<?php
/* For licensing terms, see /license.txt */

/**
 * 	@package chamilo.survey
 * 	@author Patrick Cool <patrick.cool@UGent.be>, Ghent University: cleanup, refactoring and rewriting large parts of the code
 * 	@version $Id: survey.php 22573 2009-08-03 03:38:13Z yannoo $
 *
 * 	@todo use quickforms for the forms
 */
// Language file that needs to be included
$language_file = 'survey';

// Including the global initialization file
require_once '../inc/global.inc.php';

$this_section = SECTION_COURSES;
$current_course_tool = TOOL_SURVEY;

api_protect_course_script(true);

// Including additional libraries
require_once 'survey.lib.php';

/** @todo this has to be moved to a more appropriate place (after the display_header of the code) */
// Coach can't view this page
$extend_rights_for_coachs = api_get_setting('extend_rights_for_coach_on_survey');
if (!api_is_allowed_to_edit(false, true) || (api_is_course_coach() && $extend_rights_for_coachs == 'false')) {
    Display :: display_header(get_lang('ToolSurvey'));
    Display :: display_error_message(get_lang('NotAllowed'), false);
    Display :: display_footer();
    exit;
}

// Database table definitions
$table_survey = Database :: get_course_table(TABLE_SURVEY);
$table_survey_question = Database :: get_course_table(TABLE_SURVEY_QUESTION);
$table_survey_question_option = Database :: get_course_table(TABLE_SURVEY_QUESTION_OPTION);
$table_survey_question_group = Database :: get_course_table(TABLE_SURVEY_QUESTION_GROUP);
$table_course = Database :: get_main_table(TABLE_MAIN_COURSE);
$table_user = Database :: get_main_table(TABLE_MAIN_USER);

$survey_id = intval($_GET['survey_id']);
$course_id = api_get_course_int_id();
$action = isset($_GET['action']) ? $_GET['action'] : null;

// Breadcrumbs
$interbreadcrumb[] = array('url' => 'survey_list.php', 'name' => get_lang('SurveyList'));

// Getting the survey information
if (isset($_GET['survey_id'])) {
    $course_code = api_get_course_id();
    if ($course_code != -1) {
        $survey_data = survey_manager::get_survey($survey_id);
    } else {
        Display :: display_header(get_lang('ToolSurvey'));
        Display :: display_error_message(get_lang('NotAllowed'), false);
        Display :: display_footer();
        exit;
    }
}

$tool_name = strip_tags($survey_data['title']);

$is_survey_type_1 = $survey_data['survey_type'] == 1;

if (api_strlen(strip_tags($survey_data['title'])) > 40) {
    $tool_name .= '...';
}


if ($is_survey_type_1 && $action == 'addgroup' || $action == 'deletegroup') {
    $_POST['name'] = trim($_POST['name']);

    if ($action == 'addgroup') {
        if (!empty($_POST['group_id'])) {
            Database::query('UPDATE '.$table_survey_question_group.' SET description = \''.Database::escape_string($_POST['description']).'\'
			                 WHERE c_id = '.$course_id.' AND id = \''.Database::escape_string($_POST['group_id']).'\'');
            $sendmsg = 'GroupUpdatedSuccessfully';
        } elseif (!empty($_POST['name'])) {
            Database::query('INSERT INTO '.$table_survey_question_group.' (c_id, name,description,survey_id) values ('.$course_id.', \''.Database::escape_string($_POST['name']).'\',\''.Database::escape_string($_POST['description']).'\',\''.Database::escape_string($survey_id).'\') ');
            $sendmsg = 'GroupCreatedSuccessfully';
        } else {
            $sendmsg = 'GroupNeedName';
        }
    }

    if ($action == 'deletegroup') {
        Database::query('DELETE FROM '.$table_survey_question_group.' WHERE c_id = '.$course_id.' AND id = '.Database::escape_string($_GET['gid']).' and survey_id = '.Database::escape_string($survey_id));
        $sendmsg = 'GroupDeletedSuccessfully';
    }
    header('Location:survey.php?survey_id='.$survey_id.'&sendmsg='.$sendmsg);
    exit;
}

// Displaying the header

Display::display_header($tool_name, 'Survey');

// Action handling
$my_action_survey = Security::remove_XSS($action);
$my_question_id_survey = Security::remove_XSS($_GET['question_id']);
$my_survey_id_survey = Security::remove_XSS($_GET['survey_id']);
$message_information = Security::remove_XSS($_GET['message']);

if (isset($action)) {
    if (($action == 'moveup' || $action == 'movedown') && isset($_GET['question_id'])) {
        survey_manager::move_survey_question($my_action_survey, $my_question_id_survey, $my_survey_id_survey);
        Display::display_confirmation_message(get_lang('SurveyQuestionMoved'));
    }
    if ($action == 'delete' AND is_numeric($_GET['question_id'])) {
        survey_manager::delete_survey_question($my_survey_id_survey, $my_question_id_survey, $survey_data['is_shared']);
    }
}
if (isset($_GET['message'])) {
    // We have created the survey or updated the survey
    if (in_array($_GET['message'], array('SurveyUpdatedSuccesfully', 'SurveyCreatedSuccesfully'))) {
        Display::display_confirmation_message(get_lang($message_information).', '.PHP_EOL.api_strtolower(get_lang('YouCanNowAddQuestionToYourSurvey')));
    }
    // We have added a question
    if (in_array($_GET['message'], array('QuestionAdded', 'QuestionUpdated'))) {
        Display::display_confirmation_message(get_lang($message_information));
    }

    if (in_array($_GET['message'], array('YouNeedToCreateGroups'))) {
        Display::display_warning_message(get_lang($message_information), false);
    }
}

if (!empty($survey_data['survey_version']))
    echo '<b>'.get_lang('Version').': '.$survey_data['survey_version'].'</b>';

// We exit here is the first or last question is a pagebreak (which causes errors)
SurveyUtil::check_first_last_question($_GET['survey_id']);

// Action links
$survey_actions = '<a href="create_new_survey.php?'.api_get_cidreq().'&amp;action=edit&amp;survey_id='.$survey_id.'">'.Display::return_icon('edit.png', get_lang('EditSurvey'), '', ICON_SIZE_MEDIUM).'</a>';
$survey_actions .= '<a href="survey_list.php?'.api_get_cidreq().'&amp;action=delete&amp;survey_id='.$survey_id.'" onclick="javascript:if(!confirm(\''.addslashes(api_htmlentities(get_lang('DeleteSurvey').'?', ENT_QUOTES)).'\')) return false;">'.Display::return_icon('delete.png', get_lang('DeleteSurvey'), '', ICON_SIZE_MEDIUM).'</a>';
//$survey_actions .= '<a href="create_survey_in_another_language.php?id_survey='.$survey_id.'">'.Display::return_icon('copy.gif', get_lang('Copy')).'</a>';
$survey_actions .= '<a href="preview.php?'.api_get_cidreq().'&amp;survey_id='.$survey_id.'">'.Display::return_icon('preview_view.png', get_lang('Preview'), '', ICON_SIZE_MEDIUM).'</a>';
$survey_actions .= '<a href="survey_invite.php?'.api_get_cidreq().'&amp;survey_id='.$survey_id.'">'.Display::return_icon('mail_send.png', get_lang('Publish'), '', ICON_SIZE_MEDIUM).'</a>';
$survey_actions .= '<a href="reporting.php?'.api_get_cidreq().'&amp;survey_id='.$survey_id.'">'.Display::return_icon('stats.png', get_lang('Reporting'), '', ICON_SIZE_MEDIUM).'</a>';
echo '<div class="actions">'.$survey_actions.'</div>';

if ($survey_data['survey_type'] == 0) {
    echo '<div class="actionsbig">';
    echo '<a style="padding-left:0px;" href="question.php?'.api_get_cidreq().'&amp;action=add&type=yesno&amp;survey_id='.$survey_id.'">'.Display::return_icon('yesno.gif', get_lang('YesNo')).'</a>';
    echo '<a href="question.php?'.api_get_cidreq().'&amp;action=add&type=multiplechoice&amp;survey_id='.$survey_id.'">'.Display::return_icon('mcua.gif', get_lang('UniqueSelect')).'<br /></a>';
    echo '<a href="question.php?'.api_get_cidreq().'&amp;action=add&type=multipleresponse&amp;survey_id='.$survey_id.'">'.Display::return_icon('mcma.gif', get_lang('MultipleResponse')).'</a>';
    echo '<a href="question.php?'.api_get_cidreq().'&amp;action=add&type=open&amp;survey_id='.$survey_id.'">'.Display::return_icon('open_answer.gif', get_lang('Open')).'<br /></a>';
    echo '<a href="question.php?'.api_get_cidreq().'&amp;action=add&type=dropdown&amp;survey_id='.$survey_id.'">'.Display::return_icon('dropdown.gif', get_lang('Dropdown')).'<br /></a>';
    echo '<a href="question.php?'.api_get_cidreq().'&amp;action=add&type=percentage&amp;survey_id='.$survey_id.'">'.Display::return_icon('percentagequestion.gif', get_lang('Percentage')).'<br /></a>';
    echo '<a href="question.php?'.api_get_cidreq().'&amp;action=add&type=score&amp;survey_id='.$survey_id.'">'.Display::return_icon('scorequestion.gif', get_lang('Score')).'</a>';
    echo '<a href="question.php?'.api_get_cidreq().'&amp;action=add&type=comment&amp;survey_id='.$survey_id.'">'.Display::return_icon('commentquestion.gif', get_lang('Comment')).'</a>';
    echo '<a href="question.php?'.api_get_cidreq().'&amp;action=add&type=pagebreak&amp;survey_id='.$survey_id.'">'.Display::return_icon('page_end.gif', get_lang('Pagebreak')).'</a>';
    echo '</div>';
} else {
    echo '<div class="actionsbig">';
    //echo '<a href="group.php?'.api_get_cidreq().'&amp;action=add&amp;survey_id='.$survey_id.'"><img src="../img/yesno.gif" /><br />'.get_lang('Add groups').'</a></div>';
    echo '<a style="padding-left:0px;" href="question.php?'.api_get_cidreq().'&amp;action=add&type=personality&amp;survey_id='.$survey_id.'"><img src="../img/yesno.gif" /></a></div>';
    echo '</div>';
}

// Displaying the table header with all the questions
echo '<table class="data_table">';
echo '	<tr class="row_odd">';
echo '		<th width="15">'.get_lang('QuestionNumber').'</th>';
echo '		<th>'.get_lang('Title').'</th>';
echo '		<th>'.get_lang('Type').'</th>';
echo '		<th width="50" >'.get_lang('NumberOfOptions').'</th>';
echo '		<th width="100">'.get_lang('Modify').'</th>';
if ($is_survey_type_1) {
    echo '<th width="100">'.get_lang('Condition').'</th>';
    echo '<th width="40">'.get_lang('Group').'</th>';
}
echo '	</tr>';

// Displaying the table contents with all the questions
$question_counter = 1;
$sql = "SELECT * FROM $table_survey_question_group WHERE c_id = '.$course_id.' AND survey_id = '".Database::escape_string($survey_id)."' ORDER BY id";
$result = Database::query($sql);
$groups = array();
while ($row = Database::fetch_array($result)) {
    $groups[$row['id']] = $row['name'];
}
$sql = "SELECT survey_question.*, count(survey_question_option.question_option_id) as number_of_options
			FROM $table_survey_question survey_question
			LEFT JOIN $table_survey_question_option survey_question_option
			ON survey_question.question_id = survey_question_option.question_id AND survey_question_option.c_id = $course_id
			WHERE    survey_question.survey_id 	= '".Database::escape_string($survey_id)."' AND
			         survey_question.c_id 		= $course_id
			GROUP BY survey_question.question_id
			ORDER BY survey_question.sort ASC";

$result = Database::query($sql);
$question_counter_max = Database::num_rows($result);
while ($row = Database::fetch_array($result, 'ASSOC')) {
    echo '<tr>';
    echo '	<td>'.$question_counter.'</td>';
    echo '	<td>';
    if (api_strlen($row['survey_question']) > 100) {
        echo api_substr(strip_tags($row['survey_question']), 0, 100).' ... ';
    } else {
        echo $row['survey_question'];
    }

    if ($row['type'] == 'yesno') {
        $tool_name = get_lang('YesNo');
    } else if ($row['type'] == 'multiplechoice') {
        $tool_name = get_lang('UniqueSelect');
    } else {
        $tool_name = get_lang(api_ucfirst(Security::remove_XSS($row['type'])));
    }

    echo '</td>';
    echo '	<td>'.$tool_name.'</td>';
    echo '	<td>'.$row['number_of_options'].'</td>';
    echo '	<td>';
    echo '		<a href="question.php?'.api_get_cidreq().'&amp;action=edit&amp;type='.$row['type'].'&amp;survey_id='.$survey_id.'&amp;question_id='.$row['question_id'].'">'.Display::return_icon('edit.png', get_lang('Edit'), '', ICON_SIZE_SMALL).'</a>';
    echo '		<a href="survey.php?'.api_get_cidreq().'&amp;action=delete&amp;survey_id='.$survey_id.'&amp;question_id='.$row['question_id'].'" onclick="javascript:if(!confirm(\''.addslashes(api_htmlentities(get_lang("DeleteSurveyQuestion").'?', ENT_QUOTES, $charset)).'\')) return false;">'.Display::return_icon('delete.png', get_lang('Delete'), '', ICON_SIZE_SMALL).'</a>';
    if ($question_counter > 1) {
        echo '		<a href="survey.php?'.api_get_cidreq().'&amp;action=moveup&amp;survey_id='.$survey_id.'&amp;question_id='.$row['question_id'].'">'.Display::return_icon('up.png', get_lang('MoveUp'), '', ICON_SIZE_SMALL).'</a>';
    } else {
        Display::display_icon('up_na.png', '&nbsp;', '', ICON_SIZE_SMALL);
    }
    if ($question_counter < $question_counter_max) {
        echo '		<a href="survey.php?'.api_get_cidreq().'&amp;action=movedown&amp;survey_id='.$survey_id.'&amp;question_id='.$row['question_id'].'">'.Display::return_icon('down.png', get_lang('MoveDown'), '', ICON_SIZE_SMALL).'</a>';
    } else {
        Display::display_icon('down_na.png', '&nbsp;', '', ICON_SIZE_SMALL);
    }
    echo '	</td>';
    $question_counter++;

    if ($is_survey_type_1) {
        echo '<td>'.(($row['survey_group_pri'] == 0) ? get_lang('Secondary') : get_lang('Primary')).'</td>';
        echo '<td>'.(($row['survey_group_pri'] == 0) ? $groups[$row['survey_group_sec1']].'-'.$groups[$row['survey_group_sec2']] : $groups[$row['survey_group_pri']]).'</td>';
    }
    echo '</tr>';
}

echo '</table>';

if ($is_survey_type_1) {
    echo '<br /><br /><b>'.get_lang('ManageGroups').'</b><br /><br />';

    if (in_array($_GET['sendmsg'], array('GroupUpdatedSuccessfully', 'GroupDeletedSuccessfully', 'GroupCreatedSuccessfully'))) {
        echo Display::display_confirmation_message(get_lang($_GET['sendmsg']), false);
    }

    if (in_array($_GET['sendmsg'], array('GroupNeedName'))) {
        echo Display::display_warning_message(get_lang($_GET['sendmsg']), false);
    }

    echo '<table border="0"><tr><td width="100">'.get_lang('Name').'</td><td>'.get_lang('Description').'</td></tr></table>';

    echo '<form action="survey.php?action=addgroup&survey_id='.$survey_id.'" method="post">';
    if ($action == 'editgroup') {
        $sql = 'SELECT name,description FROM '.$table_survey_question_group.' WHERE id = '.Database::escape_string($_GET['gid']).' AND survey_id = '.Database::escape_string($survey_id).' limit 1';
        $rs = Database::query($sql);
        $editedrow = Database::fetch_array($rs, 'ASSOC');
        echo '<input type="text" maxlength="20" name="name" value="'.$editedrow['name'].'" size="10" disabled>';
        echo '<input type="text" maxlength="150" name="description" value="'.$editedrow['description'].'" size="40">';
        echo '<input type="hidden" name="group_id" value="'.Security::remove_XSS($_GET['gid']).'">';
        echo '<input type="submit" value="'.get_lang('Save').'"'.'<input type="button" value="'.get_lang('Cancel').'" onclick="window.location.href = \'survey.php?survey_id='.Security::remove_XSS($survey_id).'\';" />';
    } else {
        echo '<input type="text" maxlength="20" name="name" value="" size="10">';
        echo '<input type="text" maxlength="250" name="description" value="" size="80">';
        echo '<input type="submit" value="'.get_lang('Create').'"';
    }
    echo '</form><br />';

    echo '<table class="data_table">';
    echo '	<tr class="row_odd">';
    echo '		<th width="200">'.get_lang('Name').'</th>';
    echo '		<th>'.get_lang('Description').'</th>';
    echo '		<th width="100">'.get_lang('Modify').'</th>';
    echo '	</tr>';

    $sql = 'SELECT id,name,description FROM '.$table_survey_question_group.' WHERE c_id = '.$course_id.' AND survey_id = '.Database::escape_string($survey_id).' ORDER BY name';

    $rs = Database::query($sql);
    while ($row = Database::fetch_array($rs, ASSOC)) {
        $grouplist .= '<tr><td>'.$row['name'].'</td><td>'.$row['description'].'</td><td>'.
            '<a href="survey.php?survey_id='.$survey_id.'&gid='.$row['id'].'&action=editgroup">'.
            Display::return_icon('edit.png', get_lang('Edit'), '', ICON_SIZE_SMALL).'</a> '.
            '<a href="survey.php?survey_id='.$survey_id.'&gid='.$row['id'].'&action=deletegroup" onclick="javascript:if(!confirm(\''.addslashes(api_htmlentities(sprintf(get_lang('DeleteSurveyGroup'), $row['name']).'?', ENT_QUOTES)).'\')) return false;">'.
            Display::return_icon('delete.png', get_lang('Delete'), '', ICON_SIZE_SMALL).'</a>'.
            '</td></tr>';
    }
    echo $grouplist.'</table>';
}

// Footer
Display :: display_footer();