Ending state: "; print_r($iter->state); echo "\n"; } return BoltView::insert("(user_id, course_id, item_name, start_time, mode, state, fraction_done, prev_view_id) values ($user->id, $course->id, '$item->name', $now, $mode, '$state', $iter->frac_done, $prev_view_id)"); } // show a page saying the course has been completed // function show_finished_page($view_id, $prev_view_id) { global $course; page_head(null); if (function_exists('bolt_header')) bolt_header("Course completed"); echo "Congratulations - you have completed this course."; $prev = "id&action=prev&view_id=$view_id><< Prev"; echo "
| $prev | Up |
| $link | "; } echo "
question link "; } // show an item (lesson, exercise, answer page) // function show_item($iter, $view_id, $prev_view_id, $mode, $repeat=null) { global $user; global $course; global $bolt_ex_mode; global $bolt_ex_index; global $bolt_ex_score; global $bolt_query_string; $item = $iter->item; page_head(null); if (function_exists('bolt_header')) bolt_header($item->title); $bolt_query_string = $item->query_string; $links = array(); if ($prev_view_id) { $links[] = "id&action=prev&view_id=$view_id><< Prev"; } $next = "id&action=next&view_id=$view_id>Next >>"; if ($item->is_exercise()) { $bolt_ex_mode = $mode; $bolt_ex_index = 0; switch ($mode) { case BOLT_MODE_SHOW: echo "
"; break; case BOLT_MODE_ANSWER: require($item->filename); if (function_exists('bolt_divide')) bolt_divide(); $score_pct = number_format($bolt_ex_score*100); echo "Score: $score_pct%"; break; } } else { require_once($item->filename); if (function_exists('bolt_divide')) bolt_divide(); } if ($repeat) { if ($repeat->flags & REVIEW) { echo "";
print_r($repeat);
echo "";
$name = urlencode($repeat->unit->name);
$r = "id&action=review&view_id=$view_id&unit_name=$name>Review";
$links[] = $r;
}
if ($repeat->flags & REPEAT) {
$r = "id&action=repeat&view_id=$view_id>Repeat";
$links[] = $r;
}
if ($repeat->flags & NEXT) {
$links[] = $next;
}
} else {
$links[] = $next;
}
$up_link = "id&action=course_home&view_id=$view_id>Up";
show_nav($links, $up_link);
if (function_exists('bolt_footer')) bolt_footer();
$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_mode;
global $bolt_ex_index;
global $bolt_query_string;
$bolt_ex_mode = BOLT_MODE_ANSWER;
$bolt_ex_index = 0;
$item = $iter->item;
page_head(null);
if (function_exists('bolt_header')) bolt_header($item->title);
$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: $score_pct%";
if (function_exists('bolt_footer')) bolt_footer();
}
function start_course($course_doc) {
global $user;
global $course;
BoltEnrollment::delete($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);
}
$e = BoltEnrollment::lookup($user->id, $course_id);
switch ($action) {
case 'start':
if (info_incomplete($user)) {
request_info($user, $course);
exit();
}
if ($e) {
page_head("Confirm start");
echo "You are already enrolled in $course->name.
Are you sure you want to start from the beginning?
";
show_button(
"bolt_sched.php?action=start_confirm&course_id=$course->id",
"Yes",
"Start this course from the beginning"
);
page_tail();
exit();
}
case 'start_confirm':
start_course($course_doc);
break;
case 'update_info':
update_info();
start_course($course_doc);
case 'prev':
$view = finalize_view($view_id, BOLT_ACTION_PREV);
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();
$mode = default_mode($iter->item);
$view_id = create_view($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);
$iter = new BoltIter($course_doc);
$iter->decode_state($view->state);
if ($user->bolt->debug) {
echo "Initial state: "; print_r($iter->state); echo "\n"; } $iter->next(); if ($user->bolt->debug) { echo "
Item: "; print_r($iter->item); echo "\n"; } if ($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 { $iter->frac_done = 1; $fin_view_id = create_view($iter, BOLT_MODE_FINISHED, $view_id); $e->update("last_view_id=$fin_view_id"); show_finished_page($fin_view_id, $view->id); } break; case 'answer': // submit answer in exercise $view = finalize_view($view_id, BOLT_ACTION_SUBMIT); $iter = new BoltIter($course_doc); $iter->decode_state($view->state); if ($user->bolt->debug) { echo "
Initial state:"; print_r($iter->state); echo "\n"; } $iter->at(); if ($user->bolt->debug) { echo "
Item: "; print_r($iter->item); echo "\n"; } $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(); // turn on output buffering require($item->filename); ob_end_clean(); $bolt_ex_score /= $bolt_ex_index; // make a record of the result $qs = BoltDb::escape_string($_SERVER['QUERY_STRING']); $result_id = BoltResult::insert( "(view_id, score, response) values ($view->id, $bolt_ex_score, '$qs')" ); $view->update("result_id=$result_id"); // If this is part of an exercise set, call its callback function // if ($iter->xset) { $iter->xset->xset_callback($iter, $bolt_ex_score, $view->id, $is_last, $repeat); } // show the answer page srand($view_id); $view_id = create_view($iter, BOLT_MODE_ANSWER, $view->id); show_item($iter, $view_id, $view->id, BOLT_MODE_ANSWER, $repeat); 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': $view = finalize_view($view_id, BOLT_ACTION_REVIEW); $iter = new BoltIter($course_doc); $iter->decode_state($view->state); $iter->at(); if (!$iter->xset) { echo "NO XSET"; exit; } $xset = $iter->xset; $unit_name = 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': $view = finalize_view($view_id, BOLT_ACTION_REPEAT); $iter = new BoltIter($course_doc); $iter->decode_state($view->state); $iter->at(); if (!$iter->xset) { echo "NO XSET"; exit; } $xset = $iter->xset; $xset->start_repeat($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; default: $view = $e?BoltView::lookup_id($e->last_view_id):null; if (!$view) { start_course($course_doc); 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); echo "reshow: $result->response"; $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; } ?>