<?php

/**
 * @file classes/submission/EditDecisionDAO.inc.php
 *
 * Copyright (c) 2014-2017 Simon Fraser University
 * Copyright (c) 2003-2017 John Willinsky
 * Distributed under the GNU GPL v2. For full terms see the file docs/COPYING.
 *
 * @class EditDecisionDAO
 * @ingroup submission
 *
 * @brief Operations for retrieving and modifying editor decisions.
 */

// Bring in editor decision constants
// FIXME: These should be standardized into lib-pkp.
import('classes.workflow.EditorDecisionActionsManager');

class EditDecisionDAO extends DAO {

	/**
	 * Update the editor decision table.
	 * @param $submissionId int
	 * @param $editorDecision array
	 * @param $stageId int Optional STAGE_ID_...
	 * @param $reviewRound ReviewRound (optional)
	 */
	function updateEditorDecision($submissionId, $editorDecision, $stageId = null, $reviewRound = null) {
		if ($editorDecision['editDecisionId'] == null) {
			$this->update(
				sprintf(
					'INSERT INTO edit_decisions
					(submission_id, review_round_id, stage_id, round, editor_id, decision, date_decided)
					VALUES (?, ?, ?, ?, ?, ?, %s)',
					$this->datetimeToDB($editorDecision['dateDecided'])
				),
				array(
					(int) $submissionId,
					is_a($reviewRound, 'ReviewRound') ? (int) $reviewRound->getId() : 0,
					is_a($reviewRound, 'ReviewRound') ? $reviewRound->getStageId() : (int) $stageId,
					is_a($reviewRound, 'ReviewRound') ? (int) $reviewRound->getRound() : REVIEW_ROUND_NONE,
					(int) $editorDecision['editorId'],
					$editorDecision['decision']
				)
			);
		}
	}

	/**
	 * Delete editing decisions by submission ID.
	 * @param $submissionId int
	 */
	function deleteDecisionsBySubmissionId($submissionId) {
		return $this->update(
			'DELETE FROM edit_decisions WHERE submission_id = ?',
			(int) $submissionId
		);
	}

	/**
	 * Get the editor decisions for a review round of a submission.
	 * @param $submissionId int Submission ID
	 * @param $stageId int Optional STAGE_ID_...
	 * @param $round int Optional review round number
	 * @param $editorId int Optional editor ID
	 * @return array List of information on the editor decisions:
	 * 	editDecisionId, reviewRoundId, stageId, round, editorId, decision, dateDecided
	 */
	function getEditorDecisions($submissionId, $stageId = null, $round = null, $editorId = null) {
		$params = array((int) $submissionId);
		if ($stageId) $params[] = (int) $stageId;
		if ($round) $params[] = (int) $round;
		if ($editorId) $params[] = (int) $editorId;

		$result = $this->retrieve(
			'SELECT	edit_decision_id, editor_id, decision,
				date_decided, review_round_id, stage_id, round
			FROM	edit_decisions
			WHERE	submission_id = ?
				' . ($stageId?' AND stage_id = ?':'') . '
				' . ($round?' AND round = ?':'') . '
				' . ($editorId?' AND editor_id = ?':'') . '
				ORDER BY date_decided ASC',
			$params
		);

		$decisions = array();
		while (!$result->EOF) {
			$decisions[] = array(
				'editDecisionId' => $result->fields['edit_decision_id'],
				'reviewRoundId' => $result->fields['review_round_id'],
				'stageId' => $result->fields['stage_id'],
				'round' => $result->fields['round'],
				'editorId' => $result->fields['editor_id'],
				'decision' => $result->fields['decision'],
				'dateDecided' => $this->datetimeFromDB($result->fields['date_decided'])
			);
			$result->MoveNext();
		}
		$result->Close();
		return $decisions;
	}

	/**
	 * Transfer the decisions for an editor.
	 * @param $oldUserId int
	 * @param $newUserId int
	 */
	function transferEditorDecisions($oldUserId, $newUserId) {
		$this->update(
			'UPDATE edit_decisions SET editor_id = ? WHERE editor_id = ?',
			array((int) $newUserId, (int) $oldUserId)
		);
	}

	/**
	 * Find any still valid pending revisions decision for the passed
	 * submission id. A valid decision is one that is not overriden by any
	 * other decision.
	 * @param $submissionId int
	 * @param $expectedStageId int
	 * @return mixed array or null
	 */
	function findValidPendingRevisionsDecision($submissionId, $expectedStageId) {
		$editDecisionDao = DAORegistry::getDAO('EditDecisionDAO');
		$editorDecisions = $editDecisionDao->getEditorDecisions($submissionId);
		$workingDecisions = array_reverse($editorDecisions);
		$postReviewDecisions = array(SUBMISSION_EDITOR_DECISION_SEND_TO_PRODUCTION);
		$pendingRevisionDecision = null;

		foreach ($workingDecisions as $decision) {
			if (in_array($decision['decision'], $postReviewDecisions)) {
				// Decisions at later stages do not override the pending revisions one.
				continue;
			} elseif ($decision['decision'] == SUBMISSION_EDITOR_DECISION_PENDING_REVISIONS) {
				if ($decision['stageId'] == $expectedStageId) {
					$pendingRevisionDecision = $decision;
					// Only the last pending revisions decision is relevant.
					break;
				} else {
					// Both internal and external pending revisions decisions are
					// valid at the same time. Continue to search.
					continue;
				}

			} else {
				break;
			}
		}

		return $pendingRevisionDecision;
	}

	/**
	 * Find any file upload that's a revision and can be considered as
	 * a pending revisions decision response.
	 * @param $decision array
	 * @param $submissionId int
	 * @return boolean
	 */
	function responseExists($decision, $submissionId) {
		$stageId = $decision['stageId'];
		$round = $decision['round'];
		$sentRevisions = false;

		$reviewRoundDao = DAORegistry::getDAO('ReviewRoundDAO');
		$reviewRound = $reviewRoundDao->getReviewRound($submissionId, $stageId, $round);

		$submissionFileDao = DAORegistry::getDAO('SubmissionFileDAO');
		import('lib.pkp.classes.submission.SubmissionFile'); // Bring the file constants.
		$submissionFiles =  $submissionFileDao->getRevisionsByReviewRound($reviewRound, SUBMISSION_FILE_REVIEW_REVISION);

		if (is_array($submissionFiles)) {
			foreach ($submissionFiles as $file) {
				if ($file->getDateUploaded() > $decision['dateDecided']) {
					$sentRevisions = true;
					break;
				}
			}
		}

		return $sentRevisions;
	}
}

?>
