bolt->update("sex=$sex, birth_year=$birth_year"); } $course_doc = require_once($course->doc_file); function finalize_view($user, $view_id) { if (!$view_id) return null; $view = BoltView::lookup_id($view_id); if ($view && $view->user_id == $user->id && !$view->end_time) { $now = time(); $view->update("end_time=$now"); } return $view; } function start_course($user, $course, $course_doc) { $iter = new BoltIter($course_doc); $x = $iter->at(); $now = time(); $state = json_encode($iter->stack); BoltEnrollment::insert("(create_time, user_id, course_id, state) values ($now, $user->id, $course->id, '$state')"); $e = BoltEnrollment::lookup($user->id, $course->id); $e->update("state='$state'"); show_item($x->item, 0, $user, $course, $e); } function get_current_item($e, $course_doc) { $frac_done = 0; $iter = new BoltIter($course_doc); $iter->stack = json_decode($e->state); return $iter->at(); } function get_next_item($e, $course_doc) { $frac_done = 0; $iter = new BoltIter($course_doc); $iter->stack = json_decode($e->state); $ret = $iter->next(); $state = json_encode($iter->stack); $e->update("state='$state'"); return $ret; } function show_item($item, $frac_done, $user, $course, $e) { $now = time(); $e->update("last_view=$now, fraction_done=$frac_done"); $view_id = BoltView::insert("(user_id, course_id, item_name, start_time) values ($user->id, $course->id, '$item->name', $now)"); if ($item->is_exercise()) { $bolt_ex_mode = BOLT_MODE_SHOW; $bolt_ex_index = 0; echo "

id> "; require($item->filename); echo "

"; } else { require_once($item->filename); echo "

id&action=next&view_id=$view_id>Next"; } echo "

Fraction done: $frac_done"; } switch ($action) { case 'start': if (info_incomplete($user)) { request_info($user, $course); exit(); } start_course($user, $course, $course_doc); break; case 'update_info': update_info(); start_course($user, $course, $course_doc); case 'next': // "next" button in lesson or exercise answer page $view = finalize_view($user, $view_id); $e = BoltEnrollment::lookup($user->id, $course_id); $x = get_next_item($e, $course_doc); if (!$x->item) { page_head("Done with course"); echo "All done!"; page_tail(); exit(); } show_item($x->item, $x->frac_done, $user, $course, $e); break; case 'answer': // submit answer in exercise $e = BoltEnrollment::lookup($user->id, $course_id); $view = finalize_view($user, $view_id); $x = get_current_item($e, $course_doc); $item = $x->item; if (!$item->is_exercise()) { error_page("expected an exercise"); } if ($view->item_name != $item->name) { error_page("unexpected name"); } $bolt_ex_mode = BOLT_MODE_SCORE; $bolt_ex_index = 0; $bolt_ex_score = 0; ob_start(); // turn on output buffering require($item->filename); ob_end_clean(); echo "score: $bolt_ex_score"; $bolt_ex_mode = BOLT_MODE_ANSWER; $bolt_ex_index = 0; require($item->filename); break; } ?>