1 files changed, 53 insertions, 7 deletions

diff --git a/Zotlabs/Lib/Apps.php b/Zotlabs/Lib/Apps.php
index 6d2ef4e45..9dd4bf2d7 100644
--- a/Zotlabs/Lib/Apps.php
+++ b/Zotlabs/Lib/Apps.php
@@ -13,6 +13,8 @@ require_once('include/channel.php');
 
 class Apps {
 
+	static public $installed_system_apps = null;
+
 	static public function get_system_apps($translate = true) {
 
 		$ret = array();
@@ -49,22 +51,62 @@ class Apps {
 	static public function import_system_apps() {
 		if(! local_channel())
 			return;
+		$apps = self::get_system_apps(false);
 
-		// Eventually we want to look at modification dates and update system apps.
 
-		$installed = get_pconfig(local_channel(),'system','apps_installed');
-		if($installed)
-			return;
-		$apps = self::get_system_apps(false);
+		self::$installed_system_apps = q("select * from app where app_system = 1 and app_channel = %d",
+			intval(local_channel())
+		);
+
 		if($apps) {
 			foreach($apps as $app) {
+				$id = self::check_install_system_app($app);
+				// $id will be boolean true or false to install an app, or an integer id to update an existing app
+				if($id === false)
+					continue;
+				if($id !== true) {
+					// if we already installed this app, but it changed, preserve any categories we created
+					$s = '';
+					$r = q("select * from term where otype = %d and oid = d",
+						intval(TERM_OBJ_APP),
+						intval($id)
+					);
+					if($r) {
+						foreach($r as $t) {
+							if($s)
+								$s .= ',';
+							$s .= $t['term'];
+						}
+						$app['categories'] = $s;
+					}
+				}
 				$app['uid'] = local_channel();
 				$app['guid'] = hash('whirlpool',$app['name']);
 				$app['system'] = 1;
-				self::app_install(local_channel(),$app);			
+				self::app_install(local_channel(),$app);
 			}
 		}					
-		set_pconfig(local_channel(),'system','apps_installed',1);
+	}
+
+	/**
+	 * Install the system app if no system apps have been installed, or if a new system app 
+	 * is discovered, or if the version of a system app changes.
+	 */
+
+	static public function check_install_system_app($app) {
+		if((! is_array(self::$installed_system_apps)) || (! count(self::$installed_system_apps))) {
+			return true;
+		}
+		$notfound = true;
+		foreach(self::$installed_system_apps as $iapp) {
+			if($iapp['app_id'] == hash('whirlpool',$app['name'])) {
+				$notfound = false;
+				if($iapp['app_version'] != $app['version']) {
+					return intval($iapp['app_id']);
+				}
+			}
+		}
+		return $notfound;
 	}
 
 
@@ -111,6 +153,10 @@ class Apps {
 		if(array_key_exists('target',$ret))
 			$ret['target'] = str_replace(array('\'','"'),array(''','&dquot;'),$ret['target']);
 
+		if(array_key_exists('version',$ret))
+			$ret['version'] = str_replace(array('\'','"'),array(''','&dquot;'),$ret['version']);
+
+
 		if(array_key_exists('requires',$ret)) {
 			$requires = explode(',',$ret['requires']);
 			foreach($requires as $require) {