<?php
/**
 * Command Line Interface class: Datasource
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage MailMime
 */

WBClass::load('WBCli'
, 'WBObserver');

/**
 * Command Line Interface class: Datasource
 *
 * Walk throuch Datasource
 *
 * @version 1.1.1
 * @package WB
 */
class WBCli_DatasourceWalker extends WBCli implements WBObserver
{

    /**
     * Datasource
     * @var WBDatasource_View
     */
    private $view;

    /**
     * Datasource renderer
     * @var WBDatasource_Renderer_Observable
     */
    private $renderer;

    /**
     * Command line arguments
     * @var array
     */
    protected $arguments  =   array(
            CONSOLE_GETARGS_PARAMS  =>  array(
                        'min'       =>  0,
                        'max'       =>  1,
                        'desc'      =>  'Datasource',
                        'default'   =>  ''
                    )
    );

    /**
     * 2nd constructor
     *
     * load config and setup importer
     */
    protected function init()
    {
        $this->view     =   WBClass::create('WBDatasource_View');
        $this->renderer =   WBClass::create('WBDatasource_Renderer_Observable');
        $this->renderer->attach($this);
        $this->view->setRenderer($this->renderer);
    }

    /**
     * execute programme
     *
     *
     */
    protected function execute()
    {
        if (empty($this->commands)) {
            $this->commands =   array();
        }

        $optFmt =   ' %10s: %s';
        $this->fetchDatasources();
        if (empty($this->commands)) {
            $this->pl('No datasources to walk', STDERR);
            return 1;
        }

        $this->pvl(sprintf($optFmt, 'Verbose', $this->verbosity));
        $this->pvl(sprintf($optFmt, '# of DS', count($this->commands)));
        foreach ($this->commands as $ds) {
            $this->walkDS($ds);
        }
        return 0;
    }

    private function walkDS($datasource)
    {
        $this->p($datasource . ' ');
        WBClass::load('WBException_File');
        try {
            $this->view->render($datasource);
        } catch (WBException_File $e) {
            $this->pl('Config for datasource: "' . $datasource . '" not found!', STDERR);
            return;
        } catch (Exception $e) {
            $this->pl($e->getMessage(), STDERR);
            return;
        }

        $this->pl($this->renderer->getCount());
    }

    private function fetchDatasources()
    {
        if (!empty($this->commands)) {
            return;
        }

        $config =   WBClass::create('WBConfig');
        if (!$config->load('datasource/walk', true)) {
            $this->pl('List of datasource: "etc/datasource/walk.xml" not found!', STDERR);
            return;
        }

        $this->commands = $config->get('datasource', array());
    }

    /**
     * get help text - head
     *
     * Override this method to set suitable help text
     *
     * @return string
     */
    protected function getHelpHead()
    {
        $head   =   array();
        $head[] =   'Wombat Datasource Walker';
        $head[] =   '';
        $head[] =   'Usage: ' . basename($_SERVER['_']) . ' [OPTION]... [DATASOURCE]';
        $head[] =   '';
        $head[] =   'In case no datasource is specified, it will load the list from etc/datasource/walk.xml';
        $head[] =   '';
        $head[] =   'Options:';
        $head[] =   '';
        return implode("\n", $head);
    }


    /**
     * inform observer
     *
     * @param WBDatasource_Renderer_Observable $subject
     */
    public function update($subject)
    {
        $item   =   $subject->getItem();
        // $this->pvl($item['id']);
    }
}