/**
* Creates or updates an answer for the given $questionId.
* @param string $projectId
* @param string $questionId
* @param array $answerJson is decoded into an AnswerModel
* @param string $userId
* @return array Returns an encoded QuestionDTO fragment for the Answer
* @see AnswerModel
*/
public static function updateAnswer($projectId, $questionId, $answerJson, $userId)
{
CodeGuard::assertKeyExistsOrThrow('id', $answerJson, "answerJson");
CodeGuard::checkNotFalseAndThrow($answerJson['content'], "answerJson['content']");
$project = new ProjectModel($projectId);
ProjectCommands::checkIfArchivedAndThrow($project);
$question = new QuestionModel($project, $questionId);
// whitelist updatable items
if ($answerJson['id'] != '') {
// update existing answer
$answer = $question->readAnswer($answerJson['id']);
$answer->content = $answerJson['content'];
} else {
// create new answer
$answer = new AnswerModel();
JsonDecoder::decode($answer, array('id' => '', 'content' => $answerJson['content']));
$answer->userRef->id = $userId;
}
if (array_key_exists('textHighlight', $answerJson)) {
$answer->textHighlight = $answerJson['textHighlight'];
}
$answerId = $question->writeAnswer($answer);
// Re-read question model to pick up new answer
$question->read($questionId);
$newAnswer = $question->readAnswer($answerId);
if ($answerJson['id'] != '') {
// TODO log the activity after we confirm that the comment was successfully updated ; cjh 2013-08
ActivityCommands::updateAnswer($project, $questionId, $newAnswer);
} else {
ActivityCommands::addAnswer($project, $questionId, $newAnswer);
}
return self::encodeAnswer($newAnswer);
}
