Closes #60: Enable/disable plugins on a site by site basis

git-svn-id: https://code.elgg.org/elgg/trunk@1017 36083f99-b078-4883-b0ff-0f9b5a30f544

2 files changed, 88 insertions, 1 deletions

diff --git a/engine/lib/metadata.php b/engine/lib/metadata.php
index d01ce0985..610288f90 100644
--- a/engine/lib/metadata.php
+++ b/engine/lib/metadata.php
@@ -399,7 +399,7 @@
 		if ($meta_value!="")
 			$where[] = "m.value_id='$meta_v'";
 		if ($site_guid > 0)
-			$where[] = "e.site_guid = {$site_guid}";
+			$where[] = "m.entity_guid = {$site_guid}";
 		
 		$query = "SELECT m.*, n.string as name, v.string as value from {$CONFIG->dbprefix}entities e JOIN {$CONFIG->dbprefix}metadata m on e.guid = m.entity_guid JOIN {$CONFIG->dbprefix}metastrings v on m.value_id = v.id JOIN {$CONFIG->dbprefix}metastrings n on m.name_id = n.id where";
 		foreach ($where as $w)
diff --git a/engine/lib/plugins.php b/engine/lib/plugins.php
index 0d19bc049..8ead863a1 100644
--- a/engine/lib/plugins.php
+++ b/engine/lib/plugins.php
@@ -230,6 +230,93 @@
 			
 			return false;
 		}
+		
+		/**
+		 * Enable a plugin for a site (default current site)
+		 *
+		 * @param string $plugin The plugin name.
+		 * @param int $site_guid The site id, if not specified then this is detected.
+		 */
+		function enable_plugin($plugin, $site_guid = 0)
+		{
+			global $CONFIG;
+			
+			$site_guid = (int) $site_guid;
+			if ($site_guid == 0)
+				$site_guid = $CONFIG->site_guid;
+				
+			$site = get_entity($site_guid);
+			if (!($site instanceof ElggSite))
+				throw new InvalidClassException(sprintf(elgg_echo('InvalidClassException:NotValidElggStar'), $site_guid, "ElggSite"));
+				
+			$enabled = $site->getMetaData('enabled_plugins');
+			$new_enabled = array();
+			if ($enabled)
+			{
+				if (!is_array($enabled))
+					$new_enabled[] = $enabled;
+				else
+					$new_enabled = $enabled;
+			}
+			$new_enabled[] = $plugin;
+			$new_enabled = array_unique($new_enabled);
+			
+			return $site->setMetaData('enabled_plugins', $new_enabled);
+		}
+		
+		/**
+		 * Disable a plugin for a site (default current site)
+		 *
+		 * @param string $plugin The plugin name.
+		 * @param int $site_guid The site id, if not specified then this is detected.
+		 */
+		function disable_plugin($plugin, $site_guid = 0)
+		{
+			global $CONFIG;
+			
+			$site_guid = (int) $site_guid;
+			if ($site_guid == 0)
+				$site_guid = $CONFIG->site_guid;
+				
+			$site = get_entity($site_guid);
+			if (!($site instanceof ElggSite))
+				throw new InvalidClassException(sprintf(elgg_echo('InvalidClassException:NotValidElggStar'), $site_guid, "ElggSite"));
+				
+			$enabled = $site->getMetaData('enabled_plugins');
+			$new_enabled = array();
+		
+			foreach ($enabled as $plug)
+				if ($plugin != $plug)
+					$new_enabled[] = $plug;
+					
+			return $site->setMetaData('enabled_plugins', $new_enabled);
+		}
+		
+		/**
+		 * Return whether a plugin is enabled or not.
+		 *
+		 * @param string $plugin The plugin name.
+		 * @param int $site_guid The site id, if not specified then this is detected.
+		 * @return bool
+		 */
+		function is_plugin_enabled($plugin, $site_guid = 0)
+		{
+			global $CONFIG;
+			
+			$site_guid = (int) $site_guid;
+			if ($site_guid == 0)
+				$site_guid = $CONFIG->site_guid;
+				
+			$site = get_entity($site_guid);
+			if (!($site instanceof ElggSite))
+				throw new InvalidClassException(sprintf(elgg_echo('InvalidClassException:NotValidElggStar'), $site_guid, "ElggSite"));
+				
+			$enabled = find_metadata("enabled_plugins", $plugin, "site", "", 10, 0, "", $site_guid);
+			if ($enabled)
+				return true;
+				
+			return false;
+		}
 		

 		/**
 		 * Run once and only once.