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

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<?php
/**
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2011, StatusNet, Inc.
*
* Revise an answer
*
* 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);
}
/**
* Revise an answer
*
* @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 QnareviseanswerAction extends Action
{
protected $user = null;
protected $error = null;
protected $question = null;
protected $answer = null;
protected $content = null;
/**
* Returns the title of the action
*
* @return string Action title
*/
function title()
{
// TRANS: Page title for revising a question
return _m('Revise 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)) {
throw new ClientException(
// TRANS: Client exception thrown trying to answer a question while not logged in.
_m("You must be logged in to answer to a question."),
403
);
}
$id = substr($this->trimmed('id'), 7);
$this->answer = QnA_Answer::getKV('id', $id);
$this->question = $this->answer->getQuestion();
if (empty($this->answer) || empty($this->question)) {
throw new ClientException(
// TRANS: Client exception thrown trying to respond to a non-existing question.
_m('Invalid or missing answer.'),
404
);
}
$this->answerText = $this->trimmed('answer');
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()) {
$this->checkSessionToken();
if ($this->arg('revise')) {
$this->showContent();
return;
} else if ($this->arg('best')) {
if ($this->user->id == $this->question->profile_id) {
$this->markBest();
return;
}
} else {
$this->reviseAnswer();
return;
}
}
$this->showPage();
}
/**
* Revise the answer
*
* @return void
*/
function reviseAnswer()
{
$answer = $this->answer;
try {
$orig = clone($answer);
$answer->content = $this->answerText;
$answer->revisions++;
$result = $answer->update($orig);
} catch (ClientException $ce) {
$this->error = $ce->getMessage();
$this->showPage();
return;
}
if ($this->boolean('ajax')) {
common_debug("ajaxy part");
$this->startHTML('text/xml;charset=utf-8');
$this->elementStart('head');
// TRANS: Page title after sending an answer.
$this->element('title', null, _m('Answer'));
$this->elementEnd('head');
$this->elementStart('body');
$form = new QnashowanswerForm($this, $answer);
$form->show();
$this->elementEnd('body');
$this->endHTML();
} else {
common_redirect($this->answer->getUrl(), 303);
}
}
/**
* Mark the answer as the "best" answer
*
* @return void
*/
function markBest()
{
$question = $this->question;
$answer = $this->answer;
try {
// close the question to further answers
$orig = clone($question);
$question->closed = 1;
$result = $question->update($orig);
// mark this answer an the best answer
$orig = clone($answer);
$answer->best = 1;
$result = $answer->update($orig);
} catch (ClientException $ce) {
$this->error = $ce->getMessage();
$this->showPage();
return;
}
if ($this->boolean('ajax')) {
common_debug("ajaxy part");
$this->startHTML('text/xml;charset=utf-8');
$this->elementStart('head');
// TRANS: Page title after sending an answer.
$this->element('title', null, _m('Answer'));
$this->elementEnd('head');
$this->elementStart('body');
$form = new QnashowanswerForm($this, $answer);
$form->show();
$this->elementEnd('body');
$this->endHTML();
} else {
common_redirect($this->answer->getUrl(), 303);
}
}
/**
* Show the revise answer form
*
* @return void
*/
function showContent()
{
if (!empty($this->error)) {
$this->element('p', 'error', $this->error);
}
if ($this->boolean('ajax')) {
$this->showAjaxReviseForm();
} else {
$form = new QnareviseanswerForm($this->answer, $this);
$form->show();
}
return;
}
function showAjaxReviseForm()
{
$this->startHTML('text/xml;charset=utf-8');
$this->elementStart('head');
// TRANS: Form title for sending an answer.
$this->element('title', null, _m('TITLE','Answer'));
$this->elementEnd('head');
$this->elementStart('body');
$form = new QnareviseanswerForm($this->answer, $this);
$form->show();
$this->elementEnd('body');
$this->endHTML();
}
/**
* 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;
}
}
}