mirror of https://github.com/BOINC/boinc.git
82 lines
2.3 KiB
PHP
82 lines
2.3 KiB
PHP
<?php
|
|
// This file is part of BOINC.
|
|
// http://boinc.berkeley.edu
|
|
// Copyright (C) 2008 University of California
|
|
//
|
|
// BOINC is free software; you can redistribute it and/or modify it
|
|
// under the terms of the GNU Lesser General Public License
|
|
// as published by the Free Software Foundation,
|
|
// either version 3 of the License, or (at your option) any later version.
|
|
//
|
|
// BOINC is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
// See the GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
// An iterator represents a user's position in a course.
|
|
// Its state is stored in the database,
|
|
// and the course may change underneath it.
|
|
//
|
|
// A state in a course is described by an associative array
|
|
// mapping logical names to state structures.
|
|
// Typically this includes the logical name of the current child
|
|
// and info such as a sequence index.
|
|
// This is kind of like a "call stack",
|
|
// except that it can contain units not currently active.
|
|
|
|
//
|
|
class BoltIter {
|
|
public $top; // topmost unit
|
|
public $state;
|
|
public $xset; // exercise set, if any
|
|
|
|
// the following are temps
|
|
public $item; // current item
|
|
public $frac_done; // fraction done
|
|
|
|
function __construct($top) {
|
|
$this->top = $top;
|
|
$this->state = array();
|
|
}
|
|
|
|
function decode_state($encoded_state) {
|
|
$this->state = unserialize($encoded_state);
|
|
}
|
|
|
|
function encode_state() {
|
|
return serialize($this->state);
|
|
}
|
|
|
|
// get current item and fraction done
|
|
//
|
|
function at() {
|
|
$this->xset = null;
|
|
$this->top->walk($this, false, $this->frac_done);
|
|
}
|
|
|
|
// move to the next item, and return it in $this->item
|
|
// (null if course finished)
|
|
//
|
|
function next() {
|
|
$this->top->walk($this, true, $this->frac_done);
|
|
}
|
|
}
|
|
|
|
function enum_course($course) {
|
|
$iter = new BoltIter($course);
|
|
while (1) {
|
|
$x = $iter->at();
|
|
if (!$x) break;
|
|
echo "at: $x->url\n";
|
|
$x = $iter->next();
|
|
if (!$x) break;
|
|
echo "next: $x->filename\n";
|
|
}
|
|
echo "course over\n";
|
|
}
|
|
|
|
?>
|