From aa44ce6e9703ab15bb5270251358fb756a347f17 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Wed, 5 Jun 2013 18:54:26 +0200
Subject: Add optional argument to now() for simple interval calculations on
 SQL-side

---
 program/lib/Roundcube/rcube_db.php        | 12 ++++++++++--
 program/lib/Roundcube/rcube_db_mssql.php  | 12 ++++++++----
 program/lib/Roundcube/rcube_db_pgsql.php  | 21 ++++++++++++++++++---
 program/lib/Roundcube/rcube_db_sqlite.php | 10 ++++++++--
 program/lib/Roundcube/rcube_db_sqlsrv.php |  9 ++++++++-
 5 files changed, 52 insertions(+), 12 deletions(-)

diff --git a/program/lib/Roundcube/rcube_db.php b/program/lib/Roundcube/rcube_db.php
index 69793b91a..086fd66cb 100644
--- a/program/lib/Roundcube/rcube_db.php
+++ b/program/lib/Roundcube/rcube_db.php
@@ -711,11 +711,19 @@ class rcube_db
     /**
      * Return SQL function for current time and date
      *
+     * @param int $interval Optional interval (in seconds) to add/subtract
+     *
      * @return string SQL function to use in query
      */
-    public function now()
+    public function now($interval = 0)
     {
-        return "now()";
+        if ($interval) {
+            $add = ' ' . ($interval > 0 ? '+' : '-') . ' INTERVAL ';
+            $add .= $interval > 0 ? intval($interval) : intval($interval) * -1;
+            $add .= ' SECONDS';
+        }
+
+        return "now()" . $add;
     }
 
     /**
diff --git a/program/lib/Roundcube/rcube_db_mssql.php b/program/lib/Roundcube/rcube_db_mssql.php
index 37a42678a..71317078c 100644
--- a/program/lib/Roundcube/rcube_db_mssql.php
+++ b/program/lib/Roundcube/rcube_db_mssql.php
@@ -48,19 +48,23 @@ class rcube_db_mssql extends rcube_db
     /**
      * Return SQL function for current time and date
      *
+     * @param int $interval Optional interval (in seconds) to add/subtract
+     *
      * @return string SQL function to use in query
      */
-    public function now()
+    public function now($interval = 0)
     {
+        if ($interval) {
+            $interval = intval($interval);
+            return "dateadd(second, $interval, getdate())";
+        }
+
         return "getdate()";
     }
 
     /**
      * Return SQL statement to convert a field value into a unix timestamp
      *
-     * This method is deprecated and should not be used anymore due to limitations
-     * of timestamp functions in Mysql (year 2038 problem)
-     *
      * @param string $field Field name
      *
      * @return string SQL statement to use in query
diff --git a/program/lib/Roundcube/rcube_db_pgsql.php b/program/lib/Roundcube/rcube_db_pgsql.php
index 90adf4bad..984dd57a1 100644
--- a/program/lib/Roundcube/rcube_db_pgsql.php
+++ b/program/lib/Roundcube/rcube_db_pgsql.php
@@ -75,9 +75,6 @@ class rcube_db_pgsql extends rcube_db
     /**
      * Return SQL statement to convert a field value into a unix timestamp
      *
-     * This method is deprecated and should not be used anymore due to limitations
-     * of timestamp functions in Mysql (year 2038 problem)
-     *
      * @param string $field Field name
      *
      * @return string SQL statement to use in query
@@ -88,6 +85,24 @@ class rcube_db_pgsql extends rcube_db
         return "EXTRACT (EPOCH FROM $field)";
     }
 
+    /**
+     * Return SQL function for current time and date
+     *
+     * @param int $interval Optional interval (in seconds) to add/subtract
+     *
+     * @return string SQL function to use in query
+     */
+    public function now($interval = 0)
+    {
+        if ($interval) {
+            $add = ' ' . ($interval > 0 ? '+' : '-') . " interval '";
+            $add .= $interval > 0 ? intval($interval) : intval($interval) * -1;
+            $add .= " seconds'";
+        }
+
+        return "now()" . $add;
+    }
+
     /**
      * Return SQL statement for case insensitive LIKE
      *
diff --git a/program/lib/Roundcube/rcube_db_sqlite.php b/program/lib/Roundcube/rcube_db_sqlite.php
index e548ed1f9..cef6621c2 100644
--- a/program/lib/Roundcube/rcube_db_sqlite.php
+++ b/program/lib/Roundcube/rcube_db_sqlite.php
@@ -94,11 +94,17 @@ class rcube_db_sqlite extends rcube_db
     /**
      * Return SQL function for current time and date
      *
+     * @param int $interval Optional interval (in seconds) to add/subtract
+     *
      * @return string SQL function to use in query
      */
-    public function now()
+    public function now($interval = 0)
     {
-        return "datetime('now')";
+        if ($interval) {
+            $add = ($interval > 0 ? '+' : '') . intval($interval) . ' seconds';
+        }
+
+        return "datetime('now'" . ($add ? ",'$add'" : "") . ")";
     }
 
     /**
diff --git a/program/lib/Roundcube/rcube_db_sqlsrv.php b/program/lib/Roundcube/rcube_db_sqlsrv.php
index e5dfb1154..9958dc291 100644
--- a/program/lib/Roundcube/rcube_db_sqlsrv.php
+++ b/program/lib/Roundcube/rcube_db_sqlsrv.php
@@ -48,10 +48,17 @@ class rcube_db_sqlsrv extends rcube_db
     /**
      * Return SQL function for current time and date
      *
+     * @param int $interval Optional interval (in seconds) to add/subtract
+     *
      * @return string SQL function to use in query
      */
-    public function now()
+    public function now($interval = 0)
     {
+        if ($interval) {
+            $interval = intval($interval);
+            return "dateadd(second, $interval, getdate())";
+        }
+
         return "getdate()";
     }
 
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