<?php

/**
 * BuddyPress Updater.
 *
 * @package BuddyPress
 * @subpackage Updater
 */

// Exit if accessed directly
if ( !defined( 'ABSPATH' ) ) exit;

/**
 * Is this a fresh installation of BuddyPress?
 *
 * If there is no raw DB version, we infer that this is the first installation.
 *
 * @since BuddyPress (1.7.0)
 *
 * @uses get_option()
 * @uses bp_get_db_version() To get BuddyPress's database version.
 *
 * @return bool True if this is a fresh BP install, otherwise false.
 */
function bp_is_install() {
	return ! bp_get_db_version_raw();
}

/**
 * Is this a BuddyPress update?
 *
 * Determined by comparing the registered BuddyPress version to the version
 * number stored in the database. If the registered version is greater, it's
 * an update.
 *
 * @since BuddyPress (1.6.0)
 *
 * @uses get_option()
 * @uses bp_get_db_version() To get BuddyPress's database version.
 *
 * @return bool True if update, otherwise false.
 */
function bp_is_update() {

	// Current DB version of this site (per site in a multisite network)
	$current_db   = bp_get_option( '_bp_db_version' );
	$current_live = bp_get_db_version();

	// Compare versions (cast as int and bool to be safe)
	$is_update = (bool) ( (int) $current_db < (int) $current_live );

	// Return the product of version comparison
	return $is_update;
}

/**
 * Determine whether BuddyPress is in the process of being activated.
 *
 * @since BuddyPress (1.6.0)
 *
 * @uses buddypress()
 *
 * @return bool True if activating BuddyPress, false if not.
 */
function bp_is_activation( $basename = '' ) {
	$bp     = buddypress();
	$action = false;

	if ( ! empty( $_REQUEST['action'] ) && ( '-1' != $_REQUEST['action'] ) ) {
		$action = $_REQUEST['action'];
	} elseif ( ! empty( $_REQUEST['action2'] ) && ( '-1' != $_REQUEST['action2'] ) ) {
		$action = $_REQUEST['action2'];
	}

	// Bail if not activating
	if ( empty( $action ) || !in_array( $action, array( 'activate', 'activate-selected' ) ) ) {
		return false;
	}

	// The plugin(s) being activated
	if ( $action == 'activate' ) {
		$plugins = isset( $_GET['plugin'] ) ? array( $_GET['plugin'] ) : array();
	} else {
		$plugins = isset( $_POST['checked'] ) ? (array) $_POST['checked'] : array();
	}

	// Set basename if empty
	if ( empty( $basename ) && !empty( $bp->basename ) ) {
		$basename = $bp->basename;
	}

	// Bail if no basename
	if ( empty( $basename ) ) {
		return false;
	}

	// Is BuddyPress being activated?
	return in_array( $basename, $plugins );
}

/**
 * Determine whether BuddyPress is in the process of being deactivated.
 *
 * @since BuddyPress (1.6.0)
 *
 * @uses buddypress()
 *
 * @return bool True if deactivating BuddyPress, false if not.
 */
function bp_is_deactivation( $basename = '' ) {
	$bp     = buddypress();
	$action = false;

	if ( ! empty( $_REQUEST['action'] ) && ( '-1' != $_REQUEST['action'] ) ) {
		$action = $_REQUEST['action'];
	} elseif ( ! empty( $_REQUEST['action2'] ) && ( '-1' != $_REQUEST['action2'] ) ) {
		$action = $_REQUEST['action2'];
	}

	// Bail if not deactivating
	if ( empty( $action ) || !in_array( $action, array( 'deactivate', 'deactivate-selected' ) ) ) {
		return false;
	}

	// The plugin(s) being deactivated
	if ( 'deactivate' == $action ) {
		$plugins = isset( $_GET['plugin'] ) ? array( $_GET['plugin'] ) : array();
	} else {
		$plugins = isset( $_POST['checked'] ) ? (array) $_POST['checked'] : array();
	}

	// Set basename if empty
	if ( empty( $basename ) && !empty( $bp->basename ) ) {
		$basename = $bp->basename;
	}

	// Bail if no basename
	if ( empty( $basename ) ) {
		return false;
	}

	// Is bbPress being deactivated?
	return in_array( $basename, $plugins );
}

/**
 * Update the BP version stored in the database to the current version.
 *
 * @since BuddyPress (1.6.0)
 *
 * @uses bp_get_db_version() To get BuddyPress's database version.
 * @uses bp_update_option() To update BuddyPress's database version.
 */
function bp_version_bump() {
	bp_update_option( '_bp_db_version', bp_get_db_version() );
}

/**
 * Set up the BuddyPress updater.
 *
 * @since BuddyPress (1.6.0)
 */
function bp_setup_updater() {

	// Are we running an outdated version of BuddyPress?
	if ( ! bp_is_update() )
		return;

	bp_version_updater();
}

/**
 * Initialize an update or installation of BuddyPress.
 *
 * BuddyPress's version updater looks at what the current database version is,
 * and runs whatever other code is needed - either the "update" or "install"
 * code.
 *
 * This is most often used when the data schema changes, but should also be used
 * to correct issues with BuddyPress metadata silently on software update.
 *
 * @since BuddyPress (1.7.0)
 */
function bp_version_updater() {

	// Get the raw database version
	$raw_db_version = (int) bp_get_db_version_raw();

	$default_components = apply_filters( 'bp_new_install_default_components', array(
		'activity'      => 1,
		'members'       => 1,
		'settings'      => 1,
		'xprofile'      => 1,
		'notifications' => 1,
	) );

	require_once( BP_PLUGIN_DIR . '/bp-core/admin/bp-core-schema.php' );

	// Install BP schema and activate only Activity and XProfile
	if ( bp_is_install() ) {

		// Apply schema and set Activity and XProfile components as active
		bp_core_install( $default_components );
		bp_update_option( 'bp-active-components', $default_components );
		bp_core_add_page_mappings( $default_components, 'delete' );

	// Upgrades
	} else {

		// Run the schema install to update tables
		bp_core_install();

		// 1.5
		if ( $raw_db_version < 1801 ) {
			bp_update_to_1_5();
			bp_core_add_page_mappings( $default_components, 'delete' );
		}

		// 1.6
		if ( $raw_db_version < 6067 ) {
			bp_update_to_1_6();
		}

		// 1.9
		if ( $raw_db_version < 7553 ) {
			bp_update_to_1_9();
		}

		// 1.9.2
		if ( $raw_db_version < 7731 ) {
			bp_update_to_1_9_2();
		}
	}

	/** All done! *************************************************************/

	// Bump the version
	bp_version_bump();
}

/**
 * Remove unused metadata from database when upgrading from < 1.5.
 *
 * Database update methods based on version numbers.
 *
 * @since BuddyPress (1.7.0)
 */
function bp_update_to_1_5() {

	// Delete old database version options
	delete_site_option( 'bp-activity-db-version' );
	delete_site_option( 'bp-blogs-db-version'    );
	delete_site_option( 'bp-friends-db-version'  );
	delete_site_option( 'bp-groups-db-version'   );
	delete_site_option( 'bp-messages-db-version' );
	delete_site_option( 'bp-xprofile-db-version' );
}

/**
 * Remove unused metadata from database when upgrading from < 1.6.
 *
 * Database update methods based on version numbers.
 *
 * @since BuddyPress (1.7.0)
 */
function bp_update_to_1_6() {

	// Delete possible site options
	delete_site_option( 'bp-db-version'       );
	delete_site_option( '_bp_db_version'      );
	delete_site_option( 'bp-core-db-version'  );
	delete_site_option( '_bp-core-db-version' );

	// Delete possible blog options
	delete_blog_option( bp_get_root_blog_id(), 'bp-db-version'       );
	delete_blog_option( bp_get_root_blog_id(), 'bp-core-db-version'  );
	delete_site_option( bp_get_root_blog_id(), '_bp-core-db-version' );
	delete_site_option( bp_get_root_blog_id(), '_bp_db_version'      );
}

/**
 * Add the notifications component to active components.
 *
 * Notifications was added in 1.9.0, and previous installations will already
 * have the core notifications API active. We need to add the new Notifications
 * component to the active components option to retain existing functionality.
 *
 * @since BuddyPress (1.9.0)
 */
function bp_update_to_1_9() {

	// Setup hardcoded keys
	$active_components_key      = 'bp-active-components';
	$notifications_component_id = 'notifications';

	// Get the active components
	$active_components          = bp_get_option( $active_components_key );

	// Add notifications
	if ( ! in_array( $notifications_component_id, $active_components ) ) {
		$active_components[ $notifications_component_id ] = 1;
	}

	// Update the active components option
	bp_update_option( $active_components_key, $active_components );
}

/**
 * Perform database updates for BP 1.9.2
 *
 * In 1.9, BuddyPress stopped registering its theme directory when it detected
 * that bp-default (or a child theme) was not currently being used, in effect
 * deprecating bp-default. However, this ended up causing problems when site
 * admins using bp-default would switch away from the theme temporarily:
 * bp-default would no longer be available, with no obvious way (outside of
 * a manual filter) to restore it. In 1.9.2, we add an option that flags
 * whether bp-default or a child theme is active at the time of upgrade; if so,
 * the theme directory will continue to be registered even if the theme is
 * deactivated temporarily. Thus, new installations will not see bp-default,
 * but legacy installations using the theme will continue to see it.
 *
 * @since BuddyPress (1.9.2)
 */
function bp_update_to_1_9_2() {
	if ( 'bp-default' === get_stylesheet() || 'bp-default' === get_template() ) {
		update_site_option( '_bp_retain_bp_default', 1 );
	}
}

/**
 * Redirect user to BP's What's New page on first page load after activation.
 *
 * @since BuddyPress (1.7.0)
 *
 * @internal Used internally to redirect BuddyPress to the about page on activation.
 *
 * @uses set_transient() To drop the activation transient for 30 seconds.
 */
function bp_add_activation_redirect() {

	// Bail if activating from network, or bulk
	if ( isset( $_GET['activate-multi'] ) )
		return;

	// Record that this is a new installation, so we show the right
	// welcome message
	if ( bp_is_install() ) {
		set_transient( '_bp_is_new_install', true, 30 );
	}

	// Add the transient to redirect
	set_transient( '_bp_activation_redirect', true, 30 );
}

/** Activation Actions ********************************************************/

/**
 * Fire activation hooks and events.
 *
 * Runs on BuddyPress activation.
 *
 * @since BuddyPress (1.6.0)
 *
 * @uses do_action() Calls 'bp_activation' hook.
 */
function bp_activation() {

	// Force refresh theme roots.
	delete_site_transient( 'theme_roots' );

	// Use as of (1.6)
	do_action( 'bp_activation' );

	// @deprecated as of (1.6)
	do_action( 'bp_loader_activate' );
}

/**
 * Fire deactivation hooks and events.
 *
 * Runs on BuddyPress deactivation.
 *
 * @since BuddyPress (1.6.0)
 *
 * @uses do_action() Calls 'bp_deactivation' hook.
 */
function bp_deactivation() {

	// Force refresh theme roots.
	delete_site_transient( 'theme_roots' );

	// Switch to WordPress's default theme if current parent or child theme
	// depend on bp-default. This is to prevent white screens of doom.
	if ( in_array( 'bp-default', array( get_template(), get_stylesheet() ) ) ) {
		switch_theme( WP_DEFAULT_THEME, WP_DEFAULT_THEME );
		update_option( 'template_root',   get_raw_theme_root( WP_DEFAULT_THEME, true ) );
		update_option( 'stylesheet_root', get_raw_theme_root( WP_DEFAULT_THEME, true ) );
	}

	// Use as of (1.6)
	do_action( 'bp_deactivation' );

	// @deprecated as of (1.6)
	do_action( 'bp_loader_deactivate' );
}

/**
 * Fire uninstall hook.
 *
 * Runs when uninstalling BuddyPress.
 *
 * @since BuddyPress (1.6.0)
 *
 * @uses do_action() Calls 'bp_uninstall' hook.
 */
function bp_uninstall() {
	do_action( 'bp_uninstall' );
}