* Link: http://trac.shishnet.org/shimmie2/
* License: GPLv2
* Description: A simple wiki, for those who don't want the
* hugeness of mediawiki
*/
// WikiUpdateEvent {{{
class WikiUpdateEvent extends Event {
var $user;
var $page;
public function WikiUpdateEvent($user, $page) {
$this->user = $user;
$this->page = $page;
}
}
// }}}
// WikiPage {{{
class WikiPage {
var $id;
var $owner_id;
var $owner_ip;
var $date;
var $title;
var $revision;
var $locked;
var $body;
public function WikiPage($row=null) {
if(!is_null($row)) {
$this->id = $row['id'];
$this->owner_id = $row['owner_id'];
$this->owner_ip = $row['owner_ip'];
$this->date = $row['date'];
$this->title = $row['title'];
$this->revision = $row['revision'];
$this->locked = ($row['locked'] == 'Y');
$this->body = $row['body'];
}
}
public function get_owner() {
global $database;
return $database->get_user_by_id($this->owner_id);
}
public function is_locked() {
return $this->locked;
}
}
// }}}
class Wiki extends Extension {
// event handler {{{
public function receive_event($event) {
if(is_a($event, 'InitExtEvent')) {
$this->setup();
}
if(is_a($event, 'PageRequestEvent') && ($event->page == "wiki")) {
global $page;
$page->add_block(new NavBlock());
if(is_null($event->get_arg(0)) || strlen(trim($event->get_arg(0))) == 0) {
$title = "Index";
}
else {
$title = $event->get_arg(0);
}
$page->set_title(html_escape($title));
$page->set_heading(html_escape($title));
$content = $this->get_page($title);
if(isset($_GET['save']) && $_GET['save'] == "on") {
$title = $_POST['title'];
$rev = int_escape($_POST['revision']);
$body = $_POST['body'];
$lock = isset($_POST['lock']) && ($_POST['lock'] == "on");
global $user;
if($this->can_edit($user, $this->get_page($title))) {
if($user->is_admin()) {
$this->set_page($title, $rev, $body, $lock);
}
else {
$this->set_page($title, $rev, $body, false);
}
$u_title = url_escape($title);
global $page;
$page->set_mode("redirect");
$page->set_redirect(make_link("wiki/$u_title"));
}
else {
global $page;
$page->set_title("Denied");
$page->set_heading("Denied");
$page->add_block(new NavBlock());
$page->add_block(new Block("Denied", "You do not have permission to edit this page"));
}
}
else if(is_null($content)) {
$default = $this->get_page("wiki:default");
$blank = new WikiPage();
$blank->title = $title;
if(!is_null($default) && !isset($_GET['edit'])) {
global $config;
$blank->body = $default->body;
$blank->owner_id = $config->get_int('anon_id');
$blank->date = $default->date;
$content = $this->create_display_html($blank);
}
else {
$content = $this->create_edit_html($blank);
}
$page->add_block(new Block("Content", $content));
}
else if(isset($_GET['edit']) && $_GET['edit'] == "on") {
$page->add_block(new Block("Content", $this->create_edit_html($content)));
}
else {
$page->add_block(new Block("Content", $this->create_display_html($content)));
}
}
if(is_a($event, 'WikiUpdateEvent')) {
$this->update_wiki_page($event->user, $event->page);
}
if(is_a($event, 'SetupBuildingEvent')) {
$sb = new SetupBlock("Wiki");
$sb->add_bool_option("wiki_edit_anon", "Allow anonymous edits: ");
$sb->add_bool_option("wiki_edit_user", "
Allow user edits: ");
$event->panel->add_block($sb);
}
}
// }}}
// misc {{{
private function can_edit($user, $page) {
global $config;
if(!is_null($page) && $page->is_locked() && !$user->is_admin()) return false;
if($config->get_bool("wiki_edit_anon", false) && $user->is_anonymous()) return true;
if($config->get_bool("wiki_edit_user", false) && !$user->is_anonymous()) return true;
if($user->is_admin()) return true;
return false;
}
// }}}
// installer {{{
private function setup() {
global $database;
global $config;
if($config->get_int("ext_wiki_version", 0) < 1) {
$database->Execute("CREATE TABLE wiki_pages (
id int(11) NOT NULL auto_increment,
owner_id int(11) NOT NULL,
owner_ip char(15) NOT NULL,
date datetime default NULL,
title varchar(255) NOT NULL,
revision int(11) NOT NULL default 1,
body text NOT NULL,
PRIMARY KEY (id), UNIQUE (title, revision)
)");
$config->set_int("ext_wiki_version", 1);
}
if($config->get_int("ext_wiki_version") < 2) {
$database->Execute("ALTER TABLE wiki_pages ADD COLUMN
locked ENUM('Y', 'N') DEFAULT 'N' NOT NULL AFTER REVISION");
$config->set_int("ext_wiki_version", 2);
}
}
// }}}
// database {{{
private function get_page($title, $revision=-1) {
global $database;
$row = $database->db->GetRow("
SELECT *
FROM wiki_pages
WHERE title LIKE ?
ORDER BY revision DESC", array($title));
return ($row ? new WikiPage($row) : null);
}
private function set_page($title, $rev, $body, $locked) {
global $database;
global $user;
// FIXME: deal with collisions
$row = $database->Execute("
INSERT INTO wiki_pages(owner_id, owner_ip, date, title, revision, locked, body)
VALUES (?, ?, now(), ?, ?, ?, ?)", array($user->id, $_SERVER['REMOTE_ADDR'], $title, $rev, $locked?'Y':'N', $body));
}
// }}}
// html {{{
private function create_edit_html($page) {
$h_title = html_escape($page->title);
$u_title = url_escape($page->title);
$i_revision = int_escape($page->revision) + 1;
global $user;
if($user->is_admin()) {
$val = $page->is_locked() ? " checked" : "";
$lock = "
Lock page: ";
}
else {
$lock = "";
}
return "
";
}
private function create_display_html($page) {
$owner = $page->get_owner();
$tfe = new TextFormattingEvent($page->body);
send_event($tfe);
$html = "";
$html .= $tfe->formatted;
$html .= "
";
$html .= "";
return $html;
}
// }}}
}
add_event_listener(new Wiki());
?>