Subversion-Projekte lars-tiefland.php_share

<?php

/**

 * PEAR_Frontend, the singleton-based frontend for user input/output

 *

 * PHP versions 4 and 5

 *

 * @category   pear

 * @package    PEAR

 * @author     Greg Beaver <cellog@php.net>

 * @copyright  1997-2009 The Authors

 * @license    http://opensource.org/licenses/bsd-license.php New BSD License

 * @version    CVS: $Id: Frontend.php 313023 2011-07-06 19:17:11Z dufuz $

 * @link       http://pear.php.net/package/PEAR

 * @since      File available since Release 1.4.0a1

 */

/**

 * Include error handling

 */

//require_once 'PEAR.php';

/**

 * Which user interface class is being used.

 * @var string class name

 */

$GLOBALS['_PEAR_FRONTEND_CLASS'] = 'PEAR_Frontend_CLI';

/**

 * Instance of $_PEAR_Command_uiclass.

 * @var object

 */

$GLOBALS['_PEAR_FRONTEND_SINGLETON'] = null;

/**

 * Singleton-based frontend for PEAR user input/output

 *

 * @category   pear

 * @package    PEAR

 * @author     Greg Beaver <cellog@php.net>

 * @copyright  1997-2009 The Authors

 * @license    http://opensource.org/licenses/bsd-license.php New BSD License

 * @version    Release: 1.9.4

 * @link       http://pear.php.net/package/PEAR

 * @since      Class available since Release 1.4.0a1

 */

class PEAR_Frontend extends PEAR

{

    /**

     * Retrieve the frontend object

     * @return PEAR_Frontend_CLI|PEAR_Frontend_Web|PEAR_Frontend_Gtk

     * @static

     */

    function &singleton($type = null)

    {

        if ($type === null) {

            if (!isset($GLOBALS['_PEAR_FRONTEND_SINGLETON'])) {

                $a = false;

                return $a;

            }

            return $GLOBALS['_PEAR_FRONTEND_SINGLETON'];

        }

        $a = PEAR_Frontend::setFrontendClass($type);

        return $a;

    }

    /**

     * Set the frontend class that will be used by calls to {@link singleton()}

     *

     * Frontends are expected to conform to the PEAR naming standard of

     * _ => DIRECTORY_SEPARATOR (PEAR_Frontend_CLI is in PEAR/Frontend/CLI.php)

     * @param string $uiclass full class name

     * @return PEAR_Frontend

     * @static

     */

    function &setFrontendClass($uiclass)

    {

        if (is_object($GLOBALS['_PEAR_FRONTEND_SINGLETON']) &&

              is_a($GLOBALS['_PEAR_FRONTEND_SINGLETON'], $uiclass)) {

            return $GLOBALS['_PEAR_FRONTEND_SINGLETON'];

        }

        if (!class_exists($uiclass)) {

            $file = str_replace('_', '/', $uiclass) . '.php';

            if (PEAR_Frontend::isIncludeable($file)) {

                include_once $file;

            }

        }

        if (class_exists($uiclass)) {

            $obj = &new $uiclass;

            // quick test to see if this class implements a few of the most

            // important frontend methods

            if (is_a($obj, 'PEAR_Frontend')) {

                $GLOBALS['_PEAR_FRONTEND_SINGLETON'] = &$obj;

                $GLOBALS['_PEAR_FRONTEND_CLASS'] = $uiclass;

                return $obj;

            }

            $err = PEAR::raiseError("not a frontend class: $uiclass");

            return $err;

        }

        $err = PEAR::raiseError("no such class: $uiclass");

        return $err;

    }

    /**

     * Set the frontend class that will be used by calls to {@link singleton()}

     *

     * Frontends are expected to be a descendant of PEAR_Frontend

     * @param PEAR_Frontend

     * @return PEAR_Frontend

     * @static

     */

    function &setFrontendObject($uiobject)

    {

        if (is_object($GLOBALS['_PEAR_FRONTEND_SINGLETON']) &&

              is_a($GLOBALS['_PEAR_FRONTEND_SINGLETON'], get_class($uiobject))) {

            return $GLOBALS['_PEAR_FRONTEND_SINGLETON'];

        }

        if (!is_a($uiobject, 'PEAR_Frontend')) {

            $err = PEAR::raiseError('not a valid frontend class: (' .

                get_class($uiobject) . ')');

            return $err;

        }

        $GLOBALS['_PEAR_FRONTEND_SINGLETON'] = &$uiobject;

        $GLOBALS['_PEAR_FRONTEND_CLASS'] = get_class($uiobject);

        return $uiobject;

    }

    /**

     * @param string $path relative or absolute include path

     * @return boolean

     * @static

     */

    function isIncludeable($path)

    {

        if (file_exists($path) && is_readable($path)) {

            return true;

        }

        $fp = @fopen($path, 'r', true);

        if ($fp) {

            fclose($fp);

            return true;

        }

        return false;

    }

    /**

     * @param PEAR_Config

     */

    function setConfig(&$config)

    {

    }

    /**

     * This can be overridden to allow session-based temporary file management

     *

     * By default, all files are deleted at the end of a session.  The web installer

     * needs to be able to sustain a list over many sessions in order to support

     * user interaction with install scripts

     */

    function addTempFile($file)

    {

        $GLOBALS['_PEAR_Common_tempfiles'][] = $file;

    }

    /**

     * Log an action

     *

     * @param string $msg the message to log

     * @param boolean $append_crlf

     * @return boolean true

     * @abstract

     */

    function log($msg, $append_crlf = true)

    {

    }

    /**

     * Run a post-installation script

     *

     * @param array $scripts array of post-install scripts

     * @abstract

     */

    function runPostinstallScripts(&$scripts)

    {

    }

    /**

     * Display human-friendly output formatted depending on the

     * $command parameter.

     *

     * This should be able to handle basic output data with no command

     * @param mixed  $data    data structure containing the information to display

     * @param string $command command from which this method was called

     * @abstract

     */

    function outputData($data, $command = '_default')

    {

    }

    /**

     * Display a modal form dialog and return the given input

     *

     * A frontend that requires multiple requests to retrieve and process

     * data must take these needs into account, and implement the request

     * handling code.

     * @param string $command  command from which this method was called

     * @param array  $prompts  associative array. keys are the input field names

     *                         and values are the description

     * @param array  $types    array of input field types (text, password,

     *                         etc.) keys have to be the same like in $prompts

     * @param array  $defaults array of default values. again keys have

     *                         to be the same like in $prompts.  Do not depend

     *                         on a default value being set.

     * @return array input sent by the user

     * @abstract

     */

    function userDialog($command, $prompts, $types = array(), $defaults = array())

    {

    }

}