Created a draft of the migration script

src/messenger/webim/install/migrate.php

@@ -0,0 +1,69 @@
+<?php
+/*
+ * Copyright 2005-2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+require_once('../libs/common.php');
+require_once('../libs/classes/database.php');
+
+$db = Database::getInstance();
+
+$db->throwExeptions(true);
+
+$update_datetime = array(
+	'{chatthread}' => array(
+		'dtmcreated',
+		'dtmchatstarted',
+		'dtmmodified',
+		'lastpinguser',
+		'lastpingagent'
+	),
+	'{chatmessage}' => array(
+		'dtmcreated'
+	),
+	'{chatoperator}' => array(
+		'dtmlastvisited',
+		'dtmrestore'
+	),
+	'{chatban}' => array(
+		'dtmcreated',
+		'dtmtill'
+	),
+	'{chatsitevisitor}' => array(
+		'firsttime',
+		'lasttime',
+		'invitationtime'
+	),
+	'{visitedpage}' => array(
+		'visittime'
+	),
+	'{visitedpagestatistics}' => array(
+		'visittime'
+	)
+);
+
+foreach($update_datetime as $table => $columns) {
+	echo("Table: {$table}<br />");
+	foreach($columns as $column) {
+		echo("-- Column: {$column}<br />");
+		$db->query("ALTER TABLE {$table} CHANGE {$column} {$column}_tmp datetime");
+		$db->query("ALTER TABLE {$table} ADD COLUMN {$column} int NOT NULL DEFAULT 0 AFTER {$column}_tmp");
+		$db->query("UPDATE {$table} SET {$column} = UNIX_TIMESTAMP({$column}_tmp)");
+		$db->query("ALTER TABLE {$table} DROP COLUMN {$column}_tmp");
+	}
+}
+
+
+?>