From 8a80e4ec29bb03f9525a528cfedc3b43246871fa Mon Sep 17 00:00:00 2001
From: Neil Blakey-Milner <nbm@knowledgetree.com>
Date: Wed, 20 Jul 2005 18:20:04 +0000
Subject: [PATCH] Add whereToString, converting an array of parameterised strings to a single parameterised string.

---
 lib/util/ktutil.inc | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/lib/util/ktutil.inc b/lib/util/ktutil.inc
index 4e89aa2..3d2a3ac 100644
--- a/lib/util/ktutil.inc
+++ b/lib/util/ktutil.inc
@@ -101,7 +101,33 @@ class KTUtil {
     function requestValue($sKey, $mDefault = null) {
         return KTUtil::arrayGet($_REQUEST, $sKey, $mDefault);
     }
-    
+
+    // {{{ whereToString
+    /**
+     * Convert an array of parameterised strings to a single
+     * parameterised string.
+     *
+     * Return null in case of an empty array.
+     */
+    function whereToString($aWhere) {
+        $aStrings = array();
+        $aParams = array();
+        foreach ($aWhere as $oSomething) {
+            if (is_string($oSomething)) {
+                $aStrings[] = $oSomething;
+            } else if (is_array($oSomething)) {
+                $aStrings[] = $oSomething[0];
+                $aParams = array_merge($aParams, $oSomething[1]); 
+            } else {
+                return PEAR::raiseError("Weird WhereClause passed");
+            }
+        }
+        if (count($aStrings) === 0) {
+            return null;
+        }
+        return array(join(" AND ", $aStrings), $aParams);
+    }
+    // }}}
 }
 // }}}
 
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