From 7f2e9a4e72dd94a75ee0e1dff02b7e522884c3a2 Mon Sep 17 00:00:00 2001
From: Sean Harvey <sean@silverstripe.com>
Date: Wed, 13 Feb 2013 10:16:39 +1300
Subject: [PATCH] NEW Add variant for regular subsite module.

---
 code/search/SearchVariantSubsites.php | 92 +++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 code/search/SearchVariantSubsites.php

diff --git a/code/search/SearchVariantSubsites.php b/code/search/SearchVariantSubsites.php
new file mode 100644
index 0000000..f2a9b37
--- /dev/null
+++ b/code/search/SearchVariantSubsites.php
@@ -0,0 +1,92 @@
+<?php
+
+class SearchVariantSubsites extends SearchVariant {
+
+	function appliesToEnvironment() {
+		return class_exists('Subsite');
+	}
+
+	function appliesTo($class, $includeSubclasses) {
+		// Include all DataExtensions that contain a SubsiteID.
+		// TODO: refactor subsites to inherit a common interface, so we can run introspection once only.
+		return SearchIntrospection::has_extension($class, 'SiteTreeSubsites', $includeSubclasses) ||
+			SearchIntrospection::has_extension($class, 'GroupSubsites', $includeSubclasses) ||
+			SearchIntrospection::has_extension($class, 'FileSubsites', $includeSubclasses) ||
+			SearchIntrospection::has_extension($class, 'SiteConfigSubsites', $includeSubclasses);
+	}
+
+	function currentState() {
+		 return Subsite::currentSubsiteID();
+	}
+
+	function reindexStates() {
+		static $ids = null;
+
+		if ($ids === null) {
+			$ids = array(0);
+			foreach (DataObject::get('Subsite') as $subsite) $ids[] = $subsite->ID;
+		}
+
+		return $ids;
+	}
+
+	function activateState($state) {
+		if (Controller::has_curr()) {
+			Subsite::changeSubsite($state);
+		}
+		else {
+			// TODO: This is a nasty hack - calling Subsite::changeSubsite after request ends
+			// throws error because no current controller to access session on
+			$_GET['SubsiteID'] = $state;
+		}
+	}
+
+	function alterDefinition($base, $index) {
+		$self = get_class($this);
+		
+		$index->filterFields['_subsite'] = array(
+			'name' => '_subsite',
+			'field' => '_subsite',
+			'fullfield' => '_subsite',
+			'base' => $base,
+			'origin' => $base,
+			'type' => 'Int',
+			'lookup_chain' => array(array('call' => 'variant', 'variant' => $self, 'method' => 'currentState'))
+		);
+	}
+
+	function alterQuery($query, $index) {
+		$subsite = Subsite::currentSubsiteID();
+		$query->filter('_subsite', array($subsite, SearchQuery::$missing));
+	}
+
+	static $subsites = null;
+
+	/**
+	 * We need _really_ complicated logic to find just the changed subsites (because we use versions there's no explicit
+	 * deletes, just new versions with different members) so just always use all of them
+	 */
+	function extractManipulationWriteState(&$writes) {
+		$self = get_class($this);
+
+		foreach ($writes as $key => $write) {
+			if (!$this->appliesTo($write['class'], true)) continue;
+
+			if (self::$subsites === null) {
+				$query = new SQLQuery('ID', 'Subsite');
+				self::$subsites = array_merge(array('0'), $query->execute()->column());
+			}
+
+			$next = array();
+
+			foreach ($write['statefulids'] as $i => $statefulid) {
+				foreach (self::$subsites as $subsiteID) {
+					$next[] = array('id' => $statefulid['id'], 'state' => array_merge($statefulid['state'], array($self => $subsiteID)));
+				}
+			}
+
+			$writes[$key]['statefulids'] = $next;
+		}
+	}
+
+}