<?php

/**
 * @file controllers/grid/files/SubmissionFilesGridHandler.inc.php
 *
 * Copyright (c) 2014-2021 Simon Fraser University
 * Copyright (c) 2003-2021 John Willinsky
 * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
 *
 * @class SubmissionFilesGridHandler
 * @ingroup controllers_grid_files
 *
 * @brief Handle submission file grid requests.
 */

// Import UI base classes.
import('lib.pkp.classes.controllers.grid.GridHandler');

// Import submission files grid specific classes.
import('lib.pkp.controllers.grid.files.SubmissionFilesGridRow');
import('lib.pkp.controllers.grid.files.FileNameGridColumn');
import('lib.pkp.controllers.grid.files.FileDateGridColumn');

// Import submission file class which contains the SUBMISSION_FILE_* constants.
import('lib.pkp.classes.submission.SubmissionFile');

// Import the class that defines file grids capabilities.
import('lib.pkp.classes.controllers.grid.files.FilesGridCapabilities');

class SubmissionFilesGridHandler extends GridHandler {

	/** @var FilesGridCapabilities */
	var $_capabilities;

	/** @var integer */
	var $_stageId;

	/**
	 * Constructor
	 * @param $dataProvider GridDataProvider
	 * @param $stageId integer One of the WORKFLOW_STAGE_ID_* constants.
	 * @param $capabilities integer A bit map with zero or more
	 *  FILE_GRID_* capabilities set.
	 */
	function __construct($dataProvider, $stageId, $capabilities = 0) {
		parent::__construct($dataProvider);

		if ($stageId) {
			$this->_stageId = (int)$stageId;
		}
		$this->_capabilities = new FilesGridCapabilities($capabilities);
	}


	//
	// Getters and Setters
	//
	/**
	 * Get grid capabilities object.
	 * @return FilesGridCapabilities
	 */
	function getCapabilities() {
		return $this->_capabilities;
	}

	/**
	 * Set grid capabilities object.
	 * @param $capabilities FilesGridCapabilities
	 */
	function setCapabilities($capabilities) {
		$this->_capabilities = $capabilities;
	}

	/**
	 * Get the workflow stage id.
	 * @return integer
	 */
	function getStageId() {
		return $this->_stageId;
	}

	/**
	 * Get the authorized submission.
	 * @return Submission
	 */
	function getSubmission() {
		// We assume proper authentication by the data provider.
		$submission = $this->getAuthorizedContextObject(ASSOC_TYPE_SUBMISSION);
		assert(is_a($submission, 'Submission'));
		return $submission;
	}


	//
	// Implement template methods from PKPHandler
	//
	/**
	 * @copydoc PKPHandler::authorize()
	 */
	function authorize($request, &$args, $roleAssignments) {
		// Set the stage id from the request parameter if not set previously.
		if (!$this->getStageId()) {
			$stageId = (int) $request->getUserVar('stageId');
			// This will be validated with the authorization policy added by
			// the grid data provider.
			$this->_stageId = $stageId;
		}

		$dataProvider = $this->getDataProvider();
		$dataProvider->setStageId($this->getStageId());

		return parent::authorize($request, $args, $roleAssignments);
	}

	/**
	 * @copydoc GridHandler::initialize()
	 */
	function initialize($request, $args = null) {
		parent::initialize($request, $args);

		// Load translations.
		AppLocale::requireComponents(
			LOCALE_COMPONENT_APP_SUBMISSION,
			LOCALE_COMPONENT_PKP_SUBMISSION,
			LOCALE_COMPONENT_APP_EDITOR,
			LOCALE_COMPONENT_PKP_EDITOR,
			LOCALE_COMPONENT_PKP_COMMON,
			LOCALE_COMPONENT_APP_COMMON
		);

		// Add grid actions
		$capabilities = $this->getCapabilities();
		$dataProvider = $this->getDataProvider();

		$submission = $this->getSubmission();

		if($capabilities->canAdd()) {
			assert(isset($dataProvider));
			$this->addAction($dataProvider->getAddFileAction($request));
		}

		// Test whether an archive tool is available for the export to work, if so, add 'download all' grid action
		if ($capabilities->canDownloadAll() && $this->hasGridDataElements($request)) {
			$stageId = $this->getStageId();
			$linkParams = [
				'nameLocaleKey' => $this->getTitle(),
				'fileStage' => $this->getDataProvider()->getFileStage(),
				'submissionId' => $submission->getId(),
				'stageId' => $stageId,
			];
			$files = $this->getFilesToDownload($request);

			$this->addAction($capabilities->getDownloadAllAction($request, $files, $linkParams), GRID_ACTION_POSITION_BELOW);
		}

		// The file name column is common to all file grid types.
		$this->addColumn(new FileNameGridColumn($capabilities->canViewNotes(), $this->getStageId()));

		// Additional column with file upload date/creation date
		$this->addColumn(new FileDateGridColumn($capabilities->canViewNotes()));

		// Set the no items row text
		$this->setEmptyRowText('grid.noFiles');
	}

	/**
	 * @copyDoc GridHandler::getFilterForm()
	 */
	protected function getFilterForm() {
		return 'controllers/grid/files/filesGridFilter.tpl';
	}

	/**
	 * @copyDoc GridHandler::renderFilter()
	 */
	function renderFilter($request, $filterData = array()) {
		return parent::renderFilter(
			$request,
			array(
				'columns' => $this->getFilterColumns(),
				'gridId' => $this->getId()
			)
		);
	}

	/**
	 * @copyDoc GridHandler::getFilterSelectionData()
	 */
	function getFilterSelectionData($request) {
		return array(
			'search' => (string) $request->getUserVar('search'),
			'column' => (string) $request->getUserVar('column'),
		);
	}

	/**
	 * Get which columns can be used by users to filter data.
	 * @return Array
	 */
	protected function getFilterColumns() {
		return array(
			'name' => __('common.name'),
		);
	}


	//
	// Overridden methods from GridHandler
	//
	/**
	 * @copydoc GridHandler::getRowInstance()
	 */
	protected function getRowInstance() {
		return new SubmissionFilesGridRow($this->getCapabilities(), $this->getStageId());
	}


	//
	// Protected methods.
	//
	function getFilesToDownload($request) {
		return $this->getGridDataElements($request);
	}
}