function db_create_table($name, $fields, $verbose, $action, $indexes = null)
{
global $a, $db;
$r = true;
$sql = "";
$sql_rows = array();
foreach ($fields as $fieldname => $field) {
$sql_rows[] = "`" . dbesc($fieldname) . "` " . db_field_command($field);
}
if (!is_null($indexes)) {
foreach ($indexes as $indexname => $fieldnames) {
$sql_index = db_create_index($indexname, $fieldnames, "");
if (!is_null($sql_index)) {
$sql_rows[] = $sql_index;
}
}
}
$sql = implode(",\n\t", $sql_rows);
$sql = sprintf("CREATE TABLE IF NOT EXISTS `%s` (\n\t", dbesc($name)) . $sql . "\n) DEFAULT CHARSET=utf8";
if ($verbose) {
echo $sql . ";\n";
}
if ($action) {
$r = @$db->q($sql);
}
return $r;
}
function update_structure($verbose, $action)
{
global $a, $db;
$errors = false;
logger('updating structure', LOGGER_DEBUG);
// Get the current structure
$database = array();
$tables = q("show tables");
foreach ($tables as $table) {
$table = current($table);
$database[$table] = table_structure($table);
}
// Get the definition
$definition = db_definition();
// Compare it
foreach ($definition as $name => $structure) {
$sql3 = "";
if (!isset($database[$name])) {
$r = db_create_table($name, $structure["fields"], $verbose, $action);
if (false === $r) {
$errors .= t('Errors encountered creating database tables.') . $name . EOL;
}
} else {
// Drop the index if it isn't present in the definition
foreach ($database[$name]["indexes"] as $indexname => $fieldnames) {
if (!isset($structure["indexes"][$indexname])) {
$sql2 = db_drop_index($indexname);
if ($sql3 == "") {
$sql3 = "ALTER TABLE `" . $name . "` " . $sql2;
} else {
$sql3 .= ", " . $sql2;
}
}
}
// Compare the field structure field by field
foreach ($structure["fields"] as $fieldname => $parameters) {
if (!isset($database[$name]["fields"][$fieldname])) {
$sql2 = db_add_table_field($fieldname, $parameters);
if ($sql3 == "") {
$sql3 = "ALTER TABLE `" . $name . "` " . $sql2;
} else {
$sql3 .= ", " . $sql2;
}
} else {
// Compare the field definition
$current_field_definition = implode($database[$name]["fields"][$fieldname]);
$new_field_definition = implode($parameters);
if ($current_field_definition != $new_field_definition) {
$sql2 = db_modify_table_field($fieldname, $parameters);
if ($sql3 == "") {
$sql3 = "ALTER TABLE `" . $name . "` " . $sql2;
} else {
$sql3 .= ", " . $sql2;
}
}
}
}
}
// Create the index
foreach ($structure["indexes"] as $indexname => $fieldnames) {
if (!isset($database[$name]["indexes"][$indexname])) {
$sql2 = db_create_index($indexname, $fieldnames);
if ($sql2 != "") {
if ($sql3 == "") {
$sql3 = "ALTER TABLE `" . $name . "` " . $sql2;
} else {
$sql3 .= ", " . $sql2;
}
}
}
}
if ($sql3 != "") {
$sql3 .= ";";
if ($verbose) {
echo $sql3 . "\n";
}
if ($action) {
$r = @$db->q($sql3);
if (false === $r) {
$errors .= t('Errors encountered performing database changes.') . $sql3 . EOL;
}
}
}
}
return $errors;
}
