<?php

require_once(dirname(__FILE__).'/const.php');

// -----------------------------------------------------------------------------

// the ExecPhp_Option class handles the loading and storing of the

// plugin options including all needed conversion routines during upgrade

// -----------------------------------------------------------------------------

if (!class_exists('ExecPhp_Option')) :

define('ExecPhp_OPTION_VERSION', 'version');

define('ExecPhp_OPTION_WIDGET_SUPPORT', 'widget_support');

define('ExecPhp_OPTION_HAS_OLD_STYLE', 'exec-php_has_old_style');

define('ExecPhp_OPTION_IGNORE_OLD_STYLE_WARNING', 'exec-php_ignore_old_style_warning');

class ExecPhp_Option

{

	var $m_status = ExecPhp_STATUS_UNINITIALIZED;

	var $m_version = ExecPhp_VERSION;

	// default option values will be set during load()

	var $m_widget_support = true;

	// ---------------------------------------------------------------------------

	// init

	// ---------------------------------------------------------------------------

	function ExecPhp_Option()

	{

		$this->m_status = $this->upgrade();

	}

	// ---------------------------------------------------------------------------

	// option handling

	// ---------------------------------------------------------------------------

	// Upgrades plugin from previous versions or even installs it

	function upgrade()

	{

		$old_version = $this->detect_plugin_version();

		while ($old_version != ExecPhp_VERSION)

		{

			$this->load();

			if (version_compare($old_version, '4.0.dev') < 0)

			{

				$this->upgrade_to_4_0();

				$old_version = '4.0';

			}

			else if (version_compare($old_version, '4.1.dev') < 0)

				$old_version = '4.1';

			else if (version_compare($old_version, '4.2.dev') < 0)

			{

				$this->upgrade_to_4_2();

				$old_version = '4.2';

			}

			else if (version_compare($old_version, '4.3.dev') < 0)

				$old_version = '4.3';

			else if (version_compare($old_version, '4.4.dev') < 0)

				$old_version = '4.4';

			else if (version_compare($old_version, '4.5.dev') < 0)

				$old_version = '4.5';

			else if (version_compare($old_version, '4.6.dev') < 0)

				$old_version = '4.6';

			else if (version_compare($old_version, '4.7.dev') < 0)

				$old_version = '4.7';

			else if (version_compare($old_version, '4.8.dev') < 0)

				$old_version = '4.8';

			else if (version_compare($old_version, '4.9.dev') < 0)

				$old_version = '4.9';

			else

				// we are downgrading to an older version of the plugin by

				// resetting the version to 0 and walking up the conversion path

				$old_version = '0';

			$this->m_version = $old_version;

			$this->save();

		}

		$this->load();

		return ExecPhp_STATUS_OKAY;

	}

	function save()

	{

		// introduced in 4.0

		$option[ExecPhp_OPTION_VERSION] = $this->m_version;

		// introduced in 4.0

		$option[ExecPhp_OPTION_WIDGET_SUPPORT] = $this->m_widget_support;

		update_option(ExecPhp_PLUGIN_ID, $option);

	}

	function load()

	{

		$option = get_option(ExecPhp_PLUGIN_ID);

		// introduced in 4.0

		if (isset($option[ExecPhp_OPTION_WIDGET_SUPPORT]))

			$this->m_widget_support = $option[ExecPhp_OPTION_WIDGET_SUPPORT];

		else

			$this->m_widget_support = true;

	}

	// ---------------------------------------------------------------------------

	// tools

	// ---------------------------------------------------------------------------

	function detect_plugin_version()

	{

		$option = get_option(ExecPhp_PLUGIN_ID);

		if ($option === false)

			$version = '0';

		else

			$version = $option[ExecPhp_OPTION_VERSION];

		return $version;

	}

	function upgrade_to_4_0()

	{

		// this is first installation of the plugin or upgrade from a version

		// prior to 4.0;

		// still needed for deletion from the database - these are obsolete

		// since version 3.1

		delete_option(ExecPhp_OPTION_HAS_OLD_STYLE);

		delete_option(ExecPhp_OPTION_IGNORE_OLD_STYLE_WARNING);

		// be sure standard roles are available, these may be deleted or

		// renamed by the blog administrator

		$role = get_role('administrator');

		if ($role !== NULL)

			$role->add_cap(ExecPhp_CAPABILITY_EXECUTE_ARTICLES);

	}

	function upgrade_to_4_2()

	{

		// be sure standard roles are available, these may be deleted or

		// renamed by the blog administrator

		$role = get_role('administrator');

		if ($role !== NULL)

			$role->add_cap(ExecPhp_CAPABILITY_EDIT_OTHERS_PHP);

	}

	// ---------------------------------------------------------------------------

	// access

	// ---------------------------------------------------------------------------

	function set_from_POST()

	{

		$this->m_widget_support

			= isset($_POST[ExecPhp_POST_WIDGET_SUPPORT]);

	}

	function get_status()

	{

		return $this->m_status;

	}

	function get_version()

	{

		return $this->m_version;

	}

	function get_widget_support()

	{

		return $this->m_widget_support;

	}

}

endif;

?>