<?php

defined('_JEXEC') or die('Access denied');

jimport('joomla.application.component.view');
jimport('joomla.environment.request');
jimport('joomla.log.log');

class OpenAireViewAdvancedSearchDatasets extends JViewLegacy {
	const LOG = 'openaire';
	const MODEL = 'search';
	const TITLE = 'title';
	const AUTHOR = 'author';
	const PUBLISHER = 'publisher';
	const SUBJECT = 'subject';
	const ALL = 'all';
	const ANY = 'any';
	const DEFAULT_PAGE = 1;
	const MIN_SIZE = 10;
	const MAX_SIZE = 50;
	const SIZE_STEP = 10;	
	const DEFAULT_FROM_MONTH = 1;
	const DEFAULT_TO_MONTH = 12;
	const MAX_PAGES = 5;
	
	public function __construct($configuration = array()) {
		parent :: __construct($configuration);
	}
	
	function display($template = NULL) {
		$locale = JFactory :: getLanguage() -> getTag();
		$model = $this -> getModel(self :: MODEL);
		$this -> statistics = $model -> getDatasetStatistics($locale,true);
		$this -> minYear = ($this -> statistics['year'] -> data == NULL) ? date('Y') : min(array_keys($this -> statistics['year'] -> data));
		$this -> maxYear = ($this -> statistics['year'] -> data == NULL) ? date('Y') : max(array_keys($this -> statistics['year'] -> data));
		$input = JFactory :: getApplication() -> input;
		$this -> itemId = JRequest :: getUInt('Itemid', 0);
		$this -> keywords = $this -> getParameter('keyword');
		$this -> fields = $this -> getParameter('field');
		$this -> constraints = $this -> getParameter('constraint');
		$this -> types = $this -> getParameter('type');
		$this -> languages = $this -> getParameter('language');
		$this -> funders = $this -> getParameter('funder');
		$this -> fundingStreams = $this -> getParameter('fundingStream');
		$this -> scientificAreas = $this -> getParameter('scientificArea');
                $this -> fundingStreamsLevel2 = $this -> getParameter('fundingStreamLevel2');
		$this -> date = JRequest :: getInt('date', -1);
		$this -> fromMonth = JRequest :: getUInt('fromMonth', self :: DEFAULT_FROM_MONTH);
		$this -> fromYear = JRequest :: getUInt('fromYear', $this -> minYear);
		$this -> toMonth = JRequest :: getUInt('toMonth', self :: DEFAULT_TO_MONTH);
		$this -> toYear = JRequest :: getUInt('toYear', $this -> maxYear);
		$this -> accessModes = $this -> getParameter('accessMode');
		$this -> datasources = $this -> getParameter('datasource');
		$this -> filters = array();
		$type = JRequest :: getString('typeFilter');
		if ($type != NULL) {
			$this -> filters['typeFilter'] = new JObject();
			$this -> filters['typeFilter'] -> name = 'typeFilter';
			$this -> filters['typeFilter'] -> value = $type;
		}
		$language = JRequest :: getString('languageFilter');
		if ($language != NULL) {
			$this -> filters['languageFilter'] = new JObject();
			$this -> filters['languageFilter'] -> name = 'languageFilter';
			$this -> filters['languageFilter'] -> value = $language;
		}
		$funder = JRequest :: getString('funderFilter');
		if ($funder != NULL) {
			$this -> filters['funderFilter'] = new JObject();
			$this -> filters['funderFilter'] -> name = 'funderFilter';
			$this -> filters['funderFilter'] -> value = $funder;
		}
		$fundingStream = JRequest :: getString('fundingStreamFilter');
		if ($fundingStream != NULL) {
			$this -> filters['fundingStreamFilter'] = new JObject();
			$this -> filters['fundingStreamFilter'] -> name = 'fundingStreamFilter';
			$this -> filters['fundingStreamFilter'] -> value = $fundingStream;
		}
		$scientificArea = JRequest :: getString('fundingStreamLevel1Filter');
		if ($scientificArea != NULL) {
			$this -> filters['fundingStreamLevel1Filter'] = new JObject();
			$this -> filters['fundingStreamLevel1Filter'] -> name = 'fundingStreamLevel1Filter';
			$this -> filters['fundingStreamLevel1Filter'] -> value = $scientificArea;
		}
                $fundingStreamLevel2 = JRequest :: getString('fundingStreamLevel2Filter');
		if ($fundingStreamLevel2 != NULL) {
			$this -> filters['fundingStreamLevel2Filter'] = new JObject();
			$this -> filters['fundingStreamLevel2Filter'] -> name = 'fundingStreamLevel2Filter';
			$this -> filters['fundingStreamLevel2Filter'] -> value = $fundingStreamLevel2;
		} 
		$year = JRequest :: getString('yearFilter');
		if ($year != NULL) {
			$this -> filters['yearFilter'] = new JObject();
			$this -> filters['yearFilter'] -> name = 'yearFilter';
			$this -> filters['yearFilter'] -> value = $year;
		}
		$accessMode = JRequest :: getString('accessModeFilter');
		if ($accessMode != NULL) {
			$this -> filters['accessModeFilter'] = new JObject();
			$this -> filters['accessModeFilter'] -> name = 'accessModeFilter';
			$this -> filters['accessModeFilter'] -> value = $accessMode;
		}
		$datasource = JRequest :: getString('datasourceFilter');
		if ($datasource != NULL) {
			$this -> filters['datasourceFilter'] = new JObject();
			$this -> filters['datasourceFilter'] -> name = 'datasourceFilter';
			$this -> filters['datasourceFilter'] -> value = $datasource;
		}
		$this -> page = JRequest :: getUInt('page', self :: DEFAULT_PAGE);
		$this -> size = JRequest :: getUInt('size', self :: MIN_SIZE);
                $this -> size = ($this -> size > self :: MAX_SIZE || $this -> size < 1) ? self :: MIN_SIZE : $this -> size;
		if ((($this -> keywords != NULL) && ($this -> fields != NULL) && ($this -> constraints != NULL)) || ($this -> types != NULL) || ($this -> languages != NULL) || ($this -> funders != NULL) || ($this -> fundingStreams != NULL) || ($this -> scientificAreas != NULL)|| ($this -> fundingStreamsLevel2 != NULL) || ($this -> date != -1) || ($this -> accessModes != NULL) || ($this -> datasources != NULL)) {
		
			JViewLegacy :: loadHelper('PiwikHelper');
			PiwikHelper :: logPageView('Advanced Search Datasets');
			$this -> result = $model -> advancedSearchDatasets($this -> keywords, $this -> fields, $this -> constraints, $this -> types, $this -> languages, $this -> funders, $this -> fundingStreams, $this -> scientificAreas,$this -> fundingStreamsLevel2, $this -> date, $this -> fromMonth, $this -> fromYear, $this -> toMonth, $this -> toYear, $this -> accessModes, $this -> datasources, $type, $language, $funder, $fundingStream, $scientificArea, $fundingStreamLevel2, $year, $accessMode, $datasource, $this -> page, $this -> size, $locale);
 			$this -> totalPages = ($this -> result == NULL) ? NULL : ceil($this -> result -> totalDatasets / $this -> size);
			if ($this -> totalPages == NULL)
				$this -> totalPages = 1;
                        $this -> page = ($this -> page > $this -> totalPages)? $this -> totalPages:$this -> page;
			$this -> pagingStart = $this -> page;
			$this -> pagingEnd = $this -> page;
			while (($this -> pagingEnd - $this -> pagingStart < self :: MAX_PAGES - 1) && (($this -> pagingStart != 1) || ($this -> pagingEnd != $this -> totalPages))) {
				if ($this -> pagingStart > 1)
					$this -> pagingStart --;
				if ($this -> pagingEnd < $this -> totalPages)
					$this -> pagingEnd++;
			}			
		} else
			$this -> result = NULL;
		if (count($errors = $this -> get('Errors')) > 0) {
			JLog :: add('Error viewing advancedsearchdatasets: ' . implode("\n", $errors), JLog :: ERROR, self :: LOG);
			return FALSE;
		}
		parent :: display($template);
	}
		
	private function getParameter($name) {
		$values = JFactory :: getApplication() -> input -> get($name, NULL, NULL);
		if ($values == NULL)
			$values = array();
		else if (!is_array($values)) {
			$value = $values;
			$values = array();
			$values[] = $value;
		}
		return $values;
	}
}