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gnu-social/lib/action.php

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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* Base class for all actions (~views)
*
* PHP version 5
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Action
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @author Sarven Capadisli <csarven@controlyourself.ca>
* @copyright 2008 Control Yourself, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
if (!defined('LACONICA')) {
exit(1);
}
/**
* Base class for all actions
*
* This is the base class for all actions in the package. An action is
* more or less a "view" in an MVC framework.
*
* Actions are responsible for extracting and validating parameters; using
* model classes to read and write to the database; and doing ouput.
*
* @category Output
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @author Sarven Capadisli <csarven@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*
* @see HTMLOutputter
*/
class Action extends HTMLOutputter // lawsuit
{
var $args;
function Action()
{
}
// For initializing members of the class
function prepare($argarray)
{
$this->args =& common_copy_args($argarray);
return true;
}
function showPage()
{
$this->startHTML();
$this->showHead();
$this->showBody();
$this->endHTML();
}
function showHead()
{
// XXX: attributes (profile?)
$this->startElement('head');
$this->showTitle();
$this->showStylesheets();
$this->showScripts();
$this->showOpenSearch();
$this->showFeeds();
$this->showDescription();
$this->extraHead();
$this->elementElement('head');
}
function showTitle()
{
$this->element('title', null,
sprintf(_("%s - %s"),
$this->title(),
common_config('site', 'name')));
}
// SHOULD overload
function title()
{
return _("Untitled page");
}
function showStylesheets()
{
common_element('link', array('rel' => 'stylesheet',
'type' => 'text/css',
'href' => theme_path('display.css') . '?version=' . LACONICA_VERSION,
'media' => 'screen, projection, tv'));
foreach (array(6,7) as $ver) {
if (file_exists(theme_file('ie'.$ver.'.css'))) {
// Yes, IE people should be put in jail.
$xw->writeComment('[if lte IE '.$ver.']><link rel="stylesheet" type="text/css" '.
'href="'.theme_path('ie'.$ver.'.css').'?version='.LACONICA_VERSION.'" /><![endif]');
}
}
}
function showScripts()
{
common_element('script', array('type' => 'text/javascript',
'src' => common_path('js/jquery.min.js')),
' ');
common_element('script', array('type' => 'text/javascript',
'src' => common_path('js/jquery.form.js')),
' ');
common_element('script', array('type' => 'text/javascript',
'src' => common_path('js/xbImportNode.js')),
' ');
common_element('script', array('type' => 'text/javascript',
'src' => common_path('js/util.js?version='.LACONICA_VERSION)),
' ');
}
function showOpenSearch()
{
common_element('link', array('rel' => 'search', 'type' => 'application/opensearchdescription+xml',
'href' => common_local_url('opensearch', array('type' => 'people')),
'title' => common_config('site', 'name').' People Search'));
common_element('link', array('rel' => 'search', 'type' => 'application/opensearchdescription+xml',
'href' => common_local_url('opensearch', array('type' => 'notice')),
'title' => common_config('site', 'name').' Notice Search'));
}
// MAY overload
function showFeeds()
{
// does nothing by default
}
// SHOULD overload
function showDescription()
{
// does nothing by default
}
// MAY overload
function extraHead()
{
// does nothing by default
}
function showBody()
{
// output body
// output wrap element
$this->showHeader();
$this->showCore();
$this->showFooter();
}
function showHeader()
{
// start header div stuff
$this->showLogo();
$this->showPrimaryNav();
$this->showSiteNotice();
$this->showNoticeForm();
// end header div stuff
}
function showLogo()
{
// show the logo here
}
function showPrimaryNav()
{
$user = common_current_user();
common_element_start('ul', array('id' => 'nav'));
if ($user) {
common_menu_item(common_local_url('all', array('nickname' => $user->nickname)),
_('Home'));
}
common_menu_item(common_local_url('peoplesearch'), _('Search'));
if ($user) {
common_menu_item(common_local_url('profilesettings'),
_('Settings'));
common_menu_item(common_local_url('invite'),
_('Invite'));
common_menu_item(common_local_url('logout'),
_('Logout'));
} else {
common_menu_item(common_local_url('login'), _('Login'));
if (!common_config('site', 'closed')) {
common_menu_item(common_local_url('register'), _('Register'));
}
common_menu_item(common_local_url('openidlogin'), _('OpenID'));
}
common_menu_item(common_local_url('doc', array('title' => 'help')),
_('Help'));
common_element_end('ul');
}
function showSiteNotice()
{
// show the site notice here
}
// MAY overload if no notice form needed... or direct message box????
function showNoticeForm()
{
// show the notice form here
}
function showCore()
{
// start core div
$this->showLocalNav();
$this->showContentBlock();
$this->showAside();
// end core div
}
// SHOULD overload
function showLocalNav()
{
}
function showContentBlock()
{
$this->showPageTitle();
$this->showPageNotice();
$this->showContent();
}
function showPageTitle() {
$this->element('h1', NULL, $this->title());
}
// SHOULD overload (unless there's not a notice)
function showPageNotice()
{
// output page notice div
}
// MUST overload
function showContent()
{
// show the actual content (forms, lists, whatever)
}
function showAside()
{
$this->showExportData();
$this->showSections();
}
// MAY overload if there are feeds
function showExportData()
{
// is there structure to this?
// list of (visible!) feed links
// can we reuse list of feeds from showFeeds() ?
}
// SHOULD overload
function showSections() {
// for each section, show it
}
function showFooter()
{
// start footer div
$this->showSecondaryNav();
$this->showLicenses();
}
function showSecondaryNav()
{
common_element_start('ul', array('id' => 'nav_sub'));
common_menu_item(common_local_url('doc', array('title' => 'help')),
_('Help'));
common_menu_item(common_local_url('doc', array('title' => 'about')),
_('About'));
common_menu_item(common_local_url('doc', array('title' => 'faq')),
_('FAQ'));
common_menu_item(common_local_url('doc', array('title' => 'privacy')),
_('Privacy'));
common_menu_item(common_local_url('doc', array('title' => 'source')),
_('Source'));
common_menu_item(common_local_url('doc', array('title' => 'contact')),
_('Contact'));
common_element_end('ul');
}
function showLicenses()
{
// start license dl
$this->showLaconicaLicense();
$this->showContentLicense();
// end license dl
}
function showLaconicaLicense()
{
common_element_start('div', 'laconica');
if (common_config('site', 'broughtby')) {
$instr = _('**%%site.name%%** is a microblogging service brought to you by [%%site.broughtby%%](%%site.broughtbyurl%%). ');
} else {
$instr = _('**%%site.name%%** is a microblogging service. ');
}
$instr .= sprintf(_('It runs the [Laconica](http://laconi.ca/) microblogging software, version %s, available under the [GNU Affero General Public License](http://www.fsf.org/licensing/licenses/agpl-3.0.html).'), LACONICA_VERSION);
$output = common_markup_to_html($instr);
common_raw($output);
common_element_end('div');
// do it
}
function showContentLicense()
{
common_element_start('div', array('id' => 'footer'));
common_element('img', array('id' => 'cc',
'src' => $config['license']['image'],
'alt' => $config['license']['title']));
common_element_start('p');
common_text(_('Unless otherwise specified, contents of this site are copyright by the contributors and available under the '));
common_element('a', array('class' => 'license',
'rel' => 'license',
'href' => $config['license']['url']),
$config['license']['title']);
common_text(_('. Contributors should be attributed by full name or nickname.'));
common_element_end('p');
common_element_end('div');
}
// For comparison with If-Last-Modified
// If not applicable, return null
function last_modified()
{
return null;
}
function etag()
{
return null;
}
function is_readonly()
{
return false;
}
function arg($key, $def=null)
{
if (array_key_exists($key, $this->args)) {
return $this->args[$key];
} else {
return $def;
}
}
function trimmed($key, $def=null)
{
$arg = $this->arg($key, $def);
return (is_string($arg)) ? trim($arg) : $arg;
}
// Note: argarray ignored, since it's now passed in in prepare()
function handle($argarray=null)
{
$lm = $this->last_modified();
$etag = $this->etag();
if ($etag) {
header('ETag: ' . $etag);
}
if ($lm) {
header('Last-Modified: ' . date(DATE_RFC1123, $lm));
$if_modified_since = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
if ($if_modified_since) {
$ims = strtotime($if_modified_since);
if ($lm <= $ims) {
if (!$etag ||
$this->_has_etag($etag, $_SERVER['HTTP_IF_NONE_MATCH'])) {
header('HTTP/1.1 304 Not Modified');
// Better way to do this?
exit(0);
}
}
}
}
}
function _has_etag($etag, $if_none_match)
{
return ($if_none_match) && in_array($etag, explode(',', $if_none_match));
}
function boolean($key, $def=false)
{
$arg = strtolower($this->trimmed($key));
if (is_null($arg)) {
return $def;
} else if (in_array($arg, array('true', 'yes', '1'))) {
return true;
} else if (in_array($arg, array('false', 'no', '0'))) {
return false;
} else {
return $def;
}
}
function server_error($msg, $code=500)
{
$action = $this->trimmed('action');
common_debug("Server error '$code' on '$action': $msg", __FILE__);
common_server_error($msg, $code);
}
function client_error($msg, $code=400)
{
$action = $this->trimmed('action');
common_debug("User error '$code' on '$action': $msg", __FILE__);
common_user_error($msg, $code);
}
function self_url()
{
$action = $this->trimmed('action');
$args = $this->args;
unset($args['action']);
foreach (array_keys($_COOKIE) as $cookie) {
unset($args[$cookie]);
}
return common_local_url($action, $args);
}
function nav_menu($menu)
{
$action = $this->trimmed('action');
common_element_start('ul', array('id' => 'nav_views'));
foreach ($menu as $menuaction => $menudesc) {
common_menu_item(common_local_url($menuaction,
isset($menudesc[2]) ? $menudesc[2] : null),
$menudesc[0],
$menudesc[1],
$action == $menuaction);
}
common_element_end('ul');
}
function common_show_header($pagetitle, $callable=null, $data=null, $headercall=null)
{
global $config, $xw;
global $action; /* XXX: kind of cheating here. */
common_start_html();
common_element_start('head');
if ($callable) {
if ($data) {
call_user_func($callable, $data);
} else {
call_user_func($callable);
}
}
common_element_end('head');
common_element_start('body', $action);
common_element_start('div', array('id' => 'wrap'));
common_element_start('div', array('id' => 'header'));
common_nav_menu();
if ((isset($config['site']['logo']) && is_string($config['site']['logo']) && (strlen($config['site']['logo']) > 0))
|| file_exists(theme_file('logo.png')))
{
common_element_start('a', array('href' => common_local_url('public')));
common_element('img', array('src' => isset($config['site']['logo']) ?
($config['site']['logo']) : theme_path('logo.png'),
'alt' => $config['site']['name'],
'id' => 'logo'));
common_element_end('a');
} else {
common_element_start('p', array('id' => 'branding'));
common_element('a', array('href' => common_local_url('public')),
$config['site']['name']);
common_element_end('p');
}
common_element('h1', 'pagetitle', $pagetitle);
if ($headercall) {
if ($data) {
call_user_func($headercall, $data);
} else {
call_user_func($headercall);
}
}
common_element_end('div');
common_element_start('div', array('id' => 'content'));
}
function common_show_footer()
{
global $xw, $config;
common_element_end('div'); // content div
common_foot_menu();
common_element_end('div');
common_element_end('body');
common_element_end('html');
common_end_xml();
}
function common_menu_item($url, $text, $title=null, $is_selected=false)
{
$lattrs = array();
if ($is_selected) {
$lattrs['class'] = 'current';
}
common_element_start('li', $lattrs);
$attrs['href'] = $url;
if ($title) {
$attrs['title'] = $title;
}
common_element('a', $attrs, $text);
common_element_end('li');
}
}
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