<?php

// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Resource configuration form
 *
 * @package    mod
 * @subpackage resource
 * @copyright  2009 Petr Skoda  {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die;

require_once($CFG->dirroot.'/course/moodleform_mod.php');
require_once($CFG->dirroot.'/mod/resource/locallib.php');
require_once($CFG->libdir.'/filelib.php');

class mod_resource_mod_form extends moodleform_mod {
    function definition() {
        global $CFG, $DB;
        $mform =& $this->_form;

        $config = get_config('resource');

        if ($this->current->instance and $this->current->tobemigrated) {
            // resource not migrated yet
            $resoruce_old = $DB->get_record('resource_old', array('oldid'=>$this->current->instance));
            $mform->addElement('static', 'warning', '', get_string('notmigrated', 'resource', $resoruce_old->type));
            $mform->addElement('cancel');
            $this->standard_hidden_coursemodule_elements();
            return;
        }

        //-------------------------------------------------------
        $mform->addElement('header', 'general', get_string('general', 'form'));
        $mform->addElement('text', 'name', get_string('name'), array('size'=>'48'));
        if (!empty($CFG->formatstringstriptags)) {
            $mform->setType('name', PARAM_TEXT);
        } else {
            $mform->setType('name', PARAM_CLEANHTML);
        }
        $mform->addRule('name', null, 'required', null, 'client');
        $this->add_intro_editor($config->requiremodintro);

        //-------------------------------------------------------
        $mform->addElement('header', 'contentsection', get_string('contentheader', 'resource'));

        $filemanager_options = array();
        // 3 == FILE_EXTERNAL & FILE_INTERNAL
        // These two constant names are defined in repository/lib.php
        $filemanager_options['return_types'] = 3;
        $filemanager_options['accepted_types'] = '*';
        $filemanager_options['maxbytes'] = 0;
        $filemanager_options['maxfiles'] = -1;
        $filemanager_options['mainfile'] = true;

        $mform->addElement('filemanager', 'files', get_string('selectfiles'), null, $filemanager_options);

        //-------------------------------------------------------
        $mform->addElement('header', 'optionssection', get_string('optionsheader', 'resource'));

        if ($this->current->instance) {
            $options = resourcelib_get_displayoptions(explode(',', $config->displayoptions), $this->current->display);
        } else {
            $options = resourcelib_get_displayoptions(explode(',', $config->displayoptions));
        }

        if (count($options) == 1) {
            $mform->addElement('hidden', 'display');
            $mform->setType('display', PARAM_INT);
            reset($options);
            $mform->setDefault('display', key($options));
        } else {
            $mform->addElement('select', 'display', get_string('displayselect', 'resource'), $options);
            $mform->setDefault('display', $config->display);
            $mform->setAdvanced('display', $config->display_adv);
            $mform->addHelpButton('display', 'displayselect', 'resource');
        }

        if (array_key_exists(RESOURCELIB_DISPLAY_POPUP, $options)) {
            $mform->addElement('text', 'popupwidth', get_string('popupwidth', 'resource'), array('size'=>3));
            if (count($options) > 1) {
                $mform->disabledIf('popupwidth', 'display', 'noteq', RESOURCELIB_DISPLAY_POPUP);
            }
            $mform->setType('popupwidth', PARAM_INT);
            $mform->setDefault('popupwidth', $config->popupwidth);
            $mform->setAdvanced('popupwidth', $config->popupwidth_adv);

            $mform->addElement('text', 'popupheight', get_string('popupheight', 'resource'), array('size'=>3));
            if (count($options) > 1) {
                $mform->disabledIf('popupheight', 'display', 'noteq', RESOURCELIB_DISPLAY_POPUP);
            }
            $mform->setType('popupheight', PARAM_INT);
            $mform->setDefault('popupheight', $config->popupheight);
            $mform->setAdvanced('popupheight', $config->popupheight_adv);
        }

        if (array_key_exists(RESOURCELIB_DISPLAY_AUTO, $options) or
          array_key_exists(RESOURCELIB_DISPLAY_EMBED, $options) or
          array_key_exists(RESOURCELIB_DISPLAY_FRAME, $options)) {
            $mform->addElement('checkbox', 'printheading', get_string('printheading', 'resource'));
            $mform->disabledIf('printheading', 'display', 'eq', RESOURCELIB_DISPLAY_POPUP);
            $mform->disabledIf('printheading', 'display', 'eq', RESOURCELIB_DISPLAY_DOWNLOAD);
            $mform->disabledIf('printheading', 'display', 'eq', RESOURCELIB_DISPLAY_OPEN);
            $mform->disabledIf('printheading', 'display', 'eq', RESOURCELIB_DISPLAY_NEW);
            $mform->setDefault('printheading', $config->printheading);
            $mform->setAdvanced('printheading', $config->printheading_adv);

            $mform->addElement('checkbox', 'printintro', get_string('printintro', 'resource'));
            $mform->disabledIf('printintro', 'display', 'eq', RESOURCELIB_DISPLAY_POPUP);
            $mform->disabledIf('printintro', 'display', 'eq', RESOURCELIB_DISPLAY_DOWNLOAD);
            $mform->disabledIf('printintro', 'display', 'eq', RESOURCELIB_DISPLAY_OPEN);
            $mform->disabledIf('printintro', 'display', 'eq', RESOURCELIB_DISPLAY_NEW);
            $mform->setDefault('printintro', $config->printintro);
            $mform->setAdvanced('printintro', $config->printintro_adv);
        }

        $options = array('0' => get_string('none'), '1' => get_string('allfiles'), '2' => get_string('htmlfilesonly'));
        $mform->addElement('select', 'filterfiles', get_string('filterfiles', 'resource'), $options);
        $mform->setDefault('filterfiles', $config->filterfiles);
        $mform->setAdvanced('filterfiles', $config->filterfiles_adv);

        // add legacy files flag only if used
        if (isset($this->current->legacyfiles) and $this->current->legacyfiles != RESOURCELIB_LEGACYFILES_NO) {
            $options = array(RESOURCELIB_LEGACYFILES_DONE   => get_string('legacyfilesdone', 'resource'),
                             RESOURCELIB_LEGACYFILES_ACTIVE => get_string('legacyfilesactive', 'resource'));
            $mform->addElement('select', 'legacyfiles', get_string('legacyfiles', 'resource'), $options);
            $mform->setAdvanced('legacyfiles', 1);
        }

        //-------------------------------------------------------
        $this->standard_coursemodule_elements();

        //-------------------------------------------------------
        $this->add_action_buttons();

        //-------------------------------------------------------
        $mform->addElement('hidden', 'revision');
        $mform->setType('revision', PARAM_INT);
        $mform->setDefault('revision', 1);
    }

    function data_preprocessing(&$default_values) {
        if ($this->current->instance and !$this->current->tobemigrated) {
            $draftitemid = file_get_submitted_draft_itemid('files');
            file_prepare_draft_area($draftitemid, $this->context->id, 'mod_resource', 'content', 0, array('subdirs'=>true));
            $default_values['files'] = $draftitemid;
        }
        if (!empty($default_values['displayoptions'])) {
            $displayoptions = unserialize($default_values['displayoptions']);
            if (isset($displayoptions['printintro'])) {
                $default_values['printintro'] = $displayoptions['printintro'];
            }
            if (isset($displayoptions['printheading'])) {
                $default_values['printheading'] = $displayoptions['printheading'];
            }
            if (!empty($displayoptions['popupwidth'])) {
                $default_values['popupwidth'] = $displayoptions['popupwidth'];
            }
            if (!empty($displayoptions['popupheight'])) {
                $default_values['popupheight'] = $displayoptions['popupheight'];
            }
        }
    }

    function definition_after_data() {
        if ($this->current->instance and $this->current->tobemigrated) {
            // resource not migrated yet
            return;
        }

        parent::definition_after_data();
    }

    function validation($data, $files) {
        global $USER;

        $errors = parent::validation($data, $files);

        $usercontext = get_context_instance(CONTEXT_USER, $USER->id);
        $fs = get_file_storage();
        if (!$files = $fs->get_area_files($usercontext->id, 'user', 'draft', $data['files'], 'sortorder, id', false)) {
            $errors['files'] = get_string('required');
            return $errors;
        }
        if (count($files) == 1) {
            // no need to select main file if only one picked
            return $errors;
        } else if(count($files) > 1) {
            $mainfile = false;
            foreach($files as $file) {
                if ($file->get_sortorder() == 1) {
                    $mainfile = true;
                    break;
                }
            }
            // set a default main file
            if (!$mainfile) {
                $file = reset($files);
                file_set_sortorder($file->get_contextid(), $file->get_component(), $file->get_filearea(), $file->get_itemid(),
                                   $file->get_filepath(), $file->get_filename(), 1);
            }
        }
        return $errors;
    }
}
