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);
}
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require_once INSTALLDIR.'/lib/noticeform.php';
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require_once INSTALLDIR.'/lib/htmloutputter.php';
/**
* 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;
/**
* Constructor
*
* Just wraps the HTMLOutputter constructor.
*
* @param string $output URI to output to, default = stdout
* @param boolean $indent Whether to indent output, default true
*
* @see XMLOutputter::__construct
* @see HTMLOutputter::__construct
*/
function __construct($output='php://output', $indent=true)
{
parent::__construct($output, $indent);
}
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/**
* For initializing members of the class.
*
* @param array $argarray misc. arguments
*
* @return boolean true
*/
function prepare($argarray)
{
$this->args =& common_copy_args($argarray);
return true;
}
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/**
* Show page, a template method.
*
* @return nothing
*/
function showPage()
{
$this->startHTML();
$this->showHead();
$this->showBody();
$this->endHTML();
}
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/**
* Show head, a template method.
*
* @return nothing
*/
function showHead()
{
// XXX: attributes (profile?)
$this->elementStart('head');
$this->showTitle();
$this->showStylesheets();
$this->showScripts();
$this->showOpenSearch();
$this->showFeeds();
$this->showDescription();
$this->extraHead();
$this->elementEnd('head');
}
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/**
* Show title, a template method.
*
* @return nothing
*/
function showTitle()
{
$this->element('title', null,
sprintf(_("%s - %s"),
$this->title(),
common_config('site', 'name')));
}
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/**
* Returns the page title
*
* SHOULD overload
*
* @return string page title
*/
function title()
{
return _("Untitled page");
}
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/**
* Show stylesheets
*
* @return nothing
*/
function showStylesheets()
{
$this->element('link', array('rel' => 'stylesheet',
'type' => 'text/css',
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'href' => theme_path('css/display.css', 'base') . '?version=' . LACONICA_VERSION,
'media' => 'screen, projection, tv'));
$this->element('link', array('rel' => 'stylesheet',
'type' => 'text/css',
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'href' => theme_path('css/display.css', null) . '?version=' . LACONICA_VERSION,
'media' => 'screen, projection, tv'));
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$this->comment('[if IE]><link rel="stylesheet" type="text/css" '.
'href="'.theme_path('css/ie.css', 'base').'?version='.LACONICA_VERSION.'" /><![endif]');
foreach (array(6,7) as $ver) {
if (file_exists(theme_file('css/ie'.$ver.'.css', 'base'))) {
// Yes, IE people should be put in jail.
$this->comment('[if lte IE '.$ver.']><link rel="stylesheet" type="text/css" '.
'href="'.theme_path('css/ie'.$ver.'.css', 'base').'?version='.LACONICA_VERSION.'" /><![endif]');
}
}
$this->comment('[if IE]><link rel="stylesheet" type="text/css" '.
'href="'.theme_path('css/ie.css', null).'?version='.LACONICA_VERSION.'" /><![endif]');
}
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/**
* Show javascript headers
*
* @return nothing
*/
function showScripts()
{
$this->element('script', array('type' => 'text/javascript',
'src' => common_path('js/jquery.min.js')),
' ');
$this->element('script', array('type' => 'text/javascript',
'src' => common_path('js/jquery.form.js')),
' ');
$this->element('script', array('type' => 'text/javascript',
'src' => common_path('js/xbImportNode.js')),
' ');
$this->element('script', array('type' => 'text/javascript',
'src' => common_path('js/util.js?version='.LACONICA_VERSION)),
' ');
}
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/**
* Show OpenSearch headers
*
* @return nothing
*/
function showOpenSearch()
{
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$this->element('link', array('rel' => 'search',
'type' => 'application/opensearchdescription+xml',
'href' => common_local_url('opensearch', array('type' => 'people')),
'title' => common_config('site', 'name').' People Search'));
$this->element('link', array('rel' => 'search', 'type' => 'application/opensearchdescription+xml',
'href' => common_local_url('opensearch', array('type' => 'notice')),
'title' => common_config('site', 'name').' Notice Search'));
}
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/**
* Show feed headers
*
* MAY overload
*
* @return nothing
*/
function showFeeds()
{
// does nothing by default
}
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/**
* Show description.
*
* SHOULD overload
*
* @return nothing
*/
function showDescription()
{
// does nothing by default
}
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/**
* Show extra stuff in <head>.
*
* MAY overload
*
* @return nothing
*/
function extraHead()
{
// does nothing by default
}
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/**
* Show body.
*
* Calls template methods
*
* @return nothing
*/
function showBody()
{
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$this->elementStart('body', array('id' => $this->trimmed('action')));
$this->elementStart('div', array('id' => 'wrap'));
$this->showHeader();
$this->showCore();
$this->showFooter();
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$this->elementEnd('div');
$this->elementEnd('body');
}
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/**
* Show header of the page.
*
* Calls template methods
*
* @return nothing
*/
function showHeader()
{
$this->elementStart('div', array('id' => 'header'));
$this->showLogo();
$this->showPrimaryNav();
$this->showSiteNotice();
if (common_logged_in()) {
$this->showNoticeForm();
} else {
$this->showAnonymousMessage();
}
$this->elementEnd('div');
}
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/**
* Show configured logo.
*
* @return nothing
*/
function showLogo()
{
$this->elementStart('address', array('id' => 'site_contact',
'class' => 'vcard'));
$this->elementStart('a', array('class' => 'url home bookmark',
'href' => common_local_url('public')));
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if (common_config('site', 'logo') || file_exists(theme_file('logo.png'))) {
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$this->element('img', array('class' => 'logo photo',
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'src' => (common_config('site', 'logo')) ? common_config('site', 'logo') : theme_path('logo.png'),
'alt' => common_config('site', 'name')));
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}
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$this->element('span', array('class' => 'fn org'), common_config('site', 'name'));
$this->elementEnd('a');
$this->elementEnd('address');
}
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/**
* Show primary navigation.
*
* @return nothing
*/
function showPrimaryNav()
{
$this->elementStart('dl', array('id' => 'site_nav_global_primary'));
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$this->element('dt', null, _('Primary site navigation'));
$this->elementStart('dd');
$user = common_current_user();
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$this->elementStart('ul', array('class' => 'nav'));
if ($user) {
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$this->menuItem(common_local_url('all', array('nickname' => $user->nickname)),
_('Home'), _('Personal profile and friends timeline'), false, 'nav_home');
}
$this->menuItem(common_local_url('peoplesearch'),
_('Search'), _('Search for people or text'), false, 'nav_search');
if ($user) {
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$this->menuItem(common_local_url('profilesettings'),
_('Account'), _('Change your email, avatar, password, profile'), false, 'nav_account');
if (common_config('xmpp', 'enabled')) {
$this->menuItem(common_local_url('imsettings'),
_('Connect'), _('Connect to IM, SMS, Twitter'), false, 'nav_connect');
} else {
$this->menuItem(common_local_url('smssettings'),
_('Connect'), _('Connect to SMS, Twitter'), false, 'nav_connect');
}
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$this->menuItem(common_local_url('logout'),
_('Logout'), _('Logout from the site'), false, 'nav_logout');
} else {
$this->menuItem(common_local_url('login'),
_('Login'), _('Login to the site'), false, 'nav_login');
if (!common_config('site', 'closed')) {
$this->menuItem(common_local_url('register'),
_('Register'), _('Create an account'), false, 'nav_register');
}
$this->menuItem(common_local_url('openidlogin'),
_('OpenID'), _('Login with OpenID'), false, 'nav_openid');
}
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$this->menuItem(common_local_url('doc', array('title' => 'help')),
_('Help'), _('Help me!'), false, 'nav_help');
$this->elementEnd('ul');
$this->elementEnd('dd');
$this->elementEnd('dl');
}
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/**
* Show site notice.
*
* @return nothing
*/
function showSiteNotice()
{
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// Revist. Should probably do an hAtom pattern here
$text = common_config('site', 'notice');
if ($text) {
$this->elementStart('dl', array('id' => 'site_notice',
'class' => 'system_notice'));
$this->element('dt', null, _('Site notice'));
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$this->elementStart('dd', null);
$this->raw($text);
$this->elementEnd('dd');
$this->elementEnd('dl');
}
}
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/**
* Show notice form.
*
* MAY overload if no notice form needed... or direct message box????
*
* @return nothing
*/
function showNoticeForm()
{
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$notice_form = new NoticeForm($this);
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$notice_form->show();
}
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/**
* Show anonymous message.
*
* SHOULD overload
*
* @return nothing
*/
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function showAnonymousMessage()
{
// needs to be defined by the class
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}
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/**
* Show core.
*
* Shows local navigation, content block and aside.
*
* @return nothing
*/
function showCore()
{
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$this->elementStart('div', array('id' => 'core'));
$this->showLocalNavBlock();
$this->showContentBlock();
$this->showAside();
$this->elementEnd('div');
}
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/**
* Show local navigation block.
*
* @return nothing
*/
function showLocalNavBlock()
{
$this->elementStart('dl', array('id' => 'site_nav_local_views'));
$this->element('dt', null, _('Local views'));
$this->elementStart('dd');
$this->showLocalNav();
$this->elementEnd('dd');
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$this->elementEnd('dl');
}
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/**
* Show local navigation.
*
* SHOULD overload
*
* @return nothing
*/
function showLocalNav()
{
// does nothing by default
}
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/**
* Show content block.
*
* @return nothing
*/
function showContentBlock()
{
$this->elementStart('div', array('id' => 'content'));
$this->showPageTitle();
$this->showPageNoticeBlock();
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$this->elementStart('div', array('id' => 'content_inner'));
// show the actual content (forms, lists, whatever)
$this->showContent();
$this->elementEnd('div');
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$this->elementEnd('div');
}
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/**
* Show page title.
*
* @return nothing
*/
function showPageTitle()
{
$this->element('h1', null, $this->title());
}
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/**
* Show page notice block.
*
* @return nothing
*/
function showPageNoticeBlock()
{
$this->elementStart('dl', array('id' => 'page_notice',
'class' => 'system_notice'));
$this->element('dt', null, _('Page notice'));
$this->elementStart('dd');
$this->showPageNotice();
$this->elementEnd('dd');
$this->elementEnd('dl');
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}
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/**
* Show page notice.
*
* SHOULD overload (unless there's not a notice)
*
* @return nothing
*/
function showPageNotice()
{
}
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/**
* Show content.
*
* MUST overload (unless there's not a notice)
*
* @return nothing
*/
function showContent()
{
}
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/**
* Show Aside.
*
* @return nothing
*/
function showAside()
{
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$this->elementStart('div', array('id' => 'aside_primary',
'class' => 'aside'));
$this->showExportData();
$this->showSections();
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$this->elementEnd('div');
}
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/**
* Show export data feeds.
*
* MAY overload if there are feeds
*
* @return nothing
*/
function showExportData()
{
// is there structure to this?
// list of (visible!) feed links
// can we reuse list of feeds from showFeeds() ?
}
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/**
* Show sections.
*
* SHOULD overload
*
* @return nothing
*/
function showSections()
{
// for each section, show it
}
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/**
* Show footer.
*
* @return nothing
*/
function showFooter()
{
$this->elementStart('div', array('id' => 'footer'));
$this->showSecondaryNav();
$this->showLicenses();
$this->elementEnd('div');
}
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/**
* Show secondary navigation.
*
* @return nothing
*/
function showSecondaryNav()
{
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$this->elementStart('dl', array('id' => 'site_nav_global_secondary'));
$this->element('dt', null, _('Secondary site navigation'));
$this->elementStart('dd', null);
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$this->elementStart('ul', array('class' => 'nav'));
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$this->menuItem(common_local_url('doc', array('title' => 'help')),
_('Help'));
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$this->menuItem(common_local_url('doc', array('title' => 'about')),
_('About'));
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$this->menuItem(common_local_url('doc', array('title' => 'faq')),
_('FAQ'));
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$this->menuItem(common_local_url('doc', array('title' => 'privacy')),
_('Privacy'));
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$this->menuItem(common_local_url('doc', array('title' => 'source')),
_('Source'));
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$this->menuItem(common_local_url('doc', array('title' => 'contact')),
_('Contact'));
$this->elementEnd('ul');
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$this->elementEnd('dd');
$this->elementEnd('dl');
}
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/**
* Show licenses.
*
* @return nothing
*/
function showLicenses()
{
$this->elementStart('dl', array('id' => 'licenses'));
$this->showLaconicaLicense();
$this->showContentLicense();
$this->elementEnd('dl');
}
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/**
* Show Laconica license.
*
* @return nothing
*/
function showLaconicaLicense()
{
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$this->element('dt', array('id' => 'site_laconica_license'), _('Laconica software license'));
$this->elementStart('dd', null);
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);
$this->raw($output);
$this->elementEnd('dd');
// do it
}
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/**
* Show content license.
*
* @return nothing
*/
function showContentLicense()
{
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$this->element('dt', array('id' => 'site_content_license'), _('Laconica software license'));
$this->elementStart('dd', array('id' => 'site_content_license_cc'));
$this->elementStart('p');
$this->element('img', array('id' => 'license_cc',
'src' => common_config('license', 'image'),
'alt' => common_config('license', 'title')));
//TODO: This is dirty: i18n
$this->text(_('All '.common_config('site', 'name').' content and data are available under the '));
$this->element('a', array('class' => 'license',
'rel' => 'external license',
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'href' => common_config('license', 'url')),
common_config('license', 'title'));
$this->text(_('license.'));
$this->elementEnd('p');
$this->elementEnd('dd');
}
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/**
* Return last modified, if applicable.
*
* MAY override
*
* @return string last modified http header
*/
function lastModified()
{
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// For comparison with If-Last-Modified
// If not applicable, return null
return null;
}
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/**
* Return etag, if applicable.
*
* MAY override
*
* @return string etag http header
*/
function etag()
{
return null;
}
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/**
* Return true if read only.
*
* MAY override
*
* @return boolean is read only action?
*/
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function isReadOnly()
{
return false;
}
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/**
* Returns query argument or default value if not found
*
* @param string $key requested argument
* @param string $def default value to return if $key is not provided
*
* @return boolean is read only action?
*/
function arg($key, $def=null)
{
if (array_key_exists($key, $this->args)) {
return $this->args[$key];
} else {
return $def;
}
}
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/**
* Returns trimmed query argument or default value if not found
*
* @param string $key requested argument
* @param string $def default value to return if $key is not provided
*
* @return boolean is read only action?
*/
function trimmed($key, $def=null)
{
$arg = $this->arg($key, $def);
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return is_string($arg) ? trim($arg) : $arg;
}
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/**
* Handler method
*
* @param array $argarray is ignored since it's now passed in in prepare()
*
* @return boolean is read only action?
*/
function handle($argarray=null)
{
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$lm = $this->lastModified();
$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 ||
$this->_hasEtag($etag, $_SERVER['HTTP_IF_NONE_MATCH'])) {
header('HTTP/1.1 304 Not Modified');
// Better way to do this?
exit(0);
}
}
}
}
}
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/**
* Has etag? (private)
*
* @param string $etag etag http header
* @param string $if_none_match ifNoneMatch http header
*
* @return boolean
*/
function _hasEtag($etag, $if_none_match)
{
return ($if_none_match) && in_array($etag, explode(',', $if_none_match));
}
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/**
* Boolean understands english (yes, no, true, false)
*
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* @param string $key query key we're interested in
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* @param string $def default value
*
* @return boolean interprets yes/no strings as boolean
*/
function boolean($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;
}
}
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/**
* Server error
*
* @param string $msg error message to display
* @param integer $code http error code, 500 by default
*
* @return nothing
*/
function serverError($msg, $code=500)
{
$action = $this->trimmed('action');
common_debug("Server error '$code' on '$action': $msg", __FILE__);
common_server_error($msg, $code);
}
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/**
* Client error
*
* @param string $msg error message to display
* @param integer $code http error code, 400 by default
*
* @return nothing
*/
function clientError($msg, $code=400)
{
$action = $this->trimmed('action');
common_debug("User error '$code' on '$action': $msg", __FILE__);
common_user_error($msg, $code);
}
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/**
* Returns the current URL
*
* @return string current URL
*/
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function selfUrl()
{
$action = $this->trimmed('action');
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$args = $this->args;
unset($args['action']);
foreach (array_keys($_COOKIE) as $cookie) {
unset($args[$cookie]);
}
return common_local_url($action, $args);
}
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/**
* Generate a menu item
*
* @param string $url menu URL
* @param string $text menu name
* @param string $title title attribute, null by default
* @param boolean $is_selected current menu item, false by default
* @param string $id element id, null by default
*
* @return nothing
*/
function menuItem($url, $text, $title=null, $is_selected=false, $id=null)
{
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// Added @id to li for some control.
// XXX: We might want to move this to htmloutputter.php
$lattrs = array();
if ($is_selected) {
$lattrs['class'] = 'current';
}
(is_null($id)) ? $lattrs : $lattrs['id'] = $id;
$this->elementStart('li', $lattrs);
$attrs['href'] = $url;
if ($title) {
$attrs['title'] = $title;
}
$this->element('a', $attrs, $text);
$this->elementEnd('li');
}
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/**
* Generate pagination links
*
* @param boolean $have_before is there something before?
* @param boolean $have_after is there something after?
* @param integer $page current page
* @param string $action current action
* @param array $args rest of query arguments
*
* @return nothing
*/
function pagination($have_before, $have_after, $page, $action, $args=null)
{
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// Does a little before-after block for next/prev page
if ($have_before || $have_after) {
$this->elementStart('div', array('class' => 'pagination'));
$this->elementStart('dl', null);
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$this->element('dt', null, _('Pagination'));
$this->elementStart('dd', null);
$this->elementStart('ul', array('class' => 'nav'));
}
if ($have_before) {
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$pargs = array('page' => $page-1);
$newargs = $args ? array_merge($args, $pargs) : $pargs;
$this->elementStart('li', array('class' => 'nav_prev'));
$this->element('a', array('href' => common_local_url($action, $newargs), 'rel' => 'prev'),
_('After'));
$this->elementEnd('li');
}
if ($have_after) {
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$pargs = array('page' => $page+1);
$newargs = $args ? array_merge($args, $pargs) : $pargs;
$this->elementStart('li', array('class' => 'nav_next'));
$this->element('a', array('href' => common_local_url($action, $newargs), 'rel' => 'next'),
_('Before'));
$this->elementEnd('li');
}
if ($have_before || $have_after) {
$this->elementEnd('ul');
$this->elementEnd('dd');
$this->elementEnd('dl');
$this->elementEnd('div');
}
}
}