2 /***************************************************************************
3 * Copyright (C) 2003-2008 Polytechnique.org *
4 * http://opensource.polytechnique.org/ *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
20 **************************************************************************/
22 /** A Wizard Page is a page of a wizard. It is a self-contained step which
23 * handles both the creation and initialisation of the step (by using the
24 * Wizard global state, if needed) and the processing of the action the
27 interface PlWizardPage
29 /** Build a new instance of the class
30 * associated with the given wizard master.
32 public function __construct(PlWizard
&$wiz);
34 /** Return the name of the templace describing the page.
36 public function template();
38 /** Prepare the page by assigning to it any useful value.
40 public function prepare(PlPage
&$page, $id);
42 /** Process information resulting of the application of the page.
43 * This function must return a clue indicating the next page to show.
44 * This clue can be either a page id, a page number or a navigation
45 * id (PlWizard::FIRST_PAGE, PlWizard::NEXT_PAGE, PlWizard::CURRENT_PAGE
46 * PlWizard::PREVIOUS_PAGE, PlWizard::LAST_PAGE).
48 public function process();
51 /** A PlWizard is a set of pages through which the user can navigate,
52 * his action on a page determining which the next one will be.
54 * A Wizard can either a stateless wizard (which is only a set of
55 * independent pages through which the user can easily navigate) or
56 * stateful (a suite of steps where each step gives clue for the next
61 const FIRST_PAGE
= 'bt_first';
62 const NEXT_PAGE
= 'bt_next';
63 const CURRENT_PAGE
= 'bt_current';
64 const PREVIOUS_PAGE
= 'bt_previous';
65 const LAST_PAGE
= 'bt_last';
75 protected $inv_lookup;
77 public function __construct($name, $layout, $stateless = false
, $ajax = true
)
79 $this->name
= 'wiz_' . $name;
80 $this->layout
= $layout;
81 $this->stateless
= $stateless;
82 $this->pages
= array();
83 $this->lookup
= array();
84 $this->titles
= array();
86 if (!isset($_SESSION[$this->name
])) {
87 $_SESSION[$this->name
] = array();
88 $_SESSION[$this->name
. '_page'] = null
;
89 $_SESSION[$this->name
. '_stack'] = array();
93 public function addPage($class, $title, $id = null
)
96 $id = count($this->pages
);
98 $this->lookup
[$id] = count($this->pages
);
99 $this->inv_lookup
[] = $id;
100 $this->pages
[] = $class;
101 $this->titles
[] = $title;
104 public function set($varname, $value)
106 $_SESSION[$this->name
][$varname] = $value;
109 public function get($varname, $default = null
)
111 return isset($_SESSION[$this->name
][$varname]) ?
112 $_SESSION[$this->name
][$varname] : $default;
115 public function v($varname, $default = "")
117 return $this->get($varname, $default);
120 public function i($varname, $default = 0)
122 return (int)$this->get($varname, $default);
125 public function clear($varname = null
)
127 if (is_null($varname)) {
128 $_SESSION[$this->name
] = array();
130 unset($_SESSION[$this->name
][$varname]);
132 $_SESSION[$this->name
. '_page'] = null
;
135 private function getPage($id)
137 $page = $this->pages
[$id];
138 return new $page($this);
141 public function apply(PlPage
&$smarty, $baseurl, $pgid = null
, $mode = 'normal')
143 if ($this->stateless
&& (isset($this->lookup
[$pgid]) ||
isset($this->pages
[$pgid]))) {
144 $curpage = is_numeric($pgid) ?
$pgid : $this->lookup
[$pgid];
145 } else if ($this->stateless
&& is_null($pgid)) {
148 $curpage = $_SESSION[$this->name
. '_page'];
152 // Process the previous page
153 if (Post
::has('valid_page')) {
154 S
::assert_xsrf_token();
156 $page = $this->getPage(Post
::i('valid_page'));
157 $curpage = Post
::i('valid_page');
158 $next = $page->process();
161 case PlWizard
::FIRST_PAGE
:
164 case PlWizard
::PREVIOUS_PAGE
:
165 if (!$this->stateless
&& count($_SESSION[$this->name
. '_stack'])) {
166 $curpage = array_pop($_SESSION[$this->name
. '_stack']);
167 } elseif ($curpage && $this->stateless
) {
173 case PlWizard
::NEXT_PAGE
:
174 if ($curpage < count($this->pages
) - 1) {
178 case PlWizard
::LAST_PAGE
:
179 $curpage = count($this->pages
) - 1;
181 case PlWizard
::CURRENT_PAGE
: break; // don't change the page
183 $curpage = is_numeric($next) ?
$next : $this->lookup
[$next];
186 if (!$this->stateless
) {
187 array_push($_SESSION[$this->name
. '_stack'], $last);
190 if (is_null($curpage)) {
195 $_SESSION[$this->name
. '_page'] = $curpage;
196 if ($curpage != $oldpage) {
197 pl_redirect($baseurl . '/' . $this->inv_lookup
[$curpage]);
198 } else if (!isset($page)) {
199 $page = $this->getPage($curpage);
201 if ($mode == 'ajax') {
202 header('Content-Type: text/html; charset=utf-8');
203 $smarty->changeTpl($page->template(), NO_SKIN
);
205 $smarty->changeTpl($this->layout
);
207 $smarty->assign('pages', $this->titles
);
208 $smarty->assign('current', $curpage);
209 $smarty->assign('lookup', $this->inv_lookup
);
210 $smarty->assign('stateless', $this->stateless
);
211 $smarty->assign('wiz_baseurl', $baseurl);
212 $smarty->assign('wiz_ajax', $this->ajax
);
213 $smarty->assign('tab_width', (int)(99 / count($this->pages
)));
214 $smarty->assign('wiz_page', $page->template());
215 $smarty->assign('pl_no_errors', true
);
216 $page->prepare($smarty, isset($this->inv_lookup
[$curpage]) ?
$this->inv_lookup
[$curpage] : $curpage);
220 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8: