protected function checkTransaction(array $context)
    {
        if (!in_array($context['action'], $this->allowed)) {
            throw new \UnexpectedValueException("Invalid action '{$context['action']}' specified for changelog (must be one of [ " . implode(', ', $this->allowed) . ' ])');
        }
        if (empty($context['old']) && empty($context['new'])) {
            throw new \UnexpectedValueException('Tried to log something that cannot be: both old and new content are empty');
        }
        if (empty($context['old']) && in_array($context['action'], ['UPDATE', 'DELETE'])) {
            throw new \UnexpectedValueException("Cannot log action '{$context['action']}' when old content doesn't exist");
        }
        if (empty($context['new']) && in_array($context['action'], ['INSERT', 'UPDATE'])) {
            throw new \UnexpectedValueException("Cannot log action '{$context['action']}' when new content is empty");
        }
    }
protected function checkTransaction(array $context)
    {
        if (!in_array($context['action'], $this->allowed)) {
            throw new \UnexpectedValueException("Invalid action '{$context['action']}' specified for changelog (must be one of [ " . implode(', ', $this->allowed) . ' ])');
        }
        if (empty($context['old']) && empty($context['new'])) {
            throw new \UnexpectedValueException('Tried to log something that cannot be: both old and new content are empty');
        }
        if (empty($context['old']) && in_array($context['action'], ['UPDATE', 'DELETE'])) {
            throw new \UnexpectedValueException("Cannot log action '{$context['action']}' when old content doesn't exist");
        }
        if (empty($context['new']) && in_array($context['action'], ['INSERT', 'UPDATE'])) {
            throw new \UnexpectedValueException("Cannot log action '{$context['action']}' when new content is empty");
        }
    }
protected function checkTransaction ( array $ context ) { if ( ! in_array ( $ context [ 'action' ] , $ this -> allowed ) ) { throw new \ UnexpectedValueException ( "Invalid action '{$context['action']}' specified for changelog (must be one of [ " . implode ( ', ' , $ this -> allowed ) . ' ])' ) ; } if ( empty ( $ context [ 'old' ] ) && empty ( $ context [ 'new' ] ) ) { throw new \ UnexpectedValueException ( 'Tried to log something that cannot be: both old and new content are empty' ) ; } if ( empty ( $ context [ 'old' ] ) && in_array ( $ context [ 'action' ] , [ 'UPDATE' , 'DELETE' ] ) ) { throw new \ UnexpectedValueException ( "Cannot log action '{$context['action']}' when old content doesn't exist" ) ; } if ( empty ( $ context [ 'new' ] ) && in_array ( $ context [ 'action' ] , [ 'INSERT' , 'UPDATE' ] ) ) { throw new \ UnexpectedValueException ( "Cannot log action '{$context['action']}' when new content is empty" ) ; } }
Check that the requested log transaction is valid.

@param array $context

@throws \UnexpectedValueException
Check that the requested log transaction is valid .