<?php
namespace Reference;

use \Helpers\View as view;
use \Helpers\dbh;
use \Reference\Listener\RisListener;
use \Files\Files;
use \LibRIS\RISReader;
use \LibRIS\RISTags;
use \LibRIS\RISWriter;

class Ris
{
	private $db;				//传入PDO对象.
	private $config;			//站点设置
	private $dbh;
	
	protected $events = NULL;
	public $table;
	public $ris_records = NULL;
		
	function __construct($db = NULL,$mail = NULL)
	{
		if(empty($db))
		{
			$this->db = \Zend_Registry::get('db');
		}else{
			$this->db = $db;
		}
		
		$this->config = \Zend_Registry::get('config');
		
		$Listener = new RisListener();
		@$this->events()->attachAggregate($Listener);
		
		$this->table = new \Helpers\Table();
	}
	
	public function events(\Zend_EventManager_EventCollection $events = NULL)
    {
        if ($events !== NULL) {
            $this->events = $events;
        } elseif ($this->events === NULL) {
            $this->events = new \Zend_EventManager_EventManager(__CLASS__);
        }
        return $this->events;
    }
	
	//ris导入
	public function loadout()
	{
		$file = $this->uploadRisFile();
		$text = $this->loadRisText();
		
		if(empty($text) && $file === false)
		{
			return "导入失败，请选择要导入的文件或直接使用ris文本";
		}
		
		$records = array();
		
		if($file !== false)
		{
			$records = array_merge($records,$this->processRis($file,NULL));
		}
		
		if(!empty($text))
		{
			$records = array_merge($records,$this->processRis(NULL,$text));
		}
		
		$this->ris_records = $records;
		
		$data = $this->reBuildRisArray($records);
		return $data;
	}
	
	//上传RIS文件
	public function uploadRisFile()
	{
		if(!isset($_FILES['Filedata']))
		{
			return;
		}
		
		$file = $_FILES['Filedata'];
		
		if (@is_uploaded_file($file['tmp_name']) === false) {
			return;
		}
		
		return $file;
	}
	
	//文本直接导入
	public function loadRisText()
	{
		if(!isset($_REQUEST['ristext']))
		{
			return;
		}
		
		$text = $_REQUEST['ristext'];
		return $text;
	}
	
	//处理ris文件
	public function processRis($file = NULL,$text = NULL)
	{
		$ris = new RISReader();
		if(!empty($file) && empty($text))
		{
			$ris->parseFile($file['tmp_name']);
		}else{
			$ris->parseString($text);
		}
		
		$records = $ris->getRecords();
		
		return $records;
	}
	
	//对解析过的数据进行编排
	public function reBuildRisArray($records)
	{
		$data = array();
		foreach($records as $k=>$ref)
		{
			$data[$k] = array();
			foreach($ref as $index=>$value)
			{
				if(isset($this->attr[$index]))
				{
					$index_name = $this->attr[$index];
					if(count($value) > 1)
					{
						$data[$k][$index_name] = array();
						foreach($value as $item)
						{
							$data[$k][$index_name][] = $item;
						}
					}else{
						$data[$k][$index_name] = $value[0];
					}
				}
			}
		}
		unset($records);
		return $data;
	}
	
	//将解析好的ris数据写入数据库
	public function pushToDataTable($data){
		
		if(!is_array($data) || count($data) < 1)
		{
			return false;
		}
		
		$dbh = $this->dbh = new dbh();
		
		foreach($data as $k=>$ref)
		{
			if (is_null($ref['title'])) 
			{
				return;
			}
			
			@$tags = $ref['tags'];
			@$author = $ref['author'];
			
			$ref['ris'] = $this->makeRisData(array(0=>$this->ris_records[$k]));		
			
			$results = $this->events()->trigger('checkLoad', $this, compact('ref'));
			$id = $results->bottom();
			
			if ($id > 0)
			{
				$this->unsetVar($ref);
				$this->events()->trigger('deleteAuthor', $this, compact('id'));
				$this->events()->trigger('deleteTag', $this, compact('id'));
				
				unset($ref['reference']);
				
				$dbh->update($this->table->reference,$ref," id=$id ");
			} else {
				$ref['reference'] =  $this->makeReferenceFlag($ref);
				$this->unsetVar($ref);
				$id = $dbh->insert($this->table->reference,$ref,true);
			}
			
			$this->insertTags($id,$tags);
			$this->insertAuthor($id,$author);
		}
	}
	
	//更新单个reference的RIS
	public function updateWithRis($id,$ref)
	{
		if(empty($id) || !is_numeric($id))
		{
			return false;
		}
		
		if (is_null($ref['title'])) 
		{
			return;
		}
		
		@$tags = $ref['tags'];
		@$author = $ref['author'];
		
		$ref['ris'] = $this->makeRisData(array(0=>$this->ris_records[0]));		

		$this->events()->trigger('deleteAuthor', $this, compact('id'));
		$this->events()->trigger('deleteTag', $this, compact('id'));
		
		$this->unsetVar($ref);
		if(isset($ref['reference'])) unset($ref['reference']);
		
		$this->dbh = $dbh = new dbh();
		
		if($dbh->update($this->table->reference,$ref," id=$id "))
		{
			$this->insertTags($id,$tags);
			$this->insertAuthor($id,$author);
			return true;
		}else{
			return false;
		}
		
	}
	
	//写入标签
	public function insertTags($id,$tags){
		if(is_array($tags) && count($tags) > 0)
		{
			foreach($tags as $v)
			{
				$this->dbh->insert($this->table->reference_tag,array('id'=>$id,'tag'=>$v));
			}
			return true;
		}else{
			return false;
		}
	}
	
	//写入作者
	public function insertAuthor($id,$author)
	{
		$index = 0;
		if(is_array($author) && count($author) > 0)
		{
			foreach($author as $v)
			{
				$index ++ ;
				$author_splited = $this->splitAuthor($v);
				$this->dbh->insert($this->table->reference_author,array('id'=>$id , 'lastname'=>$author_splited['lastname'] , 'firstname'=>$author_splited['firstname'] , 'place'=>$index ));
			}
			return true;
		}else{
			if(is_string($author))
			{
				$author_splited = $this->splitAuthor($author);
				$this->dbh->insert($this->table->reference_author,array('id'=>$id , 'lastname'=>$author_splited['lastname'] , 'firstname'=>$author_splited['firstname'] , 'place'=>0 ));
			}
			return false;
		}
	}
	
	//创建ris格式的数据
	public function makeRisData($ref)
	{
		$ris_writer = new RISWriter();
		return $ris_writer->writeRecords($ref);
	}
	
	//创建reference 字段
	public function makeReferenceFlag($ref){
		$str='';
		if(is_array($ref['author']) && count($ref['author']) > 0)
		{
			$str .= join(', ',$ref['author']).'. ';
		} else if (is_string($ref['author'])) {
			$str .= $ref['author'].'. ';
		}
		$str .= $ref['title'].'. ';
		$str .= $ref['publisher'].', ';
		isset($ref['year']) ? 	$str .= $ref['year'].', ':"";
		isset($ref['volume']) ? $str .= $ref['volume']:"";
		isset($ref['issue']) ? 	$str .= '('.$ref['issue'].')':"";
		isset($ref['pages']) ? 	$str .= ':'.$ref['pages']:"";
		isset($ref['endpage'])?	$str .= '-'.$ref['endpage']:"";
		isset($ref['doi']) ? 	$str .= '. doi:'.$ref['doi'] : "";

		return $str;
	}
	
	//卸载不需要的变量
	public function unsetVar(&$ref)
	{
		unset($ref['pages']);
		unset($ref['endpage']);
		unset($ref['issue']);
		unset($ref['volume']);
		unset($ref['tags']);
		unset($ref['author']);
	}
	
	//将作者名字分割为数组
	public function splitAuthor($author){
		if(preg_match("/\,/",$author))
		{
			$arr = explode(",",$author);
			return array(
				'lastname' => trim($arr[0]),
				'firstname' => trim($arr[1])
			);
		}else{
			return array(
				'firstname' => '',
				'lastname' => trim($author)
			);
		}
	}
	
	public $attr = array(
		'TY' => 'type',
		'TI' => 'title',
		'AU' => 'author',
		'PY' => 'year',
		'LA' => 'language',
		'KW' => 'tags',
		'AB' => 'abstract',
		'DO' => 'doi',
		'T2' => 'publisher',
		'VL' => 'volume',
		'IS' => 'issue',
		'SP' => 'pages',
		'EP' => 'endpage'
	);
}