<?php

/**
 * @file classes/reviewForm/ReviewFormDAO.inc.php
 *
 * Copyright (c) 2014-2019 Simon Fraser University
 * Copyright (c) 2000-2019 John Willinsky
 * Distributed under the GNU GPL v2. For full terms see the file docs/COPYING.
 *
 * @class ReviewFormDAO
 * @ingroup reviewForm
 * @see ReviewerForm
 *
 * @brief Operations for retrieving and modifying ReviewForm objects.
 *
 */

import('lib.pkp.classes.reviewForm.ReviewForm');

class ReviewFormDAO extends DAO {

	/**
	 * Retrieve a review form by ID.
	 * @param $reviewFormId int
	 * @param $assocType int optional
	 * @param $assocId int optional
	 * @return ReviewForm
	 */
	function getById($reviewFormId, $assocType = null, $assocId = null) {
		$params = array((int) $reviewFormId);
		if ($assocType) {
			$params[] = (int) $assocType;
			$params[] = (int) $assocId;
		}

		$result = $this->retrieve (
			'SELECT	rf.*,
				SUM(CASE WHEN ra.date_completed IS NOT NULL THEN 1 ELSE 0 END) AS complete_count,
				SUM(CASE WHEN ra.review_id IS NOT NULL AND ra.date_completed IS NULL THEN 1 ELSE 0 END) AS incomplete_count
			FROM	review_forms rf
				LEFT JOIN review_assignments ra ON (ra.review_form_id = rf.review_form_id AND ra.declined<>1)
			WHERE	rf.review_form_id = ? AND rf.assoc_type = ? AND rf.assoc_id = ?
			GROUP BY rf.review_form_id',
			$params
		);

		$returner = null;
		if ($result->RecordCount() != 0) {
			$returner = $this->_fromRow($result->GetRowAssoc(false));
		}

		$result->Close();
		return $returner;
	}

	/**
	 * Construct a new data object corresponding to this DAO.
	 * @return ReviewForm
	 */
	function newDataObject() {
		return new ReviewForm();
	}

	/**
	 * Internal function to return a ReviewForm object from a row.
	 * @param $row array
	 * @return ReviewForm
	 */
	function _fromRow($row) {
		$reviewForm = $this->newDataObject();
		$reviewForm->setId($row['review_form_id']);
		$reviewForm->setAssocType($row['assoc_type']);
		$reviewForm->setAssocId($row['assoc_id']);
		$reviewForm->setSequence($row['seq']);
		$reviewForm->setActive($row['is_active']);
		$reviewForm->setCompleteCount($row['complete_count']);
		$reviewForm->setIncompleteCount($row['incomplete_count']);

		$this->getDataObjectSettings('review_form_settings', 'review_form_id', $row['review_form_id'], $reviewForm);

		HookRegistry::call('ReviewFormDAO::_fromRow', array(&$reviewForm, &$row));

		return $reviewForm;
	}

	/**
	 * Check if a review form exists with the specified ID.
	 * @param $reviewFormId int
	 * @param $assocType int
	 * @param $assocId int
	 * @return boolean
	 */
	function reviewFormExists($reviewFormId, $assocType, $assocId) {
		$result = $this->retrieve(
			'SELECT COUNT(*) FROM review_forms WHERE review_form_id = ? AND assoc_type = ? AND assoc_id = ?',
			array((int) $reviewFormId, (int) $assocType, (int) $assocId)
		);
		$returner = isset($result->fields[0]) && $result->fields[0] == 1 ? true : false;

		$result->Close();
		return $returner;
	}

	/**
	 * Get the list of fields for which data can be localized.
	 * @return array
	 */
	function getLocaleFieldNames() {
		return array('title', 'description');
	}

	/**
	 * Update the localized fields for this table
	 * @param $reviewForm object
	 */
	function updateLocaleFields(&$reviewForm) {
		$this->updateDataObjectSettings('review_form_settings', $reviewForm, array(
			'review_form_id' => $reviewForm->getId()
		));
	}

	/**
	 * Insert a new review form.
	 * @param $reviewForm ReviewForm
	 */
	function insertObject($reviewForm) {
		$this->update(
			'INSERT INTO review_forms
				(assoc_type, assoc_id, seq, is_active)
				VALUES
				(?, ?, ?, ?)',
			array(
				(int) $reviewForm->getAssocType(),
				(int) $reviewForm->getAssocId(),
				$reviewForm->getSequence() == null ? 0 : (float) $reviewForm->getSequence(),
				$reviewForm->getActive()?1:0
			)
		);

		$reviewForm->setId($this->getInsertId());
		$this->updateLocaleFields($reviewForm);

		return $reviewForm->getId();
	}

	/**
	 * Update an existing review form.
	 * @param $reviewForm ReviewForm
	 */
	function updateObject($reviewForm) {
		$returner = $this->update(
			'UPDATE review_forms
				SET
					assoc_type = ?,
					assoc_id = ?,
					seq = ?,
					is_active = ?
				WHERE review_form_id = ?',
			array(
				(int) $reviewForm->getAssocType(),
				(int) $reviewForm->getAssocId(),
				(float) $reviewForm->getSequence(),
				$reviewForm->getActive()?1:0,
				(int) $reviewForm->getId()
			)
		);

		$this->updateLocaleFields($reviewForm);

		return $returner;
	}

	/**
	 * Delete a review form.
	 * @param $reviewForm ReviewForm
	 */
	function deleteObject($reviewForm) {
		return $this->deleteById($reviewForm->getId());
	}

	/**
	 * Delete a review form by Id.
	 * @param $reviewFormId int
	 */
	function deleteById($reviewFormId) {
		$reviewFormElementDao = DAORegistry::getDAO('ReviewFormElementDAO');
		$reviewFormElementDao->deleteByReviewFormId($reviewFormId);

		$this->update('DELETE FROM review_form_settings WHERE review_form_id = ?', (int) $reviewFormId);
		$this->update('DELETE FROM review_forms WHERE review_form_id = ?', (int) $reviewFormId);
	}

	/**
	 * Delete all review forms by assoc Id.
	 * @param $assocType int
	 * @param $assocId int
	 */
	function deleteByAssoc($assocType, $assocId) {
		$reviewForms = $this->getByAssocId($assocType, $assocId);

		while ($reviewForm = $reviewForms->next()) {
			$this->deleteById($reviewForm->getId());
		}
	}

	/**
	 * Get all review forms by assoc id.
	 * @param $assocType int
	 * @param $assocId int
	 * @param $rangeInfo RangeInfo (optional)
	 * @return DAOResultFactory containing matching ReviewForms
	 */
	function getByAssocId($assocType, $assocId, $rangeInfo = null) {
		$result = $this->retrieveRange(
			'SELECT rf.*,
				SUM(CASE WHEN ra.date_completed IS NOT NULL THEN 1 ELSE 0 END) AS complete_count,
				SUM(CASE WHEN ra.review_id IS NOT NULL AND ra.date_completed IS NULL THEN 1 ELSE 0 END) AS incomplete_count
			FROM	review_forms rf
				LEFT JOIN review_assignments ra ON (ra.review_form_id = rf.review_form_id AND ra.declined<>1)
			WHERE   rf.assoc_type = ? AND rf.assoc_id = ?
			GROUP BY rf.review_form_id
			ORDER BY rf.seq',
			array((int) $assocType, (int) $assocId), $rangeInfo
		);

		return new DAOResultFactory($result, $this, '_fromRow');
	}

	/**
	 * Get active review forms for an associated object.
	 * @param $assocType int
	 * @param $assocId int
	 * @param $rangeInfo object RangeInfo object (optional)
	 * @return DAOResultFactory containing matching ReviewForms
	 */
	function getActiveByAssocId($assocType, $assocId, $rangeInfo = null) {
		$result = $this->retrieveRange(
			'SELECT	rf.*,
				SUM(CASE WHEN ra.date_completed IS NOT NULL THEN 1 ELSE 0 END) AS complete_count,
				SUM(CASE WHEN ra.review_id IS NOT NULL AND ra.date_completed IS NULL THEN 1 ELSE 0 END) AS incomplete_count
			FROM	review_forms rf
				LEFT JOIN review_assignments ra ON (ra.review_form_id = rf.review_form_id AND ra.declined<>1)
			WHERE	rf.assoc_type = ? AND rf.assoc_id = ? AND rf.is_active = 1
			GROUP BY rf.review_form_id
			ORDER BY rf.seq',
			array((int) $assocType, (int) $assocId), $rangeInfo
		);

		return new DAOResultFactory($result, $this, '_fromRow');
	}

	/**
	 * Check if a review form exists with the specified ID.
	 * @param $reviewFormId int
	 * @param $assocType int optional
	 * @param $assocId int optional
	 * @return boolean
	 */
	function unusedReviewFormExists($reviewFormId, $assocType = null, $assocId = null) {
		$reviewForm = $this->getById($reviewFormId, $assocType, $assocId);
		if (!$reviewForm) return false;
		if ($reviewForm->getCompleteCount()!=0 || $reviewForm->getIncompleteCount()!=0) return false;
		return true;
	}

	/**
	 * Sequentially renumber review form in their sequence order.
	 * @param $assocType int
	 * @param $assocId int
	 */
	function resequenceReviewForms($assocType, $assocId) {
		$result = $this->retrieve(
			'SELECT review_form_id FROM review_forms WHERE assoc_type = ? AND assoc_id = ? ORDER BY seq',
			array((int) $assocType, (int) $assocId)
		);

		for ($i=1; !$result->EOF; $i++) {
			list($reviewFormId) = $result->fields;
			$this->update(
				'UPDATE review_forms SET seq = ? WHERE review_form_id = ?',
				array(
					$i,
					$reviewFormId
				)
			);

			$result->MoveNext();
		}
		$result->Close();
	}

	/**
	 * Get the ID of the last inserted review form.
	 * @return int
	 */
	function getInsertId() {
		return $this->_getInsertId('review_forms', 'review_form_id');
	}
}


