/mod/poasassignment/mod_form.php

<?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/>.


/**
 * The main poasassignment configuration form
 *
 * It uses the standard core Moodle formslib. For more info about them, please
 * visit: http://docs.moodle.org/en/Development:lib/formslib.php
 *
 * @package   mod_poasassignment
 * @copyright 2010 Your Name
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();
require_once($CFG->dirroot.'/course/lib.php');
require_once($CFG->dirroot.'/course/moodleform_mod.php');
class mod_poasassignment_mod_form extends moodleform_mod {

    function definition() {

        global $COURSE, $CFG;
        $mform =& $this->_form;
        //echo $this->_instance;
//-------------------------------------------------------------------------------
    /// Adding the "general" fieldset, where all the common settings are showed
        $mform->addElement('header', 'general', get_string('general', 'form'));

    /// Adding the standard "name" field
        $mform->addElement('text', 'name', get_string('poasassignmentname', 'poasassignment'), array('size'=>'64'));
        if (!empty($CFG->formatstringstriptags)) {
            $mform->setType('name', PARAM_TEXT);
        } else {
            $mform->setType('name', PARAM_CLEAN);
        }
        $mform->addRule('name', null, 'required', null, 'client');
        $mform->addRule('name', get_string('maximumchars', '', 255), 'maxlength', 255, 'client');

    /// Adding the standard "intro" and "introformat" fields
        $this->add_intro_editor(true, get_string('poasassignmentintro', 'poasassignment'));

        $mform->addElement('filemanager','poasassignmentfiles',get_string('poasassignmentfiles','poasassignment')/* ,null,$filemanager_options */);


        $mform->addElement('date_time_selector','availabledate',get_string('availabledate', 'poasassignment'),array('optional'=>true));
        $mform->setDefault('availabledate', time());

        $mform->addElement('date_time_selector','choicedate',get_string('choicedate', 'poasassignment'),array('optional'=>true));
        $mform->setDefault('choicedate', time()+2*24*3600);
        $mform->disabledIf('choicedate','activateindividualtasks');

        $ynoptions = array( 0 => get_string('no'), 1 => get_string('yes'));

        $mform->addElement('checkbox','preventlatechoice', get_string('preventlatechoice','poasassignment'));
        //$mform->setDefault('preventlatechoice', $default_values['preventlatechoice']);
        //$mform->addElement('static','elem',$flags);

        $mform->addElement('checkbox','randomtasksafterchoicedate', get_string('randomtasksafterchoicedate','poasassignment'));

        $mform->addElement('date_time_selector','deadline',get_string('deadline', 'poasassignment'),array('optional'=>true));
        $mform->setDefault('deadline', time()+7*24*3600);




        $mform->addElement('checkbox','preventlate', get_string('preventlate','poasassignment'));
        //$answer = new answer;
        //$answer->show_options($mform);
//------------------------------------------------------------------------------------
        /// Adding answers block
        global $COURSE, $CFG,$DB;
        $mform->addElement('header', 'answers', get_string('answers', 'poasassignment'));
        
        $mform->addElement('checkbox','severalattempts', get_string('severalattempts','poasassignment'));
        $mform->addHelpButton('severalattempts', 'severalattempts', 'poasassignment');
        
        $mform->addElement('checkbox','newattemptbeforegrade', get_string('newattemptbeforegrade','poasassignment'));
        $mform->addHelpButton('newattemptbeforegrade', 'newattemptbeforegrade', 'poasassignment');
        
        $mform->addElement('text','penalty', get_string('penalty','poasassignment'));
        $mform->addHelpButton('penalty', 'penalty', 'poasassignment');
        $mform->setDefault('penalty',0);
        $mform->disabledIf('penalty','severalattempts','notchecked');
        
        $mform->addElement('checkbox','notifyteachers', get_string('notifyteachers','poasassignment'));
        $mform->addHelpButton('notifyteachers', 'severalattempts', 'poasassignment');
        
        $mform->addElement('checkbox','notifystudents', get_string('notifystudents','poasassignment'));
        $mform->addHelpButton('notifystudents', 'notifystudents', 'poasassignment');
        
        $plugins=$DB->get_records('poasassignment_plugins');
        foreach($plugins as $plugin) {
            require_once($plugin->path);
            $poasassignmentplugin = new $plugin->name();
            $poasassignmentplugin->insert_plugin_in_db();
            $poasassignmentplugin->show_settings($mform,$this->_instance);
        }
//------------------------------------------------------------------------------------
    /// Adding individual tasks block
        $mform->addElement('header', 'poasassignmentfieldset', get_string('poasassignmentfieldset', 'poasassignment'));
        $mform->addElement('checkbox','activateindividualtasks', get_string('activateindividualtasks','poasassignment'));
        $mform->addElement('select','howtochoosetask',get_string('howtochoosetask','poasassignment'),array(
                get_string('randomtask','poasassignment'),
                get_string('parameterchoice','poasassignment'),
                get_string('studentchoice','poasassignment')));
        $mform->disabledIf('howtochoosetask','activateindividualtasks');

        $mform->addElement('checkbox','secondchoice', get_string('secondchoice','poasassignment'));
        $mform->disabledIf('secondchoice','activateindividualtasks');

        $mform->addElement('select','uniqueness',get_string('uniqueness','poasassignment'),array(
                get_string('nouniqueness','poasassignment'),
                get_string('uniquewithingroup','poasassignment'),
                get_string('uniquewithincourse','poasassignment')));
        $mform->disabledIf('uniqueness','activateindividualtasks');
        
        $mform->addElement('checkbox','teacherapproval', get_string('teacherapproval','poasassignment'));
        $mform->disabledIf('teacherapproval','activateindividualtasks');

//-------------------------------------------------------------------------------
        // add standard elements, common to all modules
        $this->standard_coursemodule_elements();
//-------------------------------------------------------------------------------
        // add standard buttons, common to all modules
        $this->add_action_buttons();

    }
    function data_preprocessing(&$default_values){
        if (isset($default_values['flags'])){
            $flags = (int)$default_values['flags'];
            unset($default_values['flags']);
            $default_values['preventlatechoice']=$flags & PREVENT_LATE_CHOICE;
            $default_values['randomtasksafterchoicedate']=$flags & RANDOM_TASKS_AFTER_CHOICEDATE;
            $default_values['preventlate']=$flags & PREVENT_LATE;
            $default_values['severalattempts']=$flags & SEVERAL_ATTEMPTS;
            $default_values['notifyteachers']=$flags & NOTIFY_TEACHERS;
            $default_values['notifystudents']=$flags & NOTIFY_STUDENTS;
            $default_values['activateindividualtasks']=$flags & ACTIVATE_INDIVIDUAL_TASKS;
            $default_values['secondchoice']=$flags & SECOND_CHOICE;
            $default_values['teacherapproval']=$flags & TEACHER_APPROVAL;
            $default_values['newattemptbeforegrade']=$flags & ALL_ATTEMPTS_AS_ONE;
        }
        if ($this->current->instance) {
            $draftitemid = file_get_submitted_draft_itemid('poasassignmentfiles');
            //echo $this->context->id;
            file_prepare_draft_area($draftitemid, $this->context->id, 'mod_poasassignment', 'poasassignmentfiles', 0, array('subdirs'=>true));
            $default_values['poasassignmentfiles'] = $draftitemid;
        }
    }
    function validation($data, $files) {
        $errors = parent::validation($data, $files);
        
        // Check open and close times are consistent.
        if ($data['availabledate'] != 0 && $data['choicedate'] != 0 && $data['choicedate'] < $data['availabledate']) {
            $errors['choicedate'] = get_string('choicebeforeopen', 'poasassignment');
        }
        if ($data['availabledate'] != 0 && $data['deadline'] != 0 && $data['deadline'] < $data['availabledate']) {
            $errors['deadline'] = get_string('deadlinebeforeopen', 'poasassignment');
        }
        if ($data['choicedate'] != 0 && $data['deadline'] != 0 && $data['deadline'] < $data['choicedate']) {
            $errors['deadline'] = get_string('deadlinebeforechoice', 'poasassignment');
        }
        if (count($errors) == 0) {
            return true;
        } else {
            return $errors;
        }
        
        
    }
}