<?php // $Id: preset.php,v 1.24.2.3 2008/04/16 03:23:09 dongsheng Exp $
/* Preset Menu
 *
 * This is the page that is the menu item in the config database
 * pages.
 */

require_once('../../config.php');
require_once('lib.php');
require_once($CFG->libdir.'/uploadlib.php');
require_once($CFG->libdir.'/xmlize.php');

$id       = optional_param('id', 0, PARAM_INT);    // course module id
$d        = optional_param('d', 0, PARAM_INT);     // database activity id
$action   = optional_param('action', 'base', PARAM_ALPHANUM); // current action
$fullname = optional_param('fullname', '', PARAM_PATH); // directory the preset is in
$file     = optional_param('file', '', PARAM_PATH); // uploaded file

// find out preset owner userid and shortname
$parts = explode('/', $fullname);
$userid = empty($parts[0]) ? 0 : (int)$parts[0];
$shortname = empty($parts[1]) ? '' : $parts[1];
unset($parts);
unset($fullname);

if ($id) {
    if (! $cm = get_coursemodule_from_id('data', $id)) {
        error('Course Module ID was incorrect');
    }
    if (! $course = get_record('course', 'id', $cm->course)) {
        error('Course is misconfigured');
    }
    if (! $data = get_record('data', 'id', $cm->instance)) {
        error('Module Incorrect');
    }
} else if ($d) {
    if (! $data = get_record('data', 'id', $d)) {
        error('Database ID Incorrect');
    }
    if (! $course = get_record('course', 'id', $data->course)) {
        error('Course is misconfigured');
    }
    if (! $cm = get_coursemodule_from_instance('data', $data->id, $course->id)) {
        error('Course Module ID was incorrect');
    }
} else {
    error('Parameter missing');
}

// fill in missing properties needed for updating of instance
$data->course     = $cm->course;
$data->cmidnumber = $cm->idnumber;
$data->instance   = $cm->instance;

if (!$context = get_context_instance(CONTEXT_MODULE, $cm->id)) {
    error('Could not find context');
}

require_login($course->id, false, $cm);

require_capability('mod/data:managetemplates', $context);

if ($userid && ($userid != $USER->id) && !has_capability('mod/data:viewalluserpresets', $context)) {
    error('You are not allowed to access presets from other users');
}

/* Need sesskey security check here for import instruction */
$sesskey = sesskey();

/********************************************************************/
/* Output */
data_print_header($course, $cm, $data, 'presets');

switch ($action) {

        /***************** Deleting *****************/
    case 'confirmdelete' :
        if (!confirm_sesskey()) { // GET request ok here
            error("Sesskey Invalid");
        }

        if ($userid > 0 and ($userid == $USER->id || has_capability('mod/data:manageuserpresets', $context))) {
           //ok can delete
        } else {
            error("Invalid request");
        }

        $path = data_preset_path($course, $userid, $shortname);

        $strwarning = get_string('deletewarning', 'data').'<br />'.
                      data_preset_name($shortname, $path);

        $options = new object();
        $options->fullname = $userid.'/'.$shortname;
        $options->action   = 'delete';
        $options->d        = $data->id;
        $options->sesskey  = sesskey();

        $optionsno = new object();
        $optionsno->d = $data->id;
        notice_yesno($strwarning, 'preset.php', 'preset.php', $options, $optionsno, 'post', 'get');
        print_footer($course);
        exit;
        break;

    case 'delete' :
        if (!data_submitted() and !confirm_sesskey()) {
            error("Invalid request");
        }

        if ($userid > 0 and ($userid == $USER->id || has_capability('mod/data:manageuserpresets', $context))) {
           //ok can delete
        } else {
            error("Invalid request");
        }

        $presetpath = data_preset_path($course, $userid, $shortname);

        if (!clean_preset($presetpath)) {
            error("Error deleting a preset!");
        }
        @rmdir($presetpath);

        $strdeleted = get_string('deleted', 'data');
        notify("$shortname $strdeleted", 'notifysuccess');

        break;


        /***************** Importing *****************/
    case 'importpreset' :
        if (!data_submitted() or !confirm_sesskey()) {
            error("Invalid request");
        }

        $pimporter = new PresetImporter($course, $cm, $data, $userid, $shortname);
        $pimporter->import_options();

        print_footer($course);
        exit;
        break;

        /* Imports a zip file. */
    case 'importzip' :
        if (!data_submitted() or !confirm_sesskey()) {
            error("Invalid request");
        }

        if (!make_upload_directory('temp/data/'.$USER->id)) {
            error("Can't Create Directory");
        }

        $presetfile = $CFG->dataroot.'/temp/data/'.$USER->id;
        clean_preset($presetfile);

        if (!unzip_file($CFG->dataroot."/$course->id/$file", $presetfile, false)) {
            error("Can't unzip file");
        }

        $pimporter = new PresetImporter($course, $cm, $data, -$USER->id, $shortname);
        $pimporter->import_options();

        print_footer($course);
        exit;
        break;

    case 'finishimport':
        if (!data_submitted() or !confirm_sesskey()) {
            error("Invalid request");
        }

        $pimporter = new PresetImporter($course, $cm, $data, $userid, $shortname);
        $pimporter->import();

        $strimportsuccess = get_string('importsuccess', 'data');
        $straddentries = get_string('addentries', 'data');
        $strtodatabase = get_string('todatabase', 'data');
        if (!get_records('data_records', 'dataid', $data->id)) {
            notify("$strimportsuccess <a href='edit.php?d=$data->id'>$straddentries</a> $strtodatabase", 'notifysuccess');
        } else {
            notify("$strimportsuccess", 'notifysuccess');
        }
        break;

        /* Exports as a zip file ready for download. */
    case 'export':
        if (!data_submitted() or !confirm_sesskey()) {
            error("Invalid request");
        }

        echo '<div style="text-align:center">';
        $file = data_presets_export($course, $cm, $data);
        echo get_string('exportedtozip', 'data')."<br />";
        $perminantfile = $CFG->dataroot."/$course->id/moddata/data/$data->id/preset.zip";
        @unlink($perminantfile);
        /* is this created elsewhere? sometimes its not present... */
        make_upload_directory("$course->id/moddata/data/$data->id");

        /* now just move the zip into this folder to allow a nice download */
        if (!rename($file, $perminantfile)) error("Can't move zip");
        echo "<a href='$CFG->wwwroot/file.php/$course->id/moddata/data/$data->id/preset.zip'>".get_string('download', 'data')."</a>";
        echo '</div>';
        break;

        /***************** Exporting *****************/
    case 'save1':
        if (!data_submitted() or !confirm_sesskey()) {
            error("Invalid request");
        }

        $strcontinue = get_string('continue');
        $strwarning = get_string('presetinfo', 'data');
        $strname = get_string('shortname');

        echo '<div style="text-align:center">';
        echo '<p>'.$strwarning.'</p>';
        echo '<form action="preset.php" method="post">';
        echo '<fieldset class="invisiblefieldset">';
        echo '<label for="shorname">'.$strname.'</label> <input type="text" id="shorname" name="name" value="'.$data->name.'" />';
        echo '<input type="hidden" name="action" value="save2" />';
        echo '<input type="hidden" name="d" value="'.$data->id.'" />';
        echo '<input type="hidden" name="sesskey" value="'.$sesskey.'" />';
        echo '<input type="submit" value="'.$strcontinue.'" /></fieldset></form></div>';
        print_footer($course);
        exit;
        break;

    case 'save2':
        if (!data_submitted() or !confirm_sesskey()) {
            error("Invalid request");
        }

        $strcontinue = get_string('continue');
        $stroverwrite = get_string('overwrite', 'data');
        $strname = get_string('shortname');

        $name = optional_param('name', $data->name, PARAM_FILE);

        if (is_directory_a_preset("$CFG->dataroot/data/preset/$USER->id/$name")) {
            notify("Preset already exists: Pick another name or overwrite");

            echo '<div style="text-align:center">';
            echo '<form action="preset.php" method="post">';
            echo '<fieldset class="invisiblefieldset">';
            echo '<label for="shorname">'.$strname.'</label> <input type="textbox" name="name" value="'.$name.'" />';
            echo '<input type="hidden" name="action" value="save2" />';
            echo '<input type="hidden" name="d" value="'.$data->id.'" />';
            echo '<input type="hidden" name="sesskey" value="'.$sesskey.'" />';
            echo '<input type="submit" value="'.$strcontinue.'" /></fieldset></form>';

            echo '<form action="preset.php" method="post">';
            echo '<div>';
            echo '<input type="hidden" name="name" value="'.$name.'" />';
            echo '<input type="hidden" name="action" value="save3" />';
            echo '<input type="hidden" name="d" value="'.$data->id.'" />';
            echo '<input type="hidden" name="sesskey" value="'.$sesskey.'" />';
            echo '<input type="submit" value="'.$stroverwrite.'" /></div></form>';
            echo '</div>';
            print_footer($course);
            exit;
            break;
        }

    case 'save3':
        if (!data_submitted() or !confirm_sesskey()) {
            error("Invalid request");
        }

        $name = optional_param('name', $data->name, PARAM_FILE);
        $presetdirectory = "/data/preset/$USER->id/$name";

        make_upload_directory($presetdirectory);
        clean_preset($CFG->dataroot.$presetdirectory);

        $file = data_presets_export($course, $cm, $data);
        if (!unzip_file($file, $CFG->dataroot.$presetdirectory, false)) {
            error("Can't unzip to the preset directory");
        }
        notify(get_string('savesuccess', 'data'), 'notifysuccess');
        break;
}

$presets = data_get_available_presets($context);

$strimport         = get_string('import');
$strfromfile       = get_string('fromfile', 'data');
$strchooseorupload = get_string('chooseorupload', 'data');
$strusestandard    = get_string('usestandard', 'data');
$strchoose         = get_string('choose');
$strexport         = get_string('export', 'data');
$strexportaszip    = get_string('exportaszip', 'data');
$strsaveaspreset   = get_string('saveaspreset', 'data');
$strsave           = get_string('save', 'data');
$strdelete         = get_string('delete');

echo '<div style="text-align:center">';
echo '<table class="presets" cellpadding="5">';
echo '<tr><td valign="top" colspan="2" align="center"><h3>'.$strexport.'</h3></td></tr>';

echo '<tr><td><label>'.$strexportaszip.'</label>';
helpbutton('exportzip', '', 'data', true, true);
echo '</td><td>';
$options = new object();
$options->action = 'export';
$options->d = $data->id;
$options->sesskey = sesskey();
print_single_button('preset.php', $options, $strexport, 'post');
echo '</td></tr>';

echo '<tr><td><label>'.$strsaveaspreset.'</label>';
helpbutton('savepreset', '', 'data', true, true);
echo '</td><td>';
$options = new object();
$options->action = 'save1';
$options->d = $data->id;
$options->sesskey = sesskey();
print_single_button('preset.php', $options, $strsave, 'post');
echo '</td></tr>';
echo '<tr><td valign="top" colspan="2" align="center"><h3>'.$strimport.'</h3></td></tr>';
echo '<tr><td><label for="fromfile">'.$strfromfile.'</label>';
helpbutton('importfromfile', '', 'data', true, true);
echo '</td><td>';
echo '<form id="uploadpreset" method="post" action="preset.php">';
echo '<fieldset class="invisiblefieldset">';
echo '<input type="hidden" name="d" value="'.$data->id.'" />';
echo '<input type="hidden" name="action" value="importzip" />';
echo '<input type="hidden" name="sesskey" value="'.sesskey().'" />';
echo '<input name="file" size="20" value="" id="fromfile" type="text" /><input name="coursefiles" value="'.$strchooseorupload.'" onclick="return openpopup('."'/files/index.php?id={$course->id}&amp;choose=uploadpreset.file', 'coursefiles', 'menubar=0,location=0,scrollbars,resizable,width=750,height=500', 0".');" type="button" />';
echo '<input type="submit" value="'.$strimport.'" />';
echo '</fieldset></form>';
echo '</td></tr>';

echo '<tr valign="top"><td><label>'.$strusestandard.'</label>';
helpbutton('usepreset', '', 'data', true, true);
echo '</td><td>';

echo '<form id="presets" method="post" action="preset.php" >';
echo '<fieldset class="invisiblefieldset">';
echo '<input type="hidden" name="d" value="'.$data->id.'" />';
echo '<input type="hidden" name="action" value="importpreset" />';
echo '<input type="hidden" name="sesskey" value="'.sesskey().'" />';

$i = 0;
foreach ($presets as $id => $preset) {
    $screenshot = '';
    if (!empty($preset->userid)) {
        $user = get_record('user', 'id', $preset->userid);
        $desc = $preset->name.' ('.fullname($user, true).')';
    } else {
        $desc = $preset->name;
    }

    if (!empty($preset->screenshot)) {
        $screenshot = '<img width="150" class="presetscreenshot" src="'.$preset->screenshot.'" alt="'.get_string('screenshot').' '.$desc.'" />&nbsp;';
    }

    $fullname = $preset->userid.'/'.$preset->shortname;

    $dellink = '';
    if ($preset->userid > 0 and ($preset->userid == $USER->id || has_capability('mod/data:manageuserpresets', $context))) {
        $dellink = '&nbsp;<a href="preset.php?d='.$data->id.'&amp;action=confirmdelete&amp;fullname='.$fullname.'&amp;sesskey='.sesskey().'">'.
                   '<img src="'.$CFG->pixpath.'/t/delete.gif" class="iconsmall" alt="'.$strdelete.' '.$desc.'" /></a>';
    }

    echo '<input type="radio" name="fullname" id="usepreset'.$i.'" value="'.$fullname.'" /><label for="usepreset'.$i++.'">'.$desc.'</label>'.$dellink.'<br />';
}
echo '<br />';
echo '<input type="submit" value="'.$strchoose.'" />';
echo '</fieldset></form>';
echo '</td></tr>';
echo '</table>';
echo '</div>';

print_footer($course);

?>
