83 lines
1.8 KiB
PHP
83 lines
1.8 KiB
PHP
<?php
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class DbUpdater {
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private $pdo;
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private $db_type;
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private $need_version;
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function __construct($pdo, $db_type, $need_version) {
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$this->pdo = Db::pdo(); //$pdo;
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$this->db_type = $db_type;
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$this->need_version = (int) $need_version;
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}
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function getSchemaVersion() {
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$row = $this->pdo->query("SELECT schema_version FROM ttrss_version")->fetch();
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return (int) $row['schema_version'];
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}
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function isUpdateRequired() {
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return $this->getSchemaVersion() < $this->need_version;
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}
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function getSchemaLines($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(";", preg_replace("/[\r\n]/", "", file_get_contents($filename)));
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} else {
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user_error("DB Updater: schema file for version $version is not found.");
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return false;
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}
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}
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function performUpdateTo($version, $html_output = true) {
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if ($this->getSchemaVersion() == $version - 1) {
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$lines = $this->getSchemaLines($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 = $this->getSchemaVersion();
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if ($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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