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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /*  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * citeproc-php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @link        http://github.com/seboettg/citeproc-php for the source repository  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @copyright   Copyright (c) 2016 Sebastian Böttger.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @license     https://opensource.org/licenses/MIT  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Seboettg\CiteProc\Constraint;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Seboettg\CiteProc\CiteProc;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Seboettg\Collection\ArrayList;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use stdClass;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Class Position  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Tests whether the cite position matches the given positions (terminology: citations consist of one or more cites to  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * individual items). When called within the scope of cs:bibliography, position tests “false”. The positions that can  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * be tested are:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *   - “first”: position of cites that are the first to reference an item  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *   - “ibid”/”ibid-with-locator”/”subsequent”: cites referencing previously cited items have the “subsequent” position.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *     Such cites may also have the “ibid” or “ibid-with-locator” position when:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *     a) the current cite immediately follows on another cite, within the same citation, that references the  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *        same item, or  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *     b) the current cite is the first cite in the citation, and the previous citation consists of a single cite  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *        referencing the same item  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *     If either requirement is met, the presence of locators determines which position is assigned:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *     -  Preceding cite does not have a locator: if the current cite has a locator, the position of the current cite is  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *        “ibid-with-locator”. Otherwise the position is “ibid”.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *     -  Preceding cite does have a locator: if the current cite has the same locator, the position of the current cite  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *        is “ibid”. If the locator differs the position is “ibid-with-locator”. If the current cite lacks a locator  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *        its only position is “subsequent”.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *   - “near-note”: position of a cite following another cite referencing the same item. Both cites have to be located  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *     in foot or endnotes, and the distance between both cites may not exceed the maximum distance (measured in number  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *     of foot or endnotes) set with the near-note-distance option.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Whenever position=”ibid-with-locator” tests true, position=”ibid” also tests true. And whenever position=”ibid” or  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * position=”near-note” test true, position=”subsequent” also tests true.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @package Seboettg\CiteProc\Constraint  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Sebastian Böttger <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class Position implements Constraint  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const FIRST = "first";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const IBID = "ibid";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const IBID_WITH_LOCATOR = "ibid-with-locator";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const SUBSEQUENT = "subsequent";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    const NEAR_NOTE = "near-note";  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $value;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $match;  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    public function __construct($value, $match = "all")  | 
            
                            
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                    { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->value = $value;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->match = $match;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @codeCoverageIgnore  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param stdClass $object  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param int|null $citationNumber  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function validate($object, $citationNumber = null)  | 
            
                            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (CiteProc::getContext()->isModeBibliography()) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        switch ($this->value) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            case self::FIRST:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                return $this->getPosition($object) === null;  | 
            
                            
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                            case self::IBID:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            case self::IBID_WITH_LOCATOR:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            case self::SUBSEQUENT:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                return $this->isOnLastPosition($object);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private function getPosition($object)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        foreach (CiteProc::getContext()->getCitedItems() as $key => $value) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            if (!empty($value->{'id'}) && $value->{'id'} === $object->{'id'}) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                                return $key;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param stdClass $object  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private function isOnLastPosition($object): bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $lastCitedItem = CiteProc::getContext()->getCitedItems()->last();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return !empty($lastCitedItem) ? $lastCitedItem->{'id'} === $object->{'id'} : false; | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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