assignment.class.php

来自「很棒的在线教学系统」· PHP 代码 · 共 1,080 行 · 第 1/3 页

<?php // $Id: assignment.class.php,v 1.32.2.15 2008/10/09 11:22:14 poltawski Exp $
require_once($CFG->libdir.'/formslib.php');

define('ASSIGNMENT_STATUS_SUBMITTED', 'submitted'); // student thinks it is finished
define('ASSIGNMENT_STATUS_CLOSED', 'closed');       // teacher prevents more submissions

/**
 * Extend the base assignment class for assignments where you upload a single file
 *
 */
class assignment_upload extends assignment_base {

    function assignment_upload($cmid='staticonly', $assignment=NULL, $cm=NULL, $course=NULL) {
        parent::assignment_base($cmid, $assignment, $cm, $course);
        $this->type = 'upload';
    }

    function view() {
        global $USER;

        require_capability('mod/assignment:view', $this->context);

        add_to_log($this->course->id, 'assignment', 'view', "view.php?id={$this->cm->id}", $this->assignment->id, $this->cm->id);

        $this->view_header();

        if ($this->assignment->timeavailable > time()
          and !has_capability('mod/assignment:grade', $this->context)      // grading user can see it anytime
          and $this->assignment->var3) {                                   // force hiding before available date
            print_simple_box_start('center', '', '', 0, 'generalbox', 'intro');
            print_string('notavailableyet', 'assignment');
            print_simple_box_end();
        } else {
            $this->view_intro();
        }

        $this->view_dates();

        if (has_capability('mod/assignment:submit', $this->context)) {
            $filecount = $this->count_user_files($USER->id);
            $submission = $this->get_submission($USER->id);

            $this->view_feedback();

            if (!$this->drafts_tracked() or !$this->isopen() or $this->is_finalized($submission)) {
                print_heading(get_string('submission', 'assignment'), '', 3);
            } else {
                print_heading(get_string('submissiondraft', 'assignment'), '', 3);
            }

            if ($filecount and $submission) {
                print_simple_box($this->print_user_files($USER->id, true), 'center');
            } else {
                if (!$this->isopen() or $this->is_finalized($submission)) {
                    print_simple_box(get_string('nofiles', 'assignment'), 'center');
                } else {
                    print_simple_box(get_string('nofilesyet', 'assignment'), 'center');
                }
            }

            $this->view_upload_form();

            if ($this->notes_allowed()) {
                print_heading(get_string('notes', 'assignment'), '', 3);
                $this->view_notes();
            }

            $this->view_final_submission();
        }
        $this->view_footer();
    }


    function view_feedback($submission=NULL) {
        global $USER, $CFG;
        require_once($CFG->libdir.'/gradelib.php');

        if (!$submission) { /// Get submission for this assignment
            $submission = $this->get_submission($USER->id);
        }

        if (empty($submission->timemarked)) {   /// Nothing to show, so print nothing
            if ($this->count_responsefiles($USER->id)) {
                print_heading(get_string('responsefiles', 'assignment', $this->course->teacher), '', 3);
                $responsefiles = $this->print_responsefiles($USER->id, true);
                print_simple_box($responsefiles, 'center');
            }
            return;
        }

        $grading_info = grade_get_grades($this->course->id, 'mod', 'assignment', $this->assignment->id, $USER->id);
        $item = $grading_info->items[0];
        $grade = $item->grades[$USER->id];

        if ($grade->hidden or $grade->grade === false) { // hidden or error
            return;
        }

        if ($grade->grade === null and empty($grade->str_feedback)) {   /// Nothing to show yet
            return;
        }

        $graded_date = $grade->dategraded;
        $graded_by   = $grade->usermodified;

    /// We need the teacher info
        if (!$teacher = get_record('user', 'id', $graded_by)) {
            error('Could not find the teacher');
        }

    /// Print the feedback
        print_heading(get_string('submissionfeedback', 'assignment'), '', 3);

        echo '<table cellspacing="0" class="feedback">';

        echo '<tr>';
        echo '<td class="left picture">';
        print_user_picture($teacher, $this->course->id, $teacher->picture);
        echo '</td>';
        echo '<td class="topic">';
        echo '<div class="from">';
        echo '<div class="fullname">'.fullname($teacher).'</div>';
        echo '<div class="time">'.userdate($graded_date).'</div>';
        echo '</div>';
        echo '</td>';
        echo '</tr>';

        echo '<tr>';
        echo '<td class="left side">&nbsp;</td>';
        echo '<td class="content">';
        if ($this->assignment->grade) {
            echo '<div class="grade">';
            echo get_string("grade").': '.$grade->str_long_grade;
            echo '</div>';
            echo '<div class="clearer"></div>';
        }

        echo '<div class="comment">';
        echo $grade->str_feedback;
        echo '</div>';
        echo '</tr>';

        echo '<tr>';
        echo '<td class="left side">&nbsp;</td>';
        echo '<td class="content">';
        echo $this->print_responsefiles($USER->id, true);
        echo '</tr>';

        echo '</table>';
    }


    function view_upload_form() {
        global $CFG, $USER;

        $submission = $this->get_submission($USER->id);

        $struploadafile = get_string('uploadafile');
        $maxbytes = $this->assignment->maxbytes == 0 ? $this->course->maxbytes : $this->assignment->maxbytes;
        $strmaxsize = get_string('maxsize', '', display_size($maxbytes));

        if ($this->is_finalized($submission)) {
            // no uploading
            return;
        }

        if ($this->can_upload_file($submission)) {
            echo '<div style="text-align:center">';
            echo '<form enctype="multipart/form-data" method="post" action="upload.php">';
            echo '<fieldset class="invisiblefieldset">';
            echo "<p>$struploadafile ($strmaxsize)</p>";
            echo '<input type="hidden" name="id" value="'.$this->cm->id.'" />';
            echo '<input type="hidden" name="action" value="uploadfile" />';
            require_once($CFG->libdir.'/uploadlib.php');
            upload_print_form_fragment(1,array('newfile'),null,false,null,0,$this->assignment->maxbytes,false);
            echo '<input type="submit" name="save" value="'.get_string('uploadthisfile').'" />';
            echo '</fieldset>';
            echo '</form>';
            echo '</div>';
            echo '<br />';
        }

    }

    function view_notes() {
        global $USER;

        if ($submission = $this->get_submission($USER->id)
          and !empty($submission->data1)) {
            print_simple_box(format_text($submission->data1, FORMAT_HTML), 'center', '630px');
        } else {
            print_simple_box(get_string('notesempty', 'assignment'), 'center');
        }
        if ($this->can_update_notes($submission)) {
            $options = array ('id'=>$this->cm->id, 'action'=>'editnotes');
            echo '<div style="text-align:center">';
            print_single_button('upload.php', $options, get_string('edit'), 'post', '_self', false);
            echo '</div>';
        }
    }

    function view_final_submission() {
        global $CFG, $USER;

        $submission = $this->get_submission($USER->id);

        if ($this->isopen() and $this->can_finalize($submission)) {
            //print final submit button
            print_heading(get_string('submitformarking','assignment'), '', 3);
            echo '<div style="text-align:center">';
            echo '<form method="post" action="upload.php">';
            echo '<fieldset class="invisiblefieldset">';
            echo '<input type="hidden" name="id" value="'.$this->cm->id.'" />';
            echo '<input type="hidden" name="action" value="finalize" />';
            echo '<input type="submit" name="formarking" value="'.get_string('sendformarking', 'assignment').'" />';
            echo '</fieldset>';
            echo '</form>';
            echo '</div>';
        } else if (!$this->isopen()) {
            print_heading(get_string('nomoresubmissions','assignment'), '', 3);

        } else if ($this->drafts_tracked() and $state = $this->is_finalized($submission)) {
            if ($state == ASSIGNMENT_STATUS_SUBMITTED) {
                print_heading(get_string('submitedformarking','assignment'), '', 3);
            } else {
                print_heading(get_string('nomoresubmissions','assignment'), '', 3);
            }
        } else {
            //no submission yet
        }
    }


    /**
     * Return true if var3 == hide description till available day
     *
     *@return boolean
     */
    function description_is_hidden() {
        return ($this->assignment->var3 && (time() <= $this->assignment->timeavailable));
    }

    function custom_feedbackform($submission, $return=false) {
        global $CFG;

        $mode         = optional_param('mode', '', PARAM_ALPHA);
        $offset       = optional_param('offset', 0, PARAM_INT);
        $forcerefresh = optional_param('forcerefresh', 0, PARAM_BOOL);

        $output = get_string('responsefiles', 'assignment').': ';

        $output .= '<form enctype="multipart/form-data" method="post" '.
             "action=\"$CFG->wwwroot/mod/assignment/upload.php\">";
        $output .= '<div>';
        $output .= '<input type="hidden" name="id" value="'.$this->cm->id.'" />';
        $output .= '<input type="hidden" name="action" value="uploadresponse" />';
        $output .= '<input type="hidden" name="mode" value="'.$mode.'" />';
        $output .= '<input type="hidden" name="offset" value="'.$offset.'" />';
        $output .= '<input type="hidden" name="userid" value="'.$submission->userid.'" />';
        require_once($CFG->libdir.'/uploadlib.php');
        $output .= upload_print_form_fragment(1,array('newfile'),null,false,null,0,0,true);
        $output .= '<input type="submit" name="save" value="'.get_string('uploadthisfile').'" />';
        $output .= '</div>';
        $output .= '</form>';

        if ($forcerefresh) {
            $output .= $this->update_main_listing($submission);
        }

        $responsefiles = $this->print_responsefiles($submission->userid, true);
        if (!empty($responsefiles)) {
            $output .= $responsefiles;
        }

        if ($return) {
            return $output;
        }
        echo $output;
        return;
    }


    function print_student_answer($userid, $return=false){
        global $CFG;

        $filearea = $this->file_area_name($userid);
        $submission = $this->get_submission($userid);

        $output = '';

        if ($basedir = $this->file_area($userid)) {
            if ($this->drafts_tracked() and $this->isopen() and !$this->is_finalized($submission)) {
                $output .= '<strong>'.get_string('draft', 'assignment').':</strong> ';
            }

            if ($this->notes_allowed() and !empty($submission->data1)) {
                $output .= link_to_popup_window ('/mod/assignment/type/upload/notes.php?id='.$this->cm->id.'&amp;userid='.$userid,
                                                'notes'.$userid, get_string('notes', 'assignment'), 500, 780, get_string('notes', 'assignment'), 'none', true, 'notesbutton'.$userid);
                $output .= '&nbsp;';
            }

            if ($files = get_directory_list($basedir, 'responses')) {
                require_once($CFG->libdir.'/filelib.php');
                foreach ($files as $key => $file) {
                    $icon = mimeinfo('icon', $file);
                    $ffurl = get_file_url("$filearea/$file");
                    $output .= '<a href="'.$ffurl.'" ><img class="icon" src="'.$CFG->pixpath.'/f/'.$icon.'" alt="'.$icon.'" />'.$file.'</a>&nbsp;';
                }
            }
        }
        $output = '<div class="files">'.$output.'</div>';
        $output .= '<br />';

        return $output;
    }


    /**
     * Produces a list of links to the files uploaded by a user
     *
     * @param $userid int optional id of the user. If 0 then $USER->id is used.
     * @param $return boolean optional defaults to false. If true the list is returned rather than printed
     * @return string optional
     */
    function print_user_files($userid=0, $return=false) {
        global $CFG, $USER;

        $mode    = optional_param('mode', '', PARAM_ALPHA);
        $offset  = optional_param('offset', 0, PARAM_INT);

        if (!$userid) {
            if (!isloggedin()) {
                return '';
            }
            $userid = $USER->id;
        }

        $filearea = $this->file_area_name($userid);

        $output = '';

        $submission = $this->get_submission($userid);

        $candelete = $this->can_delete_files($submission);
        $strdelete   = get_string('delete');

        if ($this->drafts_tracked() and $this->isopen() and !$this->is_finalized($submission) and !empty($mode)) {                 // only during grading
            $output .= '<strong>'.get_string('draft', 'assignment').':</strong><br />';
        }

        if ($this->notes_allowed() and !empty($submission->data1) and !empty($mode)) { // only during grading

            $npurl = $CFG->wwwroot."/mod/assignment/type/upload/notes.php?id={$this->cm->id}&amp;userid=$userid&amp;offset=$offset&amp;mode=single";
            $output .= '<a href="'.$npurl.'">'.get_string('notes', 'assignment').'</a><br />';

        }

        if ($basedir = $this->file_area($userid)) {
            if ($files = get_directory_list($basedir, 'responses')) {
                require_once($CFG->libdir.'/filelib.php');