FormlessAction.php

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<?php
abstract class FormlessAction extends Action {
 
    abstract public function onView();
 
    protected function getFormFields() {
        return false;
    }
 
    public function onSubmit( $data ) {
        return false;
    }
 
    public function onSuccess() {
        return false;
    }
 
    public function show() {
        $this->setHeaders();
 
        // This will throw exceptions if there's a problem
        $this->checkCanExecute( $this->getUser() );
 
        $this->getOutput()->addHTML( $this->onView() );
    }
 
    public function execute( array $data = null, $captureErrors = true ) {
        try {
            // Set a new context so output doesn't leak.
            $this->context = clone $this->getContext();
            if ( is_array( $data ) ) {
                $this->context->setRequest( new FauxRequest( $data, false ) );
            }
 
            // This will throw exceptions if there's a problem
            $this->checkCanExecute( $this->getUser() );
 
            $this->onView();
            return true;
        }
        catch ( ErrorPageError $e ) {
            if ( $captureErrors ) {
                return false;
            } else {
                throw $e;
            }
        }
    }
}