gnu-social/plugins/QnA/actions/qnanewanswer.php

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2011, StatusNet, Inc.
*
* Answer a question
*
* PHP version 5
*
* 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 QnA
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @copyright 2011 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
// This check helps protect against security problems;
// your code file can't be executed directly from the web.
exit(1);
}
/**
* Answer a question
*
* @category QnA
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @copyright 2010 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
* @link http://status.net/
*/
class QnanewanswerAction extends Action
{
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protected $user = null;
protected $error = null;
protected $complete = null;
public $question = null;
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protected $content = null;
/**
* Returns the title of the action
*
* @return string Action title
*/
function title()
{
// TRANS: Page title for and answer to a question.
return _m('Answer');
}
/**
* For initializing members of the class.
*
* @param array $argarray misc. arguments
*
* @return boolean true
*/
function prepare($argarray)
{
parent::prepare($argarray);
if ($this->boolean('ajax')) {
StatusNet::setApi(true);
}
$this->user = common_current_user();
if (empty($this->user)) {
// TRANS: Client exception thrown trying to answer a question while not logged in.
throw new ClientException(
_m("You must be logged in to answer to a question."),
403
);
}
if ($this->isPost()) {
$this->checkSessionToken();
}
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$id = substr($this->trimmed('id'), 9);
$this->question = QnA_Question::staticGet('id', $id);
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if (empty($this->question)) {
// TRANS: Client exception thrown trying to respond to a non-existing question.
throw new ClientException(
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_m('Invalid or missing question.'),
404
);
}
$this->answerText = $this->trimmed('answer');
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return true;
}
/**
* Handler method
*
* @param array $argarray is ignored since it's now passed in in prepare()
*
* @return void
*/
function handle($argarray=null)
{
parent::handle($argarray);
if ($this->isPost()) {
$this->newAnswer();
} else {
$this->showForm();
}
return;
}
/**
* Add a new answer
*
* @return void
*/
function newAnswer()
{
$profile = $this->user->getProfile();
try {
$notice = QnA_Answer::saveNew(
$profile,
$this->question,
$this->answerText
);
} catch (ClientException $ce) {
$this->error = $ce->getMessage();
$this->showForm($this->error);
return;
}
if ($this->boolean('ajax')) {
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common_debug("ajaxy part");
$answer = $this->question->getAnswer($profile);
header('Content-Type: text/xml;charset=utf-8');
$this->xw->startDocument('1.0', 'UTF-8');
$this->elementStart('html');
$this->elementStart('head');
// TRANS: Page title after sending an answer.
$this->element('title', null, _m('Answers'));
$this->elementEnd('head');
$this->elementStart('body');
$nli = new NoticeAnswerListItem($notice, $this);
$nli->show();
$this->elementEnd('body');
$this->elementEnd('html');
} else {
common_redirect($this->question->bestUrl(), 303);
}
}
/**
* Show the Answer form
*
* @return void
*/
function showContent()
{
if (!empty($this->error)) {
$this->element('p', 'error', $this->error);
}
$form = new QnanewanswerForm($this->question, $this);
$form->show();
return;
}
/**
* Return true if read only.
*
* MAY override
*
* @param array $args other arguments
*
* @return boolean is read only action?
*/
function isReadOnly($args)
{
if ($_SERVER['REQUEST_METHOD'] == 'GET' ||
$_SERVER['REQUEST_METHOD'] == 'HEAD') {
return true;
} else {
return false;
}
}
/**
* Show an Ajax-y error message
*
* Goes back to the browser, where it's shown in a popup.
*
* @param string $msg Message to show
*
* @return void
*/
function ajaxErrorMsg($msg)
{
$this->startHTML('text/xml;charset=utf-8', true);
$this->elementStart('head');
// TRANS: Page title after an AJAX error occurs on the post answer page.
$this->element('title', null, _('Ajax Error'));
$this->elementEnd('head');
$this->elementStart('body');
$this->element('p', array('id' => 'error'), $msg);
$this->elementEnd('body');
$this->elementEnd('html');
}
/**
* Show an Ajax-y answer form
*
* Goes back to the browser, where it's shown in a popup.
*
* @param string $msg Message to show
*
* @return void
*/
function ajaxShowForm()
{
common_debug('ajaxShowForm()');
$this->startHTML('text/xml;charset=utf-8', true);
$this->elementStart('head');
// TRANS: Title for form to send answer to a question.
$this->element('title', null, _m('TITLE','Your answer'));
$this->elementEnd('head');
$this->elementStart('body');
$form = new QnanewanswerForm($this, $this->question);
$form->show();
$this->elementEnd('body');
$this->elementEnd('html');
}
/**
* @param string $msg An error message, if any
*
* @return void
*/
function showForm($msg = null)
{
common_debug("show form - msg = $msg");
if ($this->boolean('ajax')) {
if ($msg) {
$this->ajaxErrorMsg($msg);
} else {
$this->ajaxShowForm();
}
return;
}
$this->msg = $msg;
$this->showPage();
}
}
class NoticeAnswerListItem extends NoticeListItem
{
protected $question;
/**
* constructor
*
* Also initializes the profile attribute.
*
* @param Notice $notice The notice we'll display
*/
function __construct($notice, $out=null)
{
parent::__construct($notice, $out);
$this->question = $out->question;
}
function show()
{
if (empty($this->notice)) {
common_log(LOG_WARNING, "Trying to show missing notice; skipping.");
return;
} else if (empty($this->profile)) {
common_log(LOG_WARNING, "Trying to show missing profile (" . $this->notice->profile_id . "); skipping.");
return;
}
$this->showStart();
$this->showNotice();
$this->showNoticeInfo();
$notice = $this->question->getNotice();
$this->out->hidden('inreplyto', $notice->id);
$this->showEnd();
}
}