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<?php

/**

 * PEAR_Installer_Role

 *

 * 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

 */

/**

 * base class for installer roles

 */

require_once 'PEAR/Installer/Role/Common.php';

require_once 'PEAR/XMLParser.php';

/**

 * @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: 1.10.1

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

 * @since      Class available since Release 1.4.0a1

 */

class PEAR_Installer_Role

{

    /**

     * Set up any additional configuration variables that file roles require

     *

     * Never call this directly, it is called by the PEAR_Config constructor

     * @param PEAR_Config

     */

    public static function initializeConfig(&$config)

    {

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

            PEAR_Installer_Role::registerRoles();

        }

        foreach ($GLOBALS['_PEAR_INSTALLER_ROLES'] as $class => $info) {

            if (!$info['config_vars']) {

                continue;

            }

            $config->_addConfigVars($class, $info['config_vars']);

        }

    }

    /**

     * @param PEAR_PackageFile_v2

     * @param string role name

     * @param PEAR_Config

     * @return PEAR_Installer_Role_Common

     */

    public static function &factory($pkg, $role, &$config)

    {

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

            PEAR_Installer_Role::registerRoles();

        }

        if (!in_array($role, PEAR_Installer_Role::getValidRoles($pkg->getPackageType()))) {

            $a = false;

            return $a;

        }

        $a = 'PEAR_Installer_Role_' . ucfirst($role);

        if (!class_exists($a)) {

            require_once str_replace('_', '/', $a) . '.php';

        }

        $b = new $a($config);

        return $b;

    }

    /**

     * Get a list of file roles that are valid for the particular release type.

     *

     * For instance, src files serve no purpose in regular php releases.

     * @param string

     * @param bool clear cache

     * @return array

     */

    public static function getValidRoles($release, $clear = false)

    {

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

            PEAR_Installer_Role::registerRoles();

        }

        static $ret = array();

        if ($clear) {

            $ret = array();

        }

        if (isset($ret[$release])) {

            return $ret[$release];

        }

        $ret[$release] = array();

        foreach ($GLOBALS['_PEAR_INSTALLER_ROLES'] as $role => $okreleases) {

            if (in_array($release, $okreleases['releasetypes'])) {

                $ret[$release][] = strtolower(str_replace('PEAR_Installer_Role_', '', $role));

            }

        }

        return $ret[$release];

    }

    /**

     * Get a list of roles that require their files to be installed

     *

     * Most roles must be installed, but src and package roles, for instance

     * are pseudo-roles.  src files are compiled into a new extension.  Package

     * roles are actually fully bundled releases of a package

     * @param bool clear cache

     * @return array

     */

    public static function getInstallableRoles($clear = false)

    {

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

            PEAR_Installer_Role::registerRoles();

        }

        static $ret;

        if ($clear) {

            unset($ret);

        }

        if (isset($ret)) {

            return $ret;

        }

        $ret = array();

        foreach ($GLOBALS['_PEAR_INSTALLER_ROLES'] as $role => $okreleases) {

            if ($okreleases['installable']) {

                $ret[] = strtolower(str_replace('PEAR_Installer_Role_', '', $role));

            }

        }

        return $ret;

    }

    /**

     * Return an array of roles that are affected by the baseinstalldir attribute

     *

     * Most roles ignore this attribute, and instead install directly into:

     * PackageName/filepath

     * so a tests file tests/file.phpt is installed into PackageName/tests/filepath.php

     * @param bool clear cache

     * @return array

     */

    public static function getBaseinstallRoles($clear = false)

    {

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

            PEAR_Installer_Role::registerRoles();

        }

        static $ret;

        if ($clear) {

            unset($ret);

        }

        if (isset($ret)) {

            return $ret;

        }

        $ret = array();

        foreach ($GLOBALS['_PEAR_INSTALLER_ROLES'] as $role => $okreleases) {

            if ($okreleases['honorsbaseinstall']) {

                $ret[] = strtolower(str_replace('PEAR_Installer_Role_', '', $role));

            }

        }

        return $ret;

    }

    /**

     * Return an array of file roles that should be analyzed for PHP content at package time,

     * like the "php" role.

     * @param bool clear cache

     * @return array

     */

    public static function getPhpRoles($clear = false)

    {

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

            PEAR_Installer_Role::registerRoles();

        }

        static $ret;

        if ($clear) {

            unset($ret);

        }

        if (isset($ret)) {

            return $ret;

        }

        $ret = array();

        foreach ($GLOBALS['_PEAR_INSTALLER_ROLES'] as $role => $okreleases) {

            if ($okreleases['phpfile']) {

                $ret[] = strtolower(str_replace('PEAR_Installer_Role_', '', $role));

            }

        }

        return $ret;

    }

    /**

     * Scan through the Command directory looking for classes

     * and see what commands they implement.

     * @param string which directory to look for classes, defaults to

     *               the Installer/Roles subdirectory of

     *               the directory from where this file (__FILE__) is

     *               included.

     *

     * @return bool TRUE on success, a PEAR error on failure

     */

    public static function registerRoles($dir = null)

    {

        $GLOBALS['_PEAR_INSTALLER_ROLES'] = array();

        $parser = new PEAR_XMLParser;

        if ($dir === null) {

            $dir = dirname(__FILE__) . '/Role';

        }

        if (!file_exists($dir) || !is_dir($dir)) {

            return PEAR::raiseError("registerRoles: opendir($dir) failed: does not exist/is not directory");

        }

        $dp = @opendir($dir);

        if (empty($dp)) {

            return PEAR::raiseError("registerRoles: opendir($dir) failed: $php_errmsg");

        }

        while ($entry = readdir($dp)) {

            if ($entry{0} == '.' || substr($entry, -4) != '.xml') {

                continue;

            }

            $class = "PEAR_Installer_Role_".substr($entry, 0, -4);

            // List of roles

            if (!isset($GLOBALS['_PEAR_INSTALLER_ROLES'][$class])) {

                $file = "$dir/$entry";

                $parser->parse(file_get_contents($file));

                $data = $parser->getData();

                if (!is_array($data['releasetypes'])) {

                    $data['releasetypes'] = array($data['releasetypes']);

                }

                $GLOBALS['_PEAR_INSTALLER_ROLES'][$class] = $data;

            }

        }

        closedir($dp);

        ksort($GLOBALS['_PEAR_INSTALLER_ROLES']);

        PEAR_Installer_Role::getBaseinstallRoles(true);

        PEAR_Installer_Role::getInstallableRoles(true);

        PEAR_Installer_Role::getPhpRoles(true);

        PEAR_Installer_Role::getValidRoles('****', true);

        return true;

    }

}