From 1f851e08ba9274fa524db6f75b2c2cc21ec4dcf2 Mon Sep 17 00:00:00 2001
From: marcus <marcus@36083f99-b078-4883-b0ff-0f9b5a30f544>
Date: Tue, 19 Aug 2008 14:12:35 +0000
Subject: Refs #256: Basic installation parameters checked. Fixes #266: If the
 install flag isn't set then elgg_view will no longer attempt to load data
 from the database.

git-svn-id: https://code.elgg.org/elgg/trunk@2016 36083f99-b078-4883-b0ff-0f9b5a30f544
---
 engine/lib/database.php | 21 +++++++++++++++++++++
 engine/lib/elgglib.php  |  2 +-
 engine/lib/install.php  | 34 ++++++++++++++++++++++++++++++++++
 3 files changed, 56 insertions(+), 1 deletion(-)

(limited to 'engine')

diff --git a/engine/lib/database.php b/engine/lib/database.php
index 9df5f991c..86044a375 100644
--- a/engine/lib/database.php
+++ b/engine/lib/database.php
@@ -408,6 +408,27 @@
         		throw new DatabaseException(sprintf(elgg_echo('DatabaseException:ScriptNotFound'), $scriptlocation));
         	}
         	
+        }
+        
+        /**
+         * This function, called by validate_platform(), will check whether the installed version of
+         * MySQL meets the minimum required.
+         *
+         * TODO: If multiple dbs are supported check which db is supported and use the appropriate code to validate
+         * the appropriate version.
+         * 
+         * @return bool
+         */
+        function db_check_version()
+        {
+        	$version = mysql_get_server_info();
+        	
+        	$points = explode('.', $version);
+        	
+        	if ($points[0] < 5)
+        		return false;
+
+        	return true;
         }
         
 	/**
diff --git a/engine/lib/elgglib.php b/engine/lib/elgglib.php
index 1358b84fc..8da54f10d 100644
--- a/engine/lib/elgglib.php
+++ b/engine/lib/elgglib.php
@@ -195,7 +195,7 @@
 		    } else {
 		    	$vars['page_owner'] = -1;
 		    }
-		    if ($vars['page_owner'] != -1) {
+		    if (($vars['page_owner'] != -1) && (is_installed())) {
 		        if (!isset($usercache[$vars['page_owner']])) {
 		    	       $vars['page_owner_user'] = get_entity($vars['page_owner']);
 		    	       $usercache[$vars['page_owner']] = $vars['page_owner_user'];
diff --git a/engine/lib/install.php b/engine/lib/install.php
index ca615c473..c0ed7ab91 100644
--- a/engine/lib/install.php
+++ b/engine/lib/install.php
@@ -11,6 +11,40 @@
 	 * @copyright Curverider Ltd 2008
 	 * @link http://elgg.org/
 	 */
+
+		/**
+		 * Check that the installed version of PHP meets the minimum requirements (currently 5.2 or greater).
+		 * 
+		 * @return bool
+		 */
+		function php_check_version()
+		{
+			if (version_compare(phpversion(), '5.2.0', '>='))
+				return true;
+				
+			return false;
+		}
+	
+		/**
+		 * Validate the platform Elgg is being installed on.
+		 *
+		 * @throws ConfigurationException if the validation fails.
+		 * @return bool
+		 */
+		function validate_platform()
+		{
+			// Get database version
+			if (!db_check_version())
+				throw new ConfigurationException(elgg_echo('ConfigurationException:BadDatabaseVersion'));
+			
+			// Now check PHP
+			if (!php_check_version())
+				throw new ConfigurationException(elgg_echo('ConfigurationException:BadPHPVersion'));
+				
+			// TODO: Consider checking for installed modules etc
+				
+			return true;
+		}
 
 	/**
 	 * Returns whether or not the database has been installed
-- 
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