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<?php
/*
* Laconica - a distributed open-source microblogging tool
* Copyright (C) 2008, Controlez-Vous, Inc.
*
* 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/>.
*/
if (!defined('LACONICA')) { exit(1); }
class Action { // lawsuit
var $args;
function Action() {
}
# For initializing members of the class
function prepare($argarray) {
$this->args =& common_copy_args($argarray);
return true;
}
# 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');
}
}
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