"; print_r($state); echo "\n"; if ($refresh) { echo "
Refresh ID: $refresh->id
"; } echo "
"; print_r($item); echo "\n"; echo "
You may now
bossa_app_id>do work.
";
} else {
echo "Congratulations - you have completed this course.";
$links[] = "
";
$up_link = "Course home page";
show_nav($links, $up_link, $view_id);
}
page_footer();
}
function show_refresh_finished() {
page_header("Refresh completed");
echo "Return to courses";
page_footer();
}
function show_nav($links, $up_link, $view_id) {
global $course;
echo "
| $link | \n"; } echo "
$up_link
";
}
// show an item (lesson, exercise, answer page)
//
function show_item($iter, $view_id, $prev_view_id, $mode, $repeat=null) {
global $user;
global $course;
global $bolt_ex;
global $refresh;
global $url_args;
$item = $iter->item;
page_header();
$bolt_query_string = $item->query_string;
$links = array();
if ($prev_view_id) {
$links[] = "";
}
$next = "
";
if ($item->is_exercise()) {
$bolt_ex->mode = $mode;
$bolt_ex->index = 0;
switch ($mode) {
case BOLT_MODE_SHOW:
echo "
Score on this exercise set: $avg%"; if ($repeat->flags & REVIEW) { //echo "
";
//print_r($repeat);
//echo "";
$name = urlencode($repeat->unit->name);
$r = "Review, then repeat exercises";
$links[] = $r;
}
if ($repeat->flags & REPEAT) {
$r = "Repeat exercises";
$links[] = $r;
}
if ($repeat->flags & NEXT) {
$links[] = $next;
}
} else {
$links[] = $next;
}
$up_link = "Course home page";
show_nav($links, $up_link, $view_id);
page_footer();
if ($refresh) {
$refresh->update("last_view_id=$view_id");
} else {
$e = new BoltEnrollment();
$e->user_id = $user->id;
$e->course_id = $course->id;
$e->update("last_view_id=$view_id");
}
}
// Show the student the results of an old exercise; no navigation items
//
function show_answer_page($iter, $score) {
global $bolt_ex;
$bolt_ex->mode = BOLT_MODE_ANSWER;
$bolt_ex->index = 0;
$item = $iter->item;
page_header();
$bolt_query_string = $item->query_string;
require_once($item->filename);
if (function_exists('bolt_divide')) bolt_divide();
$score_pct = number_format($score*100);
echo "Score: $score_pct%";
page_footer();
}
function start_course() {
global $user;
global $course;
global $course_doc;
BoltEnrollment::delete($user->id, $course->id);
$iter = new BoltIter($course_doc);
$iter->at();
$now = time();
$mode = default_mode($iter->item);
$view_id = create_view($iter, $mode, 0);
BoltEnrollment::insert("(create_time, user_id, course_id, last_view_id) values ($now, $user->id, $course->id, $view_id)");
show_item($iter, $view_id, 0, $mode);
}
function start_refresh() {
global $course_doc;
global $refresh;
$xset_result = BoltXsetResult::lookup_id($refresh->xset_result_id);
if (!$xset_result) error_page("Exercise set result not found");
$view = BoltView::lookup_id($xset_result->view_id);
if (!$view) error_page("view not found");
$iter = new BoltIter($course_doc);
$iter->decode_state($view->state);
$iter->at();
$xset = $iter->xset;
if (!$xset || $xset->name != $xset_result->name) {
error_page("missing exercise set");
}
$xset->restart($iter);
$iter->at();
$mode = default_mode($iter->item);
$view_id = create_view($iter, $mode, 0);
show_item($iter, $view_id, 0, $mode);
}
function show_next($iter, $view) {
global $refresh, $user, $course;
$iter->next();
if ($refresh) {
$iter->at();
if (!$iter->xset) {
// if we're doing a refresh and are no longer in an xset,
// we must have finished the refresh
//
show_refresh_finished();
$refresh->update('count=count+1');
return;
}
}
if ($iter->item) {
$state = $iter->encode_state();
$mode = default_mode($iter->item);
$view_id = create_view($iter, $mode, $view->id);
show_item($iter, $view_id, $view->id, $mode);
} else {
// course finished
$iter->frac_done = 1;
$fin_view_id = create_view($iter, BOLT_MODE_FINISHED, $view->id);
$e = new BoltEnrollment();
$e->user_id = $user->id;
$e->course_id = $course->id;
$e->update("last_view_id=$fin_view_id");
show_finished_page($fin_view_id, $view->id);
}
}
$user = get_logged_in_user();
BoltUser::lookup($user);
$course_id = get_int('course_id');
$refresh_id = get_int('refresh_id', true);
$refresh = null;
$url_args = "course_id=$course_id";
if ($refresh_id) {
$refresh = BoltRefreshRec::lookup_id($refresh_id);
if (!$refresh) error_page("No such refresh");
if ($refresh->user_id != $user->id) error_page("Wrong user");
if ($refresh->course_id != $course_id) error_page("Wrong course");
$url_args .= "&refresh_id=$refresh_id";
}
$course = BoltCourse::lookup_id($course_id);
if (!$course) {
error_page("no such course");
}
$view_id = get_int('view_id', true);
$action = sanitize_tags(get_str('action', true));
$course_doc = require_once($course->doc_file());
switch ($action) {
case 'start':
if (info_incomplete($user)) {
request_info($user, $course);
exit();
}
if ($refresh) {
start_refresh();
exit();
}
$e = BoltEnrollment::lookup($user->id, $course_id);
if ($e) {
page_header();
echo "You are already enrolled in $course->name.
Are you sure you want to start over from the beginning?
"; show_button( "bolt_sched.php?action=start_confirm&$url_args", "Yes", "Start this course from the beginning" ); show_button( "bolt_sched.php?action=resume&$url_args", "Resume", "Resume course from current position" ); page_footer(); exit(); } // fall through case 'start_confirm': start_course(); break; case 'update_info': update_info(); start_course(); break; case 'prev': $view = finalize_view($view_id, BOLT_ACTION_PREV); debug_show_state(unserialize($view->state), "Initial"); if ($view->prev_view_id) { $view = BoltView::lookup_id($view->prev_view_id); $iter = new BoltIter($course_doc); $iter->decode_state($view->state); $iter->at(); $mode = $view->mode; if ($mode == BOLT_MODE_ANSWER) { $v2 = BoltView::lookup_id($view->prev_view_id); $result = BoltResult::lookup_id($v2->result_id); srand($v2->id); $bolt_ex->score = $result->score; $bolt_ex->query_string = $result->response; } $view_id = create_view($iter, $mode, $view->prev_view_id); show_item($iter, $view_id, $view->prev_view_id, $mode); } else { error_page("At start of course"); } break; case 'next': // "next" button in lesson or exercise answer page $view = finalize_view($view_id, BOLT_ACTION_NEXT); debug_show_state(unserialize($view->state), "Initial"); $iter = new BoltIter($course_doc); $iter->decode_state($view->state); show_next($iter, $view); break; case 'answer': // submit answer in exercise $view = finalize_view($view_id, BOLT_ACTION_SUBMIT); debug_show_state(unserialize($view->state), "Initial"); $iter = new BoltIter($course_doc); $iter->decode_state($view->state); $iter->at(); debug_show_item($iter->item); $item = $iter->item; if (!$item->is_exercise()) { print_r($item); error_page("expected an exercise"); } if ($view->item_name != $item->name) { error_page("unexpected name"); } // compute the score $bolt_ex->query_string = $_SERVER['QUERY_STRING']; $bolt_ex->mode = BOLT_MODE_SCORE; $bolt_ex->index = 0; $bolt_ex->score = 0; $bolt_query_string = $item->query_string; srand($view_id); ob_start(); // buffer output to avoid showing exercise text require($item->filename); ob_end_clean(); $bolt_ex->score /= $bolt_ex->index; if ($item->callback) { call_user_func( $item->callback, $bolt_ex->score, $bolt_ex->query_string ); } // make a record of the result $qs = BoltDb::escape_string($_SERVER['QUERY_STRING']); $now = time(); $result_id = BoltResult::insert( "(create_time, user_id, course_id, view_id, item_name, score, response) values ($now, $user->id, $course->id, $view->id, '$view->item_name', $bolt_ex->score, '$qs')" ); $view->update("result_id=$result_id"); // If this is part of an exercise set, call its callback function // $repeat = null; $xset = $iter->xset; if ($xset) { $is_last = $xset->xset_record_score( $iter, $bolt_ex->score, $view->id, $avg_score, $repeat ); if ($repeat) $repeat->avg_score = $avg_score; if ($is_last) { // if the exercise set if finished, make or update DB records // if ($xset->callback) { call_user_func($xset->callback, $avg_score); } $now = time(); $id = BoltXsetResult::insert("(create_time, user_id, course_id, name, score, view_id) values ($now, $user->id, $course->id, '$xset->name', $avg_score, $view_id)"); $refresh_intervals = $xset->refresh; if ($refresh_intervals) { $refresh_rec = BoltRefreshRec::lookup( "user_id=$user->id and course_id=$course->id and name='$xset->name'" ); if ($refresh_rec) { $count = $refresh_rec->count; $n = count($refresh_intervals->intervals); if ($count >= $n) { $count = $n - 1; } $due_time = time() + $refresh_intervals->intervals[$count]*86400; $refresh_rec->update("create_time=$now, xset_result_id=$id, due_time=$due_time"); } else { $due_time = time() + $refresh_intervals->intervals[0]*86400; BoltRefreshRec::insert( "(user_id, course_id, name, create_time, xset_result_id, due_time, count) values ($user->id, $course->id, '$xset->name', $now, $id, $due_time, 0)" ); } } } } // show the answer page if ($item->has_answer_page) { srand($view_id); $view_id = create_view($iter, BOLT_MODE_ANSWER, $view->id); show_item($iter, $view_id, $view->id, BOLT_MODE_ANSWER, $repeat); } else { show_next($iter, $view); } break; case 'answer_page': $view = BoltView::lookup_id($view_id); $iter = new BoltIter($course_doc); $iter->decode_state($view->state); $iter->at(); if ($iter->item->name != $view->item_name) { error_page("Exercise no longer exists in course"); } $result = BoltResult::lookup_id($view->result_id); srand($view_id); $bolt_ex->query_string = $result->response; show_answer_page($iter, $result->score); break; case 'course_home': $view = finalize_view($view_id, BOLT_ACTION_COURSE_HOME); Header("Location: bolt.php"); break; case 'review': // user chose to do review then repeat an exercise set // $view = finalize_view($view_id, BOLT_ACTION_REVIEW); debug_show_state(unserialize($view->state), "Initial"); $iter = new BoltIter($course_doc); $iter->decode_state($view->state); $iter->at(); if (!$iter->xset) { echo "NO XSET"; exit; } $xset = $iter->xset; $unit_name = sanitize_tags(get_str('unit_name')); $found = $xset->start_review($iter, $unit_name); if (!$found) { echo "REVIEW UNIT MISSING"; exit; } $iter->at(); $mode = default_mode($iter->item); $view_id = create_view($iter, $mode, $view->id); show_item($iter, $view_id, $view->id, $mode); break; case 'repeat': // user chose to repeat an exercise set // $view = finalize_view($view_id, BOLT_ACTION_REPEAT); debug_show_state(unserialize($view->state), "Initial"); $iter = new BoltIter($course_doc); $iter->decode_state($view->state); $iter->at(); if (!$iter->xset) { echo "NO XSET"; exit; } $xset = $iter->xset; $xset->restart($iter); $iter->at(); $mode = default_mode($iter->item); $view_id = create_view($iter, $mode, $view->id); show_item($iter, $view_id, $view->id, $mode); break; case 'resume': // user chose to resume a course or refresh // if ($refresh) { if ($refresh->last_view_id) { $view = BoltView::lookup_id($refresh->last_view_id); } else { start_refresh(); exit(); } } else { $view = null; $e = BoltEnrollment::lookup($user->id, $course_id); if ($e) { $view = BoltView::lookup_id($e->last_view_id); } if (!$view) { start_course(); break; } } if ($view->mode == BOLT_MODE_FINISHED) { show_finished_page($view->id, $view->prev_view_id); break; } $iter = new BoltIter($course_doc); $iter->decode_state($view->state); $iter->at(); $mode = $view->mode; if ($view->item_name == $iter->item->name && ($mode == BOLT_MODE_ANSWER)) { // if we're returning to an answer page, // we need to look up the user's responses and the score. // $view_orig = BoltView::lookup_id($view->prev_view_id); $result = BoltResult::lookup_id($view_orig->result_id); srand($view_orig->id); $bolt_ex->query_string = $result->response; $bolt_ex->score = $result->score; $bolt_ex->index = 0; $view_id = create_view($iter, $mode, $view_orig->id); show_item($iter, $view_id, $view_orig->id, $mode); } else { $view_id = create_view($iter, $mode, $view->id); show_item($iter, $view_id, $view->id, $mode); } break; case 'question': $view = finalize_view($view_id, BOLT_ACTION_QUESTION); debug_show_state(unserialize($view->state), "Initial"); $now = time(); $question = BoltDb::escape_string(get_str('question')); BoltQuestion::insert("(create_time, user_id, course_id, name, mode, question, state) values ($now, $user->id, $course->id, '$view->item_name', $view->mode, '$question', 0)"); page_header(); echo " Thanks; we have recorded your question. Questions help us improve this course. We aren't able to individually respond to all questions. Responses are delivered as private messages.
Resume course "; page_footer(); break; default: error_page("unknown action: $action"); } ?>