83 lines
1.8 KiB
PHP
83 lines
1.8 KiB
PHP
<?php
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class Db_Updater {
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const SCHEMA_VERSION = 142;
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private $pdo;
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private $db_type;
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function __construct($pdo, $db_type) {
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$this->pdo = $pdo;
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$this->db_type = $db_type;
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}
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/** always returns actual (=uncached) value */
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private static function get_schema_version() {
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return Config::get_schema_version(true);
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}
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static function is_update_required() {
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return self::get_schema_version() < self::SCHEMA_VERSION;
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}
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function get_schema_lines($version) {
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$filename = "schema/versions/".$this->db_type."/$version.sql";
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if (file_exists($filename)) {
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return explode(";", (string)preg_replace("/[\r\n]/", "", (string)file_get_contents($filename)));
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} else {
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user_error("DB Updater: schema file for version $version is not found.");
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return false;
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}
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}
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function update_to($version, $html_output = true) {
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if ($this->get_schema_version() == $version - 1) {
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$lines = $this->get_schema_lines($version);
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if (is_array($lines)) {
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$this->pdo->beginTransaction();
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foreach ($lines as $line) {
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if (strpos($line, "--") !== 0 && $line) {
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if ($html_output)
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print "<pre>$line</pre>";
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else
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Debug::log("> $line");
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try {
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$this->pdo->query($line); // PDO returns errors as exceptions now
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} catch (PDOException $e) {
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if ($html_output) {
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print "<div class='text-error'>Error: " . $e->getMessage() . "</div>";
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} else {
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Debug::log("Error: " . $e->getMessage());
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}
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$this->pdo->rollBack();
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return false;
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}
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}
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}
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$db_version = self::get_schema_version();
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if ($db_version == $version) {
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$this->pdo->commit();
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return true;
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} else {
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$this->pdo->rollBack();
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return false;
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}
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} else {
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return false;
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}
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} else {
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return false;
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}
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}
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}
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