<?php // $Id$
/**
 * Import quiz questions into the given category
 *
 * @author Martin Dougiamas, Howard Miller, and many others.
 *         {@link http://moodle.org}
 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
 * @package questionbank
 * @subpackage importexport
 */

    require_once("../config.php");
    require_once("editlib.php" );
    require_once($CFG->libdir . '/uploadlib.php');
    require_once($CFG->libdir . '/questionlib.php');

    list($thispageurl, $courseid, $cmid, $cm, $module, $pagevars) = question_edit_setup(false, false);

    // get parameters
    $params = new stdClass;
    $params->choosefile = optional_param('choosefile','',PARAM_PATH);
    $catfromfile = optional_param('catfromfile', 0, PARAM_BOOL );
    $format = optional_param('format','',PARAM_FILE);
    $params->matchgrades = optional_param('matchgrades','',PARAM_ALPHA);
    $params->stoponerror = optional_param('stoponerror', 0, PARAM_BOOL);
    $params->category = optional_param( 'category', 0, PARAM_INT );

    // get display strings
    $txt = new stdClass();
    $txt->category = get_string('category','quiz');
    $txt->choosefile = get_string('choosefile','quiz');
    $txt->file = get_string('file');
    $txt->fileformat = get_string('fileformat','quiz');
    $txt->fromfile = get_string('fromfile','quiz');
    $txt->importcategory = get_string('importcategory','quiz');
    $txt->importerror = get_string('importerror','quiz');
    $txt->importfilearea = get_string('importfilearea','quiz');
    $txt->importfileupload = get_string('importfileupload','quiz');
    $txt->importfromthisfile = get_string('importfromthisfile','quiz');
    $txt->importquestions = get_string("importquestions", "quiz");
    $txt->matchgrades = get_string('matchgrades','quiz');
    $txt->matchgradeserror = get_string('matchgradeserror','quiz');
    $txt->matchgradesnearest = get_string('matchgradesnearest','quiz');
    $txt->modulename = get_string('modulename','quiz');
    $txt->modulenameplural = get_string('modulenameplural','quiz');
    $txt->onlyteachersimport = get_string('onlyteachersimport','quiz');
    $txt->questions = get_string("questions", "quiz");
    $txt->quizzes = get_string('modulenameplural', 'quiz');
    $txt->stoponerror = get_string('stoponerror', 'quiz');
    $txt->upload = get_string('upload');
    $txt->uploadproblem = get_string('uploadproblem');
    $txt->uploadthisfile = get_string('uploadthisfile');

    // matching options
    $matchgrades = array();
    $matchgrades['error'] = $txt->matchgradeserror;
    $matchgrades['nearest'] = $txt->matchgradesnearest;

    // not sure where $pagevars['cat'] comes from, but it doesn't respect
    // the user's choice on the form - so this bodge
    if (empty($params->category)) {
        $params->category = $pagevars['cat'];
    }

    if (!$category = get_record("question_categories", "id", $params->category)) {
        // if no valid category was given, use the default category
        print_error('nocategory','quiz');
    }

    // check category is valid (against THIS courseid, before we change it)
    $validcats = question_category_options( $cmid, false, true );
    if (!array_key_exists( $params->category, $validcats )) {
        print_error( 'invalidcategory', 'quiz' );
    }

    $localcourseid = $cmid;
    $courseid = $category->course;

    if (!$course = get_record("course", "id", $courseid)) {
        error("Invalid course!");
    }

    require_login($course->id, false);

    $context = get_context_instance(CONTEXT_COURSE, $course->id);
    require_capability('moodle/question:import', $context);

    // ensure the files area exists for this course
    make_upload_directory( "$course->id" );


    //==========
    // PAGE HEADER
    //==========

    if ($cm!==null) {
        $strupdatemodule = has_capability('moodle/course:manageactivities', get_context_instance(CONTEXT_COURSE, $course->id))
            ? update_module_button($cm->id, $course->id, get_string('modulename', $cm->modname))
            : "";
        $navlinks = array();
        $navlinks[] = array('name' => get_string('modulenameplural', $cm->modname), 'link' => "$CFG->wwwroot/mod/{$cm->modname}/index.php?id=$course->id", 'type' => 'activity');
        $navlinks[] = array('name' => format_string($module->name), 'link' => "$CFG->wwwroot/mod/{$cm->modname}/view.php?cmid={$cm->id}", 'type' => 'title');
        $navlinks[] = array('name' => $txt->importquestions, 'link' => '', 'type' => 'title');
        $navigation = build_navigation($navlinks);
        print_header_simple($txt->importquestions, '', $navigation, "", "", true, $strupdatemodule);

        $currenttab = 'edit';
        $mode = 'import';
        ${$cm->modname} = $module;
        include($CFG->dirroot."/mod/$cm->modname/tabs.php");
    } else {
        // Print basic page layout.
        $navlinks = array();
        $navlinks[] = array('name' => $txt->importquestions, 'link' => '', 'type' => 'title');
        $navigation = build_navigation($navlinks);
           
        print_header_simple($txt->importquestions, '', $navigation);
        // print tabs
        $currenttab = 'import';
        include('tabs.php');
    }


    // file upload form sumitted
    if (!empty($format) and confirm_sesskey() ) { 

        // file checks out ok
        $fileisgood = false;

        // work out if this is an uploaded file 
        // or one from the filesarea.
        if (!empty($params->choosefile)) {
            $importfile = "{$CFG->dataroot}/{$course->id}/{$params->choosefile}";
            if (file_exists($importfile)) {
                $fileisgood = true;
            }
            else {
                notify($txt->uploadproblem);
            }
        } else {
            // must be upload file
            if (empty($_FILES['newfile'])) {
                notify( $txt->uploadproblem );
            }
            else if ((!is_uploaded_file($_FILES['newfile']['tmp_name']) or $_FILES['newfile']['size'] == 0)) {
                notify( $txt->uploadproblem );
            }
            else {
                $importfile = $_FILES['newfile']['tmp_name'];
                $fileisgood = true;
            }
        }

        // process if we are happy file is ok
        if ($fileisgood) { 

            if (! is_readable("format/$format/format.php")) {
                error( get_string('formatnotfound','quiz', $format) );
            }

            require("format.php");  // Parent class
            require("format/$format/format.php");

            $classname = "qformat_$format";
            $qformat = new $classname();

            // load data into class
            $qformat->setCategory( $category );
            $qformat->setCourse( $course );
            $qformat->setFilename( $importfile );
            $qformat->setMatchgrades( $params->matchgrades );
            $qformat->setCatfromfile( $catfromfile );
            $qformat->setStoponerror( $params->stoponerror );

            // Do anything before that we need to
            if (! $qformat->importpreprocess()) {             
                error( $txt->importerror, $thispageurl->out(false, array('category'=>$category->id)));
            }

            // Process the uploaded file
            if (! $qformat->importprocess() ) {     
                error( $txt->importerror, $thispageurl->out(false, array('category'=>$category->id)));
            }

            // In case anything needs to be done after
            if (! $qformat->importpostprocess()) {
                error( $txt->importerror, $thispageurl->out(false, array('category'=>$category->id)));
            }

            echo "<hr />";
            print_continue("edit.php?".$thispageurl->get_query_string());
            print_footer($course);
            exit;
        }
    }

    /// Print upload form

    // get list of available import formats
    $fileformatnames = get_import_export_formats( 'import' );

    print_heading_with_help($txt->importquestions, "import", "quiz");

    /// Get all the existing categories now
    $catmenu = question_category_options($course->id, false, true);
   
    //==========
    // DISPLAY
    //==========
 
    ?>

    <form id="form" enctype="multipart/form-data" method="post" action="import.php">
        <fieldset class="invisiblefieldset" style="display: block;">
            <input type="hidden" name="sesskey" value="<?php echo sesskey(); ?>" />
            <input type="hidden" name="courseid" value="<?php echo $localcourseid ?>" />
            <?php echo $thispageurl->hidden_params_out(array(), 3); ?>
            <?php print_simple_box_start("center"); ?>
            <table cellpadding="5">
                <tr>
                    <td align="right"><?php echo $txt->category; ?>:</td>
                    <td><?php choose_from_menu($catmenu, "category", $category->id, ""); ?>
                        <?php echo $txt->fromfile; ?>
                        <input name="catfromfile" type="checkbox" />
                        <?php helpbutton('importcategory', $txt->importcategory, 'quiz'); ?></td>
                </tr>

                <tr>
                    <td align="right"><?php echo $txt->fileformat; ?>:</td>
                    <td><?php choose_from_menu($fileformatnames, 'format', 'gift', '');
                        helpbutton("import", $txt->importquestions, 'quiz'); ?></td>
                </tr>
                <tr>
                    <td align="right"><?php echo $txt->matchgrades; ?></td>
                    <td><?php choose_from_menu($matchgrades,'matchgrades',$txt->matchgradeserror,'' );
                        helpbutton('matchgrades', $txt->matchgrades, 'quiz'); ?></td>
                </tr>
                <tr>
                    <td align="right"><?php echo $txt->stoponerror; ?></td>
                    <td><input name="stoponerror" type="checkbox" checked="checked" />
                    <?php helpbutton('stoponerror', $txt->stoponerror, 'quiz'); ?></td>
                </tr>
            </table>
            <?php
            print_simple_box_end();

            print_simple_box_start('center'); ?>
            <?php echo $txt->importfileupload; ?>
            <table cellpadding="5">
                <tr>
                    <td align="right"><?php echo $txt->upload; ?>:</td>
                    <td><?php upload_print_form_fragment(1,array('newfile'),null,false,null,$course->maxbytes,0,false); ?></td>
                </tr>

                <tr>
                    <td>&nbsp;</td>
                    <td><input type="submit" name="save" value="<?php echo $txt->uploadthisfile; ?>" /></td>
                </tr>
            </table>
            <?php
            print_simple_box_end();

            print_simple_box_start('center'); ?>
            <?php echo $txt->importfilearea; ?>
            <table cellpadding="5">
                <tr>
                    <td align="right"><?php echo $txt->file; ?>:</td>
                    <td><input type="text" name="choosefile" size="50" /></td>
                </tr>

                <tr>
                    <td>&nbsp;</td>
                    <td><?php  button_to_popup_window ("/files/index.php?id={$course->id}&amp;choose=form.choosefile", 
                        "coursefiles", $txt->choosefile, 500, 750, $txt->choosefile); ?>
                        <input type="submit" name="save" value="<?php echo $txt->importfromthisfile; ?>" /></td>
                </tr>
            </table>
            <?php 
            print_simple_box_end(); ?>
        </fieldset>
    </form>

    <?php
    print_footer($course);

?>