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Editing: Common.php

<?php
/**
 * PEAR_Task_Common, base class for installer tasks
 *
 * 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
 * @link      http://pear.php.net/package/PEAR
 * @since     File available since Release 1.4.0a1
 */
/**#@+
 * Error codes for task validation routines
 */
define('PEAR_TASK_ERROR_NOATTRIBS', 1);
define('PEAR_TASK_ERROR_MISSING_ATTRIB', 2);
define('PEAR_TASK_ERROR_WRONG_ATTRIB_VALUE', 3);
define('PEAR_TASK_ERROR_INVALID', 4);
/**#@-*/
define('PEAR_TASK_PACKAGE', 1);
define('PEAR_TASK_INSTALL', 2);
define('PEAR_TASK_PACKAGEANDINSTALL', 3);
/**
 * A task is an operation that manipulates the contents of a file.
 *
 * Simple tasks operate on 1 file.  Multiple tasks are executed after all files have been
 * processed and installed, and are designed to operate on all files containing the task.
 * The Post-install script task simply takes advantage of the fact that it will be run
 * after installation, replace is a simple task.
 *
 * Combining tasks is possible, but ordering is significant.
 *
 * <file name="test.php" role="php">
 *  <tasks:replace from="@data-dir@" to="data_dir" type="pear-config"/>
 *  <tasks:postinstallscript/>
 * </file>
 *
 * This will first replace any instance of @data-dir@ in the test.php file
 * with the path to the current data directory.  Then, it will include the
 * test.php file and run the script it contains to configure the package post-installation.
 *
 * @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: 1.10.16
 * @link      http://pear.php.net/package/PEAR
 * @since     Class available since Release 1.4.0a1
 * @abstract
 */
class PEAR_Task_Common
{
    /**
     * Valid types for this version are 'simple' and 'multiple'
     *
     * - simple tasks operate on the contents of a file and write out changes to disk
     * - multiple tasks operate on the contents of many files and write out the
     *   changes directly to disk
     *
     * Child task classes must override this property.
     *
     * @access protected
     */
    protected $type = 'simple';
    /**
     * Determines which install phase this task is executed under
     */
    public $phase = PEAR_TASK_INSTALL;
    /**
     * @access protected
     */
    protected $config;
    /**
     * @access protected
     */
    protected $registry;
    /**
     * @access protected
     */
    public $logger;
    /**
     * @access protected
     */
    protected $installphase;
    /**
     * @param PEAR_Config
     * @param PEAR_Common
     */
    function __construct(&$config, &$logger, $phase)
    {
        $this->config = &$config;
        $this->registry = &$config->getRegistry();
        $this->logger = &$logger;
        $this->installphase = $phase;
        if ($this->type == 'multiple') {
            $GLOBALS['_PEAR_TASK_POSTINSTANCES'][get_class($this)][] = &$this;
        }
    }

/**
     * Validate the basic contents of a task tag.
     *
     * @param PEAR_PackageFile_v2
     * @param array
     * @param PEAR_Config
     * @param array the entire parsed <file> tag
     *
     * @return true|array On error, return an array in format:
     *                    array(PEAR_TASK_ERROR_???[, param1][, param2][, ...])
     *
     * For PEAR_TASK_ERROR_MISSING_ATTRIB, pass the attribute name in
     * For PEAR_TASK_ERROR_WRONG_ATTRIB_VALUE, pass the attribute name and
     * an array of legal values in
     *
     * @abstract
     */
    public static function validateXml($pkg, $xml, $config, $fileXml)
    {
    }

/**
     * Initialize a task instance with the parameters
     *
     * @param    array raw, parsed xml
     * @param    array attributes from the <file> tag containing this task
     * @param    string|null last installed version of this package
     * @abstract
     */
    public function init($xml, $fileAttributes, $lastVersion)
    {
    }

/**
     * Begin a task processing session.  All multiple tasks will be processed
     * after each file has been successfully installed, all simple tasks should
     * perform their task here and return any errors using the custom
     * throwError() method to allow forward compatibility
     *
     * This method MUST NOT write out any changes to disk
     *
     * @param    PEAR_PackageFile_v2
     * @param    string file contents
     * @param    string the eventual final file location (informational only)
     * @return   string|false|PEAR_Error false to skip this file, PEAR_Error to fail
     *           (use $this->throwError), otherwise return the new contents
     * @abstract
     */
    public function startSession($pkg, $contents, $dest)
    {
    }

/**
     * This method is used to process each of the tasks for a particular
     * multiple class type.  Simple tasks need not implement this method.
     *
     * @param    array an array of tasks
     * @access   protected
     */
    public static function run($tasks)
    {
    }

/**
     * @final
     */
    public static function hasPostinstallTasks()
    {
        return isset($GLOBALS['_PEAR_TASK_POSTINSTANCES']);
    }

/**
      * @final
      */
    public static function runPostinstallTasks()
    {
        foreach ($GLOBALS['_PEAR_TASK_POSTINSTANCES'] as $class => $tasks) {
            $err = call_user_func(
                array($class, 'run'),
                $GLOBALS['_PEAR_TASK_POSTINSTANCES'][$class]
            );
            if ($err) {
                return PEAR_Task_Common::throwError($err);
            }
        }
        unset($GLOBALS['_PEAR_TASK_POSTINSTANCES']);
    }

/**
     * Determines whether a role is a script
     * @return bool
     */
    public function isScript()
    {
            return $this->type == 'script';
    }

public function throwError($msg, $code = -1)
    {
        include_once 'PEAR.php';

return PEAR::raiseError($msg, $code);
    }
}

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