gnu-social/plugins/QnA/classes/QnA_Answer.php

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<?php
/**
* Data class to save answers to questions
*
* PHP version 5
*
* @category QnA
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://status.net/
*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2011, StatusNet, 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('STATUSNET')) {
exit(1);
}
/**
* For storing answers
*
* @category QnA
* @package StatusNet
* @author Zach Copley <zach@status.net>
* @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
* @link http://status.net/
*
* @see DB_DataObject
*/
class QnA_Answer extends Managed_DataObject
{
const OBJECT_TYPE = 'http://activityschema.org/object/answer';
public $__table = 'qna_answer'; // table name
public $id; // char(36) primary key not null -> UUID
public $question_id; // char(36) -> question.id UUID
public $profile_id; // int -> question.id
public $best; // (boolean) int -> whether the question asker has marked this as the best answer
public $revisions; // int -> count of revisions to this answer
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public $content; // text -> response text
public $created; // datetime
/**
* Get an instance by compound key
*
* This is a utility method to get a single instance with a given set of
* key-value pairs. Usually used for the primary key for a compound key; thus
* the name.
*
* @param array $kv array of key-value mappings
*
* @return QA_Answer object found, or null for no hits
*
*/
function pkeyGet($kv)
{
return Memcached_DataObject::pkeyGet('QnA_Answer', $kv);
}
/**
* The One True Thingy that must be defined and declared.
*/
public static function schemaDef()
{
return array(
'description' => 'Record of answers to questions',
'fields' => array(
'id' => array(
'type' => 'char',
'length' => 36,
'not null' => true, 'description' => 'UUID of the response'),
'uri' => array(
'type' => 'varchar',
'length' => 255,
'not null' => true,
'description' => 'UUID to the answer notice'
),
'question_id' => array(
'type' => 'char',
'length' => 36,
'not null' => true,
'description' => 'UUID of question being responded to'
),
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'content' => array('type' => 'text'), // got a better name?
'best' => array('type' => 'int', 'size' => 'tiny'),
'revisions' => array('type' => 'int'),
'profile_id' => array('type' => 'int'),
'created' => array('type' => 'datetime', 'not null' => true),
),
'primary key' => array('id'),
'unique keys' => array(
'question_uri_key' => array('uri'),
'question_id_profile_id_key' => array('question_id', 'profile_id'),
),
'indexes' => array(
'profile_id_question_id_index' => array('profile_id', 'question_id'),
)
);
}
/**
* Get an answer based on a notice
*
* @param Notice $notice Notice to check for
*
* @return QnA_Answer found response or null
*/
function getByNotice($notice)
{
$answer = self::staticGet('uri', $notice->uri);
if (empty($answer)) {
throw new Exception("No answer with URI {$notice->uri}");
}
return $answer;
}
/**
* Get the notice that belongs to this answer
*
* @return Notice
*/
function getNotice()
{
return Notice::staticGet('uri', $this->uri);
}
static function fromNotice($notice)
{
return QnA_Answer::staticGet('uri', $notice->uri);
}
function bestUrl()
{
return $this->getNotice()->bestUrl();
}
/**
* Get the Question this is an answer to
*
* @return QnA_Question
*/
function getQuestion()
{
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$question = QnA_Question::staticGet('id', $this->question_id);
if (empty($question)) {
// TRANS: Exception thown when getting a question with a non-existing ID.
// TRANS: %s is the non-existing question ID.
throw new Exception(sprintf(_m('No question with ID %s'),$this->question_id));
}
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return $question;
}
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function getProfile()
{
$profile = Profile::staticGet('id', $this->profile_id);
if (empty($profile)) {
// TRANS: Exception thown when getting a profile with a non-existing ID.
// TRANS: %s is the non-existing profile ID.
throw new Exception(sprintf(_m('No profile with ID %s'),$this->profile_id));
}
return $profile;
}
function asHTML()
{
return self::toHTML(
$this->getProfile(),
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$this->getQuestion(),
$this
);
}
function asString()
{
return self::toString(
$this->getProfile(),
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$this->getQuestion(),
$this
);
}
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static function toHTML($profile, $question, $answer)
{
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$notice = $question->getNotice();
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$out = new XMLStringer();
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$cls = array('qna_answer');
if (!empty($answer->best)) {
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$cls[] = 'best';
}
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$out->elementStart('p', array('class' => implode(' ', $cls)));
$out->elementStart('span', 'answer-content');
$out->raw(common_render_text($answer->content));
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$out->elementEnd('span');
if (!empty($answer->revisions)) {
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$out->elementstart('span', 'answer-revisions');
$out->text(
htmlspecialchars(
// Notification of how often an answer was revised.
// TRANS: %s is the number of answer revisions.
sprintf(_m('%s revision','%s revisions',$answer->revisions), $answer->revisions)
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)
);
$out->elementEnd('span');
}
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$out->elementEnd('p');
return $out->getString();
}
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static function toString($profile, $question, $answer)
{
// @todo FIXME: unused variable?
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$notice = $question->getNotice();
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return sprintf(
// TRANS: Text for a question that was answered.
// TRANS: %1$s is the user that answered, %2$s is the question title,
// TRANS: %2$s is the answer content.
_m('%1$s answered the question "%2$s": %3$s'),
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htmlspecialchars($profile->getBestName()),
htmlspecialchars($question->title),
htmlspecialchars($answer->content)
);
}
/**
* Save a new answer notice
*
* @param Profile $profile
* @param Question $Question the question being answered
* @param array
*
* @return Notice saved notice
*/
static function saveNew($profile, $question, $text, $options = null)
{
if (empty($options)) {
$options = array();
}
$answer = new QnA_Answer();
$answer->id = UUID::gen();
$answer->profile_id = $profile->id;
$answer->question_id = $question->id;
$answer->revisions = 0;
$answer->best = 0;
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$answer->content = $text;
$answer->created = common_sql_now();
$answer->uri = common_local_url(
'qnashowanswer',
array('id' => $answer->id)
);
common_log(LOG_DEBUG, "Saving answer: $answer->id, $answer->uri");
$answer->insert();
$content = sprintf(
// TRANS: Text for a question that was answered.
// TRANS: %s is the question title.
_m('answered "%s"'),
$question->title
);
$link = '<a href="' . htmlspecialchars($answer->uri) . '">' . htmlspecialchars($question->title) . '</a>';
// TRANS: Rendered version of the notice content answering a question.
// TRANS: %s a link to the question with question title as the link content.
$rendered = sprintf(_m('answered "%s"'), $link);
$tags = array();
$replies = array();
$options = array_merge(
array(
'urls' => array(),
'content' => $content,
'rendered' => $rendered,
'tags' => $tags,
'replies' => $replies,
'reply_to' => $question->getNotice()->id,
'object_type' => self::OBJECT_TYPE
),
$options
);
if (!array_key_exists('uri', $options)) {
$options['uri'] = $answer->uri;
}
$saved = Notice::saveNew(
$profile->id,
$content,
array_key_exists('source', $options) ?
$options['source'] : 'web',
$options
);
return $saved;
}
}