upgrade.php: test edition of a db upgrade script, based loosely around what Drupal uses

git-svn-id: https://svn.code.sf.net/p/postfixadmin/code/trunk@170 a1433add-5e2c-0410-b055-b7f2511e0802

upgrade.php

@@ -0,0 +1,68 @@
+<?php
+require_once('common.php');
+$sql = "SELECT * FROM config WHERE name = 'version'";
+
+// create table config (name varchar(20), value varchar(20));
+// insert into config('version', '01');
+// Should really query the db to see if the 'config' table exists first!
+
+$r = db_query($sql);
+
+if($r['rows'] == 1) {
+    $rs = $r['result'];
+    $row = db_array($rs);
+    $version = $row['value'];
+    _do_upgrade($version);
+}
+
+
+function _do_upgrade($current_version) {
+    $all_functions = get_defined_functions();
+    $upgrade_functions = array();
+    foreach($all_functions['user'] as $function_name) {
+        if(preg_match('!upgrade_(\d+)!', $function_name, $matches)) {
+            $version = $matches[1];
+            if($version <= $current_version) {
+                continue;
+            }
+            $upgrade_functions[$matches[1]] = $function_name;
+        }
+    }
+
+    ksort($upgrade_functions);
+    foreach($upgrade_functions as $version => $function) {
+        $function();
+    }
+}
+
+function upgrade_00() {
+    global $CONF;
+    if($CONF['database_type'] == 'mysql') {
+        echo 'mysql 00';
+    }
+    if($CONF['database_type'] == 'pgsql') {
+        echo 'pgsql 00';
+    }
+}
+
+function upgrade_01() {
+    global $CONF;
+    if($CONF['database_type'] == 'mysql') {
+        echo 'mysql 01';
+    }
+    if($CONF['database_type'] == 'pgsql') {
+        echo 'pgsql 01';
+    }
+}
+function upgrade_02() {
+    global $CONF;
+    if($CONF['database_type'] == 'mysql') {
+        echo 'mysql 02';
+    }
+    if($CONF['database_type'] == 'pgsql') {
+        echo 'pgsql 02';
+    }
+}
+function upgrade_03() {
+    echo 'woof 03';
+}