafe($parsedConfigItem, $safe) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		if (array_key_exists('background', $parsedConfigItem)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$background = $parsedConfigItem['background'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$safe = $safe && ctype_xdigit(substr($background, 1));  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return $safe;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * Validates the parsed sorting values against allowed values  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param string $section the section in the sorting config to be analysed  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param string $value the value found in that section  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	private function sortingValidator($section, $value) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		if ($section === 'type') { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$validValues = ['date', 'name'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		} else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$validValues = ['des', 'asc'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		return in_array($value, $validValues);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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